Jackson Systems Comfort System T-32-P Universal Thermostat Installation

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Installing the Jackson Systems T-32-P Universal Thermostat is an easy process that offers precise comfort control for a wide range of HVAC systems. This guide will walk you through the installation process—from wiring and switch configuration to system testing—so you can set up your thermostat quickly and safely.

Pre-Installation Tips

Make sure power to the HVAC system is off before touching any wiring.
Gather necessary tools such as:
- Screwdriver
- Drill
- Level
- Wire stripper
Confirm that the HVAC system is compatible so you can set switches properly.

Remove the Thermostat Housing

Step 1—Insert a small coin (like a dime) into the release slot at the bottom of the thermostat.
Step 2—Gently twist the coin to release the thermostat from its subbase.
- NOTE—Be careful not to twist the housing itself to avoid stressing the LCD or bending pins.

Choose the Mounting Location

You should mount the thermostat in an area that’s away from drafts, direct sunlight, near doors, near floors or where there is no air movement.

How to Mount the Subbase

Step 1—Pull the control wires through the large opening in the subbase.
- NOTE—When feeding wires through the wall, make sure to seal the hole behind the thermostat so that draft from inside the wall cavity doesn’t affect the thermostat’s sensor.
Step 2—Level the subbase and attach it to the wall using the provided screws and anchors. Make sure you don’t over-tighten the mounting screws, as this can warp the subbase or misalign connecting pins.

How to Wire the Thermostat

Step 1—Strip and land each wire to its respective terminal on the subbase, being careful not to overtighten the terminal screws.
Step 2—Dress the wires neatly so that they don’t short across terminals.
Step 3—Use the “Typical System Wiring Diagrams” to match your HVAC wiring to the thermostat’s terminal designations:
- W2—Second Stage Heating or Auxiliary Heat
- Y2—Second Stage Compressor
- W1—First Stage Heating
- O/B—Reversing Valve
- Y1—First Stage Compressor
- G—Fan Relay
- R—24 Volt Hot (Jumpered to ‘24’)
- 24—24 Volt Hot (Jumpered to ‘R’)
- 24V—24 Volt Common
- B—Modbus Communications
- A—Modbus Communications
- T—Auxiliary Input Terminal
- T—Auxiliary Input Terminal

How to Activate the Battery

A 3V lithium battery is pre-installed in the thermostat. You’ll need to remove the plastic tab to activate the battery.

How to Set System Switches

There are 8 system switches on the thermostat’s circuit board. Configure these switches to match your HVAC system type and user preferences. Follow the “System Switch Function” guide for standard settings depending on the type of HVAC system the thermostat will control:

Switch 1: Equipment Type
- Heating/Cooling Equipment: OFF
- Heat Pumps: ON
Switch 2: Equipment Stages
- Heating/Cooling Equipment: OFF
- Multi-Stage Equipment: ON
Switch 3: Heat Pump Type
- Conventional: OFF
- Dual Fuel: ON
Switch 4: Reversing Valve
- O Reversing Vale: OFF
- B Reversing Valvl: ON
Switch 5: Fan
- Gas: OFF
- Heat Pump: ON
Switch 6: Thermostat Mode
- Non-Programmable: OFF
- Programmable: ON
Switch 7: Schedules
- 4 Schedules: OFF
- 2 Schedules: ON
Switch 8: Heat Pump Type
- 4-Minute Short Cycles: OFF
- Disabled: ON

How to Test All Functions

Restore power to the HVAC system and wait for the LCD to turn on. Once the thermostat is on, test all functions to verify each output works.

Test fan—Select MODE then FAN, then confirm the fan is on.
Test heating—Raise heat setpoint above room temp, confirm heating relay activates.
Test cooling—Lower cooling setpoint below room temp, confirm cooling relay & fan activate.
Test heat pump mode—Test changeover, compressor stages, reversing valve behavior, emergency heat, etc.

During testing, you can disable time delays by enabling CD = 1 (commissioning mode) in Advanced Installer. After testing, set CD = 0 to re-enable delays.Confirm no short-cycling, proper operation, and that the LCD doesn’t show fault icons during normal operation.

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