58
12.4.4 Connect the Cable to the Outdoor Unit
1 Remove the control board cover from the unit by loosening the screw.
2
Connection cable
between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 x
1.5 mm
2
(3/4 ~ 1.75HP) or 4 x 2.5 mm
2
(2.0 ~ 2.5HP) flexible cord, type designation 60245 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.
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 instruction 12.2.4 of indoor unit.
WARNING
This equipment must be properly earthed.
Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason.
12.4.5 Piping
Insulation
1 Please carry out insulation at pipe 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.
12.4.6 Disposal of Outdoor Unit Drain Water
If a drain elbow is used, the unit should be placed on a stand which is taller than 3 cm.
If the unit is used in an area where temperature falls below 0°C for 2 or 3 days in succession, it is recommended
not to use a drain elbow, for the drain water freezes and the fan will not rotate.
12.4.7 In Case of Reusing Existing Refrigerant Piping
Observe the followings to decide reusing the existing refrigerant piping.
Poor refrigerant piping could result in product failure.
In the circumstances listed below, do not reuse any refrigerant piping. Instead, make sure to install a new piping.
-
Heat insulation is not provided for either liquid-side or gas-side piping or both.
-
The existing refrigerant pipe has been left in an open condition.
-
The diameter and thickness of the existing refrigerant piping does not meet the requirement.
-
The piping length and elevation does not meet the requirement.
Perform proper pump down before reuse piping.
In the circumstances listed below, clean it thoroughly before reuse.
-
Pump down operation cannot be performed for the existing air-conditioner.
-
The compressor has a failure history.
-
Oil color is darken. ( ASTM 4.0 and above ).
-
The existing air-conditioner is gas/oil heat pump type.
Do not reuse the flare to prevent gas leak. Make sure to install a new flare.
If there is a welded part on the existing refrigerant piping, conduct a gas leak check on the welded part.
Replace deteriorated heat insulating material with a new one.
Heat insulating material is required for both liquid-side and gas-side piping.
Terminals on the outdoor unit
S1
2
3
Colour of wires (connection cable)
Terminals on the indoor unit
L
1
N
S1
2
3
Install the hose at an angle so that the water
smoothly fl ows out.
Hose
Drain elbow
1
