3. Press the or button to change the time to the desired hour in 1 hour
increments. Press the PROG button to save. The minute portion of the set point
time will begin flashing.
4. Press the or button to change the time to the desired minute in 10-minute
increments. Press the PROG button to save. The temperature digits will
begin flashing.
5. Press the or button to change the set point temperature to the desired setting
in 1˚ F increments (0.5˚ C). Press the PROG button to save. The thermostat will
now display the DAY set point time and temperature. Again, you will see the hour
portion of the set point time and the AM/PM indicator will be flashing.
6. Follow steps 3 through 5 to set the set point times and temperatures for the
MORN, DAY, EVE and NIGHT set points for the Weekday group in the HEAT
mode.
7. After pressing the PROG button, you will enter the Weekend Program Group.
The display will show SA, SU to indicate the Weekend group is being
programmed. The hour portion of the MORN set point time and the AM/PM
indicator will be flashing.
8. Follow steps 3 through 5 to set the set point times and temperatures for the
MORN, DAY, EVE and NIGHT set points for the Weekend group in the HEAT
mode.
9. Place the system switch in the COOL mode of operation. The display will show
COOL. Follow steps 2 through 8 to program the set point times and temperatures
for the Weekday and Weekend groups in the COOL mode.
NOTE: To erase all entered programs, current time of day, day of week and other
user settings, gently press the RESET button using a paper clip or a small pencil
tip. This will return all thermostat settings to their default values.
Review Set Temperature
1. Press and hold the or button. The
current set point temperature will be
displayed in place of the current room
temperature, and the indicator SET will
be displayed.
2. The display will return to normal operating
mode when the or button is released.
Continuing to hold the or button for 1 second or longer will allow the user
to temporarily override the current programmed set point.
Temporary Program Override
1. Press and hold or button for 1 second
or longer. The entire display will flash
once and the SET indicator will be
displayed. Release the or button and
press the or button again as desired
to adjust the set temperature.
2. The display will return to normal operating mode after 15 seconds or you can
press the RETURN button.
3. The program indicator (MORN, DAY, EVE or NIGHT) will be flashing in the
display, indicating that a Temporary Program Override is in effect. The Temporary
Program Override will reset when the next set point time occurs or after four
hours–whichever comes first.
WARNING
Important Safety Information
2
3
4
1
Installing New Thermostat
Replacing Existing Thermostat
WARNING!
Read BEFORE Testing
Default Thermostat Settings
Setting Thermostat User Options
Setting Current Time of Day and Day of Week
5 6
8
Setting the Extended Hold Time (see also section 6)
cont.
Builder Series
Programmable Thermostats
Single Stage 1 Heat / 1 Cool
Conventional and Heat Pump
Multi-Stage 2 Heat / 1 Cool
Conventional and Heat Pump
• Always turn off power to the air conditioning or heating system prior to
installing, removing, cleaning or servicing thermostat.
• This thermostat is a dual power thermostat and either requires 24 Volts AC
Power or two (2) properly installed “AA” alkaline batteries for normal operation
and control of the heating or cooling system. Refer to “Low Battery Detection
and Replacement” section for more information.
• This thermostat also requires two (2) properly installed “AA” alkaline batteries
to retain clock setting in the event of loss of AC Power due to a power outage
or rolling blackouts when used as a hardwired thermostat.
• This thermostat should only be used as described in this manual. Any other
use is not recommended and will void the warranty.
Specifications
Installation
Testing Your New Thermostat
Programming User Settings
Temperature Adjustment
Additional Operation
Features
Battery Replacement
Troubleshooting
Wiring Diagrams
1
2
3
4
5
6
7
8
9
1
Specifications
• Electrical Rating: 24 Volt AC (18-30 Volt AC)
1 amp maximum load per terminal
2 amp total maximum load (all terminals) (PSTS11P52)
3 amp total maximum load (all terminals) (PSTS21P52)
• Control Range: 45˚ - 90˚ F (7˚ - 32˚ C)
• Accuracy: +/- 1˚ F (+/- .5˚ C)
• AC Power: 18-30 Volt AC
• DC Power: 3.0 Volt DC (2 AA Alkaline batteries included)
• Model PSTS11P52: Compatibility with low voltage single stage gas, oil or
electric heating or cooling systems, including single stage heat pumps; can
also be used on 250mv to 750mv millivolt heating only systems.
• Model PSTS21P52: Compatibility with low voltage multi-stage gas, oil or
electric heating or cooling systems, including multi-stage heat pumps.
• Model PSTS11P52 Terminations: Rc, Rh, B, O, Y, W, G, C
• Model PSTS21P52 Terminations: R, O, B, C, Y1, E/W1, G, W2
1
Specifications
cont.
