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T7350 Commercial Programmable Thermostat  
FOR SINGLE- OR MULTI-STAGE CONVENTIONAL/HEAT PUMP SYSTEMS  
PRODUCT DATA  
FEATURES  
Typically used in buildings (including: restaurants,  
shopping malls, office buildings and banks) under  
55,000 square feet.  
For single zone rooftop units, split systems, heat  
pumps or hot/chilled water systems.  
7-day programming.  
Two Occupied and two Not Occupied periods per day.  
Advanced configuration using TStatSpec software or  
PDA.  
Individual heat and cool setpoints available for  
Occupied and Not Occupied periods.  
P+I+D control minimizes temperature fluctuations.  
Recovery ramp control automatically optimizes  
equipment start times based on building load.  
Convenient overrides allow temporary setpoint  
changes.  
APPLICATION  
Keypad multi-level lockout available with all models.  
The T7350 Commercial Programmable Thermostat controls  
Remote sensor capability for temperature (including  
outdoor air and discharge air) and humidity sensors.  
2
4 Vac commercial single zone heating, ventilating and air  
conditioning (HVAC) equipment. The T7350 consists of a  
thermostat and subbase. The thermostat includes the keypad  
and display for 7-day programming. The subbase includes  
equipment control connections. The subbase mounts on the  
wall and the thermostat mounts to the subbase.  
Auxiliary subbase contact typically interface with a  
Honeywell Economizer System (for total rooftop  
control integration) or act as dehumidification output.  
Universal Versaguard™ Thermostat guards available.  
T7350H provides networking capability on LonWorks®  
Bus using a Free Topology Transceiver (FTT).  
®
T7350H Conforms to LonMark Space Comfort Profile  
for rooftop applications.  
continued  
Contents  
Specifications ...................................................................  
Installation ........................................................................  
3
6
Settings ............................................................................ 11  
Installer Setup .................................................................. 12  
Programming .................................................................... 16  
Operation .......................................................................... 19  
Troubleshooting Guide (Table 19) .................................... 25  
Wiring Diagrams (Fig. 17-25) ........................................... 27  
Appendix - PDA Usage .................................................... 32  
6
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T7350 Commercial Programmable Thermostat  
FEATURES (continued from page 1)  
Features Available via TStatSpec or  
PDA Configuration  
Features via Optional Network  
Model-H  
®
365 day clock with holiday programming.  
Automatic Daylight Saving Time adjustments.  
Selectable dehumidification limit control.  
Modulating output configuration.  
Communications on LonTalk network.  
Network Tools (LonSpec, CARE) have ability to  
configure all PDA available features.  
T7350 Network data inputs including outdoor air  
temperature, Occupancy Sensor, Electric Demand  
Shed/Restore, room temperature and humidity.  
Occupancy input to control standby setpoint.  
Additional standby period used in low traffic areas.  
Sequential start option.  
Use T7350H to time-schedule up to 119 network  
connected XL10 + XL15c devices.  
Time synchronization with a network master clock or  
the T7350H configured as the network master clock.  
Discharge air high/low limits.  
Selectable recovery ramp.  
Remote manual occupancy changes to the T7350 via  
Command Display (S7760).  
Ambient lockout (with outdoor sensor).  
System monitoring.  
View and modify weekly schedules and holidays via  
Command Display (S7760).  
Application database with download and storing.  
Remote changes to the T7350 occupancy override,  
schedules, fan operation (on auto), system mode (off,  
auto, heat, cool) and room temperature setpoints via  
Workstation.  
Remote unoccupied bypass controlled from another  
device.  
Remote T7350 data and alarm monitoring via  
Command Display or Workstation.  
Network Manual Mode allows a remote user to turn on/  
off or modulate each output via a network connection.  
LonMark plugin software to facilitate third party  
configuration tools and workstations.  
ORDERING INFORMATION  
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the  
TRADELINE® Catalog or price sheets for complete ordering number.  
If you have additional questions, need further information, or would like to comment on our products or services, please write or  
phone:  
1
2
.
.
Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).  
Honeywell Customer Care  
1
885 Douglas Drive North  
Minneapolis, Minnesota 55422-4386  
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.  
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,  
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.  
63-2605—06  
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T7350 Commercial Programmable Thermostat  
SPECIFICATIONS  
IMPORTANT  
Models: See Table 1.  
The specifications given in this publication do not  
include normal manufacturing tolerances. Therefore,  
this unit might not exactly match listed specifications.  
This product is tested and calibrated under closely  
controlled conditions; minor performance differences  
can be expected if those conditions are changed.  
Dimensions: See Fig. 1.  
Finish (color): Trident White.  
Batteries: No batteries required.  
Table 1. T7350 Thermostat Features.  
Maximum Stagesa  
Heat Cool  
Auxiliary LONWORKS®  
Relay Capability?  
Model  
T7350A  
Applications  
Features  
Conventional  
or  
1b  
1b  
2b  
3 (4)c  
Yes No  
T7350B  
Heat Pump 2b  
Outdoor, Discharge Air Capability  
Yes  
Yes  
T7350D  
T7350H1009  
T7350H1017 Modulating  
(2)c  
Humidity, Occupancy,  
3
Outdoor, Discharge Air Capability  
Isolated Yes  
Normally  
Yes  
b
Humidity, Occupancy,  
2
modulating, 2 relay  
Open  
Outdoor, Discharge Air Capability,  
T7350M  
4-20 mA output (2-10 Vdc with 500 ohm resistor) Yes  
No  
a
All models are down-selectable and can be configured to control fewer stages than the maximum allowed.  
One extra stage (of either heat or cool) can be configured using the auxiliary relay.  
Heat pump applications for these models have a maximum of two heat stages and two cool stages.  
b
c
Mounting Means:  
Humidity Ratings: 5% to 90% RH, noncondensing.  
Mounts on subbase.  
Subbase Mounts On:  
Emergency Heat Indication:  
Display indicates when Emergency Heat is activated (Em).  
Wall: Using two 5/8 in. long #6-32 screws (included).  
Outlet Box: Using sheet metal screws.  
Temperature:  
Throttling Range for Modulating Outputs:  
Automatically adjusts based on heat/cool stages. Manually  
adjustable with TStatSpec software or PDA.  
Ratings:  
Operating Ambient: 30°F to 110°F (-1°C to 43°C).  
Shipping: -30°F to +150°F (-34°C to +66°C).  
Display Accuracy: ±1°F (±1°C).  
Setpoint:  
Clock Accuracy (at 77° F [25° C]): ±1 min./month (30 days).  
Range:  
Minimum Stage Operation Time (fixed):  
Minimum On  
Heating: 40°F to 90°F (4°C to 32°C).  
Cooling: 45°F to 99°F (7°C to 37°C).  
Deadband: 2°F (1°C).  
Heat: 1 minutes.  
Cool: 3 minutes.  
Default Settings: See Table 2.  
Minimum Off (Cool and Heat Pump): 1 minute.  
Loss of Power: The thermostat maintains programmed times  
and temperatures for the life of the product. Clock and day  
information is retained for a minimum of 48 hours.  
Electrical Ratings:  
Power: 24 Vac, 50/60 Hz.; 20 to 30 Vac, 50/60 Hz.  
Input:  
NOTE: To achieve the 48-hour power-loss clock retention,  
the T7350 must be powered for at least 5 minutes.  
Temperature: 20K ohms.  
Humidity: 0-10 Vdc.  
Outdoor: 3000 PTC.  
Communicating Model T7350H:  
Discharge Air: 20K ohms.  
Connection Terminals for the LonWorks Bus.  
Network jack for quick access by personal computer based  
tools.  
Occupancy Sensor: Dry contact switching 30 Vdc at 1 mA.  
All Relay Outputs (at 30 Vac):  
Running: 1.5A maximum.  
Communications service-pin pushbutton to simplify startup.  
LonMark Functional Profile: 8500_20 Space Comfort  
Controller.  
Inrush: 7.5A maximum.  
Modulating Output: 4 to 20 mA with 510 ohm maximum  
terminating resistance.  
LonMark SCC Object Type: 8504 Rooftop See Fig. 2.  
LonMark Program Identifier: 80:00:0C:55:04:03:04:2E.  
LonMark Application Interoperability: version 3.3  
Honeywell LonMark Plug-In file downloads:  
System Current Draw (without load):  
5
VA maximum at 30 Vac, 50/60 Hz.  
NOTE: Relays are N.O. Single-Pole, Single-Throw (SPST).  
Outdoor Sensor Wiring: Requires 18 gauge wire.  
3
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T7350 Commercial Programmable Thermostat  
TStat Spec System Requirements:  
Windows XP or Windows 7  
Accessories:  
Duct Discharge Air Sensors:  
C7041B (6 or 12 in. [152 or 305 mm]),  
C7041C (18 in. [457 mm]),  
PDA System Requirements:  
®
Palm OS : 3.5.x to 5.2.1  
C7041J (12 ft. [3.66 m] averaging),  
C7770A (8 in. [203 mm] probe).  
Outdoor Air Sensors: C7089A, C7170A,  
C7031G2014 (weatherproof).  
Dynamic Heap: 256K bytes.  
Free RAM Space: 1000K bytes.  
Serial Communications: RS-232.  
Temperature Sensors (Remote): C7772A, TR21, TR22, TR23,  
TR24, T7771.  
Approvals:  
European Community Mark (CE) Listed.  
UL 873 Recognized, NEC Class 2.  
FCC Part 15 subpart J Class A.  
cUL.  
Economizer Logic Modules: W6210, W6215, W7210, W7212,  
W7215, W7459.  
Humidity Sensors: H7625, H7635.  
®
PDA Units: Palm V, M125, and i705 handhelds;  
TRGPro handheld; ZIRE™ 71 handheld;  
TUNGSTEN™ T handheld.  
Others:  
Table 2. Default Setpoints.  
Not  
2
09541B FTT network termination module.  
09651A Vertical Mounting Hardware Wallplate Adapter  
(Trident white).  
Control  
Heating  
Cooling  
Occupied  
Occupied  
Standby  
2
70° F (21° C) 55° F (13° C) 67° F (19° C)  
75° F (24° C) 85° F (29° C) 78° F (26° C)  
5
5
5
0000083-001 Thermostat Interface Module (TIM).  
0014064-001 Infra-Red TIM.  
0000452-001 Troubleshooting Cable.  
AK3797 Single pair network cable plenum rated,  
U.L. Type CMP.  
2
-3/16 (56)  
1
-9/16  
40)  
6
-3/4 (171)  
(
AK3798 Single pair network cable, U.L. Type CMR.  
AK3799 Double pair network cable plenum rated,  
U.L. Type CMP.  
Q7740A FTT network 2-way repeater.  
Q7740B FTT network 4-way repeater.  
TG512 Universal Versaguard™ Thermostat guards.  
4
-1/2  
114)  
(
SUBBASE  
2
(
-1/32  
52)  
4
(
-1/16  
104)  
2
(
-1/32  
52)  
1
(
-5/8  
42)  
2-3/8 (60)  
-1/4 (83)  
-9/16 (166)  
1-5/8  
(42)  
3
M22432  
6
Fig. 1. Thermostat and subbase dimensions in inches (mm).  
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T7350 Commercial Programmable Thermostat  
Hardware Output  
Node  
Object  
Hardware Output  
SCC-Rooftop  
Object Number 8504.  
nviRequest  
SNVT_obj_request  
nvoStatus  
SNVT_ obj_status  
nviSpaceTemp  
SNVT_temp_p  
nvoSpaceTemp  
SNVT_ temp_p  
nv1  
Mandatory  
Network  
Variables  
nv2  
nv6  
nv1  
Mandatory nv26  
Network  
nvoUnitStatus  
SNVT_hvac_status  
Variables  
nv27  
nviTimeSet  
SNVT_ time_stamp  
nvoFileStat  
SNVT_file_status  
nv3  
nv5  
nv7  
nviSetpoint  
SNVT_ temp_p  
nvoEffectSetpt  
SNVT_temp_p  
nv2  
nv5  
nv28  
nv29  
nv30  
nv34  
nv37  
nv43  
nv45  
Optional  
Network  
Variables  
nviFileReq  
SNVT_file_req  
nviOccSchedule  
SNVT_tod_event  
nvoEffectOccup  
SNVT_occupancy  
nviFilePos  
SNVT_file_pos  
Optional  
Network  
Variables  
nviOccManCmd  
SNVT_occupancy  
nvoHeatCool  
SNVT_hvac_mode  
nv6  
nviOccSensor  
SNVT_occupancy  
nvoDischAirTemp  
SNVT_temp_p  
Configuration Properties  
UCPTdevName  
UCPTapplVer  
nv7  
nc1 - nciDeviceName  
nc2 - nciApplVer  
(manf specific)  
(manf specific)  
nroT7350Ver  
nv11  
UNVT_version  
nviApplicMode  
SNVT_hvacMode  
nvoTerminalLoad  
SNVT_lev_percent  
nv8  
nviOutdoorTemp  
SNVT_Temp_p  
nvoSpaceRH  
SNVT_lev_percent  
nv19  
nv20  
nviInUse  
UNVT_inUse  
nv9  
nviSpaceRH  
SNVT_lev_percent  
nvoOutdoorTemp  
SNVT_temp_p  
nviPgm  
UNVT_pgmIn  
nroPgmVer  
nv12  
UNVT_pgmId  
nv10  
Manufacturer nv13 nvoPgm  
Configuration Properties  
UNVT_pgmOut  
nc1 - nciSndHrtBt  
SNVT_time_sec  
SNVT_time_sec  
SNVT_temp_setpt  
SNVT_time_min  
UCPTconfig  
(mandatory)  
(optional)  
(mandatory)  
(optional)  
Defined  
Section  
nc4 - nciRevHrtBt  
nc2 - nciSetpoints  
nc6 - nciBypassTime  
nciConfig  
nvoTime  
SNVT_time_stamp  
nv14  
nv15  
nv16  
nv17  
nv18  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
(manf specific)  
nvoAlarmH  
UNVT_alarm  
nciConfigPts  
nciDayLghtSav  
UCPTconfigPts  
UCPTdaylightSav  
nvoAlarmStatus  
UNVT_alarmStatus  
nciDaySchedule0 UCPTschedule0  
nciDaySchedule1 UCPTschedule1  
nciDaySchedule2 UCPTschedule2  
nciDaySchedule3 UCPTschedule3  
nciDaySchedule4 UCPTschedule4  
nciDaySchedule5 UCPTschedule5  
nciDaySchedule6 UCPTschedule6  
nciDaySchedule7 UCPTschedule7  
nvoAlarmLog  
UNVT_alarmLog  
nvoError  
UNVT_error  
nciHolSched  
UCPTholSched  
Hardware Input  
nviBypass  
SNVT_switch  
nvoBypass  
nv43  
SNVT_switch  
nv30  
nv31  
nv32  
nv34  
nviFanAuto  
SNVT_switch  
nvoOccSchedule  
SNVT_tod_event  
nv44  
nv45  
nv46  
nv47  
Manufacturer  
Defined  
Section  
nviManValue  
UNVT_manValue  
nvoOccSensor  
SNVT_occupancy  
nviDlcShed  
UNVT_dlcShed  
nvoData1  
UNVT_data1  
nvoData2  
UNVT_data2  
Hardware Input  
M22431  
Fig. 2. T7350H LonMark Space Comfort Controller Rooftop Object (8504) with Node Object.  
