Mitsubishi Electric MFZ-KA09NA Installation Manual page 6

2-8. CONNECTING WIRES FOR INDOOR UNIT
Note: When the indoor unit is powered from the outdoor unit, depending on local code, a disconnect switch needs to be installed to a power supply circuit.
1) Remove the electrical cover.
2) Remove the conduit plate.
3) Attach the conduit pipe to the conduit plate with the lock nut. The indoor/outdoor unit connecting wire (A) appearing from the inside of conduit pipe should be less
than 7/8 in. (23 mm). (Fig. 1)
4) Process the end of ground wire (Fig. 2). Connect it to the ground terminal of the electrical parts box.
5) Process the end of indoor/outdoor unit connecting wire (A) (Fig. 2). Attach it to the terminal block. Be careful not to make mis-wiring. Attach the wire to the terminal
block securely so that its core cannot be seen, and no external force affects the connecting section of the terminal block.
6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.
7) Reinstall the conduit plate.
8) Reinstall the electrical cover.
Remark:
* A disconnect switch (15A
MAX) is required.
Check the local code.
** Use a ring tongue termi-
nal in order to connect a
ground wire to terminal.
Power supply
208/230 VAC,
1 phase 2 wires.
60 Hz
Ground
Conduit plate
Less than 7/8 in.
(23 mm)
Lock nut
Conduit pipe
Fig. 1
2-9. CONNECTING AN INTERFACE (MAC-397/399 IF-E, option) TO THE AIR CONDITIONER
• Connect an interface to the indoor control P.C. board of an air conditioner
with a connecting cable.
• Cutting or extending the connecting cable of the interface results in defects
in connecting. Do not bundle the connecting cable together with power
much distance as possible between the connecting cable and those wires.
• The thin part of the connecting cable should be stored and placed where
customers cannot touch it.
1) Remove the electrical cover.
2) Join the connecting cable to CN105 on the indoor control P.C. board.
4) Attach the cable clamp provided with Interface to the thick part of the connecting cable with a screw
5) Reinstall the electrical cover. Be careful not to catch the thin part of the connecting cable in the cover.
Fix the connecting cable at the prescribed position
WARNING
securely.
WARNING
and/or malfunction
En-5
INDOOR UNIT
Grounding
Terminal block
terminal**
Disconnect
switch*
208/230 VAC
1 phase, 60 Hz
OUTDOOR UNIT
Grouding terminal**
(15 mm)
1-3/8 in.
(35 mm)
Lead
Fig. 2
wire
Electrical cover
Screw
Screw
Terminal block
S1 S2 S3
Screw
Grounding
terminal
Indoor/outdoor unit
connecting wire (A)
• Connect wires to the appropriate terminals
• For future servicing, leave some slack in the connecting wires.
Thin part of the connecting cable.
Place this part where customers
Room air
cannot touch it.
conditioner
Indoor control
CN105
P.C. board
Electrical box
Lock nut
Conduit plate
Conduit pipe
Main body of an interface
Connector
Thick part of the connecting cable
2) CN105
4) Cable clamp
Cord clamp
3) Hook