Condensing Units
CU/CFCU
Condensing Units
5
Installation & Maintenance Manual : 6259626 IM V1.6.0 04/16
Description
HEAT PUMP UNITS
Heat pump units are equipped with a reversing valve, crankcase heater and suitably
sized accumulator. A factory set defrost sensor is also fitted to defrost the outdoor coil
when the unit is operating in heat pump mode.
CUHS 1 - 4
Equipped with a bi-directional expansion valve.
CUHS 5 - 12
Fitted with an expansion valve, check valve and sight glass.
CONTROLS
The control panel is equipped with t
he necessary PCB’s, MCB’s, contactors and other
items to provide fully automatic safe operation.
HEAD PRESSURE CONTROL
CU./CUH.1 - 12
Head pressure is maintained by a factory fitted, pressure actuated, head pressure
controller which varies the speed of the fan(s) to provide optimum control under varying
ambient conditions.
CFCUS 5 - 10
Head pressure is maintained by a factory fitted set of pressure actuated opposed blade
dampers which modulate to provide optimum control under varying ambient conditions.
OPTIONAL EXTRAS
Epoxy Coated Coils
In atmospheres where high corrosion is anticipated epoxy coated aluminium finned coils
can be supplied.
Wall Brackets
(CU./CUH. 1
– 4)
Of a single multi-fit design in matching material and colour. Ready to assemble on site.
Defrost Drain Tray
(CUH/CUHS 1
– 4)
A trace heated stainless steel defrost drain tray can be fitted to units.
Hot Gas Bypass
For low load applications a hot gas bypass valve and in-line solenoid valve can be factory
fitted to CUS 5 - 12 and CFCUS 7.5 - 10 (supplied loose on units CFCUS 5 - 6 and
CUS 1 - 4).
