Description
The Carrier HT32TC903 Crankcase Heater prevents migration and oil dilution in compressor off-cycles in HVAC systems, maintaining proper lubrication viscosity and protecting compression components from liquid slugging damage during startup. This electrical resistance heating element wraps around or mounts beneath the compressor shell, delivering continuous low-wattage heat that keeps oil temperatures above refrigerant condensation points when the unit is idle. Thermal energy prevents liquid refrigerant from dissolving into lubricating oil, which would reduce viscosity and compromise bearing protection during initial compressor rotation. This protection is vital in air conditioning and heat pump applications where ambient temperature varies.
