Mitsubishi Electric TRANE NTXFKS12A112A Series Manual page 7

2-6. CONNECTING WIRES FOR INDOOR UNIT
Note: The unit should be installed by a licensed contractor/electrician. If required by applicable national, state and local codes; a disconnect switch will need to
be installed when the indoor unit is powered from the outdoor unit.
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:
* Use a ring tongue terminal
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
2-7. DRAIN PIPING
• If the extension drain hose has to pass through a room, be sure to wrap it with commercially sold insulation.
• The drain hose should point downward for easy drain flow. (Fig. 1)
• If the drain hose provided with the indoor unit is too short, connect it with drain hose (J) that should be provided at your site. (Fig. 2)
• When connecting the drain hose to the hard vinyl chloride pipe, be sure to insert it securely into the pipe. (Fig. 3)
Drain
27-9/16 in.
hose
(70 cm) or
more
Downward
slope
Soft hose I.D.
19/32 in.
(15 mm)
Different diameter joint
Fig. 1 Fig. 2
The Drain hose is removed at installation.
• When routing the drain piping, make sure that the drain hose
(1) is routed as shown. (Fig. 4)
• Insert the drain hose all the way to the base of the drain
pan (end connection). (Fig. 5)
Make sure that the catch of the drain hose is securely
hooked onto the projection on the hose fitting of the drain
pan.
• After connecting the drain hose, be sure to pull the hose to
confirm that it is connected securely.
INDOOR UNIT
Grounding
Terminal block
terminal*
Disconnect
switch
208/230 VAC
1 phase, 60 Hz
OUTDOOR UNIT
Grounding terminal*
19/32 in.
(15 mm)
Lead
wire
Fig. 2
Drain hose
Hard vinyl chloride
pipe I.D. 1-3/16 in.
(30 mm)
Insert
securely
Water
Fig. 3 leakage
Electrical cover
Screw
Terminal block
Conduit plate
Grounding
terminal
• Make earth wire a little longer than others. (More than 45 mm)
• For future servicing, give extra length to the connecting wires.
• Do not fold the excess wire, or cram it into small space. Take caution not to damage the
wires.
• Be sure to attach each screw to its correspondent terminal when securing the cord and/
or the wire to the terminal block.
Do not make drain piping as shown below.
Accumulated
Do not raise
drain water
Air
Water
Waving
leakage
Fig. 4
Conduit pipe
Lock nut
Conduit pipe
At least
Tip of drain
1-31/32 in.
hose dipped
(50 mm) gap
in water
Water
Ditch
leakage
Projection
Pull the hose to
confirm it is con-
nected securely.
Make sure to
hook the catch.
Fig. 5
Drain hose
Pipe
cover
Electrical box
En-6