Gree HLR45SNa-M - Page 18

Household (Townhouse) Central Air Conditioning Unit
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2) Construction must be correctly designed and conducted according to the water and heat pipeline design
criteria and standard.
3) Select corresponding pipe diameter according to the given dimension of pipes.
4) here is expand can set in the unit, water ow switch, auto water lling valve, safety valve, and water
system adopts our Household (Townhouse) Unit standard installation sketch (as shown in the next page).
5) The proportion of electric 2-way valve and electric 3-way valve in water system should refer to
technical criteria (the recommended value is 2:1). And electric 3-way valve must be assembled at the furthest
end of water system.
6) Try to decrease the pressure difference between indoor fan coil or main host with water in or out port
of the unit.
7) Do install water lter at water-in pipe of the unit to prevent block at heat exchanger inside the unit.
8) After piping water system, according to relevant criteria for HVAC, conduct leakage test with hydraulic
pressure of 0.6MPa. and maintain the pressure for 24h. Ensure that there is no leakage in the whole pipeline
system, then wrap heat preservation layer.
9) After completed piping of water system, do drain out contamination inside water system. Ensure that
inside of water pipe is clean without contaminations such as rust dregs, so that there will be no blockage in
pipeline and sleeve heat exchanger in the unit and water pump, which will damage the unit.
10) Exhaust air inside water system with auto exhaust valve. Auto exhaust valve must be installed at the
highest point at water return pipe.
11) Drainage valve should be installed at the lowest point of water pipe.
12) hermometer and hydraulic pressure meter must be set at water-in and water-out pipe of unit for
convenient check when unit is operating.
13) Water pipe must conduct heat preservation and moisture proof, to prevent loss of cooling or heating
capacity and forming condensation water.
14) Inlet water pipe pressure must be lower than 0.62MPa. ,otherwise safety valve will open automatically
release pressure. At the same time ,its minimal pressure must be beyond 0.15MPa..
15) Cleaning and maintenance must be done by professionals.
Warning: Water filter with at least 60 meshes must be installed on water-in
pipeline system of the unit to avoid blocking the sleeve
heat exchanger
in the
unit and causing damage. Do clean it regularly. It must be down by professionals