Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 118

D
○This model is middle static ducted type air-conditioning unit. Therefore, do not use this model for direct
blow type air-conditioning unit.
①Before installation
●Install correctly according to the installation manual.
●Confirm the following points:
○Unit type/Power source specification
Accessory item
For hanging For refrigerant pipe
Flat washer (M10) Pipe cover (big) Pipe cover (small)
8 1
For unit For heat insulation For heat insulation
of liquid tube
hanging of gas pipe
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.
・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 humidity
condition and confirmed there is no problem. However, there is some risk of condensation
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.)
② Check 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.
Space for installation and service
●Make installation altitude over 2.5m.
(Indoor Unit)
Select either of two cases to keep space for installation and services.
(Case 1) From side of unit
Inspection
hole
(450x450)
Note (a)
Notes (a) There must not be obstacle to draw out fan motor. (
(b) Install refrigerant pipe, drain pipe, and wiring so as not to cross
(Case 2) From bottom of unit
Inspection
hole
○Pipes/Wires/Small parts
For drain pipe
Strap Pipe cover (big) Pipe cover (small) Drain hose
1 4 1 1 1
For pipe For heat insulation For heat insulation For drain pipe
cover fixing of drain socket
of drain socket connecting
Note (b)
Slab
Ceiling
100-200
B
(Size of inspection hole) UNIT: mm
Single type 40-50 60-71 100-140
Multi type 22-56 71-90 112-160
A 1100 1300 1720
B 620 725
③Preparation before installation
●If suspension bolt becomes longer, do reinforcement of earthquake resistant.
○For grid ceiling
When the 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
○Accessory items
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) on site.
Hose clamp
Suspension Bolt Location
1
For drain hose Accessory parts are stored
mounting inside this suction side.
Multi type
Single type
A
B
C
Pipe locations UNIT: mm
Multi type
Single type
Multi type
Single type
④Installation of indoor unit
UNIT: mm
Installation
[Hanging]
Hang the unit up.
370
Adjustment for horizontality
marked area)
marked area.
○Either use a level vial, or adjust the level according to the method below.
UNIT: mm
●Adjust so the bottom side of the unit will be leveled with the water surface as
illustrated below.
○If the unit is not leveled, it may cause malfunctions or inoperation of the float switch.
117
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A
Return duct
Unit
Air supply duct
UNIT: mm
22-56 71, 90 112-160
40-50 60, 71 100-140
786 986 1404
472 472 530
135 135 180
22-90
40-71
510
471
413
467
Refrigerant gas pipe
(For natural drainage)
Refrigerant liquid pipe drain pipe connection VP20 (PVC pipe)
112-160
100-140
635
468
405
467
Refrigerant gas pipe
(For natural drainage)
Refrigerant liquid pipe drain pipe connection VP20 (PVC pipe)
Suspension bolt
M10 nut
Washer for M10
Unit
Spring washer for M10
Pipe side
Pour water
Water
surface
0~5mm
Vinyl hose
Let the pipe side be slightly sloped.
'17 • SCM-T-225
Suspension
bolt (M10)
○ Adhere to the
measurements given
below for the length of
the suspension bolts.
drain pipe connection
(PVC pipe) (Drain hose VP25)
drain pipe connection
(PVC pipe) (Drain hose VP25)
If the measurements between
the unit and the ceiling hole do
not match upon installation, it
may be adjusted with the long
holed installation tool.