Electrical Wiring Connection; Special Precautions When Dealing With R410A Unit - McQuay (5) CCX Series Montageanleitung

Flare Joint
Indoor Piping
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
Terminal Block
1
2
3
N
L
!
There must be a double pole switch with a
minimum 3mm contact gap and fuse/circuit
breaker as recommended in the fixed
installation circuit.

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.
3. Piping Connection To The Units
Flared Tube
• Align the center of the piping and sufficiently tighten the flare nut with
• Finally, tighten the flare nut with torque wrench until the wrench clicks.
• When tightening the flare nut with the torque wrench, ensure that the
Flare Nut
• The refrigerant pipe connection are insulated by polyurethane
Torque Wrench

ELECTRICAL WIRING CONNECTION

Model
Outdoor Unit
Terminal Block
Voltage range
Power supply cable size*
1
Number of wire
2
Interconnection cable size*
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.
fingers.
direction for tightening follows the arrow on the wrench.
(ARMAFLEX type or similar).
Ø Tube, D
Inch mm
1/4" 6.35
3/8" 9.52
1/2" 12.70
5/8" 15.88
3/4" 19.05
Pipe Size mm / (in)
6.35 (1/4)
9.53 (3/8)
12.7 (1/2)
15.88 (5/8)
19.05 (3/4)
mm
mm
5
A (mm)
Imperial
1.3
1.6
1.9
2.2
2.5
Torque Nm
18
42
55
65
78
10/15
220-240V / 1Ph / 50Hz +
2
1.5
3
2
1.5
4
A 15
Rigid
0.7
1.0
1.3
1.7
2.0
20/25
2.5
3
2.5
4
20