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Flare Joint
Flared Tube
Indoor Piping
Flare Nut
Torque Wrench
Spanar
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
Outdoor Unit
Terminal Block
Terminal Block
1
2
3
Power Supply Cable
L
N
!
SPECIAL PRECAUTIONS WHEN DEALING WITH R410A UNIT
R410A is a new HFC refrigerant which does not damage the ozone layer. The working pressure of this new refrigerant is 1.6 times
higher than conventional refrigerant (R22), thus proper installation/servicing is essential.
•
Never use refrigerant other than R410A in an air conditioner which designed to operate with R410A.
•
POE oil is used as lubricant for R410A compressor, which is different from the mineral oil used for R22 compressor. During
installation or servicing, extra precaution must be taken not to expose the R410A system too long to moist air. Residual POE oil
in the piping and components can absorb moisture from the air.
•
To prevent mischarging, the diameter of the service port on the flare valve is different from that of R22.
•
Use tools and materials exclusively for refrigerant R410A. Tools exclusively for R410A are manifold valve, charging hose,
pressure gauge, gas leak detector, flare tools, torque wrench, vacuum pump and refrigerant cylinder.
•
As an R410A air conditioner incurs higher pressure than R22 units, it is essential to choose the copper pipes correctly. Never use
copper pipes thinner than 0.8mm even though they are available in the market.
•
If the refrigerant gas leakage occurs during installation/servicing, be sure to ventilate fully. If the refrigerant gas comes into
contact with fire, a poisonous gas may occur.
•
When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigerant cycle.
Allen Key
Flare Nut
Service Port
Liquid Side
Indoor Unit
Gas Side
Open
Vacuum
Pump
Hi
Low
Close
3. Piping Connection To The Units
• 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.
ELECTRICAL WIRING CONNECTION
1
2
3
There must be a double pole
switch with a minimum 3 mm
contact gap and fuse/circuit
breaker as recommended in
the fixed installation circuit.
VACUUMING AND CHARGING
Refrigerant Piping
Outdoor Unit
3 Ways Valve
Outdoor Unit
Discharge Valve
Close
Suction Valve
Close
Pipe Size, mm (in)
6.35 (1/4)
9.53 (3/8)
12.7 (1/2)
15.88 (5/8)
19.05 (3/4)
Model
Voltage range
Power supply cable size*
Number of wire
Interconnection cable size*
Number of wire
Recommended time delay fuse
* If the length of the cable is more than 2m, use cable with bigger size.
• 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.
1. Purging The Piping And The Indoor Unit
Except for the outdoor unit which is pre-charged with refrigerant
R22, the indoor unit and the refrigerant connection pipes must be
air-purged because the air containing moisture that remains in the
refrigerant cycle may cause malfunction of the compressor.
• Remove the caps from the valve and the service port.
• Connect the center of the charging gauge to the vacuum pump.
• Connect the charging gauge to the service port of the 3-way valve.
• Start the vacuum pump. Evacuate for approximately 30 minutes.
The evacuation time varies with different vacuum pump capacity.
Confirm that the charging gauge needle has moved towards -
760mmHg (0~760mmHg).
Caution:
• If the gauge needle does not move to 0~760mmHg, be sure to
check for gas leaks (using the refrigerant detector) at flare type
connection of the indoor and outdoor unit and repair the leak
before proceeding to the next step.
• Close the valve of the charging gauge and stop the vacuum pump.
• On the outdoor unit, open the suction valve (3 way) and liquid
valve (2 way) (in anti-clockwise direction) with 4mm key for
hexagon sacked screw.
6
Torque (Nm)
18
42
55
65
78
10/15
20/25
220V-240V/ 1Ph/ 50Hz +
2
mm
1.5
3
2
mm
1.5
4
15
A
2.5
3
2.5
4
20
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