Indoor Unit Installation - Mitsubishi Electric MSZ-HR25VF Installation Manual

2. INDOOR UNIT INSTALLATION

2-1. FIXING OF INSTALLATION PLATE
• Find a structural material (such as a stud) in the wall and fix installation plate (1) horizon-
tally by tightening the fixing screws (2) firmly.
• To prevent installation plate (1) from vibrating, be sure to install the fixing screws in the
holes indicated in the illustration. For added support, fixing screws may also be installed
in other holes.
• When the knockout is removed, apply vinyl tape to the knockout edges to prevent damag-
ing the wires.
• When bolts recessed in the concrete wall are to be utilized, secure installation plate (1)
using 11 × 20 · 11 × 26 oval hole (450 mm pitch).
• If the recessed bolt is too long, change it for a shorter one available in the market.
2-2. WALL HOLE DRILLING
1) Determine the wall hole position.
2) Drill a ø65 mm hole. The outdoor side should be 5 to
7 mm lower than the indoor side.
3) Insert wall hole sleeve (C).
Installation plate (1)
Level
mm
153
or more
Wall
Fixing
screw (2)
Wall
ø65 mm
Outdoor
side
59 mm or more
Ceiling
mm or more for left/left rear
145
piping (using spacer)
163 mm
or more
100 mm
Align the
scale with Center of
Insert the scale. *
ø65 mm hole
the line. *
* Same for left hole.
2-3. CONNECTING WIRES FOR THE INDOOR UNIT
You can connect indoor/outdoor lead wire without removing the front panel.
1) Open the front panel.
2) Remove VA clamp.
3) Pass indoor/outdoor unit connecting wire (A) from the back of the indoor unit and process
the end of the wire.
4) Loosen terminal screw, and connect first the earth wire, then indoor/outdoor unit con-
necting wire (A) to the terminal block. Be careful not to make mis-wiring. Fix the wire to
the terminal block securely so that no part of its core is appeared, and no external force
is conveyed to the connecting section of the terminal block.
5) Firmly tighten the terminal screws to prevent them from loosening. After tightening, pull
the wires lightly to confirm that they do not move.
6) Secure indoor/outdoor unit connecting wire (A) and the earth wire with the VA clamp.
Never fail to hook the claw of the VA clamp. Attach the VA clamp securely.
5-7 mm
Wall
15 mm
35 mm
60 mm
or more
Others
Earth wire
• For future servicing, give extra length to the connecting wires.
• Make earth wire longer than others as picture.
• 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.
Note: Do not place the wires between the indoor unit and the installation plate (1).
Damaged wire could cause heat generation or fire.
VA clamp
Claw
Indoor/outdoor unit
connecting wire (A)
Indoor terminal block
Earth wire
(green/yellow)
Indoor/outdoor
unit connecting
15 mm
35 mm
wire (A)
Outdoor terminal block
Fixing screw
S1 S2 S3
S1 S2 S3