Electrical - Marstair CXE Series Technical Manual

•
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.
•
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
On 3 PH CKC 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.
CKC ELECTRICAL
16 55908039-06