5
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T7350 Commercial Programmable Thermostat  
INSTALLATION  
NOTE: Allow sufficient clearance below the thermostat to  
plug in the TIM cable.  
When Installing this Product...  
1.  
Read these instructions carefully. Failure to follow them  
could damage the product or cause a hazardous  
condition.  
Install the remote-mounted sensor(s) about 5 ft (1.5m) above  
the floor in an area with good air circulation at average  
temperature. (See Fig. 3.)  
2.  
3.  
4.  
Check ratings given in instructions and on the product to  
ensure the product is suitable for your application.  
Installer must be a trained, experienced service  
technician.  
If multiple remote sensors are required, they must be arranged  
in a temperature averaging network consisting of four or nine  
sensors. (See Fig. 4 and 6.)  
After installation is complete, check out product  
operation as provided in these instructions.  
NOTE: Only TR20 models with neither setpoint adjustment  
nor bypass can be used for temperature averaging.  
CAUTION  
Electrical Shock or Equipment Damage Hazard.  
Can shock individuals or short equipment  
circuitry.  
Disconnect power supply before installation.  
YES  
NO  
IMPORTANT  
NO  
NO  
5 FEET  
1.5 METERS)  
All wiring must agree with applicable codes,  
(
ordinances and regulations.  
MERCURY NOTICE  
If this control is replacing a control that contains  
mercury in a sealed tube, do not place your old  
control in the trash. Dispose of properly.  
M4823A  
Fig. 3. Typical location of thermostat  
or remote-mounted sensor.  
Contact your local waste management authority for  
instructions regarding recycling and the proper disposal  
of an old control. If you have questions, call Honeywell  
Customer Care Center at 1-800-468-1502.  
IMPORTANT  
To avoid electrical interference, which can cause  
erratic performances, keep wiring runs as short as  
possible and do not run thermostat wires adjacent to  
the line voltage electrical distribution systems. Use  
shielded cable (Belden type 8762 or equivalent for  
Location  
Do not install the thermostat where it can be affected by:  
2
-wire). The cable shield must be grounded only at  
drafts, or dead spots behind doors and in corners.  
hot or cold air from ducts.  
the controlled equipment case.  
radiant heat from sun or appliances.  
concealed pipes and chimneys.  
Mounting Subbase  
unheated (uncooled) areas such as an outside wall behind  
the thermostat.  
The subbase mounts horizontally or vertically.  
IMPORTANT  
Subbase  
When using the internal temperature sensor, the  
device must be mounted horizontally (with the LCD  
facing upwards). Precise leveling is not needed.  
When using remote sensors, thermostat mounting ori-  
entation does not matter.  
WHEN USED TO SENSE ROOM TEMPERATURE  
Install the thermostat about 5 ft (1.5m) above the floor in an  
area with good air circulation at average temperature. (See  
Fig. 3.)  
Wall mounting (using standard drywall screws) is standard.  
Mounting to a 2 in.(50.8 mm) by 4 in. (101.6 mm) wiring box  
can be accomplished:  
WHEN NOT USED TO SENSE ROOM TEMPERATURE  
When using the remote-mounted temperature (and humidity)  
sensor(s) to sense ambient conditions, install the thermostat in  
an area that is accessible for setting and adjusting the  
temperature and settings.  
for a horizontal box, no extra hardware is required.  
for a vertical box, part 209651A is required.  
Mount to European standard wall box (having 60.3 mm  
[
2.4 in.] between mounting screws in a horizontal line) with  
or without adaptive hardware.  
CAUTION  
1.  
Position and level the subbase.  
Equipment Damage Hazard.  
Can damage the TIM connection beyond repair.  
Disconnect the TIM cable prior to opening or closing  
the thermostat cover.  
NOTE: A level wallplate is only for appearance. The  
thermostat functions properly when not level.  
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T7350 Commercial Programmable Thermostat  
2
3
.
.
Use a pencil to mark the mounting holes. (See Fig. 7.)  
Remove the subbase from the wall and drill two 3/16 in.  
SUBBASE  
(
4.76 mm) holes in the wall (if drywall) as marked. For  
T4  
T3  
firmer material such as plaster or wood, drill two 7/32 in.  
(
5.56 mm) holes.  
TR21  
T
TR21  
T
TR21  
T
4
.
.
Gently tap anchors (provided) into the drilled holes until  
flush with the wall.  
T
T
T
T
T
5
Position the subbase over the holes, pulling wires  
through the wiring opening.  
6
7
.
.
Loosely insert the mounting screws into the holes.  
Tighten mounting screws.  
TR21  
T
TR21  
T
TR21  
T
SUBBASE  
T
T
T4  
T3  
TR21  
T
TR21  
T
T
T
TR21  
T
TR21  
T
TR21  
T
T
T
TR21  
T
TR21  
T
T
T
M29257  
Fig. 6. Nine TR21 Sensors providing a temperature  
averaging network for T7350 Thermostat.  
M29184  
Fig. 4. Four TR21 Sensors providing a temperature  
averaging network for T7350 Thermostat.  
WIRES THROUGH WALL  
T7350 SUBBASE  
MOUNTING  
HOLES  
T4  
T3  
T4  
T3  
T4  
T3  
WALL  
ANCHORS  
(2)  
1
1
TR21-A  
TR21-A  
1
THE TR21-A IS A 10K OHM SENSOR.  
M29256  
MOUNTING  
SCREWS  
Fig. 5. Two TR-21A Sensors providing a temperature  
averaging network for T7350 Thermostat.  
M19608  
Fig. 7. Mounting the subbase.  
7
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T7350 Commercial Programmable Thermostat  
Table 4. T7350B Subbase for Two-stage Heat,  
Two-stage Cool Systems.  
Wiring  
Terminal  
CAUTION  
Electrical Shock or Equipment Damage Hazard.  
Can shock individuals or short equipment  
circuitry.  
Disconnect power supply before installation.  
Description  
RCa RC  
a 24 VAC Cooling transformer.  
IMPORTANT  
All wiring must comply with local electrical codes  
RHa RHa 24 VAC Heating transformer.  
and ordinances.  
X
X Common.  
NOTE: Maximum (and recommended) wire size is  
aux aux Conventional: Auxiliary relay or 3rd stage of  
1
8-gauge (ø 1.02 mm). Do not use wire smaller than  
2-gauge (ø 0.644 mm).  
heating or cooling.  
2
Heat Pump: Auxiliary relay or 2nd stage auxiliary.  
Follow equipment manufacturer wiring instructions when  
available. Refer to the Wiring Diagram section for typical  
hookups. A letter code is located near each terminal for  
identification. Refer to Tables 3 through 8 for terminal  
designations.  
W1 O/B Conventional: Stage 1 heating relay.  
Heat Pump: Changeover relay for heating (B) or  
b
cooling (O) .  
W2 W1 Conventional: Stage 2 heating relay.  
Heat Pump: 1st Stage auxiliary heat relay.  
1
.
Loosen subbase terminal screws and connect system  
wires.  
Y1 Y1 Conventional: Stage 1 cooling relay.  
Heat Pump: Stage 1 compressor relay.  
2.  
3.  
4.  
Securely tighten each terminal screw.  
Push excess wire back into the hole in the wall.  
Plug the hole with nonflammable insulation to prevent  
drafts from affecting the thermostat.  
Y2 Y2 Conventional: Stage 2 cooling relay.  
Heat Pump: Stage 2 compressor relay.  
AS AS Discharge Air Sensor connection (1).  
AS AS Discharge Air Sensor connection (2).  
OS OS Outdoor Air Sensor connection (1).  
OS OS Outdoor Air Sensor connection (2).  
Table 3. T7350A Subbase for Single-stage Heat,  
Single-stage Cool Systems.  
Terminal  
G
G
Fan relay.  
T3 T3 TR20 Series remote sensor connection (GND).  
T4 T4 TR20 Series remote sensor connection (Sensor).  
T5 T5 TR20 Series remote sensor connection (Set Pt).  
T6 T6 TR20 Series remote sensor connection (Bypass).  
T7 T7 TR20 Series remote sensor connection (LED).  
Description  
RCa RC  
RHa RH  
a 24 VAC Cooling transformer.  
a 24 VAC Heating transformer.  
a
Factory jumper between RC and RH for systems with one  
transformer.  
X
X
Common.  
Fan relay.  
b
G
G
For changeover functional details, see Operation section.  
aux aux Conventional: Auxiliary relay or 2nd Stage of  
heating or cooling relay.  
Heat Pump: Auxiliary relay or 1st Stage auxiliary  
heat relay.  
W1 O/B Conventional: Stage 1 heating relay.  
Heat Pump: Changeover relay for heating (B) or  
b
cooling (O) .  
Y1 Y1 Conventional: Stage 1 cooling relay.  
Heat Pump: Stage 1 compressor relay.  
a
Factory jumper between RC and RH for systems with one  
transformer.  
For changeover functional details, see Operation section.  
b
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T7350 Commercial Programmable Thermostat  
Table 5. T7350D Subbase for Three-stage Heat,  
Three-stage Cool Systems.  
Table 6. T7350H Subbase for Three-stage Heat, Three-  
stage Cool Systems with Network Communications  
Terminal  
Terminal  
Description  
Description  
RCa RC  
a 24 VAC Cooling transformer.  
RCa RCa  
RHa RHa  
24 VAC Cooling transformer.  
24 VAC Heating transformer.  
RHa RHa 24 VAC Heating transformer.  
X
X
Common.  
X
X
Common.  
aux aux Auxiliary relay.  
W1 O/B Conventional: Stage 1 heating relay.  
auxb aux  
auxb auxb  
b Auxiliary relay connection (normally open).  
Auxiliary relay connection (common).  
Heat Pump: Changeover relay for heating (B) or  
cooling (O) .  
b
W1 O/B Conventional: Stage 1 heating relay.  
Heat Pump: Changeover relay for heating (B) or  
cooling (O) .  
W2 W1 Conventional: Stage 2 heating relay.  
c
Heat Pump: 1st Stage auxiliary heat relay.  
W2 W1 Conventional: Stage 2 heating relay.  
Y1 Y1 Conventional: Stage 1 cooling relay.  
Heat Pump: Stage 1 compressor relay.  
Y2 Y2 Conventional: Stage 2 cooling relay.  
Heat Pump: 1st Stage auxiliary heat relay.  
Y1 Y1 Conventional: Stage 1 cooling relay.  
Heat Pump: Stage 1 compressor relay.  
Y2 Y2 Conventional: Stage 2 cooling relay.  
Heat Pump: Stage 2 compressor relay.  
AS AS Discharge Air Sensor connection (1).  
AS AS Discharge Air Sensor connection (2).  
OS OS Outdoor Air Sensor connection (1).  
OS OS Outdoor Air Sensor connection (2).  
Heat Pump: Stage 2 compressor relay.  
AS AS Discharge Air Sensor connection (1).  
AS AS Discharge Air Sensor connection (2).  
OS OS Outdoor Air Sensor connection (1).  
OS OS Outdoor Air Sensor connection (2).  
G
G
Fan relay.  
T3 T3 TR20 Series remote sensor connection (GND).  
T4 T4 TR20 Series remote sensor connection (Sensor).  
T5 T5 TR20 Series remote sensor connection (Set Pt).  
T6 T6 TR20 Series remote sensor connection (Bypass).  
T7 T7 TR20 Series remote sensor connection (LED).  
G
G
Fan relay.  
T3  
T4  
T5  
T6  
T7  
T3  
T4  
T5  
T6  
T7  
TR20 Series remote sensor connection (GND).  
TR20 Series remote sensor connection (Sensor).  
TR20 Series remote sensor connection (Set Pt).  
TR20 Series remote sensor connection (Bypass).  
TR20 Series remote sensor connection (LED).  
W3 W2 Conventional: Stage 3 heat or stage 4 cool relay.  
Heat Pump: 2nd Stage auxiliary heat relay.  
Conventional: Stage 3 cooling relay.  
W3 W2 Conventional: Stage 3 heat or stage 4 cool relay.  
Y3  
Heat Pump: 2nd Stage auxiliary heat relay.  
Conventional: Stage 3 cooling relay.  
HS HS Humidity Sensor connection (signal: 0-10 Vdc).  
HC HC Humidity Sensor connection (common).  
HP HP Humidity Sensor connection (power).  
M
M
Y3  
HS HS Humidity Sensor connection (signal: 0-10 Vdc).  
HC HC Humidity Sensor connection (common).  
HP HP Humidity Sensor connection (power).  
M
M
M
M
Motion Sensor connection (1).  
Motion Sensor connection (2).  
M
M
Motion Sensor connection (1).  
Motion Sensor connection (2).  
a
Factory jumper between RC and RH for systems with one  
transformer.  
For changeover functional details, see Operation section.  
ebus ebus LonWorks Bus (1).  
ebus ebus LonWorks Bus (2).  
b
a
Factory jumper between RC and RH for systems with one  
transformer.  
b
c
Floating auxiliary contact (not connected to transformer hot or  
common).  
For changeover functional details, see Operation section.  
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T7350 Commercial Programmable Thermostat  
Table 7. T7350H Subbase for Modulating Systems with  
Network Communications.  
Table 8. T7350M Subbase for Modulating Systems.  
