Technical data

2.8 Power and Controls
All controls and motor starting equipment
necessary for full unit operation are factory wired
and tested. The power and control components are
separated within the panel, which is designed to
IP-53 weather protection.
Power Compartment
The power compartment contains compressor
contactors, fuses and supply protection.
Control Compartment
The control compartment contains an electronic
circuit board and a soft touch key control panel with
display of operating functions, alarms and stops.
2.9 Theory of Operation
YCWM Cooling Mode
Low pressure liquid refrigerant enters the cooler
(Evaporator) and is evaporated and superheated
by the heat energy absorbed from the chilled water
passing through the cooler shell. Low pressure
vapour enters the compressor where pressure and
superheat are increased. Heat is rejected by the
water cooled condenser. The fully condensed and
subcooled liquid refrigerant then enters the
expansion valve where pressure reduction and
further cooling takes place before returning to the
cooler.
YCRM Cooling Mode
The operation of the YCRM is identical to the
YCWM except for the water cooled condenser
which is replaced by a remote air cooled
condenser.
035B40022-000 2-3
YCWM Models 60 to 150
YCWM Models 170 to 280