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Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION

189

1）Connection of thermal insulation pipe

Carry out thermal insulation to the refrigerant pipe after confirming that it has no leakage.

Please perform thermal insulation to the refrigerant pipe according to the steps below

Check if the thermal insulation pipe has met the thickness requirements. If not, the condensing ◆

water is easy to attach on thermal insulation pipe and finally drips. The thickness requirements are

shown below:

Refrigerant Pipe (mm) (Outer Dia. x Thickness)

Thickness of Thermal Insulation

Materials (mm)

Φ6.35×0.5 ≥10

Φ9.52×0.71 ≥10

Φ12.7×1 ≥15

Φ15.9×1 ≥15

Φ19.05×1 ≥15

Φ22.2×1.5 ≥20

Φ25.4×1.5 ≥20

Φ28.6×1.5 ≥20

Φ34.9×1.5 ≥20

Wrap the refrigerant pipe according to required thickness. The clearance between thermal ◆

insulation pipes shall be sealed with self-adhesive sticker.

Wrap the thermal insulation pipes with tapes, thus to extend their ageing time. ◆

2）Thermal Insulation of Branch Pipe

Each branch pipe is provided with foam. Wrap the branch with the included foam. The upper and

lower foam shall be sealed with self-adhesive sticker. All the sections with or without foam shall be

wrapped by using thermal insulation pipe. The butt connection between foam and thermal

insulation pipe shall be sealed with self-adhesive sticker.

3）Cautions:

The thermal insulation materials shall be able to withstand the pipe temperature. For heat pump

unit, it is required to withstand a temperature not lower than 70 on liquid pipe side and not lower ℃

than 120 on gas pipe side. For cooling℃ -only unit, it is required to withstand a temperature not

lower than 70 on both liquid pipe side and gas pipe side. Example:℃ Heat resistant PVC foam

(over 120 ); Foam PVC (over 100 )℃℃

 The connector between indoor unit and outdoor unit shall be wrapped with thermal

insulation materials, and shall have no clearance to the wall on which the outdoor unit is

mounted, as shown below.