AUