Gree GMV series User Manual

GMV DC Inverter VRF
9
3.3 Piping Work Requirements
There should be no fall among outdoor modules. Refer to the table below for piping work
requirements.
R410A Refrigerant System
Outer Diameter mm(in.)
Wall Thickness mm(in.)
Type
Φ6.35(1/4)
≥0.8(1/32)
O
Φ9.52(3/8)
≥0.8(1/32)
O
Φ12.7(1/2)
≥0.8(1/32)
O
Φ15.9(5/8)
≥1.0(3/76)
O
Φ19.05(3/4)
≥1.0(3/76)
1/2H
Φ22.2(7/8)
≥1.2(1/21)
1/2H
Φ28.6(1-1/8)
≥1.2(1/21)
1/2H
Φ34.9(1-3/8)
≥1.3(2/39)
1/2H
Φ41.3(1-5/8)
≥1.5(1/17)
1/2H
4 Installation Instruction
4.1 ODU Foundation
The concrete foundation of the ODU must be strong enough. Ensure that the drainage is
smooth and that the ground drainage or floor drainage is not affected.
Requirements on the concrete foundation are as follows:
A. The concrete foundation must be flat and have enough rigidity and strength to undertake
the unit’s weight during running. The height of the foundation is 200 mm(7-7/8 in.) to 300
mm(11-13/16 in.), which is determined based on the size of the unit.
B. Build a drainage ditch around the foundation to discharge the condensate water.
C. If the air conditioner is installed on the roof, check the intensity of the building and take
waterproof measures.
D. If a u-steel foundation is adopted, the structure must be designed with sufficient rigidity
and strength.
Fig. 14

Gree GMV series Specifications

General

Type	Variable Refrigerant Flow (VRF)
Compressor Type	Inverter Scroll Compressor
Refrigerant	R410A
Energy Efficiency	High Efficiency
Control	Centralized control, individual control
Operating Temperature Range (Heating)	24°C
Noise Level (Indoor Unit)	19 - 45 dB(A)