10
Insulation
3-7. 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 minimum 8 mm. (Fig. 16)
3-8. 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. 17a)
(3) Clamp the tubing bundle to the 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 bundle
and drips clear of the unit and the tubing.
3-9. 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. 17b)
NOTE
IMPORTANT
Indoor unit
Outdoor unit
Spanner
Torque wrench
Fig. 14
Fig. 15
Insulation
Min.
8 mm
Thickness:
min. 8 mm
Fig. 16
Fig. 17a
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Clamp
Insulated tubes
Apply putty here
Tubing
Fig. 17b
CAUTION
After a tube has been insulated,
never try to bend it into a narrow
curve, as this may cause the
tube to break or crack.
CAUTION
Be sure to match refrigerant
tubing and electric wiring
between indoor and outdoor
units. For more details, refer to
“Tubing Check Control” in the
Technical & Service Manual.
