standard HVAC mounting hardware kits (such as the 14004237-002) are often ordered separately for full assembly

For technicians performing maintenance or retrofits

For temperature or pressure readouts

ensure the flange and power assembly match the balanced port requirements for proper stroke and alignment

Carrier KHAIR0201AAA Relay Kit 320735-701 standard HVAC mounting hardware kitsThe Carrier KHAIR0201AAA Isolation Relay Kit is a crucial OEM component designed for split system heat pumps, specifically 2 stage models including the CH17NA series. This 24V, 50 60Hz relay functions as a low ambient control bypass, effectively switching the controller out of the outdoor fan motor circuit during heating and defrost cycles to ensure stable head pressures and prevent motor stalling. Engineering grade electrical isolation protects