Terminal  
Terminal  
Description  
Description  
RCa  
RHa  
24 VAC Cooling transformer.  
RCa  
RHa  
24 VAC Cooling transformer.  
24 VAC Heating transformer.  
24 VAC Heating transformer.  
X
Common.  
X
Common.  
aux  
W1  
Y1  
MX  
MH  
MC  
AS  
AS  
OS  
OS  
G
T3  
T4  
T5  
T6  
T7  
HS  
HC  
HP  
M
Auxiliary relay or 2nd stage of heating or cooling.  
Stage 1 heating relay.  
Stage 1 cooling relay.  
auxb aux  
auxb aux  
b Auxiliary relay connection (normally open).  
b Auxiliary relay connection (common).  
W1  
Y1  
MX  
MH  
MC  
AS  
AS  
OS  
OS  
G
T3  
T4  
T5  
T6  
T7  
HS  
HC  
HP  
M
Stage 1 heating relay.  
Stage 1 cooling relay.  
Modulating common.  
Modulating common.  
Modulating heating signal (4-20 mA).  
Modulating cooling signal (4-20 mA).  
Discharge Air Sensor connection (1).  
Discharge Air Sensor connection (2).  
Outdoor Air Sensor connection (1).  
Outdoor Air Sensor connection (2).  
Fan relay.  
TR20 Series remote sensor connection (GND).  
TR20 Series remote sensor connection (Sensor).  
TR20 Series remote sensor connection (Set Pt).  
TR20 Series remote sensor connection (Bypass).  
TR20 Series remote sensor connection (LED).  
Humidity Sensor connection (signal: 0-10 Vdc).  
Humidity Sensor connection (common).  
Humidity Sensor connection (power).  
Motion Sensor connection (1).  
Modulating heating signal (4-20 mA).  
Modulating cooling signal (4-20 mA).  
Discharge Air Sensor connection (1).  
Discharge Air Sensor connection (2).  
Outdoor Air Sensor connection (1).  
Outdoor Air Sensor connection (2).  
Fan relay.  
TR20 Series remote sensor connection (GND).  
TR20 Series remote sensor connection (Sensor).  
TR20 Series remote sensor connection (Set Pt).  
TR20 Series remote sensor connection (Bypass).  
TR20 Series remote sensor connection (LED).  
Humidity Sensor connection (signal: 0-10 Vdc).  
Humidity Sensor connection (common).  
Humidity Sensor connection (power).  
Motion Sensor connection (1).  
M
a
Motion Sensor connection (2).  
Factory jumper between RC and RH for systems with one  
transformer.  
M
Motion Sensor connection (2).  
ebus ebus LonWorks Bus (1).  
ebus ebus LonWorks Bus (2).  
Mounting Thermostat on Subbase  
(Fig. 8)  
a
Factory jumper between RC and RH for systems with one  
transformer.  
Floating auxiliary contact (not connected to transformer hot or  
With the subbase installed, mount the thermostat:  
1. Engage the tabs at the top of the thermostat and  
subbase.  
b
common).  
2.  
.
Swing the thermostat down.  
3
Press the lower edge of the case to latch.  
NOTE: To remove the thermostat from the wall, first  
pull out at the bottom of the thermostat; then  
remove the top.  
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T7350 Commercial Programmable Thermostat  
A. ENGAGE TABS AT TOP OF THERMOSTAT AND SUBBASE OR WALLPLATE.  
Setting System and Fan  
System default setting is Auto. Fan default setting is On.  
NOTE: Use System and Fan keys to change settings.  
System Settings  
Auto: Thermostat automatically changes between heating  
and cooling based on indoor temperature.  
Cool: Thermostat controls only cooling.  
Off: Heating, cooling, and fan are all off.  
Heat: Thermostat controls only heating.  
Em Heat: Auxiliary heat serves as first stage. Compressor  
stages are locked off.  
Fan Settings  
On: See Table .  
Auto: Fan always cycles with call for heating or cooling.  
Conventional: The equipment (i.e. plenum switch) con-  
trols fan operation in heat mode. The thermostat con-  
trols fan operation in cool mode.  
B. PRESS LOWER EDGE OF CASE TO LATCH.  
Electric Heat: The thermostat controls fan operation  
in both heat and cool modes.  
NOTE: Fan operation can extend (delay Off) after the  
heating/cooling turns off:  
Heating choices are 0 or 90 seconds.  
Cooling choices are 0 or 40 seconds.  
Table 9. Intelligent™ Fan ON control logic  
Occupancy  
Motion  
Call for Heat/Cool  
Yes No  
M19609  
Scheduled  
Effective  
Period Sensor Signal Occupancy  
Fig. 8. Mounting thermostat on subbase.  
No Sensor  
Occupied  
Occupied  
Occupied  
Standby  
Standby  
Standby  
Occupied Fan On Fan On  
Occupied Fan On Fan On  
Wired  
SETTINGS  
Motion  
Sensed  
No Motion  
Sensed  
No Sensor  
Wired  
Using Thermostat Keys  
Standby  
Standby  
Standby  
Standby  
Fan On  
Fan Offa  
The thermostat keys are used to:  
set current time and day,  
Fan On Fan Offa  
program times and setpoints for heating and cooling,  
override the program temperatures,  
display present setting,  
Motion  
Fan On Fan Offa  
Fan On Fan Offa  
Sensed  
set system and fan operation,  
perform simple configuration.  
No Motion  
Sensed  
No Sensor  
Wired  
NOTE: See Fig. 9 for keypad information.  
Not  
Not Occupied Fan On Fan Offa  
Not Occupied Fan On Fan Offa  
Not Occupied Fan On Fan Offa  
Occupied  
Setting Temperature  
Not  
Motion  
Refer to Table 2 for the default temperature setpoints. See  
Programming section for complete instructions on changing  
the setpoints.  
Occupied  
Sensed  
Not  
No Motion  
Sensed  
Occupied  
a
In heat mode, when set for conventional heat, the equipment  
i.e plenum switch) could power the fan despite the T7350.  
(
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T7350 Commercial Programmable Thermostat  
Temperature  
Set Day/Time  
Override  
Temporary Temporary  
Occupied Not Occupied  
Occupied  
Not Occupied  
HEAT  
Day  
Time  
HEAT  
COOL  
COOL  
Schedule  
System  
Fan  
Run  
Clear  
Day  
Occupied Not Occupied Start Time  
Copy  
HEAT COOL  
ON AUTO  
Schedule  
M19610  
Fig. 9. Thermostat key locations.  
INSTALLER SETUP  
For most applications, the thermostat factory settings do not  
need to be changed. Review the factory settings in Table 10.  
NOTE: When power is first applied to the thermostat, the dis-  
play will show all segments (see Fig. 10).  
Table 10. Keypad Configurable Installer Setup Optionsa.  
Configuration Option  
Degree temperature display  
Factory Default  
DEG F  
Description  
Temperature display: °F or °C  
Remote room temperature sensor  
LOC SEN  
LOC: Use Local temperature sensor.  
REM: Use Remote temperature sensor.  
Clock format  
12HRCLK  
KYLCK 0  
12HR: 12-hour clock format  
24HR: 24-hour clock format  
Keypad lockout level  
Keypad lockout enable/disable through special keypad sequence.  
0
1
2
: No lockout.  
: Lockout all keys except Temporary Occupied, Temporary Not Occupied, , and  
: Lockout all keys except  
b.  
b
.
Conventional / heat pump selection  
CONV  
RVON HT  
d
CONV: Conventional equipment.  
HT PUMP: Heat Pump.  
Heat Pump Reversing Valvec  
RVON HT: Heat pump, energize O/B on call for heat.  
RVON CL: Heat pump, energize O/B on call for cool.  
Configuration Variables  
Hexadecimal configuration code values.  
(C1,C2,C3,C4,C5,C6,C7,C8)  
The code defines only Installer Configuration.  
It sets neither Parameters (gains and setpoints) nor Schedules.  
a
b
c
d
With the exception of Temporary Not Occupied, functions not keypad configurable require a Palm OS Configuration Tool.  
Lockouts do not allow adjustments on dehumidification high limit. Special keypresses are never locked out.  
Displays only when heat pump is selected.  
Values vary depending on the model.  
NOTE: The T7350 has serial communications to facilitate use  
of an installer configuration tool. More advanced fea-  
tures are available using this tool. (See the Appendix  
for details.)  
TemporaryStandby Set Set Schedule Room  
Not Occupied12 StartTime  
AM  
PM  
%
MonTueWedThuFriSatSunHol MinsDays  
Fan  
OnAuto  
A combination of key presses are required to use the Installer  
Setup feature:  
System  
EmHeat  
OffCoolAuto Dehumid  
1.  
To enter the Installer Setup, press and hold both the Run  
Schedule and the Copy keys until DEG F (or DEG C)  
displays.  
M19611  
Fig. 10. LCD display of all segments.  
2. To advance to the next Setup item, press  
.
NOTE: Pressing Run/Copy again while in this mode  
displays the T7350 firmware version number.  
Setup Using Keypad  
The installer uses the Installer Setup to customize the  
thermostat to specific systems. (See Table 10.) The table  
includes all the configuration options available. For basic setup  
functions, the thermostat can be configured using the keypad.  
3
4
.
.
To return to a Setup item, cycle through the options.  
To change a setting, use the up  
or down key.  
5. To exit the Installer Setup, press Run Schedule.  
6.  
The display prompts SAV CFG (save configuration).  
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T7350 Commercial Programmable Thermostat  
a. If you want to save the new configuration, use the  
up  or down key to change NO to YES before  
pressing Run Schedule.  
8. Adjust each variable to match the PDA indication:  
a. Hold down the up  or down  key to adjust the  
value quickly.  
b. If you want the configuration to remain as it was  
before starting this change, ensure the display  
indicates SAV CFG NO and press Run Schedule.  
b. Tap the up  or down  key for fine control.  
9. Press  
to switch to another variable.  
10. Return to step 8 and repeat the process until all digits are  
set properly.  
NOTE: Installer Setup is automatically exited after five  
minutes with no key pressed. Upon this auto-  
matic exit, all changes are lost.  
11. To exit the Installer Setup, press Run Schedule.  
12. The display prompts SAV CFG (save configuration).  
a. If you want to save the new configuration, use the  
up  or down  key to change NO to YES before  
pressing Run Schedule.  
Setting Keypad Lockout  
b. If you want the configuration to remain as it was  
before starting this change, ensure the display  
indicates SAV CFG NO and press Run Schedule.  
Proper keypad sequences activate the lockout features. To  
change the keypad lockout state:  
1
.
Enter the Installer Setup: press and hold both the Run  
Schedule and the Copy keys until DEG F (or DEG C)  
displays.  
IMPORTANT  
1. Review the settings to confirm that they are correct  
2
3
.
.
Press  
until KYLCK displays.  
for the system.  
Use the up  or down  key to change the setting.  
2. Press Run Schedule to exit the Installer Setup.  
3. The thermostat prompts you to save configuration  
changes. Default is NO.  
Options are:  
0: No lockout.  
1: Lockout all keys except Temporary Occupied,  
Temporary Not Occupied, up , down  and  
4. Be sure to set the current day and time immediately.  
.
2: Lockout all keys except  
.
Special Functions  
NOTES:  
Options 1 and 2 do not allow adjustments on  
dehumidification high limit.  
Restore Factory Configuration (Run/Clear)  
No options lockout special keypresses. See the  
Special Functions section for details.  
IMPORTANT  
This operation erases the current configuration and  
restores the factory defaults for all configuration,  
parameters, setpoints and schedules. To regain the  
old requires device reconfiguration.  
4
.
.
Once the proper option is chosen, exit Installer Setup by  
pressing Run Schedule.  
5
The display prompts SAV CFG (save configuration). If  
you want to save it, use the up  or down  key to  
change NO to YES before pressing Run Schedule again.  
1
.
Press both Run Schedule and Clear Start Time.  
Configuration  
2. The display gives the option to restore the FAC CFG.  
a. To restore the factory defaults, press up  or  
down until the display indicates YES.  
b. To cancel this option, ensure display indicates NO.  
Press Run Schedule.  
CAUTION  
3.  
Possible Equipment Damage.  
Fan must be running when system is operating.  
Heat pump and electric heat systems must be  
configured correctly to prevent equipment damage  
caused by the system running without the fan.  
Get Factory Schedule (Info/Clear)  
Performing this operation reverts the schedules to the factory  
defaults:  
1
.
Press both Info and Clear Start Time.  
Limited configuration can be done with the keypad using the  
Configuration ID. In order to determine the proper codes to use  
for the Configuration Variables (CnfgID), spreadsheets of the  
CnfgID values are available online at http://  
2. The display gives the option to restore the FAC SCH.  
a. To restore the factory schedule, press up  or  
down until the display indicates YES.  
b. To cancel this option, ensure display indicates NO.  
3. Press Run Schedule.  
customer.honeywell.com/t7350.  
A PDA or Honeywell's TStatSpec(TM) software can be used,  
as well.  
Test Mode (Occupied/Not Occupied/  
Schedule Day)  
Follow these instructions for identifying the CnfgID values  
using TStatSpec:  
1
2
.
.
Open the TStatSpec software on your PC.  
Create a new configuration or open an existing configu-  
ration.  
CAUTION  
Possible Equipment Damage.  
3
.
.
Select the “Configuration Screen” button and configure  
the settings, as desired.  
Equipment damage can result if compressor is  
cycled too quickly.  
The minimum off time for compressors is bypassed  
during Test Mode. Equipment damage can occur if the  
compressor is cycled too quickly.  
4
Click on the “Configuration ID” button on the bottom left  
of the configuration screen.  
5.  
6.  
7.  
Make note of the values.  
Press both Copy and Run Schedule on the thermostat.  
Tap  
until C1 appears on the right end of the display.  
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T7350 Commercial Programmable Thermostat  
Use the Test Mode to check the thermostat configurations and  
operation. To start the system test:  
Save User Schedule (Info/Copy)  
Performing this operation saves the current schedule  
1.  
Press Schedule Day, Occupied and Not Occupied simul-  
taneously.  
(
including holidays) to memory, overwriting the old saved  
schedule:  
2.  
The display gives the option to TEST.  
a. To enter test mode, press up  or down  until  
the display indicates IN TEST.  
1
2
.
.
Press both Info and Copy.  
The display gives the option to SAV SHD.  
a. To save the current schedule, press up  or down  
b. To cancel this option, ensure the display indicates  
NO TEST.  
until the display indicates YES.  
b. To cancel this option, ensure display indicates NO.  
