14
Head Pressure Control
This system is used to increase the efficiency of the system by controlling the
condensing pressure when the outside temperature is low.
A. Fan ON/OFF Control System (Standard)
This system controls the condensing pressure by turning the condenser fan on/off using
a pressure switch.
One fan model turns off at 157psi condensing pressure and turns on at 228psi. In the
two fan model, one fan is turned off at 157 psi condensing pressure, turned on at 228
psi, and the other fan turned off at 138 psi and turned on at 203 psi.
B. Head Pressure Control Valve System (when supplied)
This valve used on high pressure refrigerant systems controls the head pressure at
approximately 180 PSIG.
C. Fan Speed Controller System (when supplied)
Fan speed controller XGE-type stabilizes condensing pressure by changing condenser’s
fan speed. The controller reduces fan noise and saves energy in low ambient conditions.
Fan speed controller keeps the condensing pressure at a steady level by regulating the
speed of the AC/EC fan motors. When pressure is declining the controller decreases the
output voltage changing the speed of AC/EC fan motor.
XGE saves energy and reduces noise by lowering the fan speed or cutting it off.
The easily accessible adjusting screw is situated on the top surface of XGE. The
direction to turn the screw for decrease or increase in the setting pressure is indicated
by arrow markings next to the adjusting screw (1turn = 21.7psi).
Locating and Mounting Condensing Unit
Locating Condensing Unit.
Condensing Unit must be located and
installed where there is an unrestricted
area. Avoid areas where there are
corrosive vapors or flammable materials.
Avoid locating units too close to walls.
Fan intake and discharge air space should
be at least 1m and 2m from wall. Other
sides should be at least 0.5m from wall.
No impediments should be located in
front of condensing units intake and
discharge.
If above is not followed correctly noise
