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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).  
63-2605—06  
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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