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10.2.4 Connecting Tubing between Indoor and
Outdoor Units
•
Tightly connect the indoor side refrigerant
tubing extended from the wall with the outdoor
side tubing. (Fig. 30)
•
To fasten the flare nuts, apply specified torque
as:
Table 2
10.2.5 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. The
thickness of the insulation should be a min. 8 mm.
(Fig. 31, 32)
After a tube has been insulated, never try to bend
it into a narrow curve, as this may cause to break
or crack.
10.2.6 Taping the Tubes
•
At this time, the 2 refrigerant tubes (and
electrical wire if codes permit) should be taped
together with armoring tape. The drain hose
may also be taped together as 1 bundle with
the tubing.
•
Wrap the armoring tape from the bottom of the
outdoor to the top of tubing where it enters the
wall. As you wrap the tubing, overlap half of
each previous tape turn. (Fig. 33)
•
Clamp tubing bundle to wall, using 1 clamp
approx. every 120cm.
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 bundle and drips
clear of the unit and the tubing.
10.2.7 Finish the Installation
After finishing insulating and taping over the
tubing, use sealing putty to seal off the hole in
the wall to prevent rain and draft from entering.
(Fig. 34) shows refrigerant tubing taped
separately from the drain hose.
Indoor unit
Outdoor unit
Spanner
Torque wrench
Fig.30
Insulation
Fig.31
Insulation
Min.
8 mm
Thickness:
min. 8 mm
Fig.32
Fig.33
Clamp
Insulated tubes
Apply putty here
Tubing
Fig.34
Tube Dia. Tightening Torque
Approx. 15 - 20 N.m (1.5 - 2.0 kg.m)
9.52 mm
6.35 mm
12.7 mm
Approx. 35 - 40 N.m (3.5 - 4.0 kg.m)
Approx. 50 - 55 N.m (5.0 - 5.5 kg.m)
CAUTION
IMPORTANT
NOTE
10. INSTALL OUTDOOR UNIT
Installation Service