A-303
INST
ALLA
TION PROCEDURE
CEILING
CASSETTE PM
A
C
B
D
S1 S2 S3
S1
S2
S3
D
F
C
B
A
A
A
CEILING CASSETTE PM SERIES PMH-P1/P1.6/P2BA
A.6.12 INSTALLATION PROCEDURE
PMH-P1/P1.6/P2BA
2.
Refrigerant pipes
s
Check that the difference between the heights of the indoor
and outdoor units, the length of refrigerant pipe, and the number
of bends in the pipe are within the limits shown below.
Models
(A) Pipe length
(B) Height
(C) Number of
(one way)
difference
bends (one way)
P1
max. 30 m
max. 30 m
max. of 9
P1.6, P2
max. 40 m
max. 40 m
max. of 12
•
Height difference limitations are binding regardless of which unit,
indoor or outdoor, is positioned higher.
A
Indoor unit
B
Outdoor unit
3.
Electrical work precaution
•
The compressor will not operate unless the power supply phase
connection is correct.
•
Grounding protection with a no-fuse breaker (earth leakage breaker
[ELB]) is usually installed for
D
.
•
The connection wiring between the outdoor and indoor units can
be extended up to a maximum of 50 meters, and the total exten-
sion including the crossover wiring between rooms is a maximum
of 80 m.
Use flat cable (three core wires) for indoor and outdoor connection
wiring, and connect the core wires in their line-up order to S1, S2
and S3 of the outdoor unit’s terminal board.
A means for the disconnection of the supply with an isolation switch, or
similar device, in all active conductors shall be incorporated in the fixed
wiring.
A
Indoor unit
B
Outdoor unit
C
Remote controller
D
Main switch/fuse
F
Grounding
Caution:
Do not push the contactor button (52C) on the outdoor unit, other-
wise the compressor may be damaged.
1.
Installing position
•
The dimensions of ceiling opening can be regulated within the range
shown in following diagram; so center the main unit against the open-
ing of ceiling, ensuring that the respective opposite sides on all sides
of the clearance between them becomes identical.
A
Air intake
B
Air outlet
C
Ceiling panel
D
Min. 200 mm
E
Suspension bolts W3/8 or M10
F
Grille
C
A
D
A
B
11
0
230
E
F
230
(mm)
(C)
(B)
(A)
A
B
For Power supply
For
Power
supply
