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SMMS 1-Way Cassette YH Type
Installation Manual
SMMS 1-Way Cassette YH Type
Installation Manual
 Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Pass the wires through the bushing of wire connection holes of the indoor unit.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing or other purpose.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
How to remove cover of the electrical control box
• Take off the screw A fixing the electrical control box, and then loosen the screw B a little. Remove cover of the
electrical control box by pushing the cover toward arrow direction C.
• Fasten the screws of the terminal block tightly and fix the wires with cord clamp attached to the electrical control
box. (Do not apply tension to connecting part of the terminal block.)
• Be sure to make a loop on the connecting part of the wire to the electric parts storing section of the indoor unit;
otherwise the electric storing section cannot be pulled out downward at service time.
• Mount cover of the electrical control box so as not to pinch the wires.
R
(L)
S
(N)
U1 U2 A B X Y
Wire
Electrical control box
Cord clamp
R
(L)
S
(N)
10
10
30
70
Earth line
Power supply
wire
Treating of wiring connecting port
• As shown on the figure, seal the wire connecting port with
heat insulator.
If sealing is insufficient, dewing is caused in the electrical
control box.
Power
supply wire
Remote controller
wire
Control wire
between indoor
and outdoor units
Heat insulator
(Required at site)
Wire
Cord clamp
Terminal
block
Wire
C
Screw B
Screw A
DON’T APPLY 220 - 240 V
FOR INTER-UNIT FOR REMOTE CONTROL FOR AI-NET
 Remote controller wiring
Strip off approx. 9 mm the wire to be connected.
▼ Wiring diagram
 Address setup
Set up the addresses as per the Installation Manual supplied with the outdoor unit.
A
B
A
B
Terminal block
Remote
controller
unit
Terminal block for
remote controller wiring
of indoor unit
Remote controller wire
(Locally procured)
29-EN 30-EN