Doosan DX225LC, Manual

Page: 108 / 136

Electrical System
Page 107
SP000935
Compressor
Compressor sucks in refrigerant which evaporates completely in
the evaporator and discharges it to the condenser.
Refrigerant undergoes repeated changes of states, in the order
of liquid, gas, and liquid in the freezing cycle, and the
compressor makes evaporated refrigerant a high temperature
and high-pressured gas to freeze it in the condenser.
Receiver Dryer
The receiver dryer reserves refrigerant enough to ensure
smooth freezing cycle responding immediately to the change of
level in the freezing cycle.
As liquid refrigerant from the condenser may contain refrigerant
gas with bubbles whose presence in the expansion valve
decreases the freezing power excessively, it separates liquid
and gas and sends liquid only to the expansion valve.
Water in refrigerant shall be eliminated with dryer and through
filter.
FG001365
Relief Valve
Figure 91
Categories Specifications
Output 155.3 cc/rev
Oil Level 120 cc (ND-OIL8)
Refrigerant R134a
Rated Voltage 24V
Relief Valve
Open: 35 - 42.2 kg•cm
2
G
Close: 28.1 kg•cm
2
G
FG001366
High/Low Pressure Switch
Figure 92
FG001462
MAX. 0.25 kg/cm 2
32 2 kg/cm 2
6 2 kg/cm 2
2.0 0.2 kg/cm
2
Figure 93