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user’s information  
manual  
COMMERCIAL THERMOSTAT  
(P/N TSTATBBPCM01-B)  
Cancels: OM TSTAT-1  
OM TSTAT-51  
/15/99  
9
IMPORTANT: Read entire instructions before programming  
A. Programming Button Lockout  
the thermostat.  
The thermostat has  
a lockout feature which will not  
acknowledge programming buttons until the lockout code is  
entered. After the lockout code has been entered, the keypad  
will remain unlocked until the user has stopped pressing  
buttons for 2 minutes. The lockout feature is configured by  
the installer.  
GENERAL  
Bryant’s 7-day, commercial, programmable thermostats are  
wall-mounted, low-voltage thermostats which maintain  
room temperature by controlling the operation of an HVAC  
(
heating, ventilation, and air conditioning) system. Separate  
NOTE: The lockout code sequence is Mode, Copy Previous  
Day, Set Time/Temp, and Hold.  
heating and cooling set points and auto-changeover capabil-  
ity allow occupied and unoccupied programming schedules  
for energy savings.  
NOTE: The Occupied button is not disabled by the Lockout  
feature.  
All thermostats allow up to 4 time and temperature settings  
to be programmed per 24-hr period. Each thermostat stores  
programs for 7 independent days. Batteries are not required.  
During power interruption the internal memory stores pro-  
grams for an unlimited time.  
B. Hold Button Operation  
Pressing the Hold button disables the time and temperature  
schedule and holds the current desired temperature set  
point. When a Hold is active, the HOLD annunciator is dis-  
played on the thermostat screen. To release the Hold, press  
the Hold button a second time. The Hold will remain active  
indefinitely and the desired temperature will not change  
according to the program time or the derived temperature  
values. The desired temperature can be changed using the  
Up and Down buttons.  
OPERATION  
I. THERMOSTAT DISPLAY  
The thermostat display is located in the top center of the  
thermostat. See Fig. 1. The following information can be dis-  
played on the screen:  
C. Fan Button Operation  
mode (OFF, EHEAT, COOL, AUTO, or HEAT)  
fan setting (ON or AUTO)  
hold status  
room temperature  
desired temperature  
clean filter status  
time of day  
day of the week  
schedule period (OC1, UN1, OC2, or UN2)  
outdoor temperature (optional)  
The Fan button selects fan operation. When the fan is set to  
ON, the fan will run continuously. When the fan is set to  
AUTO, the fan will run during heating and cooling operation  
only.  
If the fan is set to ON, but the Allow Continuous Fan During  
Unoccupied Hours configuration is set to OF, the fan will not  
run during unoccupied hours when heating or cooling is not  
active. A small triangle will be displayed next to the Fan On  
icon to show the user that the fan is not running because of  
the unoccupied time period.  
II. THERMOSTAT PROGRAMMING BUTTONS AND  
OPERATION  
D. Mode Button Operation  
The thermostat has programming buttons which are used to  
change the set points of the thermostat, set the modes, and  
program schedules. The programming buttons are accessible  
from underneath the thermostat cover. To access the pro-  
gramming buttons, pull on the hinged thermostat cover. See  
Fig. 2. The programming buttons are: Copy Previous Day,  
Program, Mode, Change Day, End, Fan, Set Time/Temp,  
Occupied, and Hold.  
The Mode button selects the operating mode of the thermo-  
stat. If OFF is selected, the thermostat will not enter Heat-  
ing or Cooling mode. If HEAT is selected, the thermostat will  
only enter Heating mode (if the room temperature is below  
the heating set point). If COOL is selected, the thermostat  
will only enter Cooling mode (if the room temperature is  
above the cooling set point). If AUTO is selected, the thermo-  
stat will enter Heating or Cooling mode based on the room  
temperature and the heating and cooling set points. Units  
also have an EHEAT selection which is configured by the  
installer. If EHEAT is selected, the unit will use the second  
stage of heating to provide heating, if necessary. The annun-  
ciator for each selection will be displayed on the thermostat  
when selected.  
The Up and Down buttons are used to change the current,  
desired temperature set point and to scroll through program-  
ming set points. The Up and Down buttons are accessible  
from the outside of the thermostat.  
The daily schedule can be overridden in 3 ways: pressing the  
Hold button, pressing the Up and Down buttons to change  
the temperature set point, or pressing the Occupied button.  
E. Auto-Changeover  
VI. PROGRAMMING THERMOSTAT SCHEDULES  
When the thermostat mode is set to AUTO, the thermostat  
will provide automatic changeover from Heating to Cooling  
mode and Cooling to Heating mode when required. The ther-  
mostat will automatically switch to maintain the desired  
temperature setting. The thermostat does not need to be  
manually changed from heating to cooling or cooling to heat-  
ing operation.  
