The RFS-4001-030 utilizes a high-quality diaphragm and a snap-acting SPDT switch to ensure reliable contact change on increasing pressure

a multi-stage specific control is required

providing 25 lbs of force to ensure accurate air volume regulation

applying a high-quality thermal compound to the probe tip before inserting it into the thermowell is highly recommended

this is the official updated version

Copeland 918-0518-01 Heater 30067439-890 The RFS-4001-030 utilizes a high-qualityThe Copeland 918 0518 01 Crankcase Heater is a critical component for maintaining oil temperature and preventing refrigerant migration during compressor off cycles. This insertion type heater is engineered for a precise fit in 4, 6, and 8 cylinder deep sump compressors, including Copelametic and Discus models. Operating at 240 Volts and delivering 200 Watts of heating power, it ensures that technical lubricants remain at the optimal viscosity required