Daikin FXFQ20M8V3B, Installation And Operation Manual

Page: 6 / 16

Installation and operation manual
3
FXFQ20~125M8V3B
VRV System air conditioners
4PW25082-1A
I
NSTALLATION PROCEDURES FOR FRESH AIR
INTAKE DUCT CONNECTION
1. Preparing the connection hole
(See figure 10) .
• Cut off the knockout hole on the side plate with a nipper.
• Cut the inner insulation of the hole portion with a cutter.
2. Placing the insulation (See figure 11) .
• Put the insulation tightly around the hole of the unit as shown.
The ends of the side plate and the inner insulation must be
completely adhered without leaving any clearance along the
circumference of the hole.
Make sure the inner surface of insulation tightly contacts the inner
insulation edge and the side plate.
I
NDOOR UNIT INSTALLATION
When installing optional accessories (except for the decoration
panel), read also the installation manual of the optional accessories.
Depending on the field conditions, it may be easier to install optional
accessories before the indoor unit is installed. However, for existing
ceilings, install fresh air inlet component kit and branch duct before
installing the unit.
1. Install the indoor unit temporarily.
• Attach the hanger bracket to the suspension bolt. Be sure to fix it
securely by using a nut and washer from the upper and lower
sides of the hanger bracket.
Securing the hanger bracket see figure 6 .
2. Fix the paper pattern for installation. (For new ceilings
only.)
• The paper pattern for installation corresponds with the measure-
ments of the ceiling opening. Consult the builder for details.
• The centre of the ceiling opening is indicated on the paper
pattern for installation. The centre of the unit is indicated on the
unit casing and on the paper pattern for installation.
• After removing the packaging material from the paper pattern for
installation, attach the paper pattern for installation to the unit
with the attached screws as shown in
figure 7 .
• Adjust the height of the unit until it matches the indication in
figure 7 .
3. Adjust the unit to the right position for installation.
(Refer to the chapter " Preparations before installation ".)
4. Check if the unit is horizontally levelled.
• Do not install the unit tilted. The indoor unit is equipped with a
built-in drain pump and float switch.
(If the unit is tilted against condensate flow, the float switch may
malfunction and cause water to drip.)
• Check if the unit is levelled at all four corners with a water level or
a water-filled vinyl tube as shown in figure 15.
5. Remove the paper pattern for installation. (For new ceilings
only.)
R
EFRIGERANT PIPING WORK
For refrigerant piping of outdoor unit, refer to the installation manual
supplied with the outdoor unit.
Execute heat insulation work completely on both sides of the gas
piping and the liquid piping. Otherwise, this can sometimes result in
water leakage.
Before rigging tubes, check which type of refrigerant is used.
■
Use a pipe cutter and flare suitable for the used refrigerant.
■
Apply ether oil or ester oil around 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.
■
Use copper alloy seamless pipes (ISO 1337).
■
The outdoor unit is charged with refrigerant.
■
Be sure to use both a spanner and torque wrench together when
connecting or disconnecting pipes to/from the unit.
■
Do not mix anything other than the specified refrigerant, such as
air, etc.., inside the refrigerant circuit.
■
Refer to Table 1 for the dimensions of flare nut spaces and the
appropriate tightening torque. (Overtightening may damage the
flare and cause leaks.)
Table 1
1 Piping
2 Drain pipe
3 Side plate
4 Inner insulation
5 Slit
1 Insulation (field supply)
2 Side plate
3 Inner insulation
1 Nut (field supplied)
2 Washer (supplied with the unit)
3 Hanger bracket
4 Tighten (double nut)
1 Height adjustment of the unit
2 Ceiling material
3 Paper pattern for installation
4 Installation of paper pattern for installation (supplied with the
unit)
5 Centre of the ceiling opening
6 Centre of the unit
7 Screws (supplied with the unit)
1 Water level
2 Vinyl tube
All field piping must be provided by a licensed refrigeration
technician and must comply with the relevant local and
national codes.
1 Torque wrench
2 Spanner
3 Piping union
4 Flare nut
Pipe gauge Tightening torque
Flare dimension A
(mm) Flare shape
Ø6.4
14.2~17.2 N•m
(144~176 kgf•cm)
8.7~9.1
Ø9.5
32.7~39.9 N•m
(333~407 kgf•cm)
12.8~13.2
Ø12.7
49.5~60.3 N•m
(504~616 kgf•cm)
16.2~16.6
Ø15.9
61.8~75.4 N•m
(630~770 kgf•cm)
19.3~19.7
1 2
4
3
R0.4~0.8
45
° ±
2
90
°±
2
A