3.  
Press Run Schedule.  
3.  
Press Run Schedule.  
NOTES:  
Get User Schedule (Info/Run)  
Getting the user schedule restores the schedule (including  
holidays) from saved memory, overwriting the schedule  
currently in use:  
To verify whether or not the system test is still  
active, repeat the above process.  
The system test times out after ten minutes with no  
key pressed.  
1
2
.
.
Press both Run Schedule and Info.  
The display gives the option to GET SHD.  
a. To retrieve the saved schedule, press up  or  
down until the display indicates YES.  
b. To cancel this option, ensure display indicates NO.  
Press Run Schedule.  
3.  
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T7350 Commercial Programmable Thermostat  
Table 11. T7350 Key Function Summary.  
Definition  
Grouping  
Button  
Information Down Arrow  
Lowers setpoint, day, or time. When setting times or temperatures, hold key down to  
continuously decrease value. Also can make temporary change in temperature setpoint.  
Obtains information (where humidity “high-limit” can be set), cycles through setup options.  
Information  
Up Arrow  
Raises setpoint, day, or time. When setting times or temperatures, hold key down to  
continuously increase value. Also can make temporary change in temperature setpoint.  
Temperature Occupied  
Heat  
Sets Occupied Heat setpoint.  
Sets Occupied Cool setpoint.  
Sets Not Occupied Heat setpoint.  
Occupied  
Cool  
Not  
Occupied  
Heat  
Not  
Sets Not Occupied Cool setpoint.  
Occupied  
Cool  
Set  
Day  
Sets day of week. Tapping key with 'Set Value' segment on increases current day (same  
effect as Up Arrow key).  
Time  
Sets time.  
Tapping key with “Set Value” segment on increases time in one hour increments.  
Override  
Schedule  
Temporary  
Occupied  
Temporary occupied setting for length of time defined by installer.  
User can modify setpoints.  
Temporary Not  
Sets holiday length.  
Occupied  
User selects number of days (“0”-”99”), or “---” for continuous override.  
Day  
Selects day schedule to modify. (Used also with copy key.)  
Occupied  
Selects occupied event start times for specified day.  
Repeatedly press this key to toggle between two occupied events.  
Not Occupied  
Selects not occupied event start times for specified day.  
Repeatedly press this key to toggle between two not occupied events.  
Clear  
Clears start time for specified period and day.  
Start Time  
Copy  
Copies schedule from one day to another.  
System  
Fan  
Selects System Mode. Toggles through Em Heat, Heat, Off, Cool, and Auto modes.  
Selects fan operation mode. Toggles between On and Auto.a  
Run Schedule  
Resumes running schedule.  
Cancels Temporary (Not) Occupied action, and/or Temporary setpoint changes.  
a
Fan On: Continuous fan operation during occupied periods. During not occupied and standby periods, fan cycles with call for heat  
or cool.  
Fan Auto: Fan cycles with call for heat or cool during all periods. (See Fan Settings section for more details.)  
NOTE: The display returns to the default screen after pressing Run Schedule (or after a period of time without keypress):  
ten seconds: when returning from temporary setpoint changes, info screen, temp occ, and temp not occ.  
one minute: when returning from setting clock/day.  
ten minutes: when returning from System Checkout.  
five minutes: when returning from all other modes.  
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T7350 Commercial Programmable Thermostat  
PROGRAMMING  
The thermostat operates at the Occupied temperature setting  
until the thermostat is programmed. Table 12 shows the default  
temperature settings. (The program has four):  
Setting Current Day/Time  
This can be done using the keypad, a PDA interface or through  
TStatSpec software.  
Occupied heat.  
Occupied cool.  
IMPORTANT  
Not Occupied heat.  
Not Occupied cool.  
Once you set the day/time once, you should not need  
to set it again. As a result, once a PDA or TStatSpec  
software sets the day using calendar mode (MM/DD/  
YYYY), keypad changes to the day are not allowed.  
Table 12. Occupied and Not Occupied  
Default Temperature Settings.  
Control  
Occupied  
70° F (21° C)  
75° F (24° C)  
Not Occupied  
NOTES: To allow keypad day changes, use a PDA or  
TStatSpec as follows:  
Heating  
Cooling  
55° F (13° C)  
85° F (29° C)  
1.  
.
Go to the “Set Clock” function.  
2
Change the “Date Mode” from “MM/DD/YYYY” to  
“Day of Week”.  
Press Set.  
The thermostat can be set for two Occupied and two Not  
Occupied times for each day of the week (28 independent time  
settings). Programming Holidays provides a total of 32  
independent time settings.  
3.  
When using the keypad to change the day/time:  
1. Press Set Day until the current day is displayed.  
The Temporary Occupied key provides quick temporary  
temperature changes for increased occupant comfort. The  
Temporary Not Occupied key provides energy efficient  
operation for extended periods of time.  
NOTE: Sun = Sunday, Mon = Monday, Tue = Tuesday,  
Wed = Wednesday, Thu = Thursday,  
Fri = Friday, Sat = Saturday.  
2
3
.
.
Press Set Time.  
IMPORTANT  
Press up  or down  until the current time is  
Programming the thermostat with the keypad requires  
4 Vac (turn on system power).  
Keyboard lockout must be disabled.  
displayed.  
2
NOTE: Tapping Set Time changes the time in one hour  
increments.  
NOTE: Before starting the program procedure, use  
Table 13 to organize the program schedule.  
4.  
Press Run Schedule.  
Table 13. Occupied and Not Occupied Period Start Times.  
Setting Schedule Times  
Not  
Occupied  
Period 1  
Not  
Occupied  
Period 2  
Use the PDA, TStatSpec software, or the keys in the  
Occupied  
Period 1  
Occupied  
Period 2  
“Schedule” area of the keypad for this procedure.  
Day  
Monday  
1.  
Press Occupied.  
NOTE: Anytime a start time is not required, press Clear  
Start Time.  
Tuesday  
Wednesday  
Thursday  
Friday  
2
3
.
.
Press Day until the desired day is displayed.  
Press Occupied or Not Occupied until the proper period  
is displayed.  
4.  
Press up  or down  until the desired start time is  
displayed.  
5
6
.
.
Repeat steps 3 and 4 for a given day.  
Repeat steps 2 through 5 until finished.  
Saturday  
Sunday  
Program Holidays  
IMPORTANT  
Holidaya  
— Holidays must be first programmed with a PDA or  
through TStatSpec software.  
Day-of-Week mode forces the T7350 to ignore  
holidays.  
a
Only applies to holidays programmed with 365-day calendar  
NOTE: 12:00 PM is Noon, and 12:00 AM is Midnight.  
With holidays set, holiday schedule times can be changed  
using the keypad:  
1
.
Use the Schedule Day key to select “Hol” for Holiday  
schedule times.  
2.  
Press Occupied or Not Occupied to switch to the proper  
time period within the holiday.  
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T7350 Commercial Programmable Thermostat  
3
.
.
Press up  or down  until the desired time is  
displayed.  
3.  
4.  
The Maximum Occupied Heat Setpoint is limited  
by Occupied Cool Setpoint – 2° F (1° C).  
4
Press Run Schedule.  
The Minimum Occupied Cool Setpoint is limited by  
the Occupied Heat Setpoint + 2° F (1° C).  
IMPORTANT  
Invalid holidays are ignored.  
Programming Temperature Setpoints  
Valid holidays require valid: month, day and duration.  
Holidays such as the fifth Tuesday of a month with  
only four Tuesdays are also invalid.  
1.  
.
Press Occupied Heat.  
2
Press up  or down  until the desired  
temperature is displayed.  
3.  
Press Occupied Cool.  
Copying a Day  
4. Press up  or down  until the desired  
temperature is displayed.  
Use the PDA, TStatSpec, or keys in the “Schedule” area of the  
5
6
.
.
Press Not Occupied Heat.  
keypad for this procedure:  
Press up  or down  until the desired  
temperature is displayed.  
1
2
3
4
.
.
.
.
Press Occupied.  
Press Day to select the day to be copied.  
Press Copy.  
7
8
.
.
Press Not Occupied Cool.  
Press up  or down  until the desired  
temperature is displayed.  
Press Copy again. The following day is automatically  
selected. (For example: If the day to be copied is Mon-  
day, Tuesday will automatically be selected.)  
If necessary, press Day until the day to receive the copy  
is displayed.  
9.  
Press Run Schedule.  
5.  
Temperature Setpoint Overrides  
NOTE: To cancel the copy press Run Schedule before  
IMPORTANT  
step 6.  
The setup determines the duration of Occupied  
overrides.  
6.  
Press Copy.  
Default duration is three hours.  
NOTE: DONE displays for two seconds then the  
program display reappears.  
NOTE: To cancel the Override and immediately return to the  
program, press Run Schedule.  
7
8
.
.
Repeat steps 2 through 6 for all the days desired.  
TR23 Setpoint Knob  
Press Run Schedule.  
A TR23 setpoint knob can remotely adjust the T7350 setpoint.  
Adjustment can be made with the sensor in override.  
Clearing Program Start Times  
1.  
Press Occupied or Not Occupied until the start period to  
be cleared is displayed.  
NOTES:  
During override, only occupied and standby heat  
setpoints, and cool setpoints are adjusted.  
The maximum adjustment is ±5° F (3° C).  
With a disconnected or failed TR23, or a T7350  
not set for remote+setpoint, offset is zero.  
2.  
3.  
4.  
Press Day until desired day is displayed.  
Press Clear Start Time.  
Repeat steps 1 through 3 for all the start times to be  
cleared.  
5.  
Press Run Schedule.  
T7771 Setpoint Button  
Temperature Setpoints  
A T7771 setpoint button can remotely adjust the T7350  
setpoint. Adjustment can be made with the sensor in override.  
Setpoint Limits  
NOTES:  
The setpoint temperature range is 40°F to 90°F (4°C to 32°C)  
During override, only occupied and standby heat  
setpoints, and cool setpoints are adjusted.  
The maximum adjustment is ±3° F (2° C).  
With a disconnected or failed T7771, or a T7350  
not set for remote+setpoint, offset is zero.  
for heating and 45°F to 99°F (7°C to 37°C) for cooling.  
NOTES: The ranges mentioned can be limited based upon set-  
points and stops:  
1
.
The greater of the Minimum Heat Stop and the Not  
Occupied Heat setpoints determines the  
lowest setting to which the occupied heat setpoint  
can be adjusted:  
Changing Temperature Setpoint Until Next  
Program Period  
This is a simple change to perform even with the door closed:  
1. Press up  or down  until the desired  
temperature is displayed.  
°
F: Stop/NotOcc  OccHeat  (OccCool - 2).  
C: Stop/NotOcc  OccHeat  (OccCool - 1).  
°
2.  
The lesser of the Maximum Cool Stop and Not  
Occupied Cool setpoints determines the highest  
setting to which the occupied cool setpoint can be  
adjusted:  
NOTE: If done while in Standby or Not Occupied mode,  
Temporary Occupied override engages  
°F: Stop/NotOcc  OccCool  (OccHeat + 2).  
C: Stop/NotOcc  OccCool  (OccHeat + 1).  
°
2. The temporary temperature appears for approximately  
ten seconds, then the room temperature is displayed.  
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T7350 Commercial Programmable Thermostat  
NOTES:  
Using Temporary Occupied Override  
The Temporary Occupied Override can be used when the  
T7350 is in Not Occupied or Standby mode. It switches to the  
Occupied mode for a fixed number of hours.  
If the number of days is set to zero, no temporary  
change takes effect.  
If the number of days is set just below zero, the  
display for days is “---” (an indefinite override).  
To turn off this override, you must press Run  
Schedule.  
1.  
To use the default occupied override, press Temporary  
Occupied.  
1
2
.
.
Press Temporary Not Occupied.  
NOTE: The default temperature setting is the  
Occupied setpoint.  
Press up  or down  to change the duration of the  
Not Occupied period (in days).  
2.  
To select a temperature setting other than the default,  
press up  or down  until the desired temperature  
offset is displayed (range is 0° F to 3° F [0° TO 2° C]).  
NOTE: The default temperature setting is the  
Not Occupied setpoint.  
3.  
Press  
to display the default setpoint.  
NOTE: This offset can be restricted by the limits  
detailed in the Setpoint Limits section.  
NOTE: The only way to change this setpoint is to  
change the Not Occupied setpoint.  
Using Temporary Not Occupied Override  
The Temporary Not Occupied Override fixes the device to  
operate in Not Occupied mode for a number of days (between  
1
and 99) without changing programming saved in memory.  
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T7350 Commercial Programmable Thermostat  
OPERATION  
NOTE: The O/B terminal can be configured to operate as a  
typical B terminal (powered on call for cool).  
Startup Operation  
Upon initial thermostat powerup, a startup and initialization  
program begins. This startup occurs only on initial powerup.  
After total loss of power for an extended period, the current  
time and day can be lost (requiring reset). However, the  
thermostat retains the user program.  
Emergency Heat  
(
select T7350 Thermostats only)  
With the system set for Em Heat, auxiliary heat serves as  
stage one; compressor stages are locked off. The fan cycles  
with the auxiliary heat.  
NOTE: With no program set, the thermostat controls to the  
Occupied default setpoints of 70°F (21°C) for heat  
and 75°F (24°C) for cool.  
Equipment Protection  
T7350 Relay Logic  
As part of the operational sequence, the T7350  
All T7350 model thermostats contain four switching relays. In  
conventional applications, the relays control first stage cooling,  
first stage heating, fan, and auxiliary. In heat pump  
applications, the relays control the heat pump compressor,  
changeover, fan, and emergency heat.  
microprocessor incorporates cycle rate, and minimum on and  
off times for all heating and cooling stages. This extends  
equipment life as it prevents rapid cycling of equipment.  
NOTE: Minimum on and off times are fixed.  
NOTE: Models T7350B,D, T7350H1009 have subbases with  
more relays to accommodate extra stages.  
Cycle Rates  
The thermostat control algorithm maintains the temperature by  
cycling stages of heating or cooling to meet setpoint. Cycle  
rates, in cycles per hour (cph) are set using a PDA or  
TStatSpec software.  
Logic with Modulating Outputs  
(
T7350H1017, M, only)  
The specific relay logic depends on whether or not staging is  
NOTE: Defaults are: heat: 6cph, cool: 3cph.  
employed. See Table 14.  
