Gree HOME GMV [209/367] Connecting pipe between outdoor unit and hydro box

Gree HOME GMV [209/367] Connecting pipe between outdoor unit and hydro box
Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION
205
Caution:
1. The parts of actual line and imaginary line ( except ground wire)of water tank with electric auxiliary heater shall
be installed and connected. But only the part of actual line of water tank without electric auxiliary hearter need to
be installed and connected.The difference between these two kinds of tanks can be recognized from their models
and please refer to the explaination of water tank model.
2. Horizontal distance between water heater and water tank shall be within 5m and drop height shall be not exceed
3m. If such values are exceeds their specified range, please contact with us. The recommended installaion method
is that the water tank is installed on the bottom while the water heater is on the top.
3. Please prepare materials according to the specifications above, PPR pipe is recommended if the cut-off valve is
installed outside.
4. Only when the water heater has been fixed, the water pipeling can be installed. Keep the dust and other things
away from the piping system.
5. Dependening on the pressure of tap water, water tank can provide hot water. Therefore, tap water is essential
for using hot water.
6. Keep the cut-off valve of inlet of water tank open when using it.
13.2 Connecting Pipe between Outdoor Unit and Hydro-box
Connect outdoor unit with hydro-box by refrigerants piping
Model
Refrigerants
Pipe
Diameter (mm) Length dm Connection way
RQD5GA-K
RQD8GA-K
Gas pipe 15.9 10 Negative Delta
Liquid pipe 12.7 10 Negative Delta
RQ20LA-K
RQ30LA-K
RQD20LA-M
RQD30LA-M
Gas pipe 19.05 10 Negative Delta
Liquid pipe 15.9 10 Negative Delta
13.3 Connection Requirements of Hydro-box and Water Tank
Connect hydro-box with water tank by water pipe which can be galvanized pipe or seamless steel pipe,like
PVC pipe, PPR pipe, etc.
Circulating
Pipe
Joint Sizein
Vertical Heightd
m
Connection Method
Inlet Pipe 3/4" 3 Threaded Connection
Outlet Pipe 3/4" 3 Threaded Connection
If the vertical height is more than 5m, please contact us.
Execute insulation work to circulating tube and the thickness of heat insulating material shall be not less than
10mm.
Each joint of circulating tube shall be completely sealed.
13.4 Installation Requirements of Water Pipeline
Cooling water inlet of water tank connects tap water pipe and hot water outlet connects the terminal water
outlet.
One-way valve, filter and pressure relief valve shall be installed in the inlet of tap water.
Manual cut-off valve shall be installed in water inlet or outlet for conveniency of servicing.
Air outlet valve shall be installed on the highest position of the water pipe.
If there are a few of terminal water outlets which are also far away from the water tank, please add return water
pipe to prevent users from waiting long for hot water.

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