Technibel DKR5555C, Технические данные и руководство по обслуживанию

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8
-2. Refrigerant recovery
8
-2-1. Open the service valve to recover refrigerant into
refrigerant recovery unit.
8
-3. Service on outdoor unit
8
-3-1. After making sure that the refrigerant in the
circuit has been completely discharged, perform
the required servicing, such as replacing the
compressor or repairing refrigerant leaks.
8
-3-2. Before going on to the next step, leak test all
joints where welding has been done.
Nitrogen gas is best when pressurizing the system
for a leak test. However, if it is necessary to instead
test with refrigerant gas, be sure to recover all gas
into the refrigerant recovery unit after completing
the leak test.
8
-4. Evacuation using vacuum pump
8
-4-1. Using a hex wrench, set the valve stems of both
the narrow and wide tube service valves as
indicated in table below.
Refer to "
■
Service Valve Construction "shown later
8
-4-2. Connect the vacuum pump and a manifold valve
as shown in either Fig.9-2 or Fig.9-3, depending
upon the model. Confirm that all connections are
correctly made.
In order to withstand negative suction pressure
during evacuation, the manifold valve should be
equipped with a Hi / Lo compound gauge with a
minimum scale reading of – 76
cmHg.
NOTE
NOTE
NOTE
34
Refrigerant released into the air contributes to
destruction of our planet's ozone layer. You
should always use the refrigerant recovery unit
to help protect the environment.
CAUTION
Service Valve Valve Position
Unit A
Narrow
Position –c–
Wide
Unit B
Narrow
Position –a–
Wide
1 2 3 4 5 6 7 8 9 10 11 12
Terminal plate
GRN
BLU
Lo Hi
Vacuum pump
Manifold
valve
Power
Supply
Disconnect switch
(Field supply)
COND
SVA
SVB
CAPI
CAPI
CM2
CAPI
Unit A
Unit B
Unit C

GRV227M3C5

Fig.9-2