So, you have a "gently used" furnace from an era prior to R32 or R454 refrigerant.

The air conditioner needs to be upgraded, but the furnace is new still operating safely, not needing to be replaced.

If the conditions still utilize a traditional "Legacy" style thermostat and control wiring system, here is a solution to achieve the necessary mitigation function required for a system utilizing R-32 refrigerant.

 

* Once the system enters leak mitigation mode, it may stay there approximately 5 minutes, even if the board loses power (i.e. power cycled).

Therefore, it is strongly advised to connect the sensor, before powering up.

If the sensor had a fault, needing to be replaced, it WILL TAKE 5-minutes before the fault clears AFTER the new sensor is installed.

 

 

 

The Non-A2L Furnace Integration Kit was designed to support the HVAC replacement market for systems containing:

1) A Furnace, Indoor Coil and Outdoor Air Conditioner or Heat Pump unit.

or

2) a Modular Blower, Indoor Coil and Outdoor Air Conditioner or Heat Pump unit. If either the indoor coil or outdoor unit needs to be replaced, both must be upgraded to R-32 models. If the furnace or modular Blower is still operational, it does not need to be replaced.

 

NON-A2L FURNACE INTEGRATION KIT

PRE-CHECKS

 

The NON-A2L FURNACE INTEGRATION KIT works successfully if the following are true for the thermostat and furnace or modular blower. While these conditions are true for most thermostats and furnace or modular blower, please consult the user manual of the thermostat and furnace or modular blower to verify.

* If the thermostat or furnace or modular blower does not conform to these common operating principles, please contact technical service to identify a compatible thermostat and/or furnace or modular blower.

* Do not install R-32 coil and/or outdoor unit if the thermostat or the furnace of modular blower is not compatible.

 

1. STANDARD 24VAC Thermostat:

* The "R" signal of the thermostat is the source of Y1/Y2, W1/W2, G and other signals. Please verify this by disconnecting the R signal in the thermostat. If the thermostat powers off, then the thermostat is compatible. If the thermostat is still powered on (by alternate power source or battery), lower and increase the thermostat setpoint to activate COOLING and HEATING call, respectively to the indoor unit. In either case, the indoor unit and outdoor unit shall not operate in COOLING or HEATING mode, respectively.

 

2. NON-Communicating Indoor Units:

* Non communicating indoor units must activate blower fan within 15 seconds, when a G call is presented to activate the blower fan. This can be verified by putting the system in FAN ONLY mode.

* The blower shall activate within 15 seconds after the thermostat provides 24VAC on the G terminal.

 

3. COMMUNICATING Indoor units:

* Communicating indoor units must prioritize 24VAC calls, over ClimateTalk ® communication and activate blower fan within 15 seconds, when a G call is presented over 24VAC signal. This is true for all ComfortNet systems. However, ComfortBridge systems, may require a firmware upgrade- THEREFORE, DO NOT INSTALL THE R-32 COIL AND OUTDOOR UNIT UNTIL THE LATEST FIRMWARE IS INSTALLED in ComfortBridge system, via CoolCloud app (version available for download on your mobile device).

 

See the installation manual for full details and requirements.

 

THIS WILL WORK WITH OLDER, NON-GOODMAN FURNACES, USING A STANDARD THERMOSTAT CONTROL.