Thermo King 098203, Руководство по обслуживанию

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Refrigeration Maintenance
175
Removing the Gauge Manifold Set
NOTE: THE SYSTEM SHOULD BE RUNNING to ensure minimum refrigerant release to the
atmosphere,. However, this is not possible in all cases, but the same procedure should be followed.
1. Rotate discharge hose fitting hand wheel counterclockwise to withdraw the fitting stem from the
discharge line port valve. Then open both service manifold valves to center port.
2. Operate the unit on Cool using the “CAPACITY 100 percent” test from the Manual Function Test
menu of the controller.
3. Rotate the suction hose coupler hand wheel counterclockwise to withdraw the fitting stem from the
suction line port valve. Then turn the unit off.
4. Remove the gauge lines from the suction and discharge service fittings and cap the service ports.
5. Secure all manifold lines to manifold hose anchors when the manifold is not in use.
Checking Refrigerant Charge
The refrigerant charge should be checked during pretrip and routine maintenance inspections. A low
charge of refrigerant will cause the container temperature to rise due to the lack of liquid refrigerant at the
expansion valve even though the unit is operating in a cooling mode. All MAGNUM units are charged
with 4.0 kg (8.0 lbs) R-404A refrigerant at the factory. The refrigerant charge can be checked by
inspecting the receiver tank sight glass.
1. Inspect the receiver tank sight glass with the unit operating in cool or modulation cool. If the ball
floats in the bottom receiver tank sight glass when the compressor is engaged, the R-404A charge
level is correct.
1. Suction Connection
2. Discharge Connection
Figure 155: Purging Gauge Manifold
CAUTION: Rubber gloves are recommended when handling Ester based compressor oil.
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AFE85