Komatsu Galeo PC138US-8, Shop Manual

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10 Structure, function and maintenance standard SEN02552-01
PC138US, USLC-8
3
A: Front warm/cool air outlet
B: Rear warm/cool air outlet
C: Foot warm/cool air outlet
D: Defroster warm/cool air outlet
E: Internal air flow outlet
F:
External air flow outlet
1. Sunlight sensor
2. Machine monitor
3. Refrigerant piping
4. Compressor
5. Condenser (with built-in receiver)
6. Air conditioner controller
7. Sight glass
8. External air filter
9. Air conditioner unit
10. Internal air filter
11. Dual pressure switch
12. Hot water take-out piping
13. Ambient temperature sensor
14. Hot water return piping
Specifications
Dual pressure switch
q
If abnormally low or high pressure was gener-
ated in the refrigerant circulation circuit, this
switch releases the magnet clutch of the com-
pressor to protect a series of cooler-related
equipment.
High-pressure OFF:
3.14 ± 0.20 MPa {32 ± 2 kg/cm²}
Low-pressure OFF:
0.20 ± 0.02 MPa {2 ± 0.2 kg/cm²}
Refrigerant to be used R134a
Refrigerant capacity (g) 800