Installation
2
Installation
2
cont.
NOTE: If installing this thermostat in a new installation, locate the thermostat
4 to 5 feet above the floor in accordance with applicable building codes. Install the
thermostat in a location that provides good airflow characteristics and avoid areas
behind doors, near corners, air vents, direct sunlight or heat generating devices.
Installation in these areas could impact thermostat performance. Wiring must
conform to all building codes and ordinances as required by local and national code
authorities having jurisdiction.
1. Always turn off power to the air conditioning or heating system prior to installing
thermostat.
2. Place system switch on front of thermostat to the OFF position.
3. Place fan control switch on front of thermostat to the AUTO position.
4. Remove front of thermostat body from sub-base by pressing release latch on
bottom of thermostat.
5. Place the thermostat sub-base against wall in the desired thermostat location.
6. Guide thermostat wires through hole in sub-base and continue to hold against
wall.
7. Mark placement of mounting holes as appropriate and drill using a 3/16" drill bit.
8. Gently tap supplied plastic anchors into the holes in the wall.
9. Place the thermostat sub-base against the wall in the desired location, making
sure the mounting holes are aligned and the thermostat wires are inserted
through the opening in sub-base.
10. Fasten sub-base to wall using supplied screws.
11. Connect wires to quick wiring terminal block using the new terminal designations.
Refer to Wiring Diagram in section 9 of this manual for assistance.
12. Make sure all of the wire connections are secure and are not touching any other
terminal to prevent electrical shorts and potential damage to the thermostat.
13. Turn the front thermostat body over, exposing the rear view of the circuit board.
14. Locate the internal ˚F / ˚C switch on the circuit board. Using your fingers, flip the
switch toward the preferred temperature ˚F / ˚C scale.
15. Locate the internal fan option switch, HG (Gas) / HE (Elec) on the circuit board.
This switch controls the heating system fan delay. Select gas for gas or oil fired
systems. This will allow the furnace to run for a few seconds before initiating the
fan. Select electric for electric heat systems that require the fan to come on
immediately. Using your fingers, flip the switch toward HG (Gas) or HE (Elec).
16. Locate the internal NORM / HP switch on the circuit board. This switch configures
the thermostat for conventional (NORM) heating and cooling systems or heat
pump (HP) systems. Using your fingers, gently flip the switch toward NORM or HP.
17. Attach front body of thermostat to sub-base of thermostat, being careful to
align the terminal pins on the front body with the terminal block on the sub-base.
Installation
2
cont.
Testing Your New Thermostat
3
• Do not short (or jumper) across terminals on the gas valve or at the heating or
cooling system control board to test the thermostat installation. This could
damage the thermostat and void the warranty.
• Do not select COOL mode if the outside temperature is below 50˚ F (10˚ C).
This could damage the controlled cooling system and cause personal injury.
• This thermostat includes an automatic compressor protection feature to avoid
potential damage to the cooling system from short cycling. This thermostat
automatically provides a 5-minute delay after turning off the cooling or heating
system output to protect the compressor.
NOTE: Test your thermostat prior to programming any user settings. Pressing the
RESET button will erase any user entries previously programmed and return them to
their default values.
1. Place the system switch in the HEAT position.
2. Press and hold the button on the keypad until the set point temperature setting
is a minimum of 3 degrees higher than the current room temperature. The
heating system should start within several seconds. The fan may not turn on
immediately due to the heating system built-in fan delay.
3. Place the system switch in the OFF position. The heating system should stop
within several seconds with conventional heating or cooling systems. On heat
pump systems you must wait 5 minutes for the automatic compressor short
cycle protection period to expire, or press the RESET button to bypass this
feature for initial testing purposes. Pressing the RESET button will erase any
user program settings.
4. Place the system switch in the COOL position.
5. Press the button on the keypad until the set point temperature is a minimum
of 3 degrees lower than the current room temperature.
6. The cooling system should start within several seconds. Place the system switch
in the OFF position. The cooling system should stop within a few seconds.
7. Place the fan switch in the ON position. The system blower should start.
8. Place the fan switch in the AUTO position. The system blower should stop.
Programming User Settings
4
NOTE: It is important for you to set the current time of day (note AM/PM indicator
in display), and the current day of week correctly to avoid problems with
program execution.
1. When in normal operating mode, press the
DAY/TIME keypad button. The LCD display
will be cleared except for the time, am/pm
indicator and the day of the week. The
hour portion of the time will flash. Press
the or button to set the current hour.
2. Press the DAY/TIME button again. The minute portion of the time will flash.
Press the or button to set the current minute.
3. Press the DAY/TIME button again. The day of the week indicator will flash.
Press the or button to set the current day of the week.
