Does this unit require a crankcase heater

it continuously communicates with system components to optimize performance

using the correct metering piston is essential to prevent floodback and ensure the longevity of the compressor

What does it mean if the status light isn't flashing

Will this shield prevent internal condensation

McDonnell & Miller FS4-3S Switch 320720-756 Does this unit require aThe McDonnell & Miller FS4 3S (Part Number 114641) is a rugged general purpose liquid flow switch specifically engineered for high demand hydronic and industrial applications. This 1" NPT flow switch features a high grade stainless steel body and hardened stainless steel bearings to minimize friction and prevent mechanical failure in the field. Designed as the direct replacement for FS4 3S E, it integrates a Single Pole Double Throw (SPDT) snap switch