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Step 3: Air Evacuation of the equipment:
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
There is no extra refrigerant in the outdoor unit for air purging.
1. Connect a charging hose with a push pin to
the Low side of a charging set and the service
port of the gas side 3-way valve.
o
Be sure to connect the end of the
charging hose with the push pin to the
service port.
2. Connect the center hose of the charging set to
a vacuum pump.
3. Turn on the power switch of the vacuum pump
and make sure that the needle in the gauge
moves from 0 cmHg (0 MPa) to -76 cmHg
(-0.1 MPa). Then evacuate the air
approximately ten minutes.
4. Close the Low side valve of the charging set
and turn off the vacuum pump. Make sure that
the needle in the gauge does not move after
approximately five minutes.
Note : BE SURE TO TAKE THIS
PROCEDURE IN ORDER TO AVOID
REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the
vacuum pump and from the service port of the
3-way valve.
6. Tighten the service port caps of gas side
3-way valve at a torque of 18 N•m with a
torque wrench.
7. Remove the valve caps of both of the gas side
and liquid side 3-way valve. Position both of
the valves to “OPEN” using a hexagonal
wrench (4 mm).
8. Mount valve caps onto the gas side and liquid
side of the 3-way valve.
o
Be sure to check for gas leakages.
CLOSE
Vacuum pump adaptor
Outdoor unit
Liquid side
Gas
side
OPEN
Vacuum
pump
Liquid side 3-way valve
Gas side 3-way valve
Liquid side
Gas
side
Tube connector
Tube connector
Tube connector
Tube connector
Close
Close
Indoor Unit
Indoor Unit
CAUTION
If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step
above take the following measure:
-
If the leak stops when the piping connections are tightened further, continue working from step
.
-
If the leak does not stop when the connections are retightened, repair location of leak.
-
Do not release refrigerant during piping work for installation and reinstallation.
-
Take care of the liquid refrigerant, it may cause frostbite.
11.5 Connect The Cable To The Outdoor Unit
1. Remove the particular plate from the unit by
loosening two screws.
2. Cable connection to the power supply through
isolating Devices (Disconnecting means).
o
Connect approved type polychloroprene
sheathed
power supply cord
CU-4Z80*** (3 x 2.5 mm
2
), CU-5Z90***
(3 x 4.0 mm
2
) 60245 IEC 57 type
designation or heavier cord to the
terminal board, and connect the others
end of the cord to Isolating Devices
(Disconnecting means).
3.
Connection cable
between indoor unit and
outdoor unit shall be approved
polychloroprene sheathed 4 x 1.5 mm
2
flexible
cord, type designation 60245 IEC 57 or
heavier cord. Allowable connection cable
length of each indoor unit shall be 30 m or
less.
4. Connect the power supply cord and
connection cable between indoor unit and
outdoor unit according to the diagram as
shown.
Screws
Particular plate
AMP Air Conditioning
www.ampair.co.uk | [email protected]
