12/23
55908014-06
EVACUATING
1. Release the nitrogen holding charge in the indoor and outdoor units to atmosphere. Open the valves
(hex drive fully out) using a 5mm Allen key. Connect a vacuum pump to the service ports on the
outdoor unit valves and evacuate the system to 1000 microns (1 Torr) or better and allow to be held
for a minimum of 15 minutes.
2. Replace the caps on the service ports, (torque to 25NM).
CKC ELECTRICAL
The installer supplies mains, control and interconnecting cables: equipment must be earthed.
Wiring must be carried out in accordance with local and national codes.
Mains supply cables must be size compatible with the recommended fuse (see indoor unit instruction
for system fuse size).
An all pole isolator switch should be positioned within easy reach of the indoor/outdoor unit dependant
on which receives the fuse supply.
Cable clamps for use with stranded cables are supplied and should be used to secure
incoming/outgoing cables. Installers must supply a method of securing solid sheathed cables.
3PH CKC 80
On 3 PH CKC 80 it is possible for the scroll compressor to run backwards.
This becomes obvious on start up - the compressor will not develop a normal running pressure differential
and the top will not become warm: it may be excessively noisy. If this happens, switch off the mains power
and exchange the two supply phases not
connected to the indoor unit. This will correct the rotation.
ISOLATOR SWITCHES
On a 3 phase system, ensure that the neutral contact of the isolator switch is an early make, late break type.
This applies to all switches in the supply line. If in doubt, do not switch the neutral but connect it solidly.
WIRING
Cable entry for the outdoor unit electrics is through the cabinet to a terminal block.
Ensure that all connections are secure and that both units are earthed.
CKC fan motors have a single speed and are ready for use at all outdoor temperatures.
NOTE: The CKC wiring diagram can be found on the inside of the front panel.
INTERCONNECTING WIRING
REFRIGERANT
CABLE FOR CONTROL CIRCUIT
0.75 mm² 2.5 mm²
-
POWER CABLE TO SUIT SUPPLY FUSE
CABLE TO SUIT INDOOR UNIT LOADING
(ALLOW FOR HEATER LOAD IF FITTED)
PE PE
PE
L3
PE
PE
PE
L
L
L1
L
L
L
N
N
N
N
N
N
CU
CU
CU
3
3
3
FUSED SUPPLY
230V 1PH 50 Hz)
FUSED SUPPLY
230V 1PH 50 Hz)
CX
FUSED SUPPLY
(400V 3PH 50Hz)
CKC 3 PH
CX CX
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