Mitsubishi Electric FDT125VNVF Technical Manual page 227

○This model is high 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 supply specification
Accessory item
Hose clamp
1
For drain hose
mounting
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 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
controller 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.
Space for installation and service
●Make installation altitude over 2.5m.
Top view (Unit: mm)
All models
Over Working Over Working
900 space 900 space
Inspection hole
(600 x 600)
Blowing out
Inspection hole
(600 x 600)
Suction
If the conditions shown in the left hand side cannot be met, the
following method is also possible.
Top view (Unit: mm)
All models
The frontal view is as the left
hand illustration.
Air Conditions and Airflow Limits
Airflow m /min Temperature of the blow-in air of the indoor unit
3
Single Multi
Lower Upper
Rating Cooler
limit limit
Upper limit 26°C WB
When outdoor temperature is 35°C
200 224 51 38 65
Lower limit 16°C WB
When outdoor temperature is 15°C
Refer to the technical document published by our
250 280 68 51 87
company for more details.
Control box
Air outlet
Air inlet
This surface becomes
downside during installing.
○Pipes/Wires/Small parts ○Accessory items
Accessories storage position (during packing)
Documents and accessories
(Secure with adhesive tape)
Frontal view (Unit: mm)
Duct installing or removing space
All models
(Approve of the determine on site
Slab
that shorten this measurement)
Space for drain lap and drain inclination
Ceiling
(The same for the working space on the side and bottom faces.)
Over
400
Inspection hole
(900 x 1730) Piping space
60
Blowing out
100
Suction
Air temperature
surrounding
Heater
the indoor unit
Upper limit 27°C DB
Outdoor temperature is below 20°C WB
Lower limit 10°C DB
Dew point temperature
Outdoor temperature is above 10°C WB
below 28°C
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
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.
Suspension bolts pitch, Pipe position
20-M5 Screw
13
163 6X200=1200
35 1500 (Duct inner dimension)
830
18 18
Suspension bolt pitch 794
Control box
A
B
④Installation of indoor unit
Installation
[Hanging]
○Hang the unit up.
M10 nut
○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.
[Method for Fixing the Suspension Bolt]
○Secure the suspension bolt with one of the methods shown in the following illustration.
Insert
Horizontal Adjustment
○Use a level vial or adjust the level as shown in the following illustration.
Piping side
Pour water
Water
surface
0~5 mm
○If it is not horizontal, the float switch malfunctions or does not function.
(Packing Tools)
The packing tools (4) are not necessary.
Packing tools (4) should be removed.
Packing tools (4)
Wooden base
226
- -
'12 • PAC-T-174
Duct connecting port of air inlet 20-M5 Screw Air outlet
D
200 45 200
13
163 13
138 6X200=1200
35
60 1450 (Duct inner dimension)
80
510 25
25
Top surface
Bottom
surface
270 85
C
530
Symbol
A Refrigerant gas side piping
Unit: mm
B Refrigerant liquid side piping
C Drain piping connection port
D Power source inlet port
E Suspension bolt
Suspension bolt
Washer for M10
Unit
Spring washer for M10
150~
Reinforcing
160mm Hole-in anchor/
steel rod
Hole-in plug
Concrete
Suspension bolt M10
Vinyl hose
Set the pipe side slightly lower than the other side.
After removing the tools,
secure the screws again.
(for fixing the duct flange)
The wood screws should be removed.
E
13
138
60
Item