Daikin FXLQ18MVJU Specifications download pdf (Page 21)

EDUS39-600-F7 Installation

FXLQ-M / FXNQ-M 20

5. INDOOR UNIT INSTALLATION

As for the parts to be used for installation work, be sure to use

the provided accessories and specific Daikin parts.

(1) Level the indoor unit with the leveling screws (7). If

the floor is too uneven to level the unit, place the unit

on a flat surface and level it.

(2) If the unit is in danger of falling over, either fasten to

the wall using the holes provided, or fasten to the

floor with an optional floor fastener.

(3) The legs can be retracted if the indoor unit is to be

hung on a wall. To do so, lift the legs as shown in the

following figure.

NOTE

• Use the installation mount for installation. Check whether

the wall is strong enough to bear the weight of the unit or

not. If there is a risk, reinforce the wall before installing the

unit.

• The unit requires a minimum 2.5 inch clearance on the

underside for air intake. Ensure the unit is level when

installed so that drainage flows smoothly. If tilted or on an

incline, water can leak.

• Operating sound may be louder if installed on a more solid

wall.

(4) Perform the following procedure to mount the

optional remote controller on the unit if desired.

(FXLQ type only)

(5) Open the left side of control panel and mount the

lower case of the remote controller.

•

See the installation manual

attached to the remote control-

ler for instructions on fastening

screws and wiring the remote

controller.

NOTE

• Setting the unit at an angle opposite to the drain piping

might cause leaks.

6. REFRIGERANT PIPING WORK

For refrigerant piping of outdoor units, see the installa-

tion manual attached to the outdoor unit.

Execute heat insulation work completely on both sides of

the gas piping and the liquid piping. Otherwise, a water

leakage can result.

When using a heat pump, the temperature of the gas piping

can reach up to approximately 250°F, so use sufficiently resis-

tant insulation.

In cases where the temperature and humidity of the

refrigerant piping sections might exceed 86°F or RH80%,

reinforce the refrigerant insulation by 13/16” or thicker.

Condensate may form on the surface of the insulating

material.

Before refrigerant piping work, check which type of refrig-

erant is used. Proper operation is not possible if the types

of refrigerant are not the same.

NOTE

• Use a pipe cutter and flare suitable for the type of refrig-

erant.

• To prevent dust, moisture or other foreign matter from

infiltrating the tube, either pinch the end or cover it with

tape.

• Do not allow anything other than the designated refrig-

erant to get mixed into the refrigerant circuit, such as

air, etc.

• If any refrigerant gas leaks while working on the unit,

immediately ventilate the room.

When connecting refrigerant piping:

• Ensure that theoutdoor unit is charged with refrigerant.

• Use copper alloy seamless pipes.

• To prevent flare nut cracking and gas leaks, be sure to use

both a spanner and torque wrench together, as shown in

the drawing, when connecting or disconnecting pipes to /

from the unit.

• Refer to Table 2 for the dimensions of flare.

Leveling screws (7)

(accessory)

Lift legs.

FXLQ

Lift legs.

FXNQ

Installation

screw

Lower case

of remote

controller

Lid of control

panel

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Daikin FXLQ18MVJU Specifications Page 21

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