10
English
(6) Push on both bottom edges of the indoor unit using both hands and hook the tab on the back of
the indoor unit onto the installation panel (1). (Refer to Fig. 10)
•
At this time remove the buffering material placed in step (3).
•
Make sure wiring the units, earth wiring and remote controller wiring are not caught inside the indoor unit.
When screwing in the indoor unit
•
Remove the front grille.
(Refer to Fig. 8)
•
Secure the indoor unit to the installation panel (1) with the
securing screws (5).
(Refer to Fig. 12)
6. REFRIGERANT PIPING WORK
〈
For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.
〉
〈
Make sure to carry out thermal insulation in both gas and liquid piping. Incomplete insulation may
result in water leakage. Thermal resistance of the insulation for gas piping must be 120°C or higher.
In a high humidity environment, strengthen the refrigerant piping insulation. If insulation is insuffi-
cient, condensation may form on the insulation surface.
Be sure to check that the refrigerant is R410A before starting the job. (If a different refrigerant is used,
a normal operation cannot be carried out.)
〉
CAUTION
This product is a dedicated model for new refrigerant (R410A). At installation, make sure to observe
the following precaution.
• For flare connection, use dedicated pipe cutter and flaring tools for R410A.
• Apply ester oil or ether oil to the inside of the flare section before connecting.
• Use the flare nuts provided with the unit. Do not use a class 1 flare nut.
Otherwise the refrigerant may leak.
• To prevent dust, moisture or other foreign matters from getting into the tube, either pinch the
tube end or cover the end 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, ventilate the room
thoroughly right away.
•
The outdoor unit is charged with refrigerant.
•
Be sure to use both a spanner and a torque wrench together as shown
in the drawing, when connecting or disconnecting pipes to/from the
unit.
(Refer to Fig. 13)
•
Refer to “Table 2” for the dimensions for flaring.
•
When connecting the flare nut, apply ester oil or ether oil to the inside
of flared section, and turn the nut spin 3-4 times by hand before screw-
ing in.
(Refer to Fig. 14)
CAUTION
•
Be careful not to damage the flare section.
Installation panel (1)
(accessory)
Refrigerant piping
Insulating tape (3)
(accessory)
(2 places for 71 class.
3 places for 100 class.)
M4 × 12L
(accessory) (5)
Drain hose
Fig. 12
Torque wrench
Spanner
Piping union
Flare nut
Fig. 13
Fig. 14
Apply ester or ether oil
to this face.
3P184443-9J_FM6.book Page 10 Wednesday, December 14, 2011 10:29 AM