4. Press the DAY/TIME button again and the thermostat will return to normal
operating mode.
Programming User Settings
• This thermostat is pre-programmed with energy efficient weekday and weekend
set point times and temperatures. These settings provide efficient energy savings
during normal heating and cooling modes of operation. If you wish to use the
settings in the table, no further programming is necessary. Review these time
and temperature settings prior to establishing your personal program settings to
maximize your savings, and minimize programming requirements.
• Make sure you place the system switch in the HEAT or COOL modes of
operation as appropriate. You should not enter a program in the OFF position.
• When you place the system switch in the COOL or HEAT modes of operation,
the appropriate indicator will also appear in the LCD display when the system
is running.
• When you place the system switch in the OFF mode the display will indicate OFF.
Programming Overview
Your thermostat contains separate Weekday and Weekend Program Groups that
allow you to change the daily set point times and temperatures to meet your
individual schedule needs.
Weekday - allows you to program all the weekdays (M, TU, W, TH, F will show in
display) at the same time. Allows programming times and temperature settings for
four set points (MORN, DAY, EVE and NIGHT) to meet your weekday schedule
needs.
Weekend - allows you to program all the weekend days (SA, SU will show in the
display) at the same time. Again allows programming times and temperature settings
for four set points (MORN, DAY, EVE and NIGHT) to meet your weekend schedule
needs.
Entering Your Program
1. Place the system switch in the HEAT
mode of operation.
2. Press the PROG button to enter Program
setting mode. The MORN set point of
the Weekday Program Group will be
displayed. The display will show M, TU,
W, TH, F to indicate the Weekday group is being programmed. The hour portion
of the set point time and the AM/PM indicator will be flashing.
MODEL
NOTE: The thermostat will return to normal operating mode automatically after 30
seconds if no key is pressed. It will also return to normal operating mode
immediately if the RETURN button is pressed.
The default user options are compatible with most systems and applications. They
are normally set at the time of installation and usually do not require modification
under normal operating conditions. If you wish to change these settings, simply
follow the instructions below.
Setting First Stage Differential
NOTE: The temperature differential settings are the same for both the heating
and cooling systems.
The default setting is 0.5˚ F (0.25˚ C).
The room temperature must change .5˚ F
(0.25˚ C) from the set point temperature
before the thermostat will initiate the
system in heating or cooling.
1. In normal operating mode, press and hold the RETURN button for 4 seconds.
The LCD display will show "SET D1 x˚", where "x" equals the ˚F / ˚C
differential setting. This is the current first stage differential setting.
2. Press the or buttons to set the first stage differential to your desired
setting of .5˚, 1˚, or 2˚ F (.2˚, .5˚ or 1˚ C).
NOTE – MODEL PSTS11P52: Once you have finished setting the first stage
differential, you can wait 15 seconds and the thermostat will return to the normal
operating mode. Or you can press the RETURN button to return to normal
operating mode.
NOTE – MODEL PSTS21P52:
If you do not wish to change the second stage
differential,
wait 30 seconds and the thermostat will automatically return to the
normal operating mode.
Setting Second Stage Differential (Model PSTS21P52)
The default setting is 2˚ F (1.0˚ C). The room
temperature must change 2˚ F (1.0˚ C) in
addition to the first stage differential setting
before the thermostat will initiate the
second stage of the system in heating.
1. Press and hold the RETURN button again and the LCD display will show “SET
D2 x˚”, where “x” equals the ˚F / ˚C differential setting. This is the current
second stage differential setting.
2. Press the or buttons to set the second stage differential to your desired
setting of 2˚, 3˚, 4˚, 5˚ or 6˚ F (1˚, 1.5˚, 2˚, 2.5˚ or 3˚ C).
NOTE – MODEL PSTS21P52: Once you have finished setting the second stage
differential, wait 30 seconds and the thermostat will return to the normal
operating mode.
NOTE: To erase all user program settings, gently press RESET button using a
paper clip or a small pencil tip. This will return all thermostat settings to their
default values, erasing all program settings entered by the user.
cont.
Programming User Settings
The default setting is Long (indefinite) Hold.
If the HOLD feature is activated, the current
set point will be held until HOLD is released.
1. In normal operating mode, press and
hold the RETURN button for 4 seconds.
Press RETURN again to skip past
differential setting. The display will show “HOLD LG”, where LG is indefinite hold.
2. Press the or button to change the Extended Hold time from indefinite (LG)
to 24 hours (SH).
3. Press the RETURN button again to set the Filter Check Monitor or wait 30
seconds for the thermostat to return to the normal mode.
Setting Filter Check Monitor (see also section 6)
The default setting is 0 days (Filter monitor
disabled).
