Installation manual
4
FHYCP + FCQ
Split System air conditioners
4PW23696-1
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 the used refrigerant.
■
If R-407C or R-410A refrigerant is used, apply ether 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
for the dimensions of flare nut spaces and the
appropriate tightening torque. (Overtightening may damage the
flare and cause leaks.)
Table 1
When connecting the flare nut, coat the flare both inside and outside
with refrigerating ether or ester oil and initially tighten by hand 3 or 4
turns before tightening firmly.
Coat here with ether oil or ester oil
■
Check the pipe connector for gas leaks, then insulate it as
shown in the figure below.
■
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.
D
RAIN
PIPING
WORK
Rig the drain piping as shown in the 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 4mm from
the hose.
-
Insulate the drain piping 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
-
Connect the drain hose to the drain raising pipes, and
insulate them.
-
Connect the drain hose to the drain outlet on the indoor unit,
and tighten it with the clamp.
PRECAUTIONS
■
Install the drain raising pipes at a height of less than 550 mm.
■
Install the drain raising pipes at a right angle to the indoor unit
and no more than 300 mm from the unit.
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
R-407C
R-410A
Ø6.4
14.2~17.2 N•m
(144~176 kgf•cm)
8.3~8.7
8.7~9.1
Ø9.5
32.7~39.9 N•m
(333~407 kgf•cm)
12.0~12.4
12.8~13.2
Ø12.7
49.5~60.3 N•m
(504~616 kgf•cm)
15.4~15.8
16.2~16.6
Ø15.9
61.8~75.4 N•m
(630~770 kgf•cm)
18.6~19.0
19.3~19.7
Ø19.1
97.2~118.6 N•m
(990~1210 kgf•cm)
22.9~23.3
—
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
R0.4~0.8
45
° ±
2
90
°±
2
A
5
4
2
1
3
1
Hanging bar
1
Clamp metal (supplied
with the unit)
2
Drain hose (supplied with
the unit)
3
White tape (field supply)
1
Ceiling slab
2
Hanger bracket
3
Adjustable range
4
Drain raising pipe
5
Drain hose (supplied with the unit)
6
Clamp metal (supplied with the unit)
NOTE
The incline of attached drain hose should be 75 mm or
less so that the drain socket does not have to
withstand additional force.
To ensure a downward slope of 1:100, install hanging
bars every 1 to 1.5 m.
When unifying multiple drain pipes, install the pipes as
shown in
. Select converging drain pipes
whose gauge is suitable for the operating capacity of
the unit.
1
T-joint converging drain pipes
1
1-1.5 m
2
1
3
