McQuay A Series - Electrical Work, Charging, and Special Precautions; Additional Refrigerant Charge Data; Electrical Wiring Connections and Diagrams

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ELECTRICAL WIRING CONNECTION
CK20A / CK25A & CK30A
Model Indoor CK20A CK25A CK30A
Outdoor SL20B/20C SL25B/25C SL28C/30C
Voltage range** 220-240V/1Ph/50Hz +
!
or 208-230V/1Ph/60Hz+
!
Recommended fuse* (A) 16 20 25
Power supply cable size* (mm
2
) 2.5 2.5 4.0
Number of conductors 333
Interconnection cable size* (mm
2
) 2.5 2.5 2.5
Number of conductors 334
COMP
L
N
N
COMP
N
Interconnection Cable
Indoor Unit
Terminal
Block
Outdoor Unit
Terminal
Block
There must be a double pole switch with
minimum 3mm contact gap and fuse/circuit
breaker as recommended in the fixed
installation circuit.
CK20A / 25A <> SL20B / 25B / 20C / 25C
CK30A <> SL28C
Power
Supply
Cable
!
COMP
COMP
L
N
N
L
N
L
N
CK30A <> SL30C
Interconnection Cable
Indoor Unit
Terminal
Block
Outdoor Unit
Terminal
Block
There must be a double pole switch with minimum
3mm contact gap and fuse/circuit breaker as
recommended in the fixed installation circuit.
Power Supply Cable
!
Cooling Only
IMPORTANT: *These values are for information only. They should be checked and selected to comply with local and/or
national codes and regulations. They are also subject to the type of installation and size of conductors.
** The appropriate voltage range should be checked with label data on the unit. ETL listed is only applica-
ble to 60Hz power supply only.
Additional Charge (In gram)
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 (R22)
10m 15m 20m 25m 30m 35m
CK20A 40 110 - - - -
CK25A 90 270 - - - -
CK30A/40A/50A 120 380 640 900 1150 1410
Cooling Only (R407C)
10m 15m 20m 25m 30m 35m
CK20A 40 110 - - - -
CK25A 80 260 - - - -
CK30A/40A/50A 120 360 600 840 1090 1330
Cooling & Heatpump (R410A)
10m 15m 20m 25m 30m 35m
5CK20/25A/AR 30 100 - - - -
5CK30/40/50A/AR 80 230 390 550 710 870
Heatpump (R22)
10m 15m 20m 25m 30m 35m
CK20AR 40 110 - - - -
CK25AR 90 270 - - - -
CK30AR/40AR/50AR 90 280 460 650 830 1020
Heatpump (R407C)
10m 15m 20m 25m 30m 35m
CK20AR 40 110 - - - -
CK25AR 80 260 - - - -
CK30AR/40AR/50AR 80 260 430 610 780 960