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5-3. Insulating the Refrigerant Tubing
Unless the insulation is made, condensation can cause damage to the interior of a property.
Use the supplied insulation material.
Wrap the tubing so that the fold of insulation
material can be facing upward.
Refrigerant tubing
toward indoor unit
Flare insulator (supplied)
200 mm × 200 mm
(Only Type 45, 56, 73,106)
Bottom
Top
Indoor unit
Illustration shows when using by S-73MK2E5B. (Only LZ2 series)
Flare insulator (supplied)
200 mm × 200 mm
Flare insulator (supplied)
100 mm × 160 mm
Wrap the tubing so that the fold of insulation material
can be facing upward.
Different-diameter-tube joint (supplied)
Tubing Insulation
Must ensure that pipe-work shall be protected from physical damage.
●
Thermal insulation must be applied to all units tubing,
including distribution joint (field supply).
* For gas tubing, the insulation material must be heat
resistant to 120°C or above. For other tubing, it must be
heat resistant to 80°C or above.
Insulation material thickness must be 10 mm or greater.
If the conditions inside the ceiling exceed DB 30°C and RH 70%, increase the thickness of
the gas tubing insulation material by 1 step.
CAUTION
If the exterior of the outdoor unit valves has been finished with a square duct covering,
make sure you allow sufficient space to access the valves and to allow the panels to be
attached and removed.
Additional Precautions For R32 Models
Ensure to do the re-flaring of pipes before connecting to units to avoid leaking.
To prevent the ingress of moisture into the joint which could have the potential to freeze and
then cause leakage, the joint must be sealed with suitable silicone and insulation material. The
joint should be sealed on both liquid and gas side.
Insulation material and silicone sealant. Please ensure there are no
gaps where moisture can enter the joint.
Silicone Sealant must be neutral cure and ammonia free. Use of silicone containing ammonia
can lead to stress corrosion on the joint and cause leakage.
Two tubes arranged together
Liquid tube
Insulation
Gas tube
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