Operating instructions

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c. Place the flare nuts over the incoming pipework and flare the pipe ends. The use of a little
refrigeration oil on the flaring tool will help.
d. Connect the pipework between the units. Do not leave pipe ends, valves etc. open to the
atmosphere.
R407C is very hygroscopic, and will absorb damaging levels of moisture if left open.
Always use two spanners when tightening the flare nuts to avoid twisting the pipes. Use a small
amount of refrigerant oil on the mating surfaces.
e. Sight glasses and filter driers are not necessary, but if required should be fitted between the
outdoor unit liquid shut off valve and the expansion device.
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.
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
FUSES: Refer to indoor unit installation instructions.
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
PE
L
L
L
L
N
N
N
N
CU
CU
3
3
FUSED SUPPLY
230V 1PH 50 Hz)
FUSED SUPPLY
230V 1PH 50 Hz)
CXE CXE