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user’s information  
manual  
TEMPSURE COMMERCIAL THERMOSTAT  
7-DAY PROGRAMMABLE (P/N TSTATBBP250-01)  
Cancels: New  
OM TSTAT-2  
1/1/98  
1
CONTENTS  
Page  
1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4  
I. Thermostat Display . . . . . . . . . . . . . . . . . . . . . . .  
II. Heat or Cool Indicator . . . . . . . . . . . . . . . . . . . .  
III. Thermostat Front Panel Buttons . . . . . . . . . . . .  
IV. Thermostat Programming Buttons . . . . . . . . . .  
V. Set Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
VI. Programming Thermostat Schedules . . . . . . . .  
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OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5  
I. Auto-Changeover . . . . . . . . . . . . . . . . . . . . . . . . .  
II. Two-Stage Operation . . . . . . . . . . . . . . . . . . . . . .  
III. Clock Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
IV. Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
V. Emergency Heat . . . . . . . . . . . . . . . . . . . . . . . . . .  
VI. Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
VII. Holiday Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
VIII. Dry Contact Switch . . . . . . . . . . . . . . . . . . . . . . .  
IX. Remote Temperature Sensor . . . . . . . . . . . . . . .  
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Fig. 1 — Thermostat Display  
room temperature  
desired temperature  
service filter indicator  
time of day  
day of the week  
IMPORTANT: Read entire instructions before starting the  
installation.  
schedule period (Occupied 1, 2, or 3; or Unoccupied)  
setup indicator (programming mode)  
lock indicator  
GENERAL  
start/stop indicator (schedule period program mode)  
Bryant’s 7-day, commercial, programmable thermostats are  
wall-mounted, low-voltage thermostats which maintain room  
temperature by controlling the operation of an HVAC (heat-  
ing, ventilation, and air conditioning) system. Separate heat-  
ing and cooling set points and auto-changeover capability  
allow occupied and unoccupied programming schedules for  
energy savings.  
II. HEAT OR COOL INDICATOR  
A Heat or Cool indicator is located on the bottom left cover of  
the thermostat. See Fig. 2. The light will be red if the ther-  
mostat is in Heating mode. The light will be green if the ther-  
mostat is in Cooling mode.  
III. THERMOSTAT FRONT PANEL BUTTONS  
All thermostats allow up to 3 occupied and one unoccupied  
time/temperature setting to be programmed per 24-hour  
period. Each thermostat stores programs for 7 independent  
days. Batteries are not required. During power interruption  
the internal NEVERLOST™ memory stores programs for an  
unlimited time.  
The thermostat has buttons on the front cover which are used  
to raise or lower the desired set point and override the cur-  
rent program. See Fig. 2.  
A. Set Point Buttons  
The UP ARROW and DOWN ARROW buttons will raise  
or lower the current desired temperature set point. If the ther-  
mostat is in AUTO mode, pressing the UP ARROW or DOWN  
ARROW buttons will adjust both the heating and cooling set  
points. Pressing the UP ARROW or DOWN ARROW buttons  
in Cooling mode will adjust only the cooling set points. Press-  
ing the UP ARROW or DOWN ARROW buttons in Heat-  
ing mode will adjust only the heating set points. The UP  
ARROW and DOWN ARROW buttons are also used in pro-  
gramming mode.  
IMPORTANT: The thermostat has a configurable security level.  
If certain functions are not available (changing set points, chang-  
ing programming schedules), the thermostat security level may  
be configured to exclude those functions. Call the installer to  
reconfigure the security level.  
CONFIGURATION  
I. THERMOSTAT DISPLAY  
The thermostat display is located in the center of the ther-  
mostat. See Fig. 1. The following information can be dis-  
played on the screen:  
B. Override Button  
The Override button is used to force the thermostat from Un-  
occupied mode into the Occupied 1 mode comfort settings. The  
Override period will be set at 30 minutes. The thermostat  
mode (OFF, HEAT, COOL, AUTO, or PROGRAM ON)  
fan setting (FAN ON or blank)  
override indication  
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will then return to Unoccupied mode. To increase the amount  
of time in Override mode, press the Override button again.  
Thirty minutes of override time will be added for each time  
the Override button is pressed up to a maximum of 4 hours.  
After the 4-hour limit has been reached, press the Override  
button again to cancel override mode.  
press the UP and DOWN ARROW buttons simultaneously.  
The ‘‘Locked’’ icon will appear on the display.  
