Technicians should refer to the wiring diagram on the housing to match the specific primary voltage tap to the incoming line power

as an OEM replacement

It features a 15-second pre-purge (PP) cycle to clear residual gases and a 7-second trial for ignition (TFI) period

reducing energy consumption and preventing coil freeze-ups

typically found in commercial HVAC and lighting circuits

Copeland 918-0056-21 Heater L99H008 Technicians should refer to theFor industrial refrigeration and commercial HVAC systems, the Copeland 918 0056 21 480V crankcase heater is a mission critical component designed for robust compressor protection. Operating at 480 Volts, this crankcase heater ensures that the oil reservoir remains above the refrigerant saturation point during off cycles. This thermal regulation is essential to prevent refrigerant migration, which can lead to hazardous oil dilution and liquid slugging