45
Insulating tape
(supplied)
Different-diameter-tube joint
Flare insulator (supplied)
Insulating tape
(supplied)
Tube insulator (not supplied)
Heat resistant 120°C or above
Flare union
Flare nut
Unit side
* Illustration shows when using by S-60MU2E5BN, S-73MU2E5BN or S-90MU2E5BN. (Only LZ2 series)
Insulation material
The material used for insulation must have good insulation characteristics, be easy to use, be
age resistant, and must not easily absorb moisture.
N OT E
If noise bothers you from the area between indoor and outdoor units’ connection pipes, it is
effective to wind the soundproofing materials (field supply) to reduce noise.
CAUTION
After a tube has been insulated, never try to bend it into a narrow curve because it can
cause the tube to break or crack.
Never grasp the drain or refrigerant connecting outlets when moving the unit.
5-4. Taping the Tubes
(1) At this time, the refrigerant tubes (and
electrical wiring if local codes permit) should
be taped together with armoring tape in
1 bundle. To prevent condensation from
overflowing the drain pan, keep the drain hose
separate from the refrigerant 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.
(3) Clamp the tubing bundle to the wall, using 1
clamp approx. each meter.
(4) Limited to Oceania only :
Interconnecting refrigerant pipework, i.e. pipework external to the unitary
components, should be marked with a Class label (see right figure) every two
metres where the pipework is visible.
Label size is 50 mm × 50 mm.
This includes pipework located in a ceiling space or any void which a person may access
for maintenance or repair work within that space.
N OT E
Do not wind the armoring tape too tightly since this will decrease the heat insulation effect. Also
ensure that the condensation drain hose splits away from the bundle and drips clear of the unit
and the tubing.
Insulated tubes Drain hose
Clamp
01_350115_EU_Eng.indb 45
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