Maintenance Of The Water Tank - Gree GRS-CQ4.0Pd/NhG3-E Owner's Manual

MONOBLOC TYPE
Installation Mode 2 of the Tap Water Valve (Inlet Water Pressure<0.1MPa)
The safety valve is bypass installed in the installation mode 2. A check valve is required at the tap water pipe
and installed horizontally with the valve cap vertically upwards and the arrow direction at the valve body the same
as the water flow.
Installation Mode 3 of the Tap Water Safety Valve (Inlet Water Pressure>0.5MPa)
A pressure maintaining valve is required in the installation mode 3 to make sure the water tank pressure keep
within 0.3~0.5MPa. The arrow direction of the pressure maintaining valve should be the same as the water flow.
Note: the filter, safety valve, check valve, pressure maintaining valve, cut-off valve and hose for installation are
not delivered with the main unit and should be prepared by the client.

19.5 Maintenance of the water tank

19.5.1 Water input and drainage of water tank
(1) Operation process for water input on the water tank
Cut off the power supply and open the cut-off valve at the water inlet of the tap faucet;
•
Open the cut-off valve at the hot water drain outlet and valve in user water use site;
•
Close the valve in user water use site when water is flowing out from user water use site;
•
Complete water input operation and reenergize the unit.
•
(2) Operation process for drainage on the water tank
Cut off the power supply and close the cut-off valve at the water outlet of the tap faucet;
•
Open the cut-off valve at the hot water drain outlet and valve in user water use site;
•
Open the cut-off valve on the joint (3-way) pipe;
•
Close the drainage cut-off valve after draining water on the water tank to complete drainage operation.
•
19.5.2 Periodic cleaning for water tank
Please clean the water tank periodically to get good-quality water according to the following steps:
(1) Cut off the power supply.
(2) Close the cut-off valve at the water inlet of the water tank.
(3) Open the cut-off valve at the hot water drain outlet and valve in user water use site.
(4) Open the cut-off valve in joint (3-way) connector, and wait for drainage of water inside water tank.
(5) Close the cut-off valve in joint (3-way) connector, open the cut-off valve at the water inlet of the water tank,
close the cut-off valve at the water inlet when water flows from user water use site, then reopen the cut-
off valve in joint (3-way) connector, repeat the drainage operation, close the cut-off valve in joint (3-way)
connector when water discharged is clean.
①
②
③
① Safety valve
② Check valve
③ Filter
Drainage
①
②
③
① Safety valve
② Regulator
③ Filter
Drainage
53
Air-to-water Heat Pump