Indoor Unit Installation - Mitsubishi Electric MFZ-KA25VA Manual De Instrucciones

2. INDOOR UNIT INSTALLATION

2-1. FIXING OF INDOOR UNIT MOUNTING BRACKET
• Find a structural material (such as a stud) in the wall and fix bracket (7) horizontally with fixing screws (8).
• To prevent bracket (7) from vibrating, be sure to install the fixing screws in the holes indicated by [->] in the illustration. For added support, fixing screws
may also be installed in other holes.
2-2. HOLE DRILLING
1) Determine the wall hole position.
2) Drill a dia. 65 mm hole (dia. 75 mm for KA50). The outdoor side
should be 5 to 7 mm lower than the indoor side.
3) Insert wall hole sleeve (C).
HOLE POSITIONS
FOR REAR OR LEFT-REAR PIPING
(The following figure is a front view
of the indoor unit installation location.)
2-3. INDOOR UNIT PREPARATION
1) Press the 2 positions indicated by the arrows and open the front
grille.
2) Open the front grille and remove the two screws.
3) Open the horizontal vane for the upper air outlet, push the top of the
front panel in three locations, and then pull the top of the grille away
from the indoor unit.
4) Lift up the front grille to remove it.
2-4. INDOOR UNIT INSTALLATION
• Hook the top of the indoor unit on the indoor unit mounting bracket (7).
• Use the included wood screws (9) and washer (10), and fasten the
indoor unit at 2 locations( ) each at the top and the middle of the
unit.
2-5. EMBEDDING THE INDOOR UNIT IN A
WALL
• When installing a grating, use a grating with narrow upper and lower
horizontal bars so that the airflow from the upper and lower air out-
lets does not contact the bars. If the horizontal bars will block the
lower air outlet, use a stand, etc., to adjust the height of the indoor
unit. If the upper or lower air outlet is blocked, the air conditioner will
not be able to cool or warm the room well.
• Do not block the receiver with the grating. Otherwise, the grating will
interfere with the remote controller signal and significantly reduce the
distance and area (angle) from which the signals can be received.
• Use a grating with vertical bars, etc., that has at least 75% open
area. If the grating has horizontal bars or if the open area is less
than 75%, performance could be reduced.
• When the indoor unit is embedded in a wall (built-in), the time it
takes for the room temperature to reach the set temperature will in-
crease.
EMBEDDED INDOOR UNIT SETTING (MUST BE PERFORMED)
• When embedding the indoor unit in a wall, restrict the movement of
the horizontal vane for the upper air outlet so that it only operates
horizontally.
• If this setting is not performed, heat will build up in the wall and the
room will not be cooled or warmed properly.
• Cut the wires on the left and right sides of JRFBL using a pair of nip-
pers, etc., as shown below.
4
FOR RIGHT DOWNWARD OR LEFT DOWN-
WARD PIPING
(The following figure is a view of the bottom of
the indoor unit from above.)
screws
100 or more
Lower air outlet
Wall
ø65mm (KA25/35)
ø75mm (KA50)
FOR LEFT PIPING
When the unit is
installed on the wall.
When the unit is
installed on the floor.
100 or more
Upper air outlet
Receiver
Control board
Cut
Cut the wires on both ends.
5 - 7 mm
Outdoor
side
FOR RIGHT PIPING
100 or
more
Indoor
unit
Grating
25 - 35
Cut the JRFBL wires.