The thermostat is unlocked by performing the same proce-  
dure. Press and hold the Override button. While holding down  
the Override button, press the Up and Down Arrow buttons  
simultaneously. The ‘‘Locked’’ icon will be removed from the  
display.  
While in Override mode, the Override icon and the Occupied  
1
icon will be displayed on the thermostat. The time of day  
B. Fan Button Operation  
and the minutes remaining in Override mode will alternate  
on the thermostat display.  
The Fan button selects fan operation. When the fan is set  
to FAN ON, the fan will run continuously for improved air  
circulation.  
The set points are adjustable with the UP ARROW and DOWN  
ARROW keys during Override mode.  
NOTE: When the thermostat is in Unoccupied mode, the fan  
will run only during heating or cooling operation, even if the  
fan is set to FAN ON, this is the energy-saving smart fan  
feature.  
NOTE: If the thermostat is in Occupied mode and the Over-  
ride button is pressed, the thermostat will go into Un-  
occupied mode immediately. The thermostat will remain in  
Unoccupied mode until the next Occupied start time.  
When the fan is not set to FAN ON (no icon displayed on ther-  
mostat screen), the fan will run during heating and cooling  
operation only.  
IV. THERMOSTAT PROGRAMMING BUTTONS  
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 acces-  
sible from underneath the thermostat cover. To access the pro-  
gramming buttons, pull on the hinged thermostat cover. See  
Fig. 3. The programming buttons are: Mode, Fan, Holiday,  
Program, and Set Clock.  
C. Mode Button Operation  
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 thermostat will  
enter Heating or Cooling mode based on the room tempera-  
ture and the heating and cooling set points. If PROGRAM  
ON is selected, the stored schedule is enabled and the ther-  
mostat will follow the Occupied and Unoccupied schedules  
stored in its memory.  
The UP ARROW and DOWN ARROW buttons are used to  
scroll through programming set points. The buttons are also  
used to answer yes or no.  
Auto-Changeover  
When the thermostat mode is set to AUTO, the thermostat  
will provide automatic changeover from Heating to Cool-  
ing mode and Cooling to Heating mode when required. The  
thermostat will automatically switch to maintain the desired  
temperature setting. The thermostat does not need to be manu-  
ally changed from heating to cooling or cooling to heating  
operation.  
D. Holiday Mode  
Fig. 2 — Thermostat Front Panel Buttons  
The Holiday button places the thermostat into Holiday  
mode. During Holiday mode, the unoccupied set points are  
enforced. The number of days the thermostat will be in Holi-  
day mode can be set.  
V. SET CLOCK  
The Set Clock button allows the user to change the time and  
day displayed on the thermostat. Press the Set Clock button  
to enter Set Time mode. See Fig. 4. The current time will blink  
on and off. Press the UP ARROW and DOWN ARROW but-  
tons until the correct time is shown. Hold down the buttons  
Fig. 3 — Thermostat Programming Buttons  
A. Keypad Lock  
The thermostat has a keypad lockout feature which will not  
acknowledge front panel buttons until the lockout sequence  
is entered. To disable or lock the keypad, press and hold the  
Override button. While holding down the Override button,  
Fig. 4 — Setting the Clock  
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to quickly move through the time display. The AM and PM  
annunciators will automatically change. To scroll through by  
hours only, press and hold down the fan button while press-  
ing the UP ARROW or DOWN ARROW buttons. 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 Mode button to modify the day of the week.  
The current day will blink on and off. Press the UP ARROW  
and DOWN ARROW buttons until the correct day is shown.  
Press the Set Clock button again to exit the Set Time mode.  
5. The heating set point for Unoccupied will be dis-  
played. Use the UP ARROW and DOWN ARROW but-  
tons to raise or lower the heating set point until the  
desired temperature is shown. The range of acceptable  
values is 35 to 99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied  
heating). Press the Mode button to continue.  
6
. The day of the week will be shown. Use the UP  
ARROW and DOWN ARROW buttons to change the  
day of the week until the desired starting day is shown.  
Possible choices are M (Monday) through S (Sunday).  
Press the Mode button when the desired day is shown.  
VI. PROGRAMMING THERMOSTAT SCHEDULES  
7
. The Start Time for Occupied 1 will be displayed. Use  
the UP ARROW and DOWN ARROW buttons to raise  
or lower the time until the desired Start Time is shown.  
Press the Mode button to continue. See Fig. 6.  
