![background image](/i/gree/159317/gree-home-gmv/h/gree-home-gmv-193.png)
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)
Φ
6.35×0.5
≥
10
Φ
9.52×0.71
≥
10
Φ
12.7×1
≥
15
Φ
15.9×1
≥
15
Φ
19.05×1
≥
15
Φ
22.2×1.5
≥
20
Φ
25.4×1.5
≥
20
Φ
28.6×1.5
≥
20
Φ
34.9×1.5
≥
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.