Haier AW052MUCHA Installation Manual page 26

Installation instruction
Minimum flow rate
• Check that the water pump of the space heating circuit works within the pump operating range and that the water flow is
over the pump's minimum. If the water flow is below lower than the minimum water flow, alarm is displayed on the unit.
Model
AW052MUCHA
AW072MUCHA
AW092MUCHA
AW112MXCHA
AW142MXCHA
AW162MXCHA
AW11NMXCHA
AW14NMXCHA
AW16NMXCHA
Filter
• An additional special water filter is highly recommended to be installed on the space heating (field installation), in order
to remove possible particles remaining from brazing which cannot be removed by the unit water strainer. Water filter
need to be bought and installed by installer. Number of water filter meshes is not less than 40.
Expansion tank
• The internal air pressure of the expansion vessel tank will be adapted to the water volume of the final installation,there is
not expansion tank in the ODU,it should be buy and installed by installer.The Volume of the expansion tank is according
to the whole system.
DHW Tank
• When selecting a tank for DHW operation, take into consideration the following points:
The storage capacity of the tank has to meet with the daily consumption in order to avoid stagnation of water.
Fresh water must circulate inside the DHW tank water circuit at least one time per day during the first days after the
installation has been performed. Additionally, flush the system with fresh water when there is no consumption of DHW
during long periods of time.
Heat loss
• Try to avoid long runs of water piping between the tank and the ODU installation in order to decrease possible
temperature losses.
• When necessary, put insulation on the pipes in order to avoid heat losses. The thickness of insulation is not less than
30mm.
Piping
• The maximum water pressure is 5 bar (nominal opening pressure of the safety valve). Provide adequate reduction
pressure device in the water circuit to ensure that the maximum pressure is NOT exceeded.
• Make sure that all field supplied components installed in the piping circuit can withstand the water pressure and the
water temperature range in which the unit can operate.
• HAIER units are conceived for exclusive use in a closed water circuit.
Water flow rate
(Lmin)
14.3
20.1
25.8
31.5
40.1
45.9
31.5
40.1
45.9
20
Minimum water flow
(Lmin)
8.6
12.1
15.5
19.0
24.1
27.5
19.0
24.1
27.5