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EDUS39-600-F1_a Installation

FXFQ-M 27

Ceiling work

(2) Adjust the unit to the correct position for installation.

(Refer to Section 4. (1) PREPARATIONS BEFORE

INSTALLATION, P. 67.

(3) Make sure the unit is horizontally level.

• The indoor unit is equipped with a built-in drain

pump and float switch. At each of the unit’s 4 cor-

ners, verify that it is level by using a waterlevel or a

water-filled vinyl tube.

If the unit is inclined against condensate flow, the

float switch may malfunction and cause water to

drip.

(4) Remove the washer-fixing plate (7) used for preventing

the washer from falling and tighten the upper nut.

(5) Remove the paper pattern for installation (5).

6-2 For existing ceilings

(6) Adjust the height and position of the unit.

Refer toPREPARATIONS BEFORE INSTALLATION-(1).

(7) Perform steps (4), (5) in “6-1 For new ceilings”.

7. REFRIGERANT PIPING WORK

7-1 GENERAL INSTRUCTIONS

•

For refrigerant piping of outdoor units, see the installation man-

ual attached to the outdoor unit.

• Before refrigerant piping work, check which type of refriger-

ant is used. Proper operation is not possible if the types of

refrigerant are not the same.

• The outdoor unit is charged with refrigerant.

DANGER

• Refrigerant gas may produce toxic gas if it comes in contact

with fire such as from a fan, heater, stove or cooking device.

Exposure to this gas could result in severe injury or death.

NOTE

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

ant.

• To prevent dust, moisture or other foreign matter from infiltrat-

ing the tube, either pinch the end or cover it with tape.

• Do not allow anything other than the designated refrigerant to

get mixed into the refrigerant circuit, such as air. If any refrig-

erant gas leaks while working on the unit, ventilate the

room immediately. .

7-2 Connecting the refrigerant piping

• When connecting the flare nut, coat the flare both inside

and outside with ester

oil or ether oil and initially tighten by

hand 3 or 4 turns before tightening firmly.

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

both a spanner and torque wrench together, as shown in the

drawing below, when connecting or disconnecting pipes to/

from the unit.

Paper pattern for

installation 5)

Center of the unit

Center of ceiling opening

Ceiling material

Lower surface

of ceiling

[Height adjustment of the unit.]

Screws 6)

(attached)

[Installation of paper pattern for installation]

Water level

Vinyl tube

Ester oil or ether oil.

Torque wrench

Spanner

Piping union

Flare nut

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 37 38

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