Indoor Unit Installation; Pipe Forming And Drain Piping - Mitsubishi Electric MSZ-LN25VG Installation Manual

2. INDOOR UNIT INSTALLATION

2-1. FIXING OF INSTALLATION PLATE
Find a structural material (such as a stud) in the wall and x installation plate (1) horizon
tally y tightening the xing screws (2) rmly
To prevent installation plate (1) from vi rating, e sure to install the xing screws in the
holes indicated in the illustration For added support, xing screws may also e installed
in other holes
When the knockout is removed, apply vinyl tape to the knockout edges to prevent damag
ing the wires
When olts recessed in the concrete wall are to e utilized, secure installation plate (1)
using 11 × 20 11 × 26 oval hole (450 mm pitch)
If the recessed olt is too long, change it for a shorter one availa le in the market
2-2. WALL HOLE DRILLING
1) etermine the wall hole position
2) rill a ø65 mm hole The outdoor side should e 5 to
7 mm lower than the indoor side
3) Insert wall hole sleeve (C)
Installation plate (1)
Level
101 mm
or more
Wall
Fixing
screw (2)
2-3. CONNECTING WIRES FOR INDOOR UNIT
ou 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 ack of the indoor unit and process
the end of the wire
4) Loosen terminal screw, and connect rst the earth wire, then indoor/outdoor unit con
necting wire (A) to the terminal lock
the terminal lock securely so that no part of its core is appeared, and no external force
is conveyed to the connecting section of the terminal lock
5) Firmly tighten the terminal screws to prevent them from loosening After tightening, pull
the wires lightly to con rm 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 left claw of the VA clamp Attach the VA clamp securely
15 mm
35 mm
Lead wire
For future servicing, give extra length to
the connecting wires
Make earth wire a little longer than others
(More than 60 mm)
o not fold the excess wire, or cram it into
small space Take caution not to damage
the wires
e sure to attach each screw to its corre
spondent terminal when securing the cord
and/or the wire to the terminal lock
Note: o not place the wires etween the
indoor unit and the installation plate (1)
amaged wire could cause heat genera
tion or re
Wall
ø65 mm
Ceiling 60 mm or more
150 mm or more for left and left
ack piping (using spacer)
111 mm
or more
100 mm
Insert the Align the
Center of
scale * scale with
ø65 mm hole
the line *
* Same for left hole
e careful not to make mis wiring Fix the wire to
VA clamp
Fixing screw
Indoor/outdoor unit
connecting wire (A)
Indoor terminal lock
Earth wire
S1 S2 S3
(green/yellow)
Indoor/outdoor
unit connecting
wire (A)
S1 S2 S3
Outdoor terminal lock

2-4. PIPE FORMING AND DRAIN PIPING

Pipe Forming
Place the drain hose elow the refrigerant piping
Make sure that the drain hose is not heaved or snaked
o not pull the hose when applying the tape
When the drain hose passes the room, e sure to wrap insula
tion material (o taina le at a store) around it
Rear, right, or downward piping
1) Put the refrigerant piping and the drain hose together, then
rmly apply piping tape (G) from the end
2) Insert the piping and the drain hose into the wall hole sleeve
(C), and hook the upper part of the indoor unit on the instal
lation plate (1)
3) Check if the indoor unit is hooked securely on the installation plate (1) y moving the
5 7 mm
unit to left and right
4) Thrust the lower part of the indoor unit into the installation plate (1)
Outdoor
side
Drain Piping
If the extension drain hose has to pass through a room, e sure to wrap it with commer
cially sold insulation
The drain hose should point downward for easy drain ow (Fig 1)
If the drain hose provided with the indoor unit is too short, connect it with drain hose (I)
that should e provided at your site (Fig 2)
When connecting the drain hose to the hard vinyl chloride pipe, e sure to insert it securely
into the pipe (Fig 3)
Wall
ownward
slope
Fig 1
o not make drain piping as shown elow
o not raise
Water Water
leakage leakage
Left or left-rear piping
Note:
e sure to reattach the drain hose
and the drain cap in case of left or
left rear piping
Otherwise, it could cause drops of
water to drip down from the drain
hose
1) Put the refrigerant piping and the drain hose together,
then rmly apply felt tape (4) from the end
Felt tape (4) overlap width should e 1/3 the tape width
Use a andage stopper at the end of felt tape (4)
2) Pull out the drain cap at the rear right of the indoor unit
(Fig 1)
old the convex section at the end and pull the drain
cap
3) Pull out the drain hose at the rear left of the indoor unit
(Fig 2)
old the claw marked y the arrows and pull out the
drain hose forward
4) Put the drain cap into the section to which the drain hose
is to e attached at the rear of the indoor unit (Fig 3)
Insert not sharp edged tools such as screwdrivers into
the hole at the end of the cap and insert the cap fully
into the drain pan
5) Insert the drain hose fully into the drain pan at the rear
right of the indoor unit (Fig 4)
Check if the hose is hooked securely to the projection
of its inserting part at the drain pan
6) Insert the drain hose into wall hole sleeve (C), and hook
the upper part of indoor unit on installation plate (1)
Then, move the indoor unit completely to the left in order
to make placing the piping in the ack space of the unit
easier
7) Cut out a piece of card oard from the shipping ox, roll
it up, hook it onto the ack ri , and use it as a spacer to
lift the indoor unit (Fig 5)
8) Connect the refrigerant piping with the extension pipe
( )
9) Thrust the lower part of the indoor unit into the installation
plate (1)
Felt tape (4)
Piping tape (G)
rain
hose
70 cm
pipe I
or more
Soft hose
I 15 mm
ifferent
diameter joint
Fig 2
Accumulated
drain water
Air
Water
Waving
leakage
Piping tape (G)
Felt tape (4)
Liquid pipe
Gas pipe
Indoor/outdoor unit
connecting wire (A)
rain hose
ard vinyl chloride
30 mm
Insert
securely
Fig 3
Tip of drain
At least
hose dipped 50 mm
in water gap
itch
Cut off in case of
left piping
rain cap
rain cap
Fig 1
rain hose
Fig 2
rain cap
Fig 3
rain hose
Fig 4
Fig 5