Mitsubishi KXZ Series Technical Manual page 99

①Before installation
●Install correctly according to the installation manual.
●Confirm the following points:
○Unit type/Power supply specification
○Pipes/Wires/Small parts ○Accessory items
Accessory item
For unit hanging For refrigerant pipe
Flat washer (M10)
Level gauge Pipe cover(big) Pipe cover (small)
8 1 1 1
For unit hight position adjustment For heat insulation For heat insulation
For unit hanging For pipe cover fixing
and hanging suport of gas pipe of liquid tube
②Selection of installation location for the indoor unit
① Select the suitable areas to install the unit under approval of the user.
・Areas where the indoor unit can deliver hot and cold wind sufficiently. Suggest to the user
to use a circulator if the ceiling height is over 3m to avoid warm air being accumulated on
the ceiling.
・In case of the panel having the motion sensor, the installation height must be no higher
than 4m. It could reduce the sensitivity of motion sensor, disabling the detection.
・Areas where there is enough space to install and service.
・Areas where it can be drained properly. Areas where drain pipe descending slope can be
taken.
・Areas where there is no obstruction of airflow on both air return grille and air supply port.
・Areas where fire alarm will not be accidentally activated by the air-conditioner.
・Areas where the supply air does not short-circuit.
・Areas where it is not influenced by draft air.
・Areas not exposed to direct sunlight.
・Areas where dew point is lower than around 28°C and relative humidity is lower than 80%.
This indoor unit is tested under the condition of JIS (Japan Industrial Standard) high humid-
ity condition and confirmed there is no problem. However, there is some risk of condensa-
tion drop if the air- conditioner is operated under the severer condition than mentioned
above.
If there is a possibility to use it under such a condition, attach additional insulation of 10 to
20mm thick for entire surface of indoor unit, refrigeration pipe and drain pipe.
・Areas where TV and radio stays away more than 1m. (It could cause jamming and noise.)
・Areas where any items which will be damaged by getting wet are not placed such as food,
table wares, server, or medical equipment under the unit.
・Areas where there is no influence by the heat which cookware generates.
・Areas where not exposed to oil mist, powder and/or steam directly such as above fryer.
・Areas where lighting device such as fluorescent light or incandescent light doesn't affect the
operation.
(A beam from lighting device sometimes affects the infrared receiver for the wireless remote
control and the air-conditioner might not work properly.)
②Check if the place where the air-conditioner is installed can hold the weight of the unit. If it is
not able to hold, reinforce the structure with boards and beams strong enough to hold it. If the
strength is not enough, it could cause injury due to unit falling.
③If there are 2 units of wireless type, keep them away for more than 6m to avoid malfunction due
to cross communication.
④When plural indoor units are installed nearby, keep them away for more than 4 to 5m.
Space for installation and service
●When it is not possible to keep enough space between indoor unit and wall or between indoor
units, close the air supply port where it is not possible to keep space and confirm there is no
short circuit of airflow.
●Install the indoor unit at a height of more than 2.5m above the floor.
4000 to 5000mm or more
Indoor unit
Ceiling
surface
Wall
1000mm or more
Decorative panel
1000mm or more
Obstacle
Set blow-out pattern
●Select the most proper number of blow-out air supply port direction from 4 way, 3 way or 2 way
according to the shape of the room and installation position. (1 way is not available.)
●If it is necessary to change the number of air supply port, prepare the covering materials.
(sold as accessory)
●Instruct the user not to use low fan speed when 2way or 3way air supply is used.
●Do not use 2way air supply port under high temperature and humidity environment.
(Otherwise it could cause condensation and leakage of water.)
●It is possible to set the airflow direction port by port independently. Refer to tne user's manual
for details.
When moving the indoor unit, hold only
the hanging hardware (4 places) only,
with care not to apply forces to any other
parts of the unit (particularly the refriger-
ant pipe, drain pipe, and resin parts).
