18
English
5-4. Connecting Tubing between Indoor and
Outdoor Units
a) Tightly connect the indoor side refrigerant tubing
extended from the wall with the outdoor side tubing.
(Fig. 52)
b) To fasten the flare nuts, apply specified torque as:
Table 6
5-5. Insulation of Refrigerant Tubing
To prevent heat loss and wet floors due to dripping of
condensation,
both tubes must be well insulated
with a proper insulation material.
(Fig. 53)
The thickness of the insulation should be a minimum
8 mm. (Fig. 54)
5-6. Taping the Tubes
(1) At this time, the 2 refrigerant tubes (and electrical
wire if local codes permit) should be taped togeth-
er with armoring tape. The drain hose may also be
included and taped together as 1 bundle with the
tubing.
(2) Wrap the armoring tape from the bottom of the
outdoor unit to the top of the tubing where it enters
the wall. As you wrap the tubing, overlap half of
each previous tape turn. (Fig. 55)
(3) Clamp the tubing bundle to wall, using 1 clamp
approx. every 120 cm.
Do not wind the armoring tape too tightly, since this
will decrease the heat insulation effect. Also, be sure
the condensation drain hose splits away from the bun-
dle and drips clear of the unit and the tubing.
5-7. Finishing the Installation
After finishing insulating and taping over the tubing,
use sealing putty to seal off the hole in the wall to pre-
vent rain and draft from entering. (Fig. 56)
NOTE
IMPORTANT
Indoor unit
Outdoor unit
Spanner
Torque wrench
Fig. 52
Insulation
Min. 8 mm
Thickness: min. 8 mm
Fig. 54
Fig. 55
Clamp
Insulated tubes
Apply putty here
Tubing
Fig. 56
CAUTION
After a tube has been insu-
lated, never try to bend it
into a narrow curve, as this
may cause the tube to break
or crack.
Insulation
Fig. 53
Tube Dia.
Tightening Torque
6.35 mm
14 – 18 N·m (140 – 180 kgf · cm)
9.52 mm
34 – 42 N·m (340 – 420 kgf · cm)
12.70 mm
49 – 61 N·m (490 – 610 kgf · cm)
15.88 mm
68 – 82 N·m (680 – 820 kgf · cm)
06-154 MCAF186 - 246R5I ENG 3/15/06 11:04 AM Page 18