NOTE: The modulating outputs always provide a signal.  
P+I+D Control  
The T7350 microprocessor-based control requires that the  
user understands temperature control and thermostat  
performance. A conventional electromechanical or electronic  
thermostat does not control temperature precisely at setpoint.  
Typically, there is an offset (droop) in the control point as the  
system load changes. This is a phenomenon that most people  
in the industry know and accept.  
Table 14. T7350 Modulating Relay Logic Exceptions.  
Relay Action  
Modulating  
Heat/  
Outputa  
Stages Cool  
On  
Fan  
On  
0
Output reaches 10%: On  
Output falls below 5%: Off  
(
1 to 100  
percent)  
1
or 2  
Staged On/Off matches equipment  
IMPORTANT  
Cycling stage operation  
P+I+D (Loop Tuning) parameters are optimized for  
proper operation of a vast majority of HVAC systems.  
Only when completely certain of necessary and  
proper changes should you alter these values.  
Improper changes result in poor system performance  
and equipment problems such as compressor short  
cycling. Other problems include wide swings in space  
temperature and excessive overdriving of modulating  
outputs.  
Off  
0,1, or 2 Off  
Off  
(
a
0 percent)  
See Table 15 for modulating output signal details.  
To display the status of the modulating outputs:  
1
2
.
.
Cycle through information displays using the info key.  
The device displays a percentage value for each output:  
a. MODHEAT on one screen.  
b. MODCOOL on another screen.  
All adjustments to Loop Tuning parameters should be gradual.  
After each change, allow the system to stabilize to accurately  
observe the effects of the change. Then, as needed, make  
further refinements until the system operates as desired.  
Table 15. Modulating Output Signal.  
Action  
0 percent  
4 mA  
20 mA  
100 percent  
20 mA  
4 mA  
If adjustment of PID parameters is required, use the following:  
Direct  
Reverse  
NOTE: In the items that follow, the term “error” refers to the  
difference between the measured space temperature  
and the current actual space temperature setpoint:  
O/B Terminal for Heat or Cool  
Changeover  
The Throttling Range (TR), also called Proportional Gain,  
determines the impact of the error on the output signal.  
Decreasing TR amplifies the error effect; that is, for a given  
error, smaller TR causes higher output signal.  
The O/B terminal controls heat pump changeover. The default  
operation is for the terminal to be powered when calling for  
heat (or while the most recent call was for heat). This  
corresponds to a typical O terminal.  
— The Integral Time (IT), also called Integral Gain,  
determines the impact of the error-over-time on the output  
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T7350 Commercial Programmable Thermostat  
signal. Error-over-time has two components making up its  
value: amount of time the error exists; and size of the error.  
The higher the IT, the slower the control response. In other  
words, a decrease in IT causes a more rapid change to the  
output signal.  
Other setpoint changes use a setpoint step  
change.  
Recovery Ramping for Heat Pump Systems  
During recovery with heat pump equipment, the heating  
setpoint is split into a heat pump setpoint for compressors, and  
two auxiliary heat setpoints for the auxiliary heat stages. (See  
Fig. 12 for the various setpoints.)  
The Derivative Time (DT), also called Derivative Gain,  
determines the impact of the error rate on the output signal.  
The error rate is how fast the error value changes. It can  
also be the direction the space temperature is going, either  
toward or away from the setpoint, and its speed—rapid or  
slow. A decrease in DT causes, for a given error rate, a  
greater effect on output signal.  
HEAT PUMP SETPOINT  
(FOR COMPRESSORS)  
OCCUPIED  
SETPOINT  
Recovery Ramping Logic  
NORMAL  
RECOVERY RAMP  
The T7350 incorporates a ramping feature that gradually  
changes the space setpoints. During recovery operation, the  
setpoint changes at a rate in degrees per hour depending on  
the outdoor air temperature. If there is no outdoor air  
AUX HEAT  
STAGE 2 RAMP  
NOT OCCUPIED  
SETPOINT  
AUX HEAT  
STAGE 1 RAMP  
temperature sensor available, the minimum ramp rate is used.  
SPACE  
TEMPERATURE  
When recovering in heating, the control point raises gradually,  
maximizing the use of the more economical first stage heat to  
bring the sensed temperature to the desired comfort setpoint.  
This minimizes using the typically more expensive later  
stage(s) of heat.  
RECOVERY TIME  
OCCUPIED  
TIME  
M19877  
NOTE: See Fig. 11 for a pictorial representation of the heat  
ramp rate determination.  
Fig. 12. Heat setpoint ramping for heat pump systems.  
Heat pump ramping for heating proceeds as follows:  
1
.
The heat pump setpoint begins to ramp until the room  
temperature and the compressor ramp intersect.  
At this point, the heat pump setpoint performs a step  
change to the Occupied (or Standby) setpoint and all  
auxiliary heat stages are disabled.  
Recovery Ramping for Conventional  
Systems  
2.  
HEAT RECOVERY  
RAMP RATE  
(
DEGREES/HOUR)  
NOTE: The heat pump setpoint remains here for the  
rest of the Not Occupied period.  
MaxHtRamp  
3
.
The stage one auxiliary heat ramp is calculated based on  
a steeper slope starting 1° F (0.5° C) below the not occu-  
pied setpoint.  
4
.
.
When the room temperature intersects this auxiliary heat  
ramp, the first stage of auxiliary heat is enabled.  
The stage two auxiliary heat ramp is calculated based on  
an even steeper slope starting 2° F (1° C) below the not  
occupied setpoint.  
5
MinHtRamp  
6.  
When the room temperature intersects this auxiliary heat  
ramp, the second stage of auxiliary heat is enabled.  
OUTDOOR AIR  
TEMPERATURE  
OaTempMinHtRamp  
OaTempMaxHtRamp  
During the cool recovery period, the setpoint changes at a rate  
in degrees per hour relative to the outdoor air temperature. If  
there is no outdoor air temperature sensor available, the  
minimum ramp rate is used.  
M10109A  
Fig. 11. Heat setpoint ramping for conventional systems.  
NOTES:  
See Fig. 13 for the various setpoints.  
Recovery ramping applies between scheduled  
heat or cool setpoint changes from not occupied to  
standby and not occupied to occupied.  
NOTE: For cooling, the same method is used in both  
conventional and heat pump systems.  
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T7350 Commercial Programmable Thermostat  
Relay for Time-Of-Day (Table 16)  
COOL RECOVERY  
RAMP RATE  
Time-of-day (TOD) is the Auxiliary Relay default configuration.  
TOD logic operates strictly according to programming:  
(
DEGREES/HOUR)  
Occupied: Relay contacts closed.  
Not Occupied: Relay contacts open.  
Standby (Scheduled): Relay contacts open.  
MaxClRamp  
Relay for Economizers  
Mechanical cooling is often used with outside temperatures in  
the 50°F (10°C) to 60°F (16°C) range and humidity below 50  
percent. In central and northern climates, hundreds of hours  
fall into this temperature category. By permitting 80 to 100  
percent outside air into the system, mechanical cooling may  
not be needed at all, particularly during Spring and Fall.  
MinClRamp  
OUTDOOR AIR  
TEMPERATURE  
Economizers take advantage of outside air. The typical  
economizer consists of an outside air damper, motor, outdoor  
air changeover control and a minimum position potentiometer.  
The motor controls the dampers. Suitability of the outside air  
for cooling is determined by the outdoor air changeover  
control. The potentiometer adjusts the minimum position of the  
economizer dampers, which provide a minimum amount of  
fresh air for ventilation.  
OaTempMinClRamp  
OaTempMaxClRamp  
M10111A  
Fig. 13. Setpoint ramping parameters with ramp rate  
calculation.  
NOTE: The setpoint used during the cool recovery period is  
similar to the heat mode in Fig. 11, except the slope of  
the line reverses for cooling.  
The economizer reduces compressor run time, thereby saving  
energy and extending compressor life. The drawback to using  
the economizer is that during the Not Occupied period, if there  
is no call for cool or outdoor air is not suitable for free cooling,  
the economizer is controlled to minimum position. This position  
allows some percentage of outdoor air to enter the building,  
regardless of air suitability. The situation can cause the heating  
or cooling to run more often than when only suitable air is  
permitted to enter the building.  
Advantages:  
Comfort setting is achieved at the programmed time and  
maintained regardless of weather conditions; occupants are  
comfortable.  
Drafts from low-temperature discharge air are minimized  
during Occupied periods.  
Use of the more economical first stage of heat is maximized  
during recovery, minimizing use of the expensive later heat  
stage(s).  
The T7350 can take advantage of an economizer by closing  
the auxiliary relay contacts to control the economizer minimum  
position potentiometer. (See Table 16 for details.)  
Comfort and energy savings can be achieved in both  
heating and cooling.  
Heat cycling reduced, extending equipment life.  
Powered: Allows normal economizer operation.  
Unpowered: Disables the economizer minimum position.  
The lack of power causes the economizer to drive dampers  
fully closed instead of staying at minimum open position.  
This reduces the possibility of unsuitable outdoor air  
entering the building, which lowers the internal load on the  
HVAC system and saves additional energy.  
Auxiliary Relay  
The auxiliary relay can be used with a variety of controls:  
Time-of-day (TOD).  
Economizer minimum position control.  
Dehumidification (see Dehumidification section).  
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T7350 Commercial Programmable Thermostat  
T7350A,B,D,M SUBBASE  
AUX  
Table 16. Auxiliary Relay Logic (Economizer and TOD)  
Occupancy  
Auxiliary Contacts  
TO  
LOAD  
Motion  
Sensor  
Signal  
RH  
AUXILIARY  
RELAY  
Scheduled  
Period  
Effective  
Economizer  
TOD  
Occupancy  
Occupied  
Occupied  
Standby  
CONTACT  
X
1
No  
Closedb  
Occupied Sensor  
Wired  
Closed  
Closed  
1
RELAY REQUIRED (R8222 OR SIMILAR).  
M19613  
Motion  
Closedb  
Occupied  
Fig. 14. Using T7350A,B,D,M models with an external relay  
with loads greater than 1.5A).  
Sensed  
(
No  
Occupied Motion  
Sensed  
Open; Closed  
only during calls Open  
a
for cool  
T7350H SUBBASE  
AUX  
No  
Open; Closed  
Standby  
Standby  
Standby  
Sensor  
Wired  
Standby  
Standby  
Standby  
only during calls Open  
TO  
LOAD  
a
for cool  
AUX  
AUXILIARY  
RELAY  
CONTACT  
Open; Closed  
Motion  
only during calls Open  
RH  
X
Sensed  
a
for cool  
1
No  
Open; Closed  
Motion  
Sensed  
only during calls Open  
a
for cool  
1
RELAY REQUIRED (R8222 OR SIMILAR).  
M22487  
No  
Open; Closed  
Not  
Not  
Sensor  
Wired  
only during calls Open  
Fig. 15. Using T7350H models with an external relay  
powered from thermostat transformer.  
Occupied  
Occupied  
a
for cool  
Open; Closed  
Not  
Motion  
Not  
only during calls Open  
T7350H SUBBASE  
Occupied Sensed  
Occupied  
a
for cool  
AUX  
No  
Not  
Open; Closed  
Not  
Motion  
only during calls Open  
TO  
LOAD  
Occupied  
Sensed  
Occupied  
a
AUX  
for cool  
AUXILIARY  
RELAY  
CONTACT  
1
a
b
Unless otherwise, noted, Economizer logic ignores calls for  
heat. The Economizer relay will be energized during calls for  
cooling.  
With fan set to AUTO and call for neither heat nor cool, the  
relay is open in order to disable damper minimum position.  
L2  
L1  
2
(
HOT)  
1
2
RELAY REQUIRED (R8222 OR SIMILAR).  
AUXILIARY  
POWER SUPPLY. PROVIDE DISCONNECT MEANS TRANSFORMER  
AND OVERLOAD PROTECTION AS REQUIRED.  
M22488  
Fig. 16. Using T7350H models with an external relay  
powered from an auxiliary transformer.  
Other Uses for the Auxiliary Relay  
Examples of other uses of the auxiliary relay are hot water  
heaters, lighting, or baseboard heat. The additional loads are  
connected to the auxiliary relay contacts on the subbase. The  
contacts are rated for 1.5A at 30 Vac, but can be adapted to  
higher current applications using an external relay.  
Default Auxiliary Relay Operations  
(
T7350D, T7350H1009 only)  
Unless configured as a stage of heating or cooling, terminals  
W2, W3, and Y3 operate for specific auxiliary functions. Each  
output takes on different auxiliary functions depending on  
configuration for Conventional or Heat Pump operation. See  
Table 17 for details.  
(See Fig. 14 through 16.)  
NOTE: The default functions cannot be modified. They are  
limited to firmware version 1.3.0 or higher.  
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Table 17. Default Auxiliary Relay Operations.  
Contact Not Used  
Heat Pump or  
Conventional as Heat or Cool Stage  
Contact Configuration of Contact Not Used as Stage  
Heat Pump  
Y3 not  
Simple  
Simple  
Time of Day  
Time of Day  
a
a
a
a
Dehumidification  
Dehumidification  
W2 not aux heat  
W3 not  
Economizer  
Simple  
Time of Day  
Simple  
Dehumidification  
Time of Day  
Simple  
Dehumidification  
Economizer  
Simple  
Dehumidification  
Time of Day  
Simple  
Dehumidification  
Economizer  
Time of Day  
Conventional  
Dehumidificationa  
Economizer  
Simple  
a
Y3 not (W3 not)  
Y3 not (W3 used)  
Economizer  
Time of Day  
a
a
Dehumidification  
Hot Gas Bypass  
Simple  
Auxiliary Contact Configurationb:  
Time of Day  
Economizer  
a
Dehumidification Dehumidification  
a
b
Simple dehumidification uses a normally closed contact. The relay is closed when humidity is below the high limit. When the  
humidity is above the high limit, the contact is open.  
The PDA configuration tool output screen displays available Auxiliary Relay functions based on this configuration.  
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The T7350H1017, T7350M do not support the  
Reheat method.  
Dehumidification (T7350D,M,H only)  
There are five methods through which the T7350 can control  
for dehumidification. Three of them modify the control  
algorithm, thus providing limited dehumidification through  
cooling. The other two use the auxiliary output to control  
another device.  
