3rd December 2019


What is the purpose of a low ambient control?

Low ambient control (Figure 1) is a style of head-pressure control valve for low ambient conditions that has a round pressurized dome at its top that is pressure charged. This valve is often referred to as a low ambient control (LAC) valve. It is used in a refrigeration system.

Thereof, what is cut in and cut off pressure?

System Pressure. The cut-on and cut-off pressures in a well pump system must maintain a set relationship. Cut-off pressure is the high pressure that turns off the pump. Cut-on pressure is the low pressure that starts the pump and is typically 20 PSI less than cut-off pressure.

What is the function of the low pressure switch?

A high pressure switch (HPS) and a low pressure switch (LPS) are protective devices for the compressor and refrigeration circuit. The high pressure switch monitors the system for an inoperative outdoor motor, and/or a dirty/restricted condenser (outdoor) coil. Some switches are reset only from inside the HVAC unit.
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