Mitsubishi Heavy Industries FDC Series Technical Manual Download

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204

'12 • PAC-T-173

Before installation

Selection of installation location for the indoor unit

Accessory item

For unit hanging

For refrigerant pipe

For drain pipe

Flat washer (M10)

Level gauge

Pipe cover(big)

Pipe cover (small)

Pipe cover(big)

Pipe cover(small)

Drain hose

Hose clamp

Strap

For unit hanging

For heat insulation
of gas pipe

For heat insulation
of liquid tube

For pipe cover fixing

For drain hose
mounting

For unit hanging
and adjustment

For heat insulation
of drain socket

For drain pipe
connecting

Select the suitable areas to install the unit under approval of the user.

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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.

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Areas where there is enough space to install and service.

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Areas where it can be drained properly. Areas where drain pipe descending slope can be
taken.

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Areas where there is no obstruction of airflow on both air return grille and air supply port.

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Areas where fire alarm will not be accidentally activated by the air conditioner.

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Areas where the supply air does not short-circuit.

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Areas where it is not influenced by draft air.

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Areas not exposed to direct sunlight.

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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.

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Areas where TV and radio stays away more than 1m. (It could cause jamming and noise.)

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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.

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Areas where there is no influence by the heat which cookware generates.

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Areas where not exposed to oil mist, powder and/or steam directly such as above fryer.

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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.)

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.

If there are 2 units of wireless type, keep them away for more than 6m to avoid malfunction due

to cross communication.

When 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.

Indoor unit

Wall

Ceiling
surface

Decorative panel

1000mm or more

4000 to 5000mm or more

1000mm or more

2500mm or more

Obstacle

Floor

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.

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.

Preparation before installation

Ceiling opening, Suspension bolts pitch, Pipe position

Installation of indoor unit

Work procedure

1. Prepare a ceiling hole with the size of from 860mm × 860mm to 910mm × 910mm

referring to the template attached in the package.

2. Arrange the suspension bolt at the right position (725mm×778mm).
3. Make sure to use four suspension bolts and fix them so as to be able to hold 500N load.
4. Ensure that the lower end of the suspension bolt should be 50mm above the ceiling

plane. Temporarily put the four lower nuts 150mm above the ceiling plane and the upper
nuts on distant place from the lower nuts in order not to obstruct hanging the indoor unit
or adjust the indoor unit position, and then hang the indoor unit.

5. Adjust the indoor unit position after hanging it by inserting the level gauge attached on

the package into the air supply port and checking if the gap between the ceiling plane
and the indoor unit is appropriate. In order to adjust the indoor unit position, adjust the
lower nuts while the upper nuts are put on distant place. Confirm there is no backlash
between the hanger plate for suspension bolt and the lower nut and washer.

control box

345

260

303

Drain hose piece

(Accessory)

control box

Air return grille

Air filter

860 to 910 (Ceiling hole size)

778 (Suspension bolts pitch)

725 (Suspension bolts pitch)