RESET TEMP SETPT  
The room temperature set point resets to a specified number of  
degrees below the actual set point when room relative humidity  
(
RH) rises above humidity high limit.  
IMPORTANT  
Though this may not technically reduce RH, it reduces the dew  
point to provide the customer with a sense of comfort due to a  
lower temperature setting in the room.  
Configurable only with a PDA, TStatSpec software, or  
a network tool such as LonSpec or CARE.  
NOTE: The dehumidification high limit can be set within the  
range of 10 to 90 percent relative humidity.  
As long as RH stays above humidity high limit, this set point is  
maintained.  
NOTE: Hysteresis and a minimum timer prevent the set point  
from short interval alternation (between standard and  
reset set points).  
Control Through Cooling  
Configure using some combination of the following:  
Minimum On.  
Reheat.  
Options Utilizing Auxiliary Output  
Reset.  
There are two dehumidification options that utilize the auxiliary  
output. They are:  
NOTES:  
Simple Dehumidification.  
These methods operate only during cooling.  
Selecting both Reheat and Reset can cause  
frequent setpoint adjustments. This selection  
is not recommended.  
Hot Gas Bypass Dehumidification.  
SIMPLE DEHUMID(IFICATION)  
The auxiliary output:  
MIN ON TIME  
— Energizes when RH rises above humidity high limit.  
De-energizes when RH drops below humidity high limit.  
Dehumidifies by increasing the compressor minimum on time  
(
normally 3 minutes) by a programmable amount. This is useful  
NOTES:  
with oversized systems in that it forces the coils to cool to a  
point where dehumidification can occur.  
Hysteresis and a minimum timer prevent short  
cycling of this output.  
Unlike Dehumid Hot Gas BP the relay remains  
energized during calls for multiple cooling stages.  
NOTES:  
Can force wider temperature swings by cooling  
when setpoint control does not require it.  
The minimum on time can be set within the range  
of 5 to 15 minutes.  
DEHUMID HOT GAS BP  
The auxiliary output operates as shown in Table 18.  
Hysteresis and a minimum timer are used to  
ensure this behavior does not change with every  
equipment cycle.  
Table 18. Hot Gas Bypass Dehumidification Logic.  
Humidity  
High  
High  
Cooling Stages Active  
more than one  
one or less  
Auxiliary Output  
De-energized  
Energized  
REHEAT  
Dehumidifies by operating cooling during typical off time. The  
T7350 maintains the proper setpoint by running the heat at the  
same time.  
Low  
Low  
more than one  
one or less  
De-energized  
De-energized  
IMPORTANT  
At times during Reheat dehumidification, the T7350  
operates heating and the cooling simultaneously. This  
is normal.  
Auxiliary output during call for multiple cooling stages for two  
reasons:  
1.  
This method assumes that the cooling provides dehu-  
midification.  
NOTES:  
2.  
Multiple cooling stages probably provide necessary  
dehumidification.  
The heat stage never energizes during Reheat if  
more than one cool stage is on.  
Reheat mode cannot occur during heating.  
NOTE: Hysteresis and a minimum timer prevent short cycling  
of this output.  
63-2605—06  
24  
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T7350 Commercial Programmable Thermostat  
TROUBLESHOOTING GUIDE (TABLE 19)  
Table 19. Troubleshooting Information.  
Possible Cause  
Display will not come on. Thermostat is not being powered.  
Symptom  
Action  
Check that X terminal is connected to the system  
transformer.  
Check for 24 Vac between X and RH or RC terminals.  
If missing 24 Vac:  
Check if circuit breaker is tripped; if so, reset circuit  
breaker.  
Check if system fuse is blown; if so, replace fuse.  
Check if the HVAC equipment power switch is in the Off  
position; if so, set to the On position.  
Check wiring between thermostat and HVAC  
equipment. Replace broken wires and tighten loose  
connections.  
If 24 Vac is present, proceed with troubleshooting.  
Temperature display is  
incorrect.  
Room temperature display has been  
recalibrated.  
Use PDA configuration software or TStatSpec software to  
recalibrate as desired.  
Thermostat is configured for °F or °C  
Press both Run Schedule and Copy, then reconfigure the  
display.  
display.  
Bad thermostat location.  
Relocate the thermostat.  
Display shows three dashes and a degree T7350 is set for remote sensing and sensor is missing or  
sign (all systems shut down).  
circuit is either open or shorted.  
Check the temperature setpoints:  
Temperature settings will Upper or lower temperature limits were  
not change.  
reached.  
Heating limits are 40° to 90° F (7° to 31° C)  
Cooling limits are 45° to 99° F (9° to 37° C)  
(
Example: Cannot set  
heating higher or cooling  
lower.)  
Occupied setpoint temperature range  
stops were configured.  
Using a PDA or TStatSpec software, check setpoint stops.  
If necessary, reconfigure the stop(s).  
Keypad is locked. When a locked key is  
pressed, LOCKED appears momentarily  
on the LCD.  
Use PDA (Set, Display) or TStatSpec software to  
unlock keypad.  
Press both Run Schedule and Copy, then change  
keypad lock level.  
Room temperature is out Remote temperature sensing is not  
Check all remote sensors.  
of control.  
working.  
Heat will not come on.  
No power to the thermostat.  
Check that X terminal is connected to the system  
transformer.  
Check for 24 Vac between X and RH terminals.  
If missing 24 Vac:  
Check if circuit breaker is tripped; if so, reset circuit  
breaker.  
Check if system fuse is blown; if so, replace fuse.  
Check if the HVAC equipment power switch is in the Off  
position; if so, set to the On position.  
Check wiring between thermostat and HVAC  
equipment. Replace broken wires and tighten loose  
connections.  
If 24 Vac is present, proceed with troubleshooting.  
Thermostat minimum off time is activated.  Wait up to five minutes for the system to respond.  
Use PDA or TStatSpec software to configure heating  
response.  
System selection is set to Off or Cool.  
Set system selection to Heat or Auto.  
DAT high limit has been reached, or  
If the setpoints are correct, do nothing.  
OAT lockout is engaged.  
Use PDA (Heating Config) or TStatSpec software to  
adjust or disable DAT high limit and/or OAT lockout.  
Check HVAC equipment to ensure proper operation.  
25  
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T7350 Commercial Programmable Thermostat  
Table 19. Troubleshooting Information. (Continued)  
Possible Cause  
Cooling will not come on. No power to the thermostat.  
Symptom  
Action  
Check that X terminal is connected to the system  
transformer.  
Check for 24 Vac between X and RC terminals.  
If missing 24 Vac:  
Check if circuit breaker is tripped; if so, reset circuit  
breaker.  
Check if system fuse is blown; if so, replace fuse.  
Check if the HVAC equipment power switch is in the Off  
position; if so, set to the On position.  
Check wiring between thermostat and HVAC  
equipment. Replace broken wires and tighten loose  
connections.  
If 24 Vac is present, proceed with troubleshooting.  
Thermostat minimum off time is activated.  Wait up to five minutes for the system to respond.  
Use PDA or TStatSpec software to configure cooling  
response.  
System selection is set to Off or Heat.  
Set system selection to Cool or Auto.  
DAT low limit has been reached, or  
If the setpoints are correct, do nothing.  
OAT lockout is engaged.  
Use PDA (Cooling Config) or TStatSpec software to  
adjust or disable DAT low limit and/or OAT lockout.  
Check HVAC equipment to ensure proper operation.  
System indicator (flame: The call for heat or cool is not yet given.  
heat, snowflake: cool) is  
Check if any stage indicators (dots next to the system  
indicator) are displayed. With no display of stage  
indicators, no call for cool/heat via relay is yet given.  
For T7350M models only: Check the information screens.  
MODHEAT or MODCOOL percentages of zero and 100  
indicate an extreme signal from the given terminal. See  
Table 15 for details.  
displayed, but no warm or  
cool air is coming from  
the registers.  
Conventional heating equipment turns the Wait one minute after seeing the on indicator and then  
fan on only after the furnace has warmed check the registers.  
to a setpoint.  
Heating or cooling equipment is not  
Verify operation of heating or cooling equipment in Test  
operating.  
Mode.  
63-2605—06  
26  
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T7350 Commercial Programmable Thermostat  
WIRING DIAGRAMS (FIG. 17-25)  
SUBBASE  
X
RH RC AUX W1  
2
Y1  
G
HEAT  
FAN  
RELAY 1  
RELAY  
COMPRESSOR  
CONTACTOR 1  
HEAT  
RELAY 2  
L2  
1
L2  
L1  
1
L1  
(
HOT)  
(HOT)  
HEATING  
TRANSFORMER  
COOLING  
TRANSFORMER  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.  
M19764A  
Fig. 17. Typical hookup of T7350A in two-stage heat and one-stage cool conventional system  
with two transformers.  
TR23 REMOTE SENSOR  
OUTDOOR  
AIR  
SENSOR  
COMPRESSOR  
CONTACTOR 2  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
HEAT  
RELAY 2  
SUBBASE  
T5  
T6  
T7  
T4  
T3 OS  
OS  
AS  
X
AS  
W2  
Y1  
Y2  
G
RH RC AUX W1  
2
HEAT  
RELAY 1  
FAN  
RELAY  
COMPRESSOR  
CONTACTOR 1  
3
ECONOMIZER  
L2  
L1  
L2  
L1  
1
1
(
HOT)  
(HOT)  
HEATING  
TRANSFORMER  
COOLING  
TRANSFORMER  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
M32140  
Fig. 18. Typical hookup of T7350B in two-stage heat and two-stage cool conventional system  
with two transformers.  
27  
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T7350 Commercial Programmable Thermostat  
TR23 REMOTE SENSOR  
OUTDOOR  
AIR  
SENSOR  
AUX HEAT  
STAGE 1  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
COMPRESSOR  
CONTACTOR 2  
SUBBASE  
T5  
T6  
T7  
T4  
T3  
OS  
OS  
AS  
X
AS  
W2  
Y2  
G
RH RC AUX O/B Y1  
2
CHANGE  
OVER  
FAN  
RELAY  
COMPRESSOR  
CONTACTOR 1  
3
L2  
L2  
L1  
1
ECONOMIZER  
1
L1  
HOT)  
(
(HOT)  
HEATING  
TRANSFORMER  
COOLING  
TRANSFORMER  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
M32142  
Fig. 19. Typical hookup of T7350B in three-stage heat and two-stage cool heat pump system  
with two transformers.  
TR23-H REMOTE SENSOR  
OUTDOOR  
AIR  
SENSOR  
4
COMPRESSOR  
CONTACTOR 2  
ECONOMIZER  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
HEAT  
RELAY 3  
HEAT  
RELAY 2  
SUBBASE  
T5  
T6  
T7  
T4  
T3  
OS  
M
OS  
M
AS  
X
AS AUX W3/Y4 Y3  
RH RC AUX W1  
W2  
Y1  
Y2  
G
HS  
HC  
HP  
COMPRESSOR  
CONTACTOR 3  
3
HEAT  
RELAY 1  
FAN  
RELAY  
HUMIDITY  
SENSOR  
MOTION  
SENSOR  
COMPRESSOR  
CONTACTOR 1  
L2  
L1  
1
2
(
HOT)  
1
2
3
4
5
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.  
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
NO NEED TO WIRE HC TERMINAL BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED  
TO TERMINAL 1 COMMON AT THE SENSOR.  
M29255  
Fig. 20. Typical hookup of T7350D in three-stage heat and three-stage cool conventional system with one transformer.  
63-2605—06  
28  
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T7350 Commercial Programmable Thermostat  
TR23-H REMOTE SENSOR  
OUTDOOR  
AIR  
SENSOR  
HEAT  
RELAY 2  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
COMPRESSOR  
COMPRESSOR  
CONTACTOR 2  
CONTACTOR 4  
W3/Y4 Y3  
SUBBASE  
T5  
T6  
T7  
T4  
T3  
OS  
M
OS  
M
AS  
X
AS  
W2  
Y1  
Y2  
G
HS  
HC  
HP  
RH RC AUX W1  
COMPRESSOR  
CONTACTOR 3  
5
3
HEAT  
RELAY 1  
FAN  
RELAY  
HUMIDITY  
SENSOR  
MOTION  
SENSOR  
COMPRESSOR  
CONTACTOR 1  
4
L2  
L1  
1
2
ECONOMIZER  
(
HOT)  
1
2
3
4
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.  
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
5
WHEN USING THE TR23-H FOR HUMIDITY SENSING THERE IS NO NEED TO WIRE HC TERMINAL  
BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1  
COMMON AT THE SENSOR.  
M29254  
Fig. 21. Typical hookup of T7350D in two-stage heat and four-stage cool conventional system.  
TR23-H REMOTE SENSOR  
4
OUTDOOR  
AIR  
SENSOR  
COMPRESSOR  
CONTACTOR 2  
ECONOMIZER  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
HEAT  
RELAY 3  
HEAT  
RELAY 2  
SUBBASE  
T5  
T6  
T7  
T4  
T3 OS  
OS  
M
AS  
X
AS AUX W3/Y4 Y3  
RH RC AUX W1  
W2  
Y1  
Y2  
G
EB  
EB  
HS  
HC  
HP  
M
COMPRESSOR  
CONTACTOR 3  
5
LONWORKS®  
3
HEAT  
RELAY 1  
HUMIDITY  
SENSOR  
MOTION  
SENSOR  
FAN  
RELAY  
BUS  
LONWORKS®  
BUS  
COMPRESSOR  
CONTACTOR 1  
L2  
L1  
1
2
(
HOT)  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.  
2
3
4
5
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
WHEN USING THE TR23-H FOR HUMIDITY SENSING THERE IS NO NEED TO WIRE HC TERMINAL  
BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1  
COMMON AT THE SENSOR  
M32145  
Fig. 22. Typical hookup of T7350H1009 in three-stage heat and three-stage cool conventional system with one  
transformer.  
