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8
Electric wiring
WARNING
The equipment shall be installed in compliance with NEC and local codes.
CAUTION
Do not connect high voltage power wires to the control terminal blocks (Uv (U1, U2), Uh (U3, U4), Uc (U5, U6));
All fi eld wiring insulation rating must comply with NEC and local codes.
All wiring must be strained relieved as specifi ed by NEC and local codes.
Refrigerant piping and control wiring should use the same routing.
Do not energize the indoor units until leak check and vacuuming are completed.
For indoor unit power and control wiring see indoor unit installation instructions.
The appliance shall be installed in accordance with national wiring regulations.
NOTE
Use copper supply wires only.
Use wiring with insulation rated for the highest voltage involved for communication and power wiring.
Power supply specifications
Do not bridge the power between outdoor units
through the equipped terminal blocks (L
, L
, L
1
2
39-EN
).
3
Power supply for
outdoor units
Incorrect
Power wiring selection
1
Single unit
Unit 1
ELCB
Main
switch
Model name
Phase supply
(Standard)
MMY-MUP0721FT6P-UL
MMY-MUP0961FT6P-UL
MMY-MUP1201FT6P-UL
3 phase 60 Hz
MMY-MUP1441FT6P-UL
MMY-MUP1681FT6P-UL
MMY-MUP1921FT6P-UL
Model name
Phase supply
(High heat)
MMY-MUP072H1FT6PUL
3 phase 60 Hz
MMY-MUP096H1FT6PUL
MMY-MUP120H1FT6PUL
Model name
Phase supply
(Standard)
MMY-MUP0721FT9P-UL
MMY-MUP0961FT9P-UL
3 phase 60 Hz
MMY-MUP1201FT9P-UL
208-230 V
MMY-MUP1441FT9P-UL
MMY-MUP1681FT9P-UL
Model name
Phase supply
(High heat)
MMY-MUP072H1FT9PUL
3 phase 60 Hz
MMY-MUP096H1FT9PUL
208-230 V
MMY-MUP120H1FT9PUL
– 20 –
U
n
t i
2
Unit 3
ELCB
ELCB
Main
Main
switch
switch
MCA: Minimum Circuit Amps
MOCP: Maximum Overcurrent Protection (Amps)
MCA
17.4
17.5
21.3
460 V
24.6
27.4
31.8
MCA
18.5
25.0
460 V
25.4
MCA
36.4
36.6
36.8
51.5
57.4
MCA
36.6
52.3
53.1
MOCP
20
20
25
30
40
45
MOCP
25
30
30
MOCP
45
45
45
60
80
EN
MOCP
EN
45
60
70
ID
40-EN
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