1. In normal operating mode, hold the
return button for 4 seconds. Press
RETURN button repeatedly until “XXX
SET FILT” is shown where XXX is the Filter Monitor interval.
2. Press the or button to change the Filter Monitor interval to the desired
value of 0 (disabled), 30, 60, 90, 120, or 180 days.
3. Press the RETURN button again to set the Adaptive Recovery Mode or wait
30 seconds for the thermostat to return to the normal mode.
Setting Adaptive Recovery Mode (ARM™) (see also section 6)
The default setting is OFF (Adaptive
Recovery Mode disabled).
1. In normal operating mode, press and
hold the RETURN button for 4 seconds.
Press RETURN repeatedly until “SET
XXX” is shown where XX is the Adaptive
Recovery Mode.
2. Press the or button to change the Adaptive Recovery Mode to either
ON or OFF.
3. Press the RETURN button again or wait 15 seconds for the thermostat to
return to the normal mode.
Setting Your Energy Saving Programs – Tips Before Starting
• It is important for you to set the current time of day (note the AM/PM
indicator in the display), and the current day of week correctly to avoid
problems with program execution. This must be done prior to entering any
program settings.
• The heating and cooling programs have both separate set point times and
set point temperatures.
cont.
Programming User Settings
Temperature Adjustment
5
18. Open front thermostat door and open battery compartment door.
19. Install two new "AA" alkaline batteries. Locate the positive (+) ends of the
batteries and match them with the positive (+) terminals located in the battery
compartment. Close battery compartment.
20. Restore system power so you can test installation.
NOTE: If batteries were installed prior to accomplishing steps 14 through 16,
you
will need to reset the thermostat to register thermostat switch configurations
prior
to programming any user settings. Gently press the RESET button on the front of
the thermostat using a paperclip or a small pencil tip.
44
Weekday
Weekend
Before Installing, Programming or Operating,
PLEASE READ ALL INSTRUCTIONS
cont.
Programming User Settings
4
4
7
NOTE – MODEL PSTS21P52: If the thermostat is configured for a conventional
system and the system switch is in the EMER position, the unit will still function in
a conventional 2 stage HEAT mode, but the display will flash NO AUX SET.
Old Terminal from
Existing Thermostat
New Terminal for
New Thermostat
(PSTS11P52)
New Terminal for
New Thermostat
(PSTS21P52)
Terminal
Description
V or Rc Rc Cooling
Transformer
M, 4, Rh, or R Rh Heating
Transformer
R, V-VR or VR-R R 24 VAC
B B B Reversing Valve
(Heating)
O O O Reversing Valve
(Cooling)
Y, Y1 or M Y Y1 Cooling or
Compressor for
HP System
E, H, W, W1 or 4 W E/W1 1st Stage Heat
or Emergency Heat
G or F G G Fan Control
C, X or B C C 24 VAC Common
W1, W2 or W-U W2 2nd Stage Heat
Function Status After Reset
Operation Mode Normal Operating Mode
Temperature Hold
Permanent and Temporary Hold Cleared
Clock 12:00 p.m., Monday
Room Temperature 70˚ F (21.0˚ C), to be renewed within
5 seconds
Set Point Temperature According to System Switch
62˚ F (17.0˚ C) for Heat and Off
83˚ F (28.0˚ C) for Cool
Temperature Scale ˚F or ˚C dependent on switch setting
Operating Program DAY program, Monday
Low Battery Warning Off, to be renewed within 5 seconds
1st Stage Differential 0.5˚ F (0.25˚ C)
2nd Stage Differential 2˚ F (1.0˚ C)
Short Cycle Protection Timer
Reset
Output Relays Off
Filter Check Monitor 0 days-off
Extended Hold Indefinite
Adaptive Recovery Mode Off
PSTS11P52
MODEL
PSTS21P52
NOTE–MODEL PSTS11P52: This thermostat is designed for use with 24 Volt-AC
low voltage single stage gas, oil or electric heating or cooling systems, including
single stage heat pumps and can also be used on 250mv to 750mv millivolt heating
only systems. Do not use this thermostat on applications with voltages above 30
Volts AC.
NOTE–MODEL PSTS21P52: This thermostat is designed for use with 24 Volt-AC
low voltage multi-stage gas, oil or electric heating or cooling systems, including
multi-stage heat pump systems. Do not use this thermostat on applications with
voltages above 30 Volts AC.