For drain pipe
Pipe cover(small)
Strap Pipe cover(big) Drain hose Hose clamp
4 1 1 1 1
For heat insulation For heat insulation For drain pipe
For drain hose
of drain socket
of drain socket connecting mounting
Indoor unit
2500mm or more
Floor
Where there are pipe joints on
the way of embedded piping,
provide adequate openings for
inspection of the joints.
③Preparation before installation
●If suspension bolt becomes longer, do reinforcement of earthquake resistant.
○For grid ceiling
When suspension bolt length is over 500mm, or the gap between the ceiling and roof is
over 700mm, apply earthquake resistant brace to the bolt.
○In case the unit is hanged directly from the slab and is installed on the ceiling plane which
has enough strength.
When suspension bolt length is over 1000mm, apply the earthquake resistant brace to the bolt.
●Prepare four (4) sets of suspension bolt, nut and spring washer (M10 or M8) on site.
Ceiling opening, Suspension bolts pitch, Pipe position
※It is possible the suspension bolts pitch to
adjust accoding to the this table.
Mark
P1
Type
1
770
2 770−800
Ceiling hole size (860
Suspension bolts pitch P1 (778)
H1, H2
H1, H2
H1, H2
Drain hose
245
(Accessory)
333 303
(Installed on site)
C
F
Hanger plate
for suspention bolt
Control box
④Installation of indoor unit
Work procedure
1. Set the suspension bolt length to about 50mm from the ceiling.
2. Temporarily locate the lower nuts of the suspension bolts (4 places) at a position approxi-
mately 150mm from the ceiling.
3. Temporarily locate the upper nuts of the suspension bolts (4 places) at positions sufficiently
distance from the lower nuts so that they do not interfere with the suspension of the indoor
unit and with its height adjustment.
4. Set the upper nuts of the suspension bolts and upper washers (4 places) at positions sufficiently
distance from the lower nuts. Then, push and insert the temporary fixing carton of washers (*1)
onto suspension bolts. Make sure that the upper washers do not slide down.
5. Suspend the indoor unit.
6. After suspending the indoor unit, mount the level gauge (*2) to the air outlet of the indoor
unit, and adjust the suspension height of the indoor unit. Loosen the upper nuts (4 places),
and adjust the suspension height using the lower nuts (4 places). Confirm there is no slack
between the lower nuts and flat washers of the indoor unit hanger plate (4 places).
7. Remove the temporary fixing carton of washers (from all 4 places).
8. Make sure that the indoor unit is installed horizontally. Confirm the levelness of the indoor
unit using a level gauge or transparent hose filled with water.
(Keep the height difference at both ends of the indoor unit within 3mm.)
9. Tighten the upper nuts of the suspension bolts (4 places).
Keep the distance between 10-14 mm.
Exceeding the range of distance may
cause failure etc.
+4
10 mm
0
Ceiling opening dimensions
Level gauge（*2）
(Mount to the indoor unit.)
96
- -
'20 • KX-T-373
Series Type
40 to 71 type 236
Single Split (PAC)
series
100 to 140 type 298
P2
28 to 71 type 236
90 to 160 type 298
725−770
Symbol
725
A Gas piping
B Liquid piping
−
910)
C Drain piping
D Hole for wiring
F Suspension bolts
G
G Outside air opening for ducting
H1
Air outlet opening for ducting
Control box
H2
H1, H2
50
65
44
G
A B
140
60
100
D
H1
Suspension bolt
Nut (upper)
Flat washer
Spring wasler
Lower nuts (double)
150mm
50mm
Ceiling surface
Remove the temporary fixing carton of
Temporary fixing carton of washers (*1)
washers (*1) and level gauge (*2).
Temporary fixing carton of washers (*1)
There is no slack between the
lower nuts and flat washers.
Level gauge（*2）
indoor unit
hose
(mm)
a d f g h
37 105 88 67
99 167 140 129
37 105 88 67
99 167 140 129
38
13
240
130
200
H2