Before programming the thermostat, plan the thermostat  
daily schedule. The schedule is divided into 7 days (Monday  
through Sunday). Each day has 4 time periods (OC1, UN1,  
OC2, UN2). Each time period has a start time, heating set  
point, and cooling set point. Fill in Table 1 on page 4 as an  
aid to programming the daily schedules.  
When choosing the times for OC1, UN1, OC2, and UN2, the  
following rules must be followed:  
NOTE: It is recommended that auto-changeover mode not be  
used if the outdoor temperature is consistently lower than  
The maximum number of hours allowed from OC1 to  
UN1, or from OC2 to UN2 is 12 hours. For example, if  
OC1 has a value of 6:00 AM and UN1 had a value of  
5
0 F or greater than 80 F. In these cases, select heating or  
cooling mode only.  
5
:00 PM, this would be acceptable. If however, OC1 has  
F. Unoccupied Override  
a value of 6:00 AM and UN1 has a value of 7:00 PM, this  
would not be acceptable because the difference is greater  
than 12 hours.  
The value of UN2 must be greater than or equal to the  
value of OC2, while the value of OC2 must be greater  
than or equal to the value of UN1, and the value of UN1  
must be greater than or equal to OC1. For example,  
acceptable values would be:  
The Occupied button is only active during unoccupied peri-  
ods. The Occupied button is inactive during occupied periods.  
If the thermostat is in unoccupied mode and the user presses  
the Occupied button, the set points are changed to the OC1  
set points for heating and cooling. The OC1 icon will flash to  
show the user that the thermostat is in override.  
The thermostat will remain in override until the next sched-  
uled time period or for the number of allowed override hours  
programmed in the thermostat configuration (Option 18)  
whichever comes first.  
OC1  
UN1  
OC2  
UN2  
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:00 AM  
5:00 PM  
5:00 PM  
10:00 PM  
In the example above, the thermostat will be occupied from  
:00 AM to 10:00 PM. However, if the following values were  
entered, the thermostat would not be occupied as one may  
expect:  
NOTE: If the set points are changed during unoccupied over-  
ride, the unoccupied 1 (UN1) set points will be changed.  
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G. Smart Recovery (Heating Mode)  
OC1  
UN1  
OC2  
UN2  
The smart recovery function is designed to save energy by  
gradually adjusting temperatures to meet scheduled set  
points. The thermostat has 2 schedule modes, normal occu-  
pied mode and setback mode (a time when the space is unoc-  
cupied). The Smart Recovery function begins 1 to 1.5 hours  
before the scheduled occupied mode and gradually adjusts  
room temperature so the temperature is at the occupied  
mode set point when the occupied time period begins.  
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:00 AM  
7:00 PM  
6:00 PM  
12:00 AM  
In the new example, the thermostat will display UN2 from  
2:00 AM to 6:00 AM, then OC1 from 6:00 AM to 6:00 PM,  
then OC2 from 6:00 PM to 7:00 PM, then UN1 from  
:00 PM to 12:00 AM. The thermostat, in this example,  
would be occupied from 6:00 AM to 7:00 PM because OC2  
has a value less than the value of UN1.  
1
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This is more efficient than making the system run at full  
capacity until the desired temperature is met.  
A. Programming Mode  
To program the daily schedules, perform the following  
procedure:  
NOTE: Smart Recovery does not apply to cooling operation.  
1
. Enter Programming mode by pressing the Program  
button. The PROGRAMMING annunciator will  
appear on the thermostat display. The current day of  
the schedule will be displayed and the current pro-  
gramming time period of that day will be displayed.  
The TIME annunciator will flash.  
III. SET CURRENT DAY  
The Change Day button will change the day shown on the  
thermostat display to the next day. If a schedule has been  
entered, the thermostat will follow the schedule of the new  
selected day.  
IV. SET CURRENT TIME  
NOTE: If a programming button is not pushed for 2 minutes,  
the thermostat will exit Programming mode and any  
changes made will be saved.  
The Set Time/Temp button allows the user to change the  
time displayed on the thermostat. Press the Set Time/Temp  
button. The TIME annunciator will flash. Press the Up and  
Down buttons until the correct time is shown. Hold down the  
buttons to quickly move through the time display. The AM  
and PM annunciators will automatically change. To ensure  
the schedules are properly followed, make sure that AM or  
PM is correct for the time chosen. When the correct time is  
shown, press the End button to exit the Set Time mode.  
2. Press the Up and Down buttons to set the start time  
for the schedule day and period shown.  
3
. Press the Set Time/Temp button once the correct  
time is shown. The TIME annunciator will stop flash-  
ing and the HEAT annunciator will flash.  