MORN
DAY
EVE
NIGHT
Time: 6:00 pm
Heat: 70˚ F (21˚ C)
Cool: 75˚ F (24˚ C)
Time: 8:00 am
Heat: 62˚ F (17˚ C)
Cool: 83˚ F (28˚ C)
Time: 6:00 am
Heat: 70˚ F (21˚ C)
Cool: 75˚ F (24˚ C)
Time: 10:00 pm
Heat: 62˚ F (17˚ C)
Cool: 78˚ F (26˚ C)
Time: 6:00 pm
Heat: 70˚ F (21˚ C)
Cool: 75˚ F (24˚ C)
Time: 8:00 am
Heat: 70˚ F (21˚ C)
Cool: 75˚ F (24˚ C)
Time: 6:00 am
Heat: 70˚ F (21˚ C)
Cool: 75˚ F (24˚ C)
Time: 10:00 pm
Heat: 62˚ F (17˚ C)
Cool: 78˚ F (26˚ C)
Most thermostats have three parts:
• The cover, which may snap or hinge over the existing thermostat.
• The electronics or body, which controls the existing system.
• The sub-base, where the wires attach through the wall to the existing system.
1. Always turn off power to the air conditioning or heating system prior to
removing existing thermostat.
2.
Carefully remove the cover and electronics body from the old thermostat sub-base.
Depending on the brand, these parts may pull off or need to be unscrewed. The
old sub-base should remain wired and on the wall until steps 4 and 5.
3. Label every old wire with the letter of the connection to which the wire is
attached. Example letters are R, M, Y etc. Depending on the brand of the old
thermostat, your letters may be different.
4. After labeling the old wires, loosen each connection and remove them from old
sub-base. Secure the wires to prevent them from slipping into the hole in the wall.
5. Remove the old sub-base from the wall, again being careful that the wires do
not slip into the hole in the wall.
6. Use the chart below to determine the new thermostat connections. As an
example, if the old thermostat had a G connection, it goes to G on the new
thermostat. Note the chart includes information for Proselect
®
PSTS11P52
and PSTS21P52 thermostats. Be sure to use the correct column for the new
thermostat.
NOTE: When you place the system switch in the COOL or HEAT modes of
operation, the appropriate indicator will also appear in the LCD display when the
system is running. When you place the system switch in the OFF mode, the display
will indicate OFF.
9
10
cont.
11
Temperature Adjustment
5
cont.
Additional Operation Features
6
Resetting the Thermostat
The Reset feature allows the user to completely reset the thermostat to register new
manual switch settings.
1. To erase all entered programs, current time of day, day of week and other user
settings, gently press the RESET button using a paper clip or a small pencil tip.
2. This will return all thermostat settings to their default values and register all
new manual switch settings for proper operation.
Non-Volatile Memory
In the event of a power failure, the Non-Volatile Memory feature allows all settings
to be recovered, eliminating the need to reset temperature and differential settings.
When AC power is restored after an outage, all settings are retrieved
from memory and reinstated.
Status Indicators
HEAT: This will turn on whenever the
system switch is in the HEAT mode.
“HEAT” will flash when the heating
system is running.
COOL: This will turn on whenever the
system switch is in the cool mode.
“COOL” will flash when the cooling
system is running.
AUX: (Model PSTS21P52 Only): This will turn
on when the auxiliary second
stage of heating is active. The
auxiliary stage
of heating is usually
the least economical stage of heat
and typically runs when the first
stage of heat cannot keep up with
the temperature demand.
NOTE: AUX is also displayed when the system is in the Emergency
(EMER) Mode.
Replacing the Batteries
1. Open the thermostat cover and locate the battery compartment door.
2. Remove the two "AA" alkaline batteries located in the battery compartment.
3. Install two new "AA" alkaline batteries into battery compartment. Make sure to
match the positive (+) ends of the batteries with the positive (+) terminals
located in the battery compartment.
4. Close battery compartment and verify that the low battery indicator does not
appear in the display.
Extended Hold (Vacation) Mode
1. Press the HOLD button to bypass the
program schedule. The current set point
temperature will be held either
permanently or for 24 hours, depending
on the setting selection made in section 4.
2. Press the HOLD button again to return the
thermostat to the normal program operation.
3. The hold period will last until the hold is released as in step number 2 above,
or is limited to 24 hours if the default was changed in the User Options Settings
(see section 4).
Compressor Protection
This thermostat includes an automatic compressor protection feature to avoid
potential damage to the cooling system from short cycling. This thermostat
automatically provides a 5-minute delay after turning off the cooling system
output to protect the compressor. This protection is also present in the heat mode
of operation on single stage heat pump systems to protect the compressor.
NOTE: The installer can reset the thermostat and bypass the compressor
protection features by pressing the RESET button. This will erase all entered
programs, current time of day, day of week and other user settings and should
only be used during installation for testing purposes or to reset a thermostat
to regain normal operation. This will return all thermostat settings to their
default values. The user will have to re-program all of the erased settings.