29  
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T7350 Commercial Programmable Thermostat  
TR23-H REMOTE SENSOR  
OUTDOOR  
MODULATING  
R
X
AIR  
COOL  
SENSOR  
+
(4-20 mA)  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
MODULATING  
R
X
HEAT  
+
(4-20 mA)  
SUBBASE  
T5  
T6  
T7  
T4  
T3 OS  
OS  
M
AS  
X
AS  
MX MH MC  
AUX  
EB  
EB  
HS  
HC  
HP  
M
RH RC AUX W1  
2
Y1  
G
4
®
LONWORKS  
HEAT  
RELAY 1  
FAN  
HUMIDITY  
SENSOR  
MOTION  
SENSOR  
BUS  
RELAY  
®
LONWORKS  
BUS  
COMPRESSOR  
CONTACTOR 1  
3
L2  
1
L2  
L1  
ECONOMIZER  
1
L1  
(HOT)  
(HOT)  
HEATING  
TRANSFORMER  
COOLING  
TRANSFORMER  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
4
WHEN USING THE TR23-H FOR HUMIDITY SENSING THERE IS NO NEED TO WIRE HC TERMINAL  
BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1  
COMMON AT THE SENSOR.  
M32144  
Fig. 23. Typical hookup of T7350H1017 for system with two independent heat stages (one modulating),  
two independent cool stages (one modulating), and two transformers.  
TR23-H REMOTE SENSOR  
OUTDOOR  
AIR  
SENSOR  
MODULATING  
R
X
+
COOL  
5
(4-20 mA)  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
MODULATING  
R
X
+
HEAT  
(4-20 mA)  
SUBBASE  
T5  
T6  
T7  
T4  
T3  
OS  
M
OS  
M
AS  
X
AS MX MH MC  
RH RC AUX W1  
HS  
HC  
HP  
Y1  
G
3
HEAT  
RELAY 1  
FAN  
RELAY  
HUMIDITY  
SENSOR  
MOTION  
SENSOR  
COMPRESSOR  
CONTACTOR 1  
4
L2  
L1  
1
2
ECONOMIZER  
(
HOT)  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.  
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
4
5
WHEN USING THE TR23-H FOR HUMIDITY SENSING THERE IS NO NEED TO WIRE HC TERMINAL  
BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1  
COMMON AT THE SENSOR.  
M32364  
Fig. 24. Typical hookup of T7350M for system with two independent heat stages (one modulating),  
two independent cool stages (one modulating), and one transformer.  
63-2605—06  
30  
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T7350 Commercial Programmable Thermostat  
TR23-H REMOTE SENSOR  
OUTDOOR  
AIR  
SENSOR  
MODULATING  
R
X
COOL  
+
(4-20 mA)  
1
2
3
4
5
6
7
8
9
10 11 12  
DISCHARGE  
AIR  
SENSOR  
MODULATING  
R
X
HEAT  
+
(4-20 mA)  
SUBBASE  
T5  
T6  
T7  
T4  
T3  
OS  
M
OS  
M
AS  
X
AS  
MX MH MC  
HS  
HC  
HP  
RH RC AUX W1  
2
Y1  
G
4
HEAT  
RELAY 1  
FAN  
RELAY  
HUMIDITY  
SENSOR  
MOTION  
SENSOR  
COMPRESSOR  
CONTACTOR 1  
3
L2  
L1  
L2  
L1  
1
ECONOMIZER  
1
(
HOT)  
(HOT)  
HEATING  
TRANSFORMER  
COOLING  
TRANSFORMER  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.  
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.  
4
WHEN USING THE TR23-H FOR HUMIDITY SENSING THERE IS NO NEED TO WIRE HC TERMINAL  
BECAUSE THE T3 TERMINAL IS INTERNALLY TIED TO HC, WHICH IS ALSO TIED TO TERMINAL 1  
COMMON AT THE SENSOR.  
M32143  
Fig. 25. Typical hookup of T7350M for system with two independent heat stages (one modulating),  
two independent cool stages (one modulating), and two transformers.  
31  
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T7350 Commercial Programmable Thermostat  
APPENDIX - PDA USAGE  
See Table 20 for the advanced setup options available through  
a PDA.  
OFFLINE CONFIGURATION  
While disconnected from the thermostat, you can arrange and  
save named configurations.  
NOTE: Upon initial thermostat power-up, wait at least 30 sec-  
onds before connecting the TIM.  
NOTE: The user can note the Configuration ID and manually  
set the code using the T7350 user interface.  
Hardware Requirements  
CONNECT AND CONFIGURE  
The Thermostat Configuration Tool has the following  
configuration:  
Connect to a thermostat and:  
— configure device with existing named parameter  
arrangement,  
PDA hardware platform supporting application software.  
Serial Connection Cable with TIM. The interface plug  
connects to the thermostat socket.  
— configure device by changing all parameters  
— read the existing configuration parameter values and  
change one or more configuration parameters  
save new configuration file.  
CAUTION  
Can damage the TIM connection beyond repair.  
Disconnect the TIM cable prior to opening or closing  
the thermostat cover.  
NOTE: The configuration tool verifies that the subbase  
supports the existing arrangement.  
Equipment Damage Hazard  
CONFIGURATION PROCEDURE  
1
2
.
.
Enter the T7350 PDA application. (See Fig. 27.)  
If disconnected, the only usable functions are:  
a. New Config:  
Setting Clock  
It is best to set the clock before downloading anything else to  
the thermostat. Connect to the thermostat and set the clock.  
See Fig. 26.  
(
(
(
1) Enter a name for the configuration.  
2) Tap New Config.  
3) Proceed to Select Existing Config(uration)  
section.  
b. Select Existing Config: See below.  
NOTES:  
When setting the clock the first time, the PDA  
displays an incorrect T7350 Clock time, day, and  
date.  
Day-of-Week mode forces the T7350 to ignore hol-  
idays.  
Fig. 27. PDA configuration tool main menu.  
Select Existing Config(uration)  
This function is used to select a programmed configuration  
when setting up/programming a T7350. This can be useful  
when you use any given configuration more than once.  
Fig. 26. Set Clock menu.  
NOTES:  
PDA Programming  
You can modify details of a given configuration  
prior to downloading it into any particular T7350.  
The PDA tool will notify you when a selected  
configuration requires more stages/features than  
the T7350 into which you are downloading it.  
Configuration screens will vary depending on the  
T7350 model selected.  
The PDA Configuration Tool can perform a variety of tasks:  
Configure the thermostat.  
Calibrate the thermostat.  
Perform diagnostics.  
NOTE: To install the configuration tool on a second PDA:  
1
.
.
Power up both PDAs.  
2
Execute the following command sequence from  
the source PDA: Menu, Beam, T7350, Beam.  
To configure a T7350:  
From the opening screen, tap Select Existing Config.  
See Fig. 28.)  
2. Select the desired configuration.  
1.  
(
Configuration  
Whether the configuration is performed offline or while  
connected, the procedure is the same.  
63-2605—06  
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T7350 Commercial Programmable Thermostat  
Fig. 28. Select Existing Config.  
Fig. 30. Inputs screen.  
3
.
This brings up the Summary screen. From here, you can  
make changes using the:  
8
.
.
Make changes and tap “Next”.  
a. Novice navigation screens (that appear), or  
b. Advanced navigation screens, using the hidden  
menus. (These are designed for expert users.)  
NOTE: Novice navigation to the Dehumidification  
screen is controlled based on the T7350 model  
and configured room humidity sensor status.  
So, step 9 and Fig. 31 may not apply.  
(
1) Access to the Advanced Navigation mode is  
obtained using one of the following methods:  
(a)Tap the lower left “Menu” silk screen icon.  
b)Tap the Title Tab of any screen.  
9
The Dehumidification screen facilitates changes to:  
a. Room humidity high limit.  
(
RESULT: The Config Tool replaces the existing Screen  
Title Tab with the Advanced Navigation menu  
displayed across the top of the screen.  
Tap “SaveAs” to save the changes under a new name.  
The Summary screen facilitates changes to:  
a. Description.  
b. Dehumidification options.  
4.  
.
5
b. Model.  
c. Control (Standard or Heat Pump).  
Fig. 31. Dehumidification screen.  
1
0. Make changes and tap “Next” to proceed to the Cooling  
Config(uration) screen.  
1. The Cooling Config screen facilitates changes to:  
a. Number of Stages.  
1
Fig. 29. Configuration Summary screen.  
b. Cooling Response.  
c. OAT Lockout and DAT Low Limit Setpoints (for some  
models).  
6
.
.
Make changes and tap “Next” to proceed to the Inputs  
screen.  
7
The Inputs screen facilitates changes to:  
a. RoomTemp(erature).  
b. Room Rel(ative) Humidity.  
c. Occ(upancy) Sensor.  
d. Discharge Air Temp(erature).  
e. Outdoor Air Temp(erature).  
NOTE: Some selections only appear for the models  
that support them.  
T7350D  
T7350M  
Fig. 32. Cooling Config(uration) screen.  
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T7350 Commercial Programmable Thermostat  
1
2. Make changes and tap “Next” to proceed to the Heating  
Config(uration) screen.  
13. The Heating Config(uration) screen facilitates changes  
to:  
a. Number of Stages.  
b. Heating Response.  
c. OAT Lockout and DAT High Limit Setpoints (for some  
models).  
Fig. 35. Fan screen.  
1
8. Make changes and tap “Next” to proceed to the Weekly  
Schedule screen.  
NOTE: The only schedule days/times displayed are  
those in the program. It is possible to have as  
many as 4 event times per day for each day  
T7350D  
T7350M  
(
including holiday) programmed into each set.  
Fig. 33. Heating Config(uration) screen.  
1
9. The Weekly Schedule screen facilitates changes to the  
program schedule:  
1
4. Make changes and tap “Next” to proceed to the Outputs  
screen.  
a. Tap Modify. (See Fig. 37.)  
b. Select a day to modify.  
1
5. The Outputs screen facilitates changes to output type(s).  
c. Make changes to:  
(1) Mode (see Fig. 38).  
NOTE: When configured with an extra stage of heat or  
cool (using the auxiliary stage) the Outputs  
screen shows nothing but this indication.  
NOTE: To remove a given event, change Mode  
to “None”.  
(
2) Time (see Fig. 39).  
d. Repeat step c for all events until changes are  
complete for the given day.  
NOTE: To copy a day schedule, check the appropriate  
boxes, and click CopyDayTo. (See Fig. 40.)  
e. Tap OK.  
f. Type in a name for the new schedule.  
g. Tap SaveAs.  
Fig. 34. Outputs screen.  
1
6. Make changes and tap “Next” to proceed to the Fan  
screen.  
17. The Fan screen facilitates changes to:  
a. Fan Switch (On or Auto).  
b. Fan Operation (Conventional or Electric Heat).  
c. Heat and cool extended operation.  
Fig. 36. Weekly Schedule screen.  
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T7350 Commercial Programmable Thermostat  
2
2
0. Tap “Next” to proceed to the SetPoints screen.  
1. The SetPoints screen facilitates changes to the:  
a. Default setpoints.  
b. Occupied Setpoint stops.  
c. Temporary Override duration.  
Fig. 37. Weekly Schedule modification screen.  
Fig. 41. SetPoints screen.  
2
2. Make changes and tap “Next” to return to the Summary  
screen.  
2
2
3. Tap “Save” to save changes under the existing name.  
4. Tap “DownLd” to download changes to a connected  
T7350.  
25. Tap “CnfgID” to have the device calculate configuration  
number(s).  
26. The configuration numbers represent the C numbers  
(
C1.C2.C3.C4.C5.C6.C7.C8) that can be input using the  
T7350 keypad.  
Fig. 38. Weekly Schedule Mode modification.  
Fig. 39. Weekly Schedule Time modification.  
Fig. 40. Weekly Schedule Mode CopyDayTo.  
NOTE: The configuration numbers determine all but  
the schedule and setpoints.  
2
7. To return to the Home Screen, tap the Menu icon (lower  
left hand corner silk screen) and tap Set / Home.  
Fig. 42. Summary screen with configuration numbers.  
Deleting Configurations  
1
.
Make certain you are in a configuration other than the  
one you plan to delete.  
2
3
4
5
6
7
8
.
.
.
.
.
.
.
Tap the Summary tab in the upper left corner.  
Select File / Delete.  
Select the configuration to delete.  
Tap DELETE.  
A prompt appears allowing you to cancel the deletion.  
To delete more configurations, return to step 4.  
When finished with deletions, tap DONE.  
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T7350 Commercial Programmable Thermostat  
2.  
Tap Modify. (See Fig. 44.)  
Weekly (Wkly) Schedule  
This function is used to upload/modify/download schedule sets  
for programming a T7350. This can be useful if you want to  
change only schedule settings.  
NOTE: The schedule can also be modified from within a  
given configuration.  
Holidays  
This function is used to upload/modify/download holiday sets  
for programming a T7350. This can be useful if you want to  
change only holiday settings. It is especially useful if you use  
any group of holidays more than once.  
NOTE: The holidays can be modified from within a given con-  
figuration.  
Fig. 44. Holiday modification screen.  
To create a new holiday group:  
3. Select a holiday slot to modify or create.  
4. Make changes to:  
1.  
From the main menu, tap Holidays. (See Fig. 43.)  
a. Holiday title.  
NOTE: The only holidays displayed are those  
contained in a program set. It is possible to  
have as many as 10 holidays programmed into  
each set.  
b. Start Month.  
NOTE: To remove a given holiday, change the Start  
Month to “None” and tap “OK”. The title will  
remain, but the holiday will not operate.  
c. Start Day.  
d. Duration.  
NOTE: To remove all evidence of a given holiday,  
change Title to “Hol ##”, Start Month and Start  
Day to “None”, Duration to “0” and tap “OK”.  
e. Spin Speed.  
NOTE: Spin Speed determines the increment change  
(
1X or 10X) for Start Day and Duration. The  
spin speed setting is local for each screen.  
5
.
Repeat steps 2 through 4 until changes are complete for  
the given holiday set.  
Fig. 43. Holiday screen.  
6.  
7.  
8.  
9.  
Type in a name for the new holiday set.  
Tap SaveAs.  
Repeat steps 2 through 8 for all desired holiday sets.  
To return to the main menu, tap the Holiday screen OK.  
Calibration  
Connect to a thermostat and calibrate the temperature display.  
Online Diagnostics  
Connect to a thermostat and, using the “Monitor Data” function,  
read diagnostic information including:  
Thermostat firmware version.  
Thermostat hardware version.  
Subbase hardware version.  
Run time error messages.  
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T7350 Commercial Programmable Thermostat  
Table 20. Thermostat Setup Options Through PDA.  
PDA  
Configuration Option  
Factory Defaulta Tool CnfgID  
Description  
Fan Operation  
Conventional  
X
X
Conventional: Applications where equipment controls fan operation in heat mode.  
