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The installer supplies mains, control and interconnecting cables: equipment must be earthed.
Wiring must be carried out in accordance with local and national codes.
Interconnecting wiring diagrams are in the indoor unit installation instructions.
Mains supply cables must be size compatible with the recommended fuse (see indoor unit instructions).
An all pole isolator switch should be positioned within easy reach of the indoor unit.
Cable clamps for use with stranded cables are supplied in units 15 - 90 and should be used to secure
incoming/outgoing cables. Installers must supply a method of securing solid sheathed cables.
THREE PHASE UNITS WITH SCROLL COMPRESSORS:
On 3 Ph units sizes 50 - 200 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.
SYSTEMS INCLUDING AN ELECTROMECHANICAL UNIT:
These require a supply to the outdoor unit with connecting cables run to the indoor unit.
ISOLATOR SWITCHES:
On 3 phase systems 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. Failure to observe this could result in damage to the
electronic board. If in doubt, do not switch the neutral but connect it solidly.
CKC
15
20
FUSE
16
16
CKC
30
40
FUSE
10
10
ELECTRICAL
1PH FUSE SIZE
30
40
50
16
20
16
3PH FUSE SIZE
50
60
80
10
10
10
60
80
90
100
20
25
32
90
100
130
16
16
16
12
130
150
165
-
-
-
-
150
165
20
20
180
200
-
-
180
200
25
32
55008275-17
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