Haier AW042MUGHA Installationsanleitung Seite 34

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Installation Instruction

• The maximum water pressure is 3 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.

Minimum water volume description

The following part shows how to calculate the minimum water volume in the system for product protection (anti-hunting)

and temperature drop at defrosting.

1 Protective water volume for product

Ensure that the water volume is equal or greater than those shown below, in order to lower ON/OFF frequency of HAIER

unit at no load or extreme light load. When water volume is less than the volume indicated (minimum water volume),

compressor operation frequently stops at light load, which should result in shorter life or failure.

Minimum water

Minimum water

The hydraulic system should be equipped with air purgers at the highest locations of the system. Without them, air might

be trapped inside the water pipes and cause system malfunction. In this case, install all the additional air purgers (not

supplied with the product) needed in the hydraulic circuit to ensure no air enters. The installed position of the air purger

should be as below:

• For the heating floor system, the air should be purged by means of an external pump to avoid airbags.

Inlet/Outlet(inch)