Electric Heat: Applications where thermostat controls fan operation in heat mode.  
The thermostat always controls the fan in cool mode.  
Extended Heat Fan  
Extended Cool Fan  
Extend 90 sec  
X
X
X
X
No Extended Op: No extended fan operation after call for heat ends.  
Extend 90 sec: Fan operation extended 90 seconds after call for heat ends.  
No Extended Op  
No Extended Op: No extended fan operation after call for cool ends.  
Extend 40 sec: Fan operation extended 40 seconds after call for cool ends.  
Control  
Standard  
ActvClg  
X
X
X
X
Standard: Conventional equipment; Heat Pmp: Heat Pump.  
HeatPump RevValve  
ActvClg: Energize O/B on call for cool.  
ActvHtg: Energize O/B on call for heat.  
Heat Output Stages  
a
X
X
Stages of heat (conventional HVAC equipment). Set to zero for heat pump.  
Three heat stages not available if configured for four stages of cooling.  
AuxStg  
1
X
X
X
X
Auxiliary Heat Stages (for heat pump applications): Number of stages (0,1, or 2).  
3 cph: Standard response for heating system;  
Heating Response  
6 cph  
6
2
cph: Medium response for heating system; 9 cph: Fast response for heating system;  
0 cph: Super fast response for heating systems.  
Heat Lockout  
None  
70° F  
X
X
X
None: No outdoor air temperature (OAT) lockout for heat.  
Enable: Heat locked out when OAT is greater than Heat Lockout Setpoint.  
Heat Lockout Setpoint  
Heat is locked out when OAT is greater than this setpoint.  
Range: -40 to 120° F  
Cool Output stages  
Cooling Response  
a
X
X
X
X
Stages of cool (conventional), or number of compressor stages (heat pump).  
3 cph: Standard response for cooling system.  
3 cph  
4
cph: Fast response for cooling system.  
Cooling response applies to compressors in heat pump applications.  
Cooling Lockout  
None  
35° F  
X
X
X
None: No OAT lockout for cool.  
Enable: Cool locked out when OAT is less than Cool Lockout Setpoint.  
Cool Lockout Setpoint  
Cooling is locked out if the outdoor temperature is less than this setpoint.  
Range: -40 to 120° F  
Cooling Valve  
Heating Valve  
Direct  
Direct  
Htg  
X
X
X
X
X
X
Modulating Cooling Valve Action: Direct or Reverse. (T7350M only.)  
Modulating Heating Valve Action: Direct or Reverse. (T7350M only.)  
Anticipator Authority  
Application  
Htg: Authority applies to heating only.  
Htg&Clg: Authority applies to both heating and cooling. (Found in Loop Tuning.)  
Anticipator Authority  
Cooling TR  
4° F  
X
X
X
X
X
X
X
X
X
X
X
Thermostat Anticipator Authority. Range: 2 to 15° F.  
a
Cooling Throttling Range. Range: 1 to 30° F. (Found in Loop Tuning.)  
Cooling Integral Time. Options: 0, 100 to 5000 sec. (0: disable.)  
Cooling Derivative Time. Options: 0, 10 to 3000 sec. (0: disable.)  
Heating Throttling Range. Range: 1 to 30° F. (Found in Loop Tuning.)  
Heating Integral Time. Options: 0, 100 to 5000 sec. (0: disable.)  
Heating Derivative Time. Options: 0, 10 to 3000 sec. (0: disable.)  
Temperature Display: °F or °C.  
Cooling IT  
a
Cooling DT  
0 sec  
Heating TR  
Heating IT  
a
a
Heating DT  
Display Units  
Clock Format  
0 sec  
°F  
X
X
AM/PM  
No Change  
AM/PM: 12-hour clock format. 24 hr: 24-hour clock format.  
Temperature Display  
Calibration  
No Change: Displayed temperature is actual room temperature.  
Can adjust to display up to 3° F (1.7° C) higher or down to 4° F (2.2° C) lower than room  
temperature.  
TempOverride  
3
X
X
Temporary Occupied Override duration. Range: 1 to 8 hours.  
a
The Factory defaults listed here apply to all subbase models with the exceptions of the items listed in Table 21.  
b
c
d
1
2:00 Noon is the default start point when time is unknown.  
Only Available if user selected one or more of following: Dehumidification Reset, Dehumidification Minimum On, or Dehumidification Reheat.  
Config ID cannot handle Standby setpoints. Keypad users cannot set Occupied setpoints that violate Not Occupied setpoint relationship. The T7350  
algorithm never allows the effective setpoint outside Not Occupied setpoints.  
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T7350 Commercial Programmable Thermostat  
Table 20. Thermostat Setup Options Through PDA. (Continued)  
PDA  
Configuration Option  
Factory Defaulta Tool CnfgID  
Description  
RoomTemp  
Local  
X
X
Room Temperature Input  
Local: Use internal sensor; TR21/TR24: Use remote sensor.  
TR22/TR23: Use remote sensor with setpoint adjustment capability (requires PDA or  
TStatSpec software and USB-TIM/U cable).  
T7771: Use remote sensor with setpoint adjustment capability (requires PDA or TStatSpec  
software and USB-TIM/U cable); changes T7771 LED and bypass button operation: LED  
on means either occupied or bypass, pushing bypass can cancel bypass.  
RoomRelHumidity  
a
X
X
Room Relative Humidity Input.  
None: No humidity sensor; Local: Use internal humidity sensor;  
Remote: Use remote humidity sensor (0-10 Vdc signal).  
Discharge AirTemp  
Outdoor AirTemp  
None  
None  
X
X
X
X
Discharge Air Temperature Input.  
None: No discharge air sensor; or Remote: Remote discharge air sensor.  
Outdoor Air Temperature Input.  
None: No outdoor air sensor; or Remote: Remote outdoor air sensor.  
OccSensor  
AuxDO  
0
X
X
X
X
None: No occupancy sensor; or Remote: Remote occupancy sensor.  
Time of Day  
Auxiliary Contact Operation:  
Time of Day, Economizer, Dehumid Hot Gas BP, or Simple Dehumid.  
Auxiliary contact not available if heat pump selected with T7350A.  
Key Pad (Lockout)  
Enable All  
X
X
Keypad lockout enable/disable through special keypad sequence.  
Enable All (0): No lockout.  
SetPts & Ovrrd (1): Lockout all keys except: Temporary (Not) Occupied,,and  
Info Only (2): Lockout all keys except  
.
.
The special keypress features are never locked out.  
Minimum heating recovery ramp rate. Range: 0 to 20° F/hr.  
Maximum heating recovery ramp rate. Range: 0 to 20° F/hr.  
Minimum cooling recovery ramp rate. Range: 0 to 20° F/hr.  
Maximum heating recovery ramp rate. Range: 0 to 20° F/hr.  
Minimum heating outdoor air temperature. Range: -20 to 100° F.  
Maximum heating outdoor air temperature. Range: -20 to 100° F.  
Minimum cooling outdoor air temperature. Range: -20 to 100° F.  
Maximum cooling outdoor air temperature. Range: -20 to 100° F.  
Demand limit control set point bump. Range: 0 to 10° F.  
Recovery Heat RampMin  
5° F/hr  
X
X
X
X
X
X
X
X
X
X
Recovery Heat RampMax 8° F/hr  
Recovery Cool RampMin 3° F/hr  
Recovery Cool RampMax 6° F/hr  
Recovery Heat [email protected] 0° F  
Recovery Heat [email protected] 40° F  
Recovery Cool [email protected] 90° F  
Recovery Cool [email protected] 70° F  
Demand Limit Control Bump 3° F  
Power Failure Seq Start  
0 (x10 sec)  
X
Delays start of equipment (fan, heat, cool) after power restored to thermostat.  
Range: 0 to 150 seconds (in 10-second increments).  
Enable DAT High Limit  
Enable DAT Low Limit  
High Limit DAT Setpoint  
Low Limit DAT Setpoint  
Dehumidification Min On  
None  
None  
110° F  
45° F  
None  
X
X
X
X
X
X
X
None: No Discharge Air Temperature (DAT) high limit; Enable: Use DAT High Limit.  
None: No Discharge Air Temperature (DAT) low limit; Enable: Use DAT Low Limit.  
Discharge Air Temperature High Limit Setpoint. Range: 65 to 140° F.  
Discharge Air Temperature Low Limit Setpoint. Range: 35 to 60° F.  
X
X
X
None: No Minimum On Time dehumidification;  
Enable: Dehumidification using Minimum On Time.  
Dehumidification Min On  
Time  
5
X
X
X
X
Minimum on time used with “Dehumidify Minimum On”. Range: 5 to 15 minutes.  
Dehumidification Reset  
Temp  
None  
2° F  
None  
None: No Reset dehumidification; Enable: Dehumidification using Reset.  
Dehumidification Reset  
Temp Setpt  
Amount of reset used with “Dehumidify Reset”. Range: 1 to 5° F.  
Must be smaller than occupied zero energy band (ZEB) or standby ZEB.  
Dehumidification Reheat  
None: No Reheat dehumidification; Enable: Dehumidification using Reheat.  
a
The Factory defaults listed here apply to all subbase models with the exceptions of the items listed in Table 21.  
b
c
d
1
2:00 Noon is the default start point when time is unknown.  
Only Available if user selected one or more of following: Dehumidification Reset, Dehumidification Minimum On, or Dehumidification Reheat.  
Config ID cannot handle Standby setpoints. Keypad users cannot set Occupied setpoints that violate Not Occupied setpoint relationship. The T7350  
algorithm never allows the effective setpoint outside Not Occupied setpoints.  
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T7350 Commercial Programmable Thermostat  
Table 20. Thermostat Setup Options Through PDA. (Continued)  
PDA  
Configuration Option  
Factory Defaulta Tool CnfgID  
Description  
Dehumidification High Limit. Range: 10 to 90%.  
Dehumidification High Limit 65%  
X
Xc  
Clock Year  
1999  
12  
X
X
X
X
Range: 2000 to 2035.  
Clock Month  
Clock Day  
1: January… 12: December.  
Wed  
Day of the Week: Sun, Mon, Tue, Wed, Thu, Fri, Sat  
12:00 a.m.: Midnight (first minute of the day); 12:00 p.m.: Noon.  
Clock Minutes  
1:15 p.m.b  
X
1
Holiday Month  
Holiday Day  
Holiday Duration  
Delays  
0
X
X
X
X
Unprogrammed; January…December.  
0
Unprogrammed; 1; 2…31; LASTDAYOFMONTH…LAST_SAT  
Duration of given Holiday (in days). Range: 0 to 99 days.  
0 days  
On  
X
On: Delays (on relays, sequential start, etc.) are active.  
Off: Delays disabled (also called Test Mode).  
System Switch  
Fan Switch  
Auto  
On  
X
X
X
X
X
System settings: Auto; Cool; Off; Heat; Emergency Heat (valid if Heat Pump)  
Fan setting: On; Auto  
Occupied Heat Setpt Stop 55° F  
Occupied Cool Setpt Stop 85° F  
Not Occupied Heat Setpoint 55° F  
Occupied Minimum Heat Setpoint: Lowest the programmed occupied heating setpoint can  
be adjusted. Range: 40 to 90° F; Value  OccHt  OccCl - 2° F.  
X
X
Occupied Maximum Cool Setpoint: Highest the programmed occupied cooling setpoint can  
be adjusted. Range: 45 to 99° F. Value OccCl OccHt + 2° F.  
X
Not Occupied heating setpoint. Range: 40 to 90° F.  
UnoccHt OccHt OccCl - 2° F; UnoccHt StdByHt StdByCl - 2° F  
Standby Heat Setpoint  
Occupied Heat Setpoint  
Occupied Cool Setpoint  
Standby Cool Setpoint  
67° F  
70° F  
75° F  
78° F  
X
X
X
X
X
d
Standby heating setpoint. Range: 40 to 90° F.  
Occupied heating setpoint. Range: 40 to 90° F.  
Occupied cooling setpoint. Range: 45 to 99° F.  
Standby cooling setpoint. Range: 45 to 99° F.  
X
X
d
Not Occupied Cool Setpoint 85° F  
X
Not Occupied cooling setpoint. Range: 45 to 99° F.  
UnoccCl  OccCl  OccHt + 2° F; UnoccCl  StdByCl  StdByHt + 2° F.  
Event 1 State  
Event 2 State  
Event 3 State  
Event 4 State  
Occupied  
X
X
X
X
X
X
X
X
Day Schedule is a structure of 8 days of 4 events each day. Defaults listed are for Monday  
through Friday. Saturday/Sunday/Holiday default to Unprogrammed (None / 12:00 a.m.).  
All Events can be set for: Standby or None.  
Only Events 1 and 3 can be set for Occupied.  
Only Events 2 and 4 can be set for Not Occupied.  
Not Occupied  
None  
None  
Note: The Config ID cannot set an event to Standby, but it can change the time.  
Event 1 Time  
Event 2 Time  
8:00 a.m.  
10:00 p.m.  
12:00 a.m  
X
X
X
X
X
X
X
X
Scheduled time for event change.  
1
2:00 p.m.: Noon  
2:00 a.m.: Midnight  
1
Event 3 Time  
Event 4 Time  
a
(midnight)  
The Factory defaults listed here apply to all subbase models with the exceptions of the items listed in Table 21.  
b
c
d
1
2:00 Noon is the default start point when time is unknown.  
Only Available if user selected one or more of following: Dehumidification Reset, Dehumidification Minimum On, or Dehumidification Reheat.  
Config ID cannot handle Standby setpoints. Keypad users cannot set Occupied setpoints that violate Not Occupied setpoint relationship. The T7350  
algorithm never allows the effective setpoint outside Not Occupied setpoints.  
39  
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T7350 Commercial Programmable Thermostat  
Table 21. Exceptions to Factory Defaults.  
T7350D  
T7350H1009  
T7350M  
T7350H1017  
Configuration Option  
Heat Output Stages  
T7350A  
T7350B  
1
1
2
2
3
3
0
0
Cool Output Stages  
Room Humidity Sensor  
Heat Throttling Range  
Cool Throttling Range  
Heat Integral Time  
None  
3
None  
4
Local  
7
7
1650  
1650  
Local  
5
5
1250  
1250  
3
4
3100  
3100  
2500  
2500  
Cool Integral Time  
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