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Step 6. Vacuum pump. Fig. 21
6.1 Use a spanner to remove the protective plugs from the service port, the low
pressure valve and the high pressure valve of the outdoor unit.
6.2 Connect the pressure hose from the pressure gauge to the service port of the
outdoor unit's low pressure valve.
6.3 Connect the charge hose from the manifold pressure gauge to the vacuum pump.
6.4 Open the low pressure valve of the manifold gauge and close the high pressure
valve.
6.5 Switch on the vacuum pump to empty the system.
6.6 The vacuum time must not be less than 15 minutes or ensure that the compound
pressure gauge reads - 0.1 MPa (-76 cmHg).
6.7 Close the low pressure valve of the manifold pressure gauge and turn off the
vacuum.
6.8 Hold the pressure for 5 minutes, make sure that the rebound of the composite
gauge indicator does not exceed 0.005 MPa.
6.9 Open the low pressure valve counterclockwise for ¼ turn with a hex spanner to let
some refrigerants fill the system and close the low pressure valve after 5 seconds and
quickly remove the pressure hose.
6.10 Check all internal and external seals for leaks with soapy water or a leak detector.
6.11 Fully open the low pressure valve and the high pressure valve of the outdoor unit
with a hexagonal spanner.
6.12 Reinstall the protective caps on the service port, the low pressure valve and the
high pressure valve of the outdoor unit.
6.13 Reinstall the valve cover.
Fig. 21 key:
1.
Composite indicator
2.
Low pressure valve
3.
Service port
4.
High pressure valve
5.
Valve protection caps
6.
Pressure hose
7.
Manifold pressure gauge
8.
Pressure gauge
9.
High pressure valve
10. Low pressure valve
11.
Charging hose
12.
Vacuum pump
INSPECTIONS BEFORE THE TEST OPERATION
100
EVVO CLIMA 9000/12000/18000/24000
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