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Micro Panel Contents
FORM
8.4 ELECTRONIC EXPANSION VALVE
ELECTRONIC EXPANSION VALVE
The Electronic Expansion Valve (EEV) is an electroni- cally controlled expansion valve. The control algo- rithms to control the EEV reside in the micorprocessor software. The superheat setpoint can be programmed on the control panel.
The purpose of the EEV is to meter a flow of liquid refrigerant into the evaporator to maintain a superheat
setpoint. The refrigerant flow direction is designated by an arrow on the expansion valve body.
There are two safeties associated with the EEV; Low Superheat Cutout and Sensor Failure Cutout.
120 VAC PILOT
SOLENOID
IN
OUT
EXPANSION
VALVE
24 VAC HEAT
MOTOR
FIG. 50 – ELECTRONIC EXPANSION VALVE | LD09132 |
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172 | YORK INTERNATIONAL |