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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 intake kit 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
1
Nut (field supplied)
2
Washer (supplied with the unit)
3
Hanger bracket
4
Double nut (field supply, tighten)
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
1
Paper pattern for installation
2
Centre of the ceiling opening
3
Centre of the unit
4
Screws (supplied with the unit)
•
Adjust the height of the unit until it matches the indication in
figure
8.
3.
Adjust the unit to the right position for installation.
(Refer to
"Preparations before installation" on page
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 the
direction of the condensate flow (the drain piping side is raised),
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
1
Water level
2
Vinyl tube
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.
All field piping must be provided by a licensed refrigeration
technician and must comply with the relevant local and
national codes.
■
Use a pipe cutter and flare suitable for the used refrigerant.
■
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.
FXFQ20~125AVEB
VRV System air conditioners
3P320142-1A – 2012.10
figure
6.
figure
8.
3.)
figure
12.
■
To prevent water leakage, execute heat insulation work
completely on both sides of the gas and liquid piping. When
using a heat pump, the temperature of the gas piping can reach
up to approximately 120°C, use insulation which is sufficiently
heat resistant.
■
Be sure to use both a spanner and torque wrench together when
connecting or disconnecting pipes to/from the unit.
1
Torque wrench
2
Spanner
3
Piping union
4
Flare nut
■
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
Tightening
Pipe gauge
torque
Ø6.4
15~17 N•m
Ø9.5
33~39 N•m
Ø12.7
50~60 N•m
Ø15.9
63~75 N•m
■
When connecting the flare nut, coat the flare inner surface with
ether oil or ester oil and initially tighten 3 or 4 turns by hand
before tightening firmly.
■
If the refrigerant gas leaks during the work, ventilate the area. A
toxic gas is emitted by the refrigerant gas being exposed to a fire.
■
Make sure there is no refrigerant gas leak. A toxic gas may be
released by the refrigerant gas leaking indoor and being
exposed to flames from an area heater, cooking stove, etc.
■
Finally, insulate as shown in the figure below (use the supplied
accessory parts)
4
5
3
5
1
2
1
2
3
4
Flare dimension A
(mm)
Flare shape
8.7~9.1
90° ±2
12.8~13.2
A
16.2~16.6
R0.4~0.8
19.3~19.7
1
Liquid pipe
2
Gas pipe
3
Insulation for fitting for liquid
pipe
4
Insulation for fitting for gas
pipe
5
Clamps
(use 2 clamps per insulation)
Installation and operation manual
4
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