– 15 –
Wiring between indoor and outdoor units
NOTE
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the
header unit.
▼
Wiring example
U1 U2
U1 U2 S
S
U3
U6
L1 L2 L3 N
U4 U5
U1 U2 S
S
U3
U6
U4 U5
L N
A B
A B
L1 L2 L3 N
U1 U2
L N
A B
A B
U1 U2
L N
A B
A B
U1 U2
L N
A B
Outdoor Power supply
380 V - 415 V ~, 50 Hz
380 V ~, 60 Hz
Circuit breaker,
Power switch
Remote controller
Indoor unit
Outdoor Power supply
380 V - 415 V ~, 50 Hz
380 V ~, 60 Hz
Remote controller
Remote controller
Indoor unit
Indoor unit
Indoor unit
Circuit breaker
Circuit breaker
Header outdoor
unit
Follower outdoor
unit
Control wiring between outdoor units
Communication wiring between indoor and outdoor units
Communication wiring between indoor units
Indoor power supply
220 V - 240 V ~, 50 Hz
220 V ~, 60 Hz
Earth
Earth
Earth
Earth
Group control
Pull box
Pull box
Pull box
Earth
terminal
Earth
terminal
Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Route the wire through the wire connection port of the indoor unit.
• The low-voltage circuit is provided for the control wire and remote controller wire. (Do not connect the high-voltage
circuit.)
1. Loosen the two screws, and remove the cover of electrical control box by sliding in the direction of the arrow.
2. Connect the power supply wire, communication wires and remote controller wire to the terminal block of the
electrical control box.
3. Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
4. Mount the cover of the electrical control box without pinching wires.
(Mount the cover after wiring on the ceiling panel.)
U
1
U
2
A
R(L)
S(N)
B
U
1
U
2
A
B
R(L)
S(N)
Communication
wires (U1, U2
terminals)
Earth screw
Cord clamp
*1
Power supply wires (L, N terminals)
Remote controller wires (A, B terminals)
Cord clamp
*1
Select side C or D for the cord clamp position referring to the
following table according to the cable type and diameter.
* Cord clamp can be attached on either right or left side.
When twin system are connected, clamp two cables with one cord
clamp.
Wire type
Specification
Cord clamping
position
Cabtyre cable
3-core stranded wire 2.5 mm²
Side D
Cabtyre cable
4-core stranded wire 1.5 mm²
Side C
Side D
(Space: 8.5 mm)
Side C
(Space: 4 mm)
Hook part
Screws
Cover of electrical control box
29-EN
30-EN
Summary of Contents for MMU-AP0057MH-E
Page 29: ...EB99813301 ...
