43
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 the 3-way valve at a torque of 18 Nym with a torque wrench.
7 Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN”
using a hexagonal wrench (4 mm).
8 Mount valve caps onto the 2-way valve and the 3-way valve.
o Be sure to check for gas leakage.
Caution
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step
ƻ
3 above take the following
measure:
- If the leak stops when the piping connections are tightened further, continue working from step
ƻ
3.
- 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.
10.3.4 Connect the Cable to the Outdoor Unit
1 Remove the control board cover from the unit by loosening the screw.
2 Connecting cable between indoor unit and outdoor unit shall be approved
polychloroprene sheathed 4 x 1.5 mm
2
(1.0 ~ 1.75HP) or 4 x 2.5 mm
2
(2.0 ~
2.5HP) flexible cord, type designation 245 IEC 57 or heavier cord. Do not
use joint connection cable. Replace the wire if the existing wire (from
concealed wiring, or otherwise) is too short.
Terminals on the outdoor unit 1 2 3
Colour of wires
Terminals on the indoor unit 1 2 3
3 Secure the cable onto the control board with the holder (clamper).
4 Attach the control board cover back to the original position with screw.
5 For wire stripping and connection requirement, refer to instructions 10.2.4 of
indoor unit.
This equipment must be properly earthed.
• Earth wire shall be Yellow/Green (Y/G) in colour and longer than the other AC wires for safety reason.
10.3.5 Piping insulation
1 Please carry insulation at piping connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram.
Please wrap the insulated piping end to prevent water from going inside the piping.
2 If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by
using POLY-E-FOAM with thickness 6 mm or above.
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