Thermal Insulation For Pipes - Mitsubishi CITY MULTI PUHY-P-YKB-A1 Serie Manual De Instalación

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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 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

9-7-1. Insulation material

・Check that the insulation materials meet the standards in the table below.

Thickness [mm (in)]

Heat resistance

* The insulation thickness may need to be increased in high-temperature/humidity conditions.

* Even when specifications are defined by your client, the standards in the table should be met.

Glass fiber + Steel wire

Adhesive + Heat-resistant polyethylene foam + Adhesive tape

Under the floor and exposed

* If a polyethylene cover is used as an outer covering, asphalt roofing is not necessary.

・Do not insulate the electric wires.

・Make sure that the pipe connections all the way from the indoor unit are properly insulated.

Pipe size [mm (in)]

ø6.35 (ø1/4)–ø25.4 (ø1)

Min. 10 (7/16)

Min. 120°C (248°F)

Oily mastic asphalt or asphalt

Insulation material A

Outer covering B

Waterproof hemp cloth + Bronze asphalt

Waterproof hemp cloth + Zinc plate + Oily paint

Electric wire

Finishing tape

Insulation material

ø28.58 (ø1-1/8)–ø41.28 (ø1–5/8)

Min. 15 (5/8)

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