8.4 Electronic Expansion Valve; Fig. 50 - Electronic Expansion Valve - York YCAS0130 Installation, Operation & Maintenance Manual

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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 fl ow of liquid
refrigerant into the evaporator to maintain a superheat
120 VAC PILOT
SOLENOID
IN
EXPANSION
VALVE
FIG. 50 – ELECTRONIC EXPANSION VALVE
172

8.4 ELECTRONIC EXPANSION VALVE

setpoint. The refrigerant fl ow 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.
24 VAC HEAT
MOTOR
FORM 201.19-NM1 (204)
OUT
LD09132
YORK INTERNATIONAL