Gree HOME GMV [208/367] Hydro box

Gree HOME GMV [208/367] Hydro box
Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION
204
13 INSTALLATION OF WATER PIPELINE
13.1 Pipeline between Hydro-box and Water Tank
Preparation of Pipe: the PPR pipe with outer diameter dn25 which is S2.5 series (thickess is 4.2mm) is
recommended.Hot-water pipes are applied as feed pipe for cooling water and outflow piep for hot water. The PPR
pipe with outer diameter dn20 which is S2.5 series (thickess is 3.4mm) is recommended.All applied PPR pipes
must comply with national standards GB/T18742.If other insulated pipeline are adopted, the above can be
reference.
Installation of Circulating pipes: the water inlet of outdoor unit shall connect with outlet of circulating pipe of water
tank while the water outlet of outdoor unit shall connect with the inlet of water tank. The auto air outlet valve shall
be vertically installed upward in the water outlet of outdoor unit while the manual air outlet valve A shall be
vertically installed downward in the water inlet of outdoor unit. The manual air outlet valve B must be vertically
installed upward beside the inlet of circulating pipe of water tank.If the conditions are permitted, install the manual
air outlet valve B in the place which is convenient for users. The three air outlet valves above are randomly
equipped
Installation of Water Pipe of Water Tank: safety check valve,filter and cut-off valve must be installed in feed pipe
according to the installation diagram of the unit( pay attention to the direction of safety check valve: “→”on the
valve shall point at water tank). At least one cut-off valve shall be installed for outflow pipe.
Installation of Blowing Tube on the Bottom of the Water Tank: Connect the drain vent with the floor drain by PPR
pipe. A cut-off valve must be installed in the blowing tube.
After all pipelines have been installed, execute leak detection.If there is no leakage, execute insulation work to all
pipelines, especially to the valve and pipe joints. Insulating cotton whose thickness is not less than 15mm is
recommended. After wrapping the pipe with insulating cotton, bundle the pipe, water temp sensor and wires.
Installation Diagram of the Unit
air outlet valve
water temp sensor on the
lower part
drain vent
tap water
cut-off valve B
filter
safety check valve
hot water
outlet pipe
cut-off valve C
water tank
cut-off valve A
drain joint B
water temp sensor on the
upper part
connected
water inlet
water outlet
drain joint A
Hydro-box
temp sensor port 1
temp sensor port 2
Note:
1. Only temp sensor in the bottom part is equipped in hydro-box and the temp sensor in the upper part is
self-provided by water tank.
2. Connect temp sensor port 1 of water tank with the water temp sensor on the upper part of hydro-box.
3. Connect temp sensor port 2 of water tank with the water temp sensor on the lower part of hydro-box.
4. The connection method of upper temp sensor is mutual connection in the air.
5. If the water tank just has one temp sensor port, connect the temp sensor on the upper part of hydro-box with
temp sensor port of water tank.
Specification
Name Thread of Connecting Pipe
Circulating vents of hydro-box G3/4
Cooling water inlet of water tank G1/2
Circulating water inlet of water tank G3/4
hot water outlet of water tank G1/2
Pipe junction G3/4

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