Bryant Legacy Thermostats Wiring

Bryant Legacy Thermostats Wiring

There are four legacy series of Bryant thermostats:
  1. Programmable for AC units
  2. Non-programmable for AC units
  3. Programmable for heat pump units
  4. Non-programmable for heat pump units
For example, T2-PAC01-A and T2-NAC01-AC are for AC systems to control one stage of cooling and one stage of heating and they will not operate a heat pump. T2-PHP01-A and T2-NHP01-A are designed for heat pump systems, to control two stages of cooling and three stages of heating (they can also be converted to AC operation).

An AC system requires up to 6 wires for 24 VAC operation (5 for battery operation alternative). The heat pump system requires up to 7 wires for 24 VAC operation (6 for battery operation)

See below wiring for some of the various systems with the Bryant legacy thermostats:
  1. Single speed AC to thermostat


common wire not necessary if using battery
Separate Rh and Rc connection (remove jumper) if using split transformer connection for indoor and outdoor unit

  1. Single speed Heat Pump to thermostat



  1. Single stage AC and Furnace system to thermostat


The above shows a system with split power (no Rc/Rh jumper in this case).


  1. 2-stage AC system with variable speed, step modulating, multi-stage and single stage furnace



  1. 2-Stage Heat pump with Variable speed, Multi-stage, Stage Modulating and Single-Stage Furnace



  1. FV/FK Fan coil with 2-Stage AC



  1. FV/FK Fan coil  with 2-Stage Heat Pump


It is always ideal to do all wiring when power is disconnected.  Refer to device's manual in case wiring is unclear.

Contact our HVAC Controls Engineering team for assistance with custom HVAC control solutions.

    • Related Articles

    • Mitsubishi Electric Trane PAC-US445CN-1 Thermostat Adapter

      Mitsubishi Electric introduced the PAC-US445CN-1 Thermostat Adapter which, like the preceding PAC-US444CN-1, allows a field-supplied 24V thermostat to control Mitsubishi mini-split indoor units through the CN105 connector and CNH02 connector for ...

    • When the thermostat doesn't reach the set temperature, what should I do?

      In case the temperature in your house or office is not what you selected as the desired temperature from your thermostat, your thermostat/ HVAC system may be malfunctioning. Your thermostat might occasionally have technical issues, just like any ...

    • Bryant Evolution Connex SYSTXBBECC01-B Control

      Bryant introduces a smart Wi-Fi enabled Evolution Connex system thermostat, SYSTXBBECC01-B. It is 7-day programmable with wake-away-home-sleep and vacation scheduling. With dual-fuel solution that allows furnace and heat pump combinations. In that ...

    • Smart Home Thermostats for Bryant Evolution Connex System

      The Bryant Evolution System is a cutting-edge HVAC system that brings unparalleled comfort and energy efficiency to homes. This advanced system is designed to work seamlessly with a range of smart home thermostats, allowing homeowners to enjoy the ...

    • Mitsubishi Electric PAC-IT51AD-E Vs PAC-IT52AD-E IT Signal Adapter

      Mitsubishi Electric PAC-IT51AD-E and PAC-IT52AD-E are terminal signal adapters for MHK1 thermostat interface. PAC-IT51AD-E allows CITY MULTI units with CN100 and CN51 terminals to supplement CN105 connection for use with the MHK1 thermostat. ...