Haier AW042MUGHA Installationsanleitung Seite 33

Installation Instruction
Do one of the following to protect the water circuit against freezing:
·
Add glycol to the water. Glycol lowers the freezing point of the water.
·
Install freeze protection valves. Freeze protection valves drain the water from the system before it can freeze. Insulate
the freeze protection valves in a similar way as the water piping, but do NOT Insulate the inlet and outlet (release) of
these valves.
• Additionally, in cases where water drainage is difficult, an anti freeze mixture of glycol (ethylene or propylene) should be
used (content between 10% to 40%). The performance of the unit working with glycol may decrease in proportion to the
percentage of glycol used, since the density of glycol is higher than that of the water.
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.
• If 08E error code occurs during the first-time installation or restart after an extended shutdown with no water in the
system, please refer to the Service Manual for 08E troubleshooting.
• If the system has not been used for an extended period, ensure that the system remains filled with water and that the
power stays on (the system owns anti freezing function during shutdown). In the event of a drainage requirement, it is
advised to replenish the water as soon as possible after the drainage process. Failure to do so might result in a potential
risk of the water pump's rotor getting locked. In the meanwhile, it is also advised to perform pipeline insulation and add
antifreeze after the system is replenished with full water to avoid pipeline break due to low ambient temperature.
Model
AW042MUGHA
AW062MUGHA
AW082MUGHA
AW102MUGHA
AW122MXGHA
AW142MXGHA
AW162MXGHA
AW10NMUGHA
AW12NMXGHA
AW14NMXGHA
AW16NMXGHA
Filter
• The type of filter that is recommended is the magnetic type. 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 pressure inside the expansion tank will be adjusted according to the final water volume. The ODU machine comes
with an expansion tank with an initial pressure of 1bar. For AW042/062/082/102MUGHA and AW10NMUGHA models,
4.5L expansion tank is configured. When the maximum outlet temperature is 80°C, the maximum closed system water
system capacity is 78L. For AW122/142/162MXGHA and AW12/14/16NMXGHA models, equipped with 8L expansion
tank, the maximum closed system water system capacity is 139L when the maximum outlet temperature is 80°C,;
If the maximum water volume of the system exceeds the maximum allowable water volume of the random standard
expansion tank, an additional expansion container is required.
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.
Nomal water flow rate (L/min)
11.5
17.2
22.9
28.7
34.4
40.1
45.9
28.7
34.4
40.1
45.9
26
Minimum water flow(L/min)
4.6
6.9
9.2
11.5
13.8
16.0
18.4
11.5
13.8
16.0
18.4