6
3P086154-3R
English
(4)
Perform the following procedure to mount the re-
mote controller (optional accessory) on the unit if
desired. (FXLQ type only)
•
Open the left side lid of control panel and mount the
lower case of the remote controller.
See the installation manual at-
tached to the remote control-
ler for instructions on screw
fastening and wiring for the
remote controller.
Installation
screw
Lower case
of remote
controller
Lid of control
panel
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 installa-
tion manual attached to the outdoor unit.
Execute heat insulation work completely on both sides of
the gas piping and the liquid piping. Otherwise, conden-
sation may occur causing water damage.
(When using a heat pump, the temperature of the gas piping
can reach up to approximately 250°F (120°C), so use insula
-
tion that is sufficiently resistant.)
Also, in cases where the temperature and humidity of
the refrigerant piping sections might exceed 86°F (30°C)
or RH80%, reinforce the refrigerant insulation. (13/16”
(20 mm) or thicker) Condensate 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.
NOTE
•
Use a pipe cutter and flare suitable for the type of refriger
-
ant.
•
To prevent dust, moisture or other foreign matter from infil
-
trating the tube, either pinch the end or cover it with tape.
•
Do not allow anything other than the designated refrigerant
to get mixed into the refrigerant circuit, such as air, etc.
•
If any refrigerant gas leaks while working on the unit, venti-
late the room thoroughly right away.
•
The outdoor unit is charged with refrigerant.
•
Use copper alloy seamless pipes.
•
To prevent flare nut cracking and gas leaks, 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.
•
Refer to Table 2 for the dimensions of flare.
•
When making a flare connection, coat the flared inner sur
-
face only with ether oil or ester oil.
Then, turn the flare nut 3 to 4 times with your hand and
screw in the nut.
•
Refer to the Table 2 for tightening torque.
•
After inspecting pipe joints for gas leakage, be sure to insu-
late with the accessory joint insulation for fitting (3) (4) while
referring to the figure below.
(Fasten both ends with clamps (6).)
•
Wrap only the gas line side with the sealing pad (5). Bend
the pad over the insulation for fitting (union) from above.
Coat the flared inner surface
only with ether oil or ester oil
Torque wrench
Spanner
Piping union
Flare nut
Insulation for fitting
(accessory) (4)
(For liquid pipe)
Clamp (6)
(accessory)
Insulation for fitting
(accessory) (3)
(For gas pipe)
Sealing pad (accessory) (5)
(Wrapped over union)
Gas pipe
Liquid pipe
Fig. 1
Use “Table 3” as a reference if a torque wrench is not available.
Once work is complete, make sure there is no gas leaking. As
the flare nut is tightened with the wrench, the torque will sud
-
denly increase. From that position, tighten the nut to the angle
shown on “Table 3”.
•
Make absolutely sure to execute heat insulation works on
the pipe-connecting section after checking gas leakage
by thoroughly studying the following figure and using the
attached heat insulating materials for fitting (3) and (4).
(Fasten both ends with the clamps (6) (accessory).)
(Refer
to Fig. 1)
CAUTION
•
Be sure to insulate any field piping all the way to the piping
connection inside the unit. Any exposed piping may cause
condensate or burns if touched.
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