CellarPro Fan Cycling Control Switch HE #37131
Overview
CellarPro's fan cycling control switch is required for R-290 HE split cooling units, R-290 HE air handler cooling units, and any unit that will be pulling fresh air that is colder than 20F.
Details
CellarPro Fan Cycling Control Switch HE (P/N 37131). CellarPro HE cooling units (with R-290 compressors) can be operated in temperatures down to 40F without additional equipment.
Between 40F and 20F, our compressor heater (item #1727) is required to warm the compressor shell. The compressor heater is included as standard equipment for our split and air handler cooling units.
Between 20F and -20F, our R-290 cooling units require this fan cycling control switch HE in addition to the compressor heater.
The fan cycling switch is required to assist the thermal expansion valve (TEV), which regulates flow of refrigerant based on system pressures. When those pressures fall outside of the design range, eg below 20F, the TEV does not regulate properly because the pressure of the liquid feeding the TEV gets too low for efficient regulation of the refrigerant flow, thereby resulting in reduced cooling capacity of the cooling unit.
The fan cycling switch compensates for the low pressures by turning off the condenser fan when system pressure falls below 75PSIG, thereby causing the system pressure to rise until it hits 120 PSIG, which is when the fans will turn on again.
Please note: At temperatures below 20F, in addition to requiring the fan cycling switch, CellarPro split systems must always be configured with electronic control, not valve control.
Features
- Provides fan control for temperatures below 20F
- Allows CellarPro R-290 HE cooling units to operate down to -20F (when combined with our compressor heater and electronic configuration (for split systems)
- Must be factory installed
Specs & Resources
Brand: CellarPro
Weight: 1 lbs
Warranty: 1 Year