Before programming the thermostat, plan the thermostat daily  
schedule. The schedule is divided into 7 days (Monday through  
Sunday). Each day can have 2 (Occupied 1, Unoccupied),  
3
(Occupied 1, Occupied 2, Unoccupied), or 4 (Occupied 1,  
Occupied 2, Occupied 3, Unoccupied) time periods. Each  
occupied time period has a start time, stop time, heating set  
point, and cooling set point. The unoccupied time period has  
a heating set point and a cooling set point. The unoccupied  
time period is active whenever an occupied time period is not  
active. Fill in Table 1 on page 5 as an aid to programming  
the daily schedules.  
A. Programming Mode  
To program the daily schedules, perform the following  
procedure:  
1
. Enter programming mode by pressing the Program but-  
ton. The Occupied 1 annunciator will appear on the ther-  
mostat display. See Fig. 5. Use the UP ARROW and  
DOWN ARROW buttons to set the maximum number  
of Occupied periods available. The thermostat can be  
set to 1, 2, or 3. After the number of Occupied periods  
has been selected, press the Mode button.  
Fig. 6 — Start Time Display  
8
9
. The Stop Time for Occupied 1 will be displayed. Use  
the UP ARROW and DOWN ARROW buttons to raise  
or lower the time until the desired Stop Time is shown.  
Press the Mode button.  
2
. The cooling set point for Occupied 1 will be displayed.  
Use the UP ARROW and DOWN ARROW buttons to  
raise or lower the cooling set point until the desired  
temperature is shown. The range of acceptable values  
is 35 to 99 F (1 to 37 C). Press the Mode button to con-  
tinue. See Fig. 5.  
. The On/Off icon will be displayed. Use the UP ARROW  
to turn the Occupied 1 period ON for this day. Use the  
DOWN ARROW to turn the Occupied 1 period OFF for  
this day.  
1
1
0. Repeat Steps 2 through 9 to program the remain-  
ing schedule for occupied periods 2 and 3 (if selected in  
Step 1).  
1. The Copy command can be used to copy the previous  
day’s schedule if the schedules are the same. The copy  
command becomes available after all the occupied  
periods are programmed in a day. Use the UP ARROW  
to change the copy command to YES. Use the DOWN  
ARROW to change the copy command to NO. Press the  
Mode button when the choice has been made. See  
Fig. 7.  
If NO was selected, the schedule will automatically  
change to the next day and the user must enter the  
occupied and unoccupied schedules for that day.  
Fig. 5 — Setting Occupied 1 Set Points  
NOTE: Occupied 1 schedule heating and cooling set points  
are the same for each day. Occupied 2 and 3 set points may  
be set to different values for each day of the week.  
3
4
. The heating set point for Occupied 1 will be displayed.  
Use the UP ARROW and DOWN ARROW buttons to  
raise or lower the heating set point until the desired  
temperature is shown. The range of acceptable values  
is 35 to 99 F (1 to 37 C). Press the Mode button to con-  
tinue. See Fig. 5.  
If YES was selected, the schedule will be copied to the  
next day. The schedule copy may be repeated until Sun-  
day is reached. The Sunday schedule cannot be copied  
to Monday.  
. The cooling set point for Unoccupied will be displayed.  
Use the UP ARROW and DOWN ARROW buttons to  
raise or lower the cooling set point until the desired  
temperature is shown. The range of acceptable values  
is 35 to 99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied cool-  
ing). Press the Mode button to continue.  
1
2. After all the times and set points for each day have  
been entered, press the Program button to finish  
entering the schedule.  
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NOTE: The thermostat will continue to follow the schedule  
IV. FAN OPERATION  
until a new one is entered.  
If Fan On is selected, the fan will run continuously during  
occupied schedule (except when Mode is switched to OFF).  
The fan will be off during unoccupied schedule except during  
heating or cooling operation.  
If only one occupied schedule is selected, the Occupied 2  
and 3 schedules are skipped.  
If the start time is set later in the day than the stop time,  
the program will run from midnight of that day to the stop  
time and then from the start time to midnight.  
If the same start and stop times are programmed for an  
occupancy schedule, the thermostat will be in Occupied mode  
for 24 hours.  
If Fan On is not selected, the fan will only operate during  
heating or cooling operation.  
V. EMERGENCY HEAT  
Emergency heat is available for heat pump applications. To  
turn on emergency heat, press and hold the Fan button. While  
holding the Fan button, press the UP button for 2 seconds.  
An ‘‘EH’’ will be displayed. During emergency heat, the fan  
will operate and the second stage of heat will be energized  
If one occupied period starts or stops within another occu-  
pied period, the lower numbered schedule has priority. For  
example, if schedule Occupied 3 is running for 24 hours  
and occupied schedule 2 comes on from 1 to 3 PM, the set  
points from Occupied 2 are in effect from 1 to 3 PM.  