4
. The heating and cooling set points can now be pro-  
grammed. The HEAT and COOL annunciators will  
flash for the heating and cooling set points respec-  
tively. The Set Time/Temp button is used to toggle  
between the time, heating, and cooling set points.  
Use the Up and Down buttons to raise and lower the  
temperature set points.  
V. RESET FILTER  
The Reset Filter function is used to clear the “Clean Filter”  
icon on the display screen. The Reset Filter function is initi-  
ated by pressing the Hold and Occupied buttons simulta-  
neously. The “Clean Filter” icon reminds the user when it is  
time to change or clean the filter of the unit.  
NOTE: There must be at least 2 degrees difference between  
the cooling and heating set points. The thermostat will auto-  
matically change any set points closer than 2 degrees.  
2—  
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Mode  
OFF  
EHEAT  
COOL  
AUTO  
OC1 UN1 OC2 UN2  
MoTu We Th  
HOLD  
Fr Sa Su  
TIME AM PM  
COOL  
HEAT  
Fan  
ON  
AUTO  
CLEAN FILTER  
AUX HT  
PROGRAMMING  
Fig. 1 Thermostat Liquid Crystal Display  
CHANGE DAY  
BUTTON  
COPY PREVIOUS  
DAY BUTTON  
PROGRAM  
BUTTON  
MODE BUTTON  
DISPLAY  
SCREEN  
UP BUTTON  
Programmable  
Thermostat  
COPY PREVIOUS DAY  
CHANGE DAY  
PROGRAM  
MODE  
END  
FAN  
SET TIME/TEMP  
OCCUPIED  
HOLD  
THERMOSTAT  
COVER (OPEN)  
SET TIME/TEMP  
BUTTON  
OCCUPIED  
BUTTON  
END  
BUTTON  
RESET FILTER  
(PRESS  
SIMULTANEOUSLY)  
HOLD  
BUTTON  
FAN  
BUTTON  
DOWN  
BUTTON  
Fig. 2 Thermostat Display and Programming Buttons  
3—  
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. Press the Program button to advance to the next time  
period.  
not change according to the program time or desired temper-  
ature values. The HOLD will last indefinitely until the  
HOLD button is pressed again. The user can still change the  
desired temperature by using the Up and Down buttons.  
. Perform Steps 2 through 5 until the times and tem-  
perature set points have been entered for the entire  
day. Press the Change Day button to move to the  
schedule for the next day.  
When using the Up or Down buttons, the thermostat will use  
the new set point until the next scheduled time period. At  
the next scheduled time period the thermostat will revert  
back to the programmed temperature values.  
7
8
. Repeat Steps 2 through 6 to program the remaining  
schedule days. The Copy Previous Day button can be  
used to copy the previous day’s schedule if the sched-  
ules are the same.  
The Occupied override button can be used to force the ther-  
mostat into Occupied mode.  
. After all the times and set points for each day have  
been entered, press the End button to finish entering  
the schedule.  
VIII. DISPLAY OUTDOOR-AIR OR LEAVING-AIR  
TEMPERATURE  
When the Up and Down buttons are pressed at the same  
time, the display will show the temperature of the sensor  
wired to the thermostat. The temperature is displayed for  
NOTE: The thermostat will continue to follow the schedule  
until a new one is entered. The schedule may need to  
be updated for different seasons or prolonged changes in  
temperature.  
4
seconds with the letters “od” or “LA” (outdoor temperature  
or leaving air temperature, respectively). The display then  
returns to normal. If a sensor is not connected, the thermo-  
stat has been configured for use with a remote room sensor,  
or the reading is out of range, then “--” is displayed.  
VII. OVERRIDING THE SCHEDULE  
The schedule can be overridden in three ways, the Hold but-  
ton can be pressed to lock in the current temperature set-  
ting, the Up or Down buttons can be pressed to change the  
desired temperature, or the Occupied button can be pressed  
to change the unoccupied set points to OC1. The HOLD  
annunciator will turn on and the desired temperature will  
The valid temperature range for the outdoor-air sensor is  
–38 to 145 F. The valid temperature range for the leaving-air  
sensor is –38 to 145 F.  
Table 1 Daily Schedule Planner  
SCHEDULE  
UN1  
Time / Heat / Cool  
DAY OF  
OC1  
OC2  
UN2  
THE WEEK  
Time / Heat / Cool  
Time / Heat / Cool  
Time / Heat / Cool  
Monday  
Tuesday  
Wednesday  
Thursday  
Friday  
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Saturday  
Sunday  
NOTE: The cooling temperature set point must be at least 2 degrees higher than the heating temperature set point.  
Copyright 1999 Bryant Heating & Cooling Systems  
11-01A  
CATALOG NO. 809-694