Daikin FXMQ96MVJU Installation Manual download pdf (Page 6)

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5. INDOOR UNIT INSTALLATION

Installing optional accessories before installing the indoor

unit is easier.

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

the provided accessories and specified parts designated by our

company.

(1) Fix the hanger bracket to the suspension bolt. Tighten both

upper and lower nuts firmly using washers.

(2) Adjust the height of the unit.

(3) Make sure the unit is

level.

• Level the unit with

a level when install-

ing. If the unit is not

level, it could

become the source

of water leaks.

• When leveling the

unit, check all four

corners with a level

or a vinyl tube con-

taining water. (See

the figure on the

right.)

(4) Tighten the nuts on the top.

(5) Insulate the two hanger brackets on the discharge side with

the insulation material. Insulate the edges so that the sur-

face and edges of the hanger brackets cannot be seen.

CAUTION

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 installation

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 sometimes.〉

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

can reach up to approximately 248°F, so use insulation which is

sufficiently resistant.)

〈

Also, in cases where the temperature and humidity of the

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

force the refrigerant insulation. (3/4in. or thicker) Condensa-

tion 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.〉

CAUTION

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

erant.

• Apply ester oil or ether oil inside the flare portions

before connecting.

• 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, ventilate the room thoroughly right away.

• The outdoor unit is charged with refrigerant.

• 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.

• 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.

• Refer to the Table 1 for the dimensions of flare nut spaces.

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

with ester oil or ether oil, rotate three or four times first, then

screw in.

• Refer to the Table 1 for tightening torque.

• Ventilate if refrigerant gas leaks while performing work.

Tabl e 1

NOTE

The flare nuts used must be those included with the

main body.

Part to be procured in the field

Tighten from above and below

(Double nut)

Washer (accessory (7))

Insulation material

(accessory (6))

A-A cross-section

Hanger bracket

setting bolt

Vinyl tube

Hanger bracket setting bolt

Level

B-B cross-section

Pipe

size

Tightening torque

(ft.lbf)

Flare

dimensions

A (in.)

Flare shape (in.)

1/4

”

10.4

12.7 0.342

0.358

3/8”

24.1

29.4 0.504

0.520

1/2”

36.5

44.5 0.638

0.654

5/8”

45.6

55.6 0.760

0.776

R0.016-

0.031

±2

Ester oil or ether oil.

Torque wrench

Spanner

Piping union

Flare nut

01_EN_3P086156-13Y.fm Page 5 Wednesday, September 16, 2009 2:22 PM

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Daikin FXMQ96MVJU Installation Manual Page 6

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