Electrical Wiring Connection; Special Precautions When Dealing With R410A Unit - McQuay G Serie Installationsanleitung

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.
• 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.

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 refriger-
ant is 1.6 times higher than conventional refrigerant (R22),
thus proper installation / servicing is essential.
• Never use refrigerant other than R410A in an air condi-
tioner 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 com-
pressor. During installation or servicing, extra precau-
tion 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.

ELECTRICAL WIRING CONNECTION

Outdoor Unit
Voltage range
Terminal Block
Power supply cable size*
1
Number of wire
2
Interconnection cable size*
3
Number of wire
Recommended time delay fuse
Power Supply
* If the length of the cable is more than 2m, use cable with bigger
Cable
size.
Model
Wire Clamp
Interconnection
Cable
• 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 cyl-
inder.
• As an R410A air conditioner incurs higher pressure than
R22 units, it is essential to choose the copper pipes cor-
rectly. 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, highly hazardous gas may
be produced.
• When installing or removing an air conditioner, do not
allow air or moisture to remain in the refrigerant cycle.
1-6
10/15 20/25
220V-240V/ 1Ph/ 50Hz +
2
mm 1.5
3
2
mm 1.5
4
A 15
Power Supply
2.5
3
2.5
4
20
Cable