Optimized for R404A refrigerant

or 'OP' code indicates a sensor failure or open circuit

Industrial Pressure Range: Accommodates high-pressure primary lines up to 200 psig with a broad 0-150 psig adjustable output

Broad Compatibility: Fits various Lochinvar and A

MARS 32621 Crankcase Heater R-134A Optimized for R404A refrigerantExperienced HVAC contractors understand that protecting the compressor from liquid slugging is non negotiable. The MARS 32621 Crankcase Heater is a heavy duty, 240V 50W belt style heater engineered to maintain optimal lubricant temperature during the off cycle. By keeping the crankcase oil warmer than the rest of the system, this belly band heater effectively prevents refrigerant migration, ensuring that the compressor startup is smooth and the