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8
English
5-2
Install the indoor unit. (Refer to Fig. 18)
• Lock the unit to the hangers on side A.
• Hook the unit onto the other 2 hangers and lock with bottom
washers and nuts.
5-3
Check whether the unit is level from sides C
and D both. (Refer to Fig. 19)
5-4
Remove the washer fixing plate (5) used for
preventing the washer from falling and tighten
the upper nut.
CAUTION
•
Do not hold the swing flap when mounting, as this may
break it.
• The indoor unit is equipped with a built-in drain pump and
float switch. At each of the unit’s 4 corners, verify that it is
level by using a water level or a waterfilled vinyl tube.
(If the unit is tilted against condensate flow, the float switch
may malfunction and cause water to drip.)
6.
REFRIGERANT PIPING WORK
〈
For refrigerant piping of outdoor and BEV units, see the
installation manual attached to the outdoor and BEV units.
〉
〈
Execute heat insulation work completely on both sides of
the gas piping and the liquid piping.
Otherwise, a water leakage can result sometimes.
〉
〈
When using a heat pump, the temperature of the gas pip-
ing can reach up to approximately 120°C, so use insulation
which is sufficiently resistant.
〉
〈
Improve the insulation on the refrigerant piping depend-
ing on the installation environment.
If the insulation is not sufficient, condensation may form
on the surface of the insulation.
〉
〈
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.
〉
CAUTION
•
Use a pipe cutter and flare suitable for the type of refrig-
erant.
• Apply ester oil or ether oil around the flare section
before connecting.
• To prevent dust, moisture or other foreign matter from
infiltrating the tube, either pinch the end or cover it with
tape.
•
Do not allow anything other than the designated refrig-
erant 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.
6-1
Refrigerant piping can be run in 3 directions
(Refer to Fig. 20)
• Use copper alloy seamless piping (ISO 1337).
• The outdoor unit is charged with refrigerant.
• Be sure to use both a spanner and torque wrench together,
when connecting or disconnecting piping to/from the unit.
(Refer to Fig. 21)
• Refer to the Table 2 for flare dimensions and tightening torque.
NOTE
• Use the flare nut included with the unit main body.
CAUTION
• Over-tightening the flare nut may break it and/or cause the
refrigerant to leak.
• When connecting the flare nut,
apply ester oil or ether oil to
the flare section (both inside
and outside), and spin 3-4
times before screwing in.
(Refer to Fig. 22 )
A
B
D
C
Piping area
Insert below
washer.
Washer fixing plate (5)
(accessory)
Securing the washer
Fig. 17
Hanger bracket
Tighten
(double nuts.)
Fig. 18
Washers for locking
hanger (3) (accessory)
Nut (Field supplied)
Piping area
Level
A
B
C
D
Level check
Fig. 19
Upward running piping
Rearward running piping
Rightward running piping
Fig. 20
Torque wrench
Spanner
Piping union
Flare nut
Fig. 21
Ester oil or ether oil
Fig. 22
01_EN_3P086156-10X.fm Page 8 Wednesday, April 15, 2009 3:48 PM