FXCQ20~125M7V1B
VRV System air conditioners
4PW15108-1
Installation and operation manual
3
4.
Adjust the unit to the right position for installation.
(Refer to the chapter "
Preparations before installation
5.
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
.
6.
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.
Before rigging tubes, check which type of refrigerant is used.
■
Use a pipe cutter and flare suitable for R-410A.
■
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.
■
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.)
■
When connecting the flare nut, coat the flare both inside and
outside with ether oil or ester oil and initially tighten by hand 3 or
4 turns before tightening firmly.
■
Check the pipe connector for gas leaks.
■
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.
■
Finally 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.
Table 1
D
RAIN
PIPING
WORK
Rig the drain piping as shown in figure and take measures against
condensation. Improperly rigged piping could lead to leaks and
eventually wet furniture and belongings.
1.
Install the drain pipes.
•
Keep piping as short as possible and slope it downwards so that
air may not remain trapped inside the pipe.
•
Keep pipe size equal to or greater than that of the connecting
pipe (Vinyl pipe of 25 mm nominal diameter and 32 mm outer
diameter).
•
Insert the supplied drain hose into the drain socket, up to the
white tape.
•
Tighten the clamp until the screw head is less then 4 mm from
the hose.
•
Insulate the drain hose inside the building.
•
If the drain hose cannot be sufficiently set on a slope, fit the hose
with drain raising piping (field supply).
How to perform piping
1
Connect the drain hose to the drain raising pipes, and insulate
them.
2
Connect the drain hose to the drain outlet on the indoor unit, and
tighten it with the clamp.
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
Coat here with ether oil or
ester oil
1
Liquid pipe
2
Gas pipe
3
Insulation for fitting of liquid line
(supplied with the unit)
4
Insulation for fitting of gas line
(supplied with the unit)
5
Clamps
(use 2 clamps per insulation)
2
3
1
4
5
3
2
1
4
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
Hanging bar
1
Clamp metal
2
Drain hose
3
White tape (field supply)
1
Ceiling slab
2
Hanger bracket
3
Adjustable (310 or less)
4
Drain raising pipe
5
Drain hose (supplied with the unit)
6
Clamp metal (supplied with the unit)
R0.4~0.8
45
° ±
2
90
°±
0.5
A
1-1.5 m
1
2
1
3
