Indoor Unit Installation - Mitsubishi Electric MSZ-GS30 Installation Manual

2. INDOOR UNIT INSTALLATION

2-1. ATTACHING THE INSTALLATION PLATE
• To prevent installation plate (1) from vibrating, be sure to install the attachment screws in
the holes indicated in the illustration. For added support, additional screws may also be
installed in other holes.
When the indoor unit is to be attached to a concrete wall using recessed bolts, secure
installation plate (1) using 7/16 in. × 13/16 in. · 7/16 in. × 1 in. (11 mm × 20 mm · 11 mm
× 26 mm) oval hole (17-3/4 in. [450 mm] pitch).
2-2. DRILLING
1) Determine where the holes will be located on the wall.
2) Drill a ø 3 in. (75 mm) hole. The outdoor side should be 6/32 to 9/32 in. (5 to 7 mm) lower
than the indoor side.
3) Insert wall hole sleeve (C).
2-3. CONNECTING WIRES FOR INDOOR UNIT
Note:
When the indoor unit is powered from the outdoor unit, depending on local code, a discon-
nect switch needs to be installed to a power supply circuit.
1) Open the front panel.
2) Place the upper part of the indoor unit on the installation plate.
3) Remove electrical cover.
4) Remove VA clamp.
5) Remove corner box.
6) Remove cable guide.
7) Remove conduit plate.
8) Attach conduit pipe (for rear piping) / elbow joint (for right, left, or downward piping) to
conduit plate with lock nut. The thread of the installed conduit pipe / elbow joint appearing
inside should be less than 3/8 in. (10 mm). (Fig. 1) Elbow joint should appear less than
1-3/16 in. (30 mm) outside. (Fig. 2)
9) Process the end of ground wire (Fig. 3). Connect it to the ground terminal of electrical parts
box.
10) Process the end of indoor/outdoor unit connecting wire (A) (Fig. 3). 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.
11) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.
12) Reinstall conduit plate.
13) Reinstall cable guide.
14) According to the piping direction, remove the shaded part of the left side of box (Fig. 4)
or corner box (Fig. 5).
15) Reinstall VA clamp.
16) Reinstall electrical cover.
17) Reinstall panel assembly.
Remark:
* A disconnect switch should be
required.
Check the local code.
** Use a ring tongue terminal in
order to connect a ground wire
to terminal.
208/230 V AC
1phase, 60 Hz
OUTDOOR UNIT
Power supply
208/230 V AC,
1phase 2 wires,
60 Hz
Ground
INDOOR UNIT
Grounding
terminal**
Terminal block
Disconnect
switch*
Grounding terminal**
Installation plate (1)
Level
4-11/16 in.
Wall
(120 mm)
or more
Attachment screw (2)
In the case of left or left rear piping.
The position of the Liquid/Gas pipe
union is shifted 2-3/16 / 1-9/16 in.
(56/40 mm) to the left from the mark.
ø 3 in.
(75 mm)
Electrical cover
VA Clamp
Indoor
terminal
block
Cable guide
Conduit plate
Lock nut
• Connect wires to the appropriate
terminals
• For future servicing, leave some
slack in the connecting wires.
Conduit plate
Less than 3/8 in.
(10 mm)
Lock nut
Conduit pipe or
elbow joint
5/8 in.
(15 mm)
2-3/16 in.
(55 mm)
Lead
wire
• Make ground wire a little longer than
others. (More than 1-9/16 in. [40 mm])
Corner box
Remove panel for Remove panel
piping on bottom for piping on right
side of unit side of unit
2-13/16 in. (72 mm) or more
Ceiling
5-1/8 in. (130 mm) or more for left/
left rear piping (using spacer)
4 in.
8-11/16 in.
(100 mm)
(220 mm)
or more
Insert
Align the
the
Center of
scale. * scale with
ø 3 in.
the line. *
(75 mm)
hole
* Same for left hole.
Wall
6/32-9/32 in.
(5-7 mm)
Outdoor side
Pull tab to remove cable guide.
Electrical box
Grounding
terminal
Conduit pipe
or
Elbow joint
Conduit plate
Less than 1-3/16 in.
(30 mm)
Elbow joint
(for right, left, or downward piping)
Fig. 1
Remove panel
for piping on Remove panel for piping
left side of unit on bottom left side of unit
Fig. 3
Fig. 5
Wall
Fig. 2
Box
Fig. 4