Gree Ultra Heat GMV-VQ72W/A-F, Руководство по обслуживанию

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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION
60
c. The drain pump shall be fixed securely. Otherwise, abnormal noises will be generated.
2.5 Requirements on Independent Drainage for Each IDU
Requirements on independent drainage design for each IDU are as follows:
(1) There must be a proper inclination for the drain pipe.
(2) The drain pipe must be installed to facilitate drainage to the largest extent and be as short as
possible.
(3) If the water is discharged to the outdoor side, it cannot drop to the outdoor ground directly.
2.6 Requirements on Centralized Drainage for IDUs
(1) When there are multiple IDUs in the same building, centralized drainage is adopted.
(2) When a header pipe is used, the drain pipe of each IDU must be higher than the header pipe.
(3) The diameter of the header pipe must be determined on the number and capacity of IDUs.
(4) When installing pipe, start from the highest point of the pipe and follow the specified inclination
to smoothly discharge condensate water.
(5) Connect branches to the main pipe from the upper part or side instead of lower part of the main
pipe.
(6) Insulate all condensate water pipes, especially for joints at elbows.
3 INSULATION SYSTEM
3.1 Insulation for the Refrigerant Pipe System
3.1.1 Insulation materials
Use closed-cell foam insulation materials with flame retardant grade of B1.
The heat conductivity is not greater than 0.035 w/(m·k) when the average temperature is 0°C.
3.1.2 Thickness of the insulation layer
External Diameter of the Pipe
mm
≤ 12.7 ≥ 15.9
inch 1/2 5/8
Thickness of the Insulation Layer
mm
≥ 15 ≥ 20
inch 0.59 0.79
Usesunblock, anti-weathering, and non-cracking insulation materials for outdoor pipes.