F) Duct Connected-High Static Pressure Type (Fdu) - Mitsubishi Heavy Industries FDT28KXE6A Service Manual

(f) Duct connected High static pressure type (FDU)
(1) Models 71～140
○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 supply specification
○Pipes/Wires/Small parts
○Accessory items
Accessory item
For refrigerant pipe
Pipe cover(big) Pipe cover (small)
1 1
For heat insulation
For heat insulation
of gas pipe of liquid tube
For drain pipe
Pipe cover(small)
Pipe cover(big)
1 1
For heat insulation
For heat insulation
of drain socket
of drain socket
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.
(Indoor Unit)
Installation Space
635
Inspection
hole
Strap
Accessory parts are stored inside
this suction side.
4
For pipe cover fixing
Drain hose Hose clamp
1 1
For drain pipe For drain hose
connecting mounting
UNIT: mm
Multi type 71 90, 112, 140
Single type 71 100, 125, 140
A 1200 1720
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 Bolt Location
A
Multi type 71
Single type 71 100, 125, 140
A 986
Pipe locations UNIT: mm
Multi type 71
Single type 71
Multi type 90, 112, 140
Single type 100, 125, 140
④Installation of indoor unit
Installation
[Hanging]
Hang the unit up.
Suspension bolt
M10 nut
Washer for M10
Unit
Spring washer for M10
Adjustment for horizontality
○Either use a level vial, or adjust the level according to the method below.
●Adjust so the bottom side of the unit will be leveled with the water surface as
illustrated below.
Pipe side
Pour water
Water
surface
0~5mm
Let the pipe side be slightly sloped.
○If the unit is not leveled, it may cause malfunctions or inoperation of the float switch.
151
- -
PJC012D048
Suspension bolt (M10)
Unit
UNIT: mm
90, 112, 140
1406
70
Liquid
piping
58 25
Gas
71 100
piping
150
Air outlet duct
260
Drain
(Connectable with VP20)
Drain
(Natural drainage VP25)
28
70
Liquid
piping
58
Gas
77
piping
Air outlet duct
260
Drain
(Connectable with VP20)
Drain
(Natural drainage VP25)
28
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.
Vinyl hose
b
○ Adhere to the
measurements given
below for the length of
the suspension bolts.
25
100
150