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WT09050X01
9-7. Thermal insulation for pipes
Insulate pipes to prevent condensation.
- Condensation may collect and drip from the unit onto the ceiling or floor.
Insulate the high- and low-pressure pipes, and liquid and gas pipes separately with polyethylene foam insulation
materials. Inadequate insulation may cause condensation to drip. Pipes in the ceiling are especially vulnerable to
condensation and require adequate insulation.
9-7-1. Insulation material
・Check that the insulation materials meet the standards in the table below.
Between an outdoor unit and HBC controller
High-pressure pipe Low-pressure pipe
Thickness [mm (in)] Min. 10 (7/16) Min. 20 (13/16)
Heat resistance Min. 120°C (248°F)
Between an HBC controller and indoor unit
Refer to the HBC controller Installation Manual for details.
Ⓐ
Ⓑ
Ⓓ
Ⓔ
Ⓐ Steel wire
Ⓑ Pipe
Ⓒ Oily mastic asphalt or asphalt
Ⓓ Insulation material A
Ⓔ Outer covering B
Insulation
material A
Glass fiber + Steel wire
Adhesive + Heat-resistant polyethylene foam + Adhesive tape
Outer
covering B
Indoor Vinyl tape
Under the floor and exposed Waterproof hemp cloth + Bronze asphalt
Outdoor Waterproof hemp cloth + Zinc plate + Oily paint
* If a polyethylene cover is used as an outer covering, asphalt roofing is not necessary.
・Do not insulate the electric wires.
Ⓐ
Ⓒ
Ⓓ
Ⓔ
Ⓐ
Ⓑ
Ⓔ
Ⓓ
Ⓒ
Ⓐ High-pressure pipe or liquid pipe
Ⓑ Low-pressure pipe or gas pipe
Ⓒ Electric wire
Ⓓ Finishing tape
Ⓔ Insulation material
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