Electrical Wiring Connection - McQuay CK20AR Installation Manual

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 15 mm)
• Except the outdoor unit which is pre-charge with refrigerant R22, the indoor 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 compres-
sor.
Additional Charge
The refrigerant is pre-charge in the outdoor unit, but additional charge of refrigerant after vacuuming is necessary. Follow
the recommendation as tabulated below.
Cooling Only
MODEL
L <= 5 m
L = 7 m
L = 10 m
L = 15 m
L = 20 m
Heat Pump
MODEL
L <= 5 m
L = 7 m
L = 10 m
L = 15 m
L = 20 m
Cooling Only
CK20A / CK25A & CK30A
MODEL
VOLTAGE RANGE
POWER SUPPLY CABLE SIZE (mm
NUMBER OF CONDUCTORS
INTERCONNECTION CABLE SIZE (mm
NUMBER OF CONDUCTORS
CK20A(1-16)ENG
INDOOR CK20A
OUTDOOR SL20B
0.250 kg
0.280 kg
0.325 kg
0.400 kg
-
INDOOR CK20AR
OUTDOOR SL20BRK
-
0.050 kg
0.075 kg
0.150 kg
-

ELECTRICAL WIRING CONNECTION

INDOOR
OUTDOOR
2
)
2
)
10
CK25A CK30A
SL25B SL30C
0.100 kg 0.400 kg
0.176 kg 0.600 kg
0.290 kg 0.650 kg
0.480 kg 0.900 kg
- 1.150 kg
CK25AR CK30AR
SL25BRK SL30CR
- -
0.100 kg 0.100 kg
0.500 kg 0.250 kg
0.750 kg 0.500 kg
- 0.750 kg
CK20A
SL20B
220 - 240V / 1ph / 50Hz +
2.5
3
2.5
3
1-10
2/1/01, 10:15 AM
CK40A CK50A
SL40C SL50C
- -
0.100 kg 0.100 kg
0.250 kg 0.250 kg
0.500 kg 0.500 kg
0.750 kg 0.750 kg
CK40AR CK50AR
SL40C SL50C
- -
0.100 kg 0.100 kg
0.250 kg 0.250 kg
0.500 kg 0.500 kg
0.750 kg 0.750 kg
CK25A
SL25B
2.5
3
2.5
3