Indoor Unit Installation - Mitsubishi Electric MSZ-AY20VGK 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) horizontally 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 damaging 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).
Ceiling
Installation plate (1)
Level
106 mm
or more
Wall
Fixing screw (2)
Wall
ø65 mm
5-7 mm
Outdoor side
66 mm or more/
142 mm or more for left/left
rear piping (using spacer)
144 mm
or more
Wall
100 mm
Insert Align the
Center of
the scale with ø65 mm hole
scale. * 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 wire fixture.
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 connecting 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 wire
fixture. Never fail to hook the claw of the wire fixture. Attach the wire fixture
securely.
Terminal block
15 mm
35 mm
60 mm
15 mm
or more
35 mm
Others
Earth wire
Indoor terminal block
Earth wire (green/yellow)
Indoor/outdoor unit
connecting wire (A)
Outdoor terminal block
• 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.
Claw
Wire fixture
EN
Fixing screw
Indoor/outdoor unit
connecting wire (A)
EN-4