Prostat OEM Series User guide
Installer Manual
Non-Programmable Thermostats
PSP1100 Up to 1-heat / 1-cool
PSP2100 Heat Pump, Up to 2-heat / 1-cool
1 Specifications 2 Safety Warnings 3 About Your Thermostat
4 Preparation & Installation 5 Sample Wiring & Jumpers
6 Test Operations 7 Troubleshooting 8 Warranty
Follow Installation Instructions carefully. Disconnect Power to the
Heater/Air Conditioner before removing the old thermostat and
installing the new thermostat.
CAUTION
WARNING
1 Specifications
model PSP1100
• Manual-changeover
• 1 heat, 1 cool
• Non-programmable
• Compatible with gas/elec, millivolt, and heat pump systems with no aux heat
• Battery or 24vac system powered
model PSP2100
• Manual-changeover
• 2 heat, 1 cool
• Non-programmable
• Compatible with heat pumps with 2nd stage aux heat
• Battery or 24vac system powered
© Copyright 2021, All Rights Reserved
3 Installer Guide
Table of Contents
2 Safety Warnings
Safety Warnings............................................................4
3 About Your Thermostat
Front Panel ...................................................................5
Display ......................................................................6
Normal Operation..........................................................7
Fahrenheit or Celsius ....................................................8
Aux Heat.......................................................................9
4 Preparation and Installation
Remove Old Thermostat..............................................10
Battery Replacement ..................................................11
Wire Connections........................................................12
Thermal Insulating Sheet ............................................13
5 Sample Wiring Diagrams
Sample Wiring Diagrams for PSP1100 ........................14
Sample Wiring Diagrams for PSP2100 ........................16
Jumper Configuration .................................................17
6 Test Operation ......................................................18
7 Troubleshooting ...................................................20
8 Warranty ...............................................................21
Installer Guide 4
The two Alkaline “AA” batteries must be replaced at least once every 12
months to ensure proper operation. The Low Battery icon will appear on the
display when it is time to replace the batteries. If the thermostat is connected
to 24v power, the batteries should still be installed, but are not required.
When “Low Battery” is displayed the batteries must be replaced immediately.
The manufacturer cannot be liable for improper operation of the thermostat if
the batteries are not immediately replaced.
Annual battery replacement is especially critical in locations subject to
freezing temperatures. The thermostat will be unable to turn on the heating
system if the batteries are exhausted.
This device complies with Part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
Follow Installation Instructions carefully.
DISCONNECT POWER TOTHE
HEATER - AIR CONDITIONER
BEFORE REMOVING THE OLD
THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
2 Safety Warnings
5 Installer Guide
3 About Your Thermostat
1Front Panel
COOLER &
WARMER
BUTTONS
DISPLAY
HEAT
BATTERIES
COOL
OFF
FAN
HEAT
AUTO
ON
On or Auto
FAN SWITCH
BI-COLOR LED
Heat or Cool demand
indicator when system
powered: Red = Heat
Green = Cool
MODE SWITCH
Cool, Off, or Heat
BATTERY
DOOR
AUX HEAT
NORM
EMRGC’Y LOCKOUT
(AUX HEAT
on PSP2100
model only)
Installer Guide 6
Display
1Heat and Cool indicators. In normal operation, Heat or Cool
appears, depending on the Mode Switch position. When heat or
cool is energized, the Heat or Cool indicator will flash.
2Current room temperature.
3Desired set temperature indicator.
When this indicator is on, the large numbers represent the
desired room temperature. Pressing the COOLER or WARMER
button during normal operation will cause the large numbers
to switch from the current room temperature to the desired set
temperature.
4Indicates battery life is low; it is recommended to replace the
batteries at this time.
5Indicates auxiliary heat is energized. (PSP2100 only)
SET TEMP
LOW
BATTERY
HEAT
AUX
COOL 88
7 Installer Guide
1Select Cool or Heat with the Mode Switch.
2Normally leave the fan switched to Auto.
In Fan Auto, the fan will turn on only with a heat or cool demand.
When Fan On is selected, the fan will run continuously.
3Adjust the desired set temperature with the
COOLER and WARMER buttons.
Operation
2Normal Operation
COOLER &
WARMER
BUTTONS
HEAT
BATTERIES
COOL
OFF
FAN
HEAT
AUTO
ON
On or Auto
FAN SWITCH
MODE SWITCH
Cool, Off, or Heat
AUX HEAT
NORM
EMRGC’Y LOCKOUT
Installer Guide 8
COOLER & WARMER
BUTTONS
HEAT
BATTERIES
COOL
OFF
FAN
HEAT
AUTO
ON
MODE SWITCH
Cool, Off, or Heat
AUX HEAT
NORM
EMRGC’Y LOCKOUT
1Select Off with the Mode Switch.
2Press and hold the COOLER and WARMER buttons at the same
time until the temperature is displayed in degrees Celsius.
3Repeat this process to display the temperature in degrees
Fahrenheit.
Operation
3Fahrenheit or Celsius
9 Installer Guide
4Aux Heat (PSP2100 only)
HEAT
BATTERIES
COOL
OFF
FAN
HEAT
AUTO
ON
AUX HEA
T
SWITCH
AUX HEAT
NORM
EMRGC’Y LOCKOUT
Emergency - Disables all compressor functions* and energizes only
Aux Heat to satisfy the heat demand.
Normal - Aux Heat is allowed to run, if necessary, along with the heat
pump to satisfy the heat demand.
Lockout - Aux Heat will never turn on regardless of the heat demand.
*When the Aux Heat switch is in the Emergency position the
compressor will also be locked out during cooling operation.
Installer Guide 10
• Proper installation of the thermostat will be accomplished by following
these step by step instructions. If you are unsure about any of these steps,
call a qualified technician for assistance.
• These tools will be required:
• Make sure your Heater/Air Conditioner (Heat Pump for PSP2100) is working
properly before beginning installation of the thermostat.
• Carefully unpack the thermostat. Save the screws and instructions.
• Turn off the power to the Heating/Air Conditioning (or Heat Pump for
PSP2100) system at the main fuse panel. Most residential systems have a
separate breaker for disconnecting power to the furnace.
Flat Blade
Screwdriver
Wire Cutter
& Stripper
4 Preparation and Installation
Remove & Replace Old Thermostat
• Remove the cover of the old thermostat. If it does not come off easily check
for screws.
• Loosen the screws holding the thermostat base or subbase to the wall, and
lift away.
• Disconnect the wires from the old thermostat. Tape the ends of the wires as
you disconnect them, and mark them with the letter of the terminal for easy
reconnection to the new thermostat.
• Keep the old thermostat for reference purposes, until your new thermostat
is functioning properly.
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