(locking out the first stage compressor). To exit emergency  
B. Overriding the Schedule  
heat, press and hold the Fan button. While holding the Fan  
button, press the UP button for 2 seconds. During emergency  
heat, only OFF and HEAT modes are available.  
The schedule can be overridden during operation by pressing  
the UP or DOWN ARROW buttons to change the desired tem-  
perature. The thermostat will use the new set point until the  
next scheduled time period starts.  
VI. ELECTRIC HEAT  
When the Electric Heat option in the advanced set up is set  
to ON (configured by installer), the thermostat will turn on  
the fan immediately any time there is a heat demand. This  
feature should only be used on electric heating applications.  
Do not use with gas heat.  
VII. HOLIDAY MODE  
When the thermostat is in Holiday mode, the thermostat will  
operate under Unoccupied set points. To configure and acti-  
vate the Holiday mode, press the Holiday button. The ‘‘HOL’’  
icon will be displayed along with the remaining days of Holi-  
day mode operation. Press the UP or DOWN ARROWS to  
select the number of days that the holiday schedule will be in  
effect. A value of 0 disables Holiday mode. The duration can  
be set from 1 to 99 days. The thermostat will enter Holiday  
mode on midnight of the next day after the mode has been  
activated. Holiday mode will remain in effect until midnight  
of the last configured day.  
Fig. 7 — Copy Command Display  
OPERATION  
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 thermostat will  
enter Heating or Cooling mode based on the room tempera-  
ture and the heating and cooling set points. If PROGRAM  
ON is selected, the stored schedule is enabled and the ther-  
mostat will follow the Occupied and Unoccupied schedules  
stored in its memory.  
If the Holiday mode is in effect, the number of days remain-  
ing will blink on and off and the ‘‘Unoccupied’’ icon will be  
displayed. The Override button will be active during Holiday  
mode. The Dry Contact Switch is ignored.  
To turn off the Holiday mode before the remaining config-  
ured days have passed, press the Holiday button to enter into  
the configuration mode. Press the DOWN ARROW to set the  
number of days to zero. Holiday mode will be disabled.  
VIII. DRY CONTACT SWITCH  
I. AUTO-CHANGEOVER  
A dry contact switch is provided to allow an external device  
to force the thermostat into Occupied 1. When the thermo-  
stat is forced into Occupied 1 via the dry contact closure, the  
Occupied 1 icon will blink each second.  
When the thermostat mode is set to AUTO, the thermo-  
stat will provide automatic changeover from Heating to Cool-  
ing mode and Cooling to Heating mode when required. The  
thermostat will automatically switch to maintain the desired  
temperature setting. The thermostat does not need to be manu-  
ally changed from heating to cooling or cooling to heating  
operation.  
A. Soft Start  
When multiple thermostats are controlled by the same exter-  
nal device, a Soft Start option can be used to stagger the turn  
on times of the HVAC equipment. This feature may cause a  
delay in operation after entering Occupied 1.  
II. TWO-STAGE OPERATION  
The second stage of heat or cool is turned on when the first  
stage has been on for a minimum of 2 minutes and the tem-  
perature differential from the set point is equal to or greater  
than the set point plus the deadband plus 2 degrees.  
IX. REMOTE TEMPERATURE SENSOR  
A remote temperature sensor is available to read the tem-  
perature from a space. If a remote temperature sensor is  
connected, the thermostat will ignore the reading of its  
internal sensor. When the thermostat is using a reading from  
a remote sensor, the degree symbol above the temperature  
reading will blink.  
III. CLOCK BACKUP  
In the event of a power loss, the thermostat will keep  
time for a minimum of 48 hours without external power or  
batteries.  
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Table 1 — Daily Schedule Planner  
SCHEDULE  
Occupied 2  
DAY  
OF THE  
WEEK  
Occupied 1  
Occupied 3  
Unoccupied  
Start / Stop / Heat / Cool  
Start / Stop / Heat / Cool  
Start / Stop / Heat / Cool  
Heat / Cool  
Monday  
Tuesday  
Wednesday  
Thursday  
Friday  
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Saturday  
Sunday  
NOTE: The cooling temperature set point must be higher than the heating temperature set point.  
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Copyright 1998 Bryant Heating & Cooling Systems  
Printed in U.S.A.  
CATALOG NO. 809-692