Thermo King 098916, Руководство по обслуживанию

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Refrigeration Maintenance
130
Perform an Oil Acid Test
Perform an oil acid test (refer to Tool Catalog for
oil test kit) whenever a unit has a substantial
refrigerant loss, a noisy compressor or dark/dirty
oil.
Isolate the Compressor
The discharge suction and digital ball service
valves isolate the compressor from the high and
low sides of the refrigeration system.compressor
isolation is needed for system diagnosis, service
and repair.
NOTE: The valves are a permanently assembled
unit and must be replaced in total if defective.
The only maintenance possible on the discharge
or suction service valve is to periodically tighten
the packing nut or to replace the packing.
• Back Seated: Normal operation position.
• Open to Service Port: Position for servicing.
• Front Seated: To check or remove compressor.
Working with a Gauge Manifold
Using a New Gauge Manifold Set
A new gauge manifold set and gauge hoses (refer
to Tool Catalog) should be dedicated for use with
only R-404refrigerant.
Gauge Manifold Valve Positions
The gauges indicate low and high side pressures.
Operate one or both hand valves to perform the
different service operations.
WARNING: Do not start unit with
discharge valve in Front Seated position.
1. Full Counterclockwise
Figure 75: Service Valve Back Seated
1. 1/2 Turn in
Figure 76: Service Valve Open to Port
AXA0176
AXA0177
1. Full Clockwise
Figure 77: Service Valve Front Seated
1. Quick Disconnect Access Valve
2. Discharge Service Valve (DSV)
3. Suction Service Valve (SSV)
Figure 78: Balancing the Pressure
AXA0178
AXA0241