Low Battery Detection and Replacement
This dual power thermostat requires two (2)
new, properly installed “AA” Alkaline batteries
to maintain the system clock and to provide
proper thermostat power when 24 volt AC
power fails or is not connected to the
thermostat. When the batteries start to become
too weak to provide proper operation, the
thermostat will begin to display a 3 stage low battery indicator.
Low Battery Stage Battery Indicator Duration Action
Stage 1 Solid 0-30 Days Replace Batteries
as Soon as Possible.
Stage 2 Flashes Every 31-60 Days Replace Batteries
2 Seconds Immediately to
Provide Proper
Operation.
Stage 3 Flashes Every 61-90 Days Replace Batteries
1 Second Urgently to
Provide Proper
Operation.
Symptom: Thermostat turns heating or cooling system on too often or not
often enough.
Potential Solution: Increase or decrease first stage temperature differential
setting as appropriate to provide the desired performance level. See section 4.
Symptom: Low battery indicator is shown in thermostat display.
Potential Solution: Replace batteries immediately to maintain proper system
operation. See section 7.
Symptom: OFF is shown in thermostat display and heating or cooling system will
not start.
Potential Solution: This indicates that the system is turned off at the thermostat.
The thermostat must be in HEAT or COOL modes of operation to control the
heating or cooling system. Move the system selector switch to the HEAT or
COOL position.
Symptom: Thermostat display is blank.
Potential Solution: It is possible that AC power is not present at the thermostat
or the batteries are drained. Check fuse, circuit breaker and thermostat wiring
as appropriate to verify AC power is available. Replace batteries before
reprogramming thermostat. See section 5. If AC power is present, call a
professional service technician to verify thermostat and system performance.
Symptom: HI is shown in the thermostat
display where the room temperature is
normally displayed.
Potential Solutions: The temperature
sensed by the thermostat is higher than the
99˚ F (37˚ C) upper limit of the thermostat’s
display range. The display will return to normal after the sensed temperature
lowers within the 40˚ to 99˚ F (5˚ to 37˚ C) display range. Turn on the cooling system
or use other methods to lower the temperature accordingly.
This condition could occur from the system being turned off during an exceptionally
warm period or upon installation when the thermostat has been stored for a long
period of time in a warm vehicle or location prior to being installed.
Symptom: LO is shown in the thermostat
display where the room temperature is
normally displayed.
Potential Solutions: The temperature
sensed by the thermostat is lower than the
40˚ F (5˚ C) lower limit of the thermostat’s
display range. The display will return to normal after the sensed temperature rises
within the 40˚ to 99˚ F (5˚ to 37˚ C) display range. Turn on the heating system to
raise the temperature as needed for comfort within the room.
This condition could occur from the system being turned off during a cold weather
period or upon installation when the thermostat has been stored for a long period
of time in a cold vehicle or location prior to being installed. The thermostat should
be allowed to warm up prior to installation to allow proper heating control once
installed.
Troubleshooting
8
12
Symptom: Cannot program a set point temperature higher than 90˚ F (32˚ C).
Potential Solution: This is above the normal thermostat temperature setting
range of 45˚ to 90˚ F (7˚ to 32˚ C).
Symptom: Cannot program a set point temperature lower than 45˚ F (7˚ C).
Potential Solution: This is below the normal thermostat temperature setting
range of 45˚ to 90˚ F (7˚ to 32˚ C).
Symptom: Fan continues to run all the time whether the system is on or off.
Potential Solution: Check that the fan control switch is in the AUTO position.
This will allow the fan to run only when the heating or cooling system is turned
on and running.
Check thermostat wiring to make sure that the fan control wiring is connected to
the correct terminals on the wiring terminal block. See section 8.
Symptom: The room is too warm or too cold.
Potential Solution: See section 4 of this manual to verify the current set point
and make any changes that are necessary.
Symptom: System turns on prior to the end of a setback period.
Potential Solution: Thermostat is in Adaptive Recovery Mode. See section 6.
Symptom: NO AUX SET is shown in the thermostat display.
Potential Solution: The thermostat (model PSTS21P52 only) is configured for a
conventional system, and the system switch is in the EM HEAT position. The unit
will still function in a conventional 2 stage HEAT mode, but the display will flash
NO AUX SET. Move the system switch to the HEAT position.
Troubleshooting
8
cont.
cont.
STORE THIS BOOKLET FOR FUTURE REFERENCE
LIMITED
WARRANTY
This warranty gives you specific legal rights and you may also have other rights that vary from
state to state or province to province. Answers to any questions regarding our limited warranty
may be obtained by writing to our warranty facility.
Warranty Facility: PROSELECT Warranty Center
2215 Cornell Avenue
Montgomery, IL 60538
PSTS11P52 / PSTS21P52: 2 YEAR LIMITED WARRANTY
Ferguson Enterprises, Inc. warrants each new PROSELECT thermostat against any defects that
are due to faulty material or workmanship. This warranty and our liability does not apply to
batteries, nor does it include damage to merchandise or the thermostat resulting from accident,
alteration, neglect, misuse, improper installation or any other failure to follow PROSELECT
installation and operating instructions. This limited warranty applies for the duration of the
warranty period from the original date of purchase by a professional service technician.
Ferguson Enterprises, Inc. agrees to repair or replace at its option any PROSELECT thermostat
under warranty provided it is returned postage prepaid to our warranty facility in a padded
carton within the warranty period, with proof of the original date of purchase and a brief
description of the malfunction. This limited warranty does not include the cost of removal or
re-installation.
cont.
Additional Operation Features
6
The 3 stage low battery indicator is provided to inform the user when the
batteries require immediate attention. We recommend replacing the
batteries as soon as the low battery indicator appears. If the batteries are
not replaced after the low battery indicator first appears, the thermostat
may not provide proper heating or cooling system operation.
Even if the low battery indicator does not appear, the batteries should be replaced
at least once a year, or if you plan on leaving the premises for over a month.
This dual power thermostat can be powered from 24 volts AC or battery power. To
determine if 24 volt AC power is connected to the thermostat, refer to the
installation and wiring diagram section. If you cannot determine how this
thermostat is powered, call a professional service technician to determine the type
of installation and the proper operation of your system.
Adaptive Recovery Mode (ARM
TM
)
In order to maximize comfort and energy efficiency, this thermostat is equipped
with an Adaptive Recovery Mode (ARM™). This feature minimizes the amount
of time required by heating or cooling system to reach the new set point, after a
setback period is completed. This assures your desired temperature is achieved at
your set program times. In the model PSTS21P52, this feature also minimizes the
use of second stage heating.
This feature activates when recovering room temperature from setback programs
to comfort programs, so it will only take place when the current (heating) program
set point temperature is lower than the upcoming program set point temperature,
or the current (cooling) program set point temperature is higher than the upcoming
program set point temperature.
During ARM™, room temperature is recovered gradually by turning on the heating
or cooling before the end of the setback period. The set point temperature is
changed to that of the upcoming comfort program temperature. The start time of
recovery is based on the difference between the current room temperature and the
upcoming comfort program set point temperature. The recovery to the upcoming
set point starts 10 minutes before the upcoming set point time for each degree of
temperature change required, up to a maximum of 2 hours.
ARM™ does not operate when the unit is in the HOLD mode, if the program is
temporarily overridden, or has been turned off in the user settings.
Filter Check Monitor (see section 4 for setting)
The Filter Check Monitor displays a reminder
for required filter replacement or cleaning
by flashing the FILT segment in the display.
See instructions on your filter or heating/
cooling unit for recommendations for
interval setting.
When the selected interval has been reached, and required cleaning or
replacement has been performed, press the RETURN button in any normal mode to
reset the timer and turn off the warning.
Troubleshooting
8
Symptom: The word HEAT or COOL is flashing in the thermostat display.
Potential Solution: This indicates that the heating or cooling system is currently
running. When these systems are not running, HEAT or COOL will not flash.
Symptom: HEAT or COOL is flashing but the system is not running.
Potential Solution: The thermostat is telling the heating or cooling system to run,
but the system is not responding. You may need to call your local heating and air
conditioning contractor.
Symptom: Thermostat does not turn on heating or cooling system.
Potential Solutions: Check to see if OFF is shown in display. This indicates that the
system is turned off at the thermostat. Move the system selector switch to
the HEAT or COOL position. After the compressor short cycle protection 5-minute
period expires the system should start.
Compressor protection feature may be in effect due to compressor short cycle
conditions. See section 6.
Heating or cooling system may be malfunctioning. Call a professional service
technician immediately to verify system operation.
Symptom: Thermostat turns on heating instead of cooling or cooling instead
of heating.
Potential Solution: Check thermostat wiring to make sure that the heating and
cooling stages are connected to the correct terminals on the wiring terminal block.
See section 9.
Symptom: Thermostat will not follow program set points.
Potential Solutions: Check current time of day, day of week program settings.
Make sure to verify AM/PM indicator is accurately displaying desired time settings.
See section 4.
Check to see if OFF is shown in display. This indicates that the system is turned off at
the thermostat. Move the system selector switch to the HEAT or COOL position.
After the compressor short cycle protection period expires the system should start
within several seconds.
Verify your program set point time entries. The heating and cooling programs utilize
the same set point times, but have individual set point temperatures for the MORN,
DAY, EVE and NIGHT set points. See section 4.
Thermostat program has been temporarily overridden and program indicator
is flashing in the display. Press the HOLD button twice to return the thermostat to
normal program operation or wait until next set point and the temporary override will
expire.
Thermostat program is in Extended Hold (Vacation) Mode and HOLD is showing in
display. Press HOLD button to release permanent hold and return the thermostat to
normal program operation.
COOL
AUX
Additional Operation Features
cont.
cont.
Battery Replacement
7
13 14
BACK WHEN FOLDED
Transformer Common
(See NOTE 1)
R Y1 E/W1 W2GO B C
1st Stage
Control
Emergency
Heat Control
Fan
Control
2nd Stage
Heat Control
24 VAC
Neutral
120 VAC
Hot
PSTS21P52: Wiring Diagram for 2 Stage Heat, 1 Stage Cool
Reversing Valve
Active in Cooling
(See NOTE 3)
Reversing Valve
Active in Heating
(See NOTE 3)
See
NOTE 2
NOTE: 1. Transformer Common not required for battery-only operation of thermostat.
2. Jumper is required to use Auxiliary Heat for both Second Stage and Emergency Heat on units
without separate Emergency Heat and Auxiliary Heat terminals. 3. For units requiring reversing
valve to be energized during heating, connect reversing valve to B terminal. For units requiring
reversing valve to be energized during cooling, connect reversing valve to 0 terminal.
24 VAC
120 VAC
Neutral
Hot
Cooling
Heating
120 VAC
Neutral
Hot
24 VAC
C
Rc Rh B
Factory Installed
Jumper
PSTS11P52: Single Stage Conventional Systems (Single Transformer)
O Y W G
Heat
Control
Cool
Control
Rc Rh B
Remove
Factory Installed
Jumper
PSTS11P52: Single Stage Conventional Systems (Dual Transformer)
O Y W G
Heat
Control
Cool
Control
PSTS11P52: Single Stage Heat Pump System
NOTE: 1. Transformer Common not required for battery-only operation
of thermostat. 2. For heating or cooling only system, ignore opposite connection.
3. For 2-wire 24 Volt AC or 250mV - 750mV millivolt heating systems, ignore
cooling connection and fan control.
Fan
Control
Fan
Control
Wiring Diagrams
9
C
Transformer Common
(See NOTE 1)
Transformer Common
(See NOTE)
NOTE: Transformer Common not required for battery-only operation of thermostat.
15
Wiring Diagrams
9
NOTE: 1. Transformer Common not required for battery-only operation of thermostat.
2. For units requiring reversing valve to be energized during heating, connect reversing
valve to B terminal. For units requiring reversing valve to be energized during cooling,
connect reversing valve to 0 terminal.
1st Stage
Heat Control
PSTS21P52: Conventional Systems (Single Transformer)
Transformer Common (See NOTE)
R
B C Y1 E/W1 G W2
2nd Stage
Heat Control
Fan
Control
Cool
Control
NOTE: Transformer Common not required for battery-only operation of thermostat.
Wiring Diagrams
9
16
120 VAC
24 VAC
Neutral
Hot
120 VAC
24 VAC
Neutral
Hot
Compressor
Control
Transformer Common
(See NOTE 1)
B
Reversing
Valve (Active in
Cooling - See
NOTE 2)
O W
C
24 VAC
Reversing
Valve (Active in
Heating - See
NOTE 2)
Y G
Rc Rh
Factory Installed
Jumper
Fan
Control
Neutral
120 VAC
Hot
6
Customer Service: 1-877-309-7959
MODEL
PSTS11P52
MODEL
PSTS21P52
©2010 Ferguson Enterprises, Inc. All Rights Reserved. U.S. Patent 7,438,469 and other patents pending. PSTSP-100-001
2215 Cornell Avenue • Montgomery, IL 60538
Phone 630.844.1968 • Fax 866.268.9994
Contact: Vicky Bohler • vbohler@braeburnonline.com
File:
PSTSP-100-001.ai
Date: 04.15.10
NOTE: If changes are required to this file, please
notify Braeburn Systems BEFORE making them.
Size: 33.75”W x 8”H, folds to 3-3/4”W x 4”H
(857.25mm x 203.2mm, folds to 95.25mm x 101.6mm)
Please make sure warranty page is on back when folded.
Ink: 1 color, Black, 2 sides. Front and back bleeds
Stock: Use existing weight and color (white).
NOTE: Blue keylines do not print.
IMPORTANT - REDUCE THIS ARTWORK 77.5% BEFORE PRINTING.
