Outdoor Unit Installation - Mitsubishi Electric MFZ-KJ12NA Installation Manual

3. OUTDOOR UNIT INSTALLATION

3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Remove the service panel.
2) Remove the conduit cover.
3) Attach the conduit connectors to the conduit plate with lock nuts then secure
it against unit with screws.
4) Connect the ground wires of indoor/outdoor unit connecting wire (A) and power
supply cord (L) to the TB support.
5) Loosen the terminal screws, then attach indoor/outdoor unit connecting wire
(A) and power supply cord (L) from the indoor unit correctly to the terminal
block. Attach the wires to the terminal block securely so that the cores 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) Install the conduit cover.
8) Install the service panel securely.
<KJ09/12>
Service panel
Lock nut
Conduit cover
<KJ15/18>
Service panel
Lock nut
Conduit cover
Conduit
plate
3-2. PIPE FORMING AND INSTALLATION
Note: Refer to 4. FLARE CONNECTION, PIPE CONNECTION.
3-3. INSULATION AND TAPING
1) Cover piping joints with pipe cover.
2) For outdoor unit side, insulate the piping, including valves.
3) Apply piping tape (G) starting from the connection on the outdoor unit.
• When piping has to be installed through a ceiling, closet or where the tem-
perature and humidity are high, use additional field-supplied insulation to
prevent condensation.
Lead
wire
• Make earth wire a little longer than others. (More than 4 in. [100 mm])
• For future servicing, leave some slack in the connecting wires.
• Be sure to attach each screw to its correspondent terminal when securing
the cord and/or the wire to the terminal block.
Conduit plate
Conduit pipe
TB support
Conduit pipe
TB support
19/32 in.
(15 mm)
Power supply cord (L)
Terminal block
Grounding
terminal
Indoor/outdoor unit
connecting wire (A)
to conduit cover
Power supply cord (L)
Terminal block
Grounding
terminal
Indoor/outdoor unit
connecting wire (A)
to conduit cover
Power supply cord (L)
L1 L2
En-8