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1. Preliminary Site Survey
• A place protected from rain, direct sunlight and
well-ventilated wherever practicable.
• A place capable of bearing the weight of the outdoor
unit and isolating noise and vibration.
• A place where there are no obstruction of air flow
into or out the unit.
• Do not put any object which may become
obstacle for the air flow into or out the outdoor unit.
• The location must not be susceptible to high
concentration dust, oil, salt or sulfide gas.
1. Piping Length & Elevation
• If the piping is too long, both the capacity and reliability of unit will drop.
• As the number of bends increase, resistance to flow of refrigerant system increases, thus lowering cooling capacity and as a
result the compressor may become defective.
• Always choose the shortest path and follow the recommendation as tabulated below.
Indoor
Model
Outdoor
Max. length (m)
Max. elevation (m)
Max. no. of bends
Liquid pipe size
Gas pipe size
Remark: The refrigerant pre-charged in the outdoor unit is for piping length up to 7.62m/25ft.
2. Piping Connection
• Do not use contaminated or damaged copper tubing. If any piping, evaporator or condenser had been exposed or had been opened
for 15 seconds or more, then vacuum and purge with field supplied refrigerant. Generally, do not remove plastic, rubber plugs and
brass nuts from the valves, fittings, tubing and coils until it is ready to connect suction or liquid line into valves or fittings.
• If any brazing work is required, ensure that nitrogen gas is passed through coil and joints while the brazing work is being done.
This will eliminate soot formation on the inside wall of copper tubings.
• Cut the pipe stages by stages, advancing the blade of pipe cutter slowly. Extra force and a deep cut will cause more distortion of
pipe and therefore extra burr.
• Remove burrs from cut edges of pipes with a remover. This will avoid unevenness on the flare face which will cause gas leak.
• Align the center of the piping and sufficiently tighten the flare nut with fingers. Finally, tighten the flare nut with torque wrench
until the wrench clicks.
• Be sure to execute heat insulation. (Polyurethane form with thickness more than 15mm)
• Except the water source heat pump unit which is pre-charge with refrigerant, the fan coil unit and the refrigerant connection pipes
must be purged because the air that contain moisture remaining in the refrigerant cycle may cause malfunction to the compressor.
Inverter Cooling / Heat Pump Unit
IMPORTANT: * The figures shown in the table are for information purpose only. They should be checked and selected to
comply with the local/national codes of regulations. This is also subject to the type of installation and
conductors used.
Indoor Unit
Terminal Block
1
2
3
N
L
There must be a double pole switch with
!
minimum 3mm contact gap and fuse/circuit
breaker as recommended in the fixed
installation circuit.
INSTALLATION OF THE OUTDOOR UNIT
A
A
SL Series
Min. distance (mm) 300 1000 300 500
REFRIGERANT PIPING WORK
CKX20C
5CKX10C/CR
SLV20B
15
8
10
1/4"
5/8"
ELECTRICAL WIRING CONNECTION
Model
Outdoor Unit
Voltage range
Terminal Block
Power supply cable size*
Number of wire
1
Interconnection cable size*
2
Number of wire
3
Recommended time delay fuse
* If the length of the cable is more than 2m, use cable with bigger size.
Power Supply
Cable
• All wires must be firmly connected.
• All wires must not touch the refrigerant piping, compressor or any moving
parts of the fan motor.
• The connecting wires between the indoor unit and the outdoor unit must be
clamped on the wire clamps as shown in the figure.
• The power supply cord must be equivalent to H05RN-F (245IEC57) which is
the minimum requirement.
B
C
D
B
C
D
A
B
C
D
5CKX15C/CR
5SLX10C/CR
5SLX15C/CR
12
5
10
1/4"
1/4"
3/8"
1/2"
5
2. Outdoor Unit Installation
• Install the outdoor unit firmly
and horizontally. Maintain a
space clearance from the
obstruction as shown in the
figure for servicing and air
ventilation.
5CKX20C/CR
5SLX20C/CR
12
15
5
8
10
10
1/4"
1/2"
10/15
20/25
220-240V/1Ph/50Hz + !
2
mm
1.5
2.5
3
2
mm
1.5
2.5
4
A
15
3
4
20
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