Connection Requirements Of Hydro Box And Water Tank; Installation Requirements Of Water System; Capacity Setting Of Water Tank - Gree GMV-S120WL/A-S Service Manual

the system from freezing.

11.2 Connection Requirements of Hydro box and water Tank

Connect hydrobox with water tank by water pipe which can be galvanized pipe or seamless
steel pipe, like PVC pipe, PPR pipe, etc.
Circulating water inlet/outlet of
Cold water inlet of water tank
Circulating water inlet/outlet of
Hot water outlet of water tank
Note:
The circulating water pipe shall be insulated with insulating material whose thickness is not
less than 15mm.
The circulating water pipe shall be sealed to prevent water leakage.

11.3 Installation Requirements of Water System

(1) The cold water inlet of pressure water tank shall be connected to tap water pipe, and the
hot water outlet shall be connected to the water terminal.
(2) The tap water inlet shall be connected with one-way valve, filter and relief valve.
(3) For easy repair, manual cutoff valve shall be installed at water inlet or outlet.
(4) Exhaust valve shall be installed at the highest position of water pipe.
(5) To avoid waiting too long when using hot water, please add hot water return line if the
water terminals are dispersed and the water tank is far from such terminals.
(6) If possible, please equip an expansion tank. Generally, the size of expansion tank shall be
5～10% of the size of the whole water system.

11.4 Capacity Setting of Water Tank

The ex-factory defaulted capacity of water tank is 300L. If the actually installed water tank
capacity is smaller than 300L, setting is not needed. If the actually installed water tank capacity is
bigger than 300L, please arrange the following setting.
GMV5 Home DC Inverter Multi VRF Units
Size of interface
Name
hydro box
water tank
Pipe joint
Screw of joint
G1A
G1/2
G3/4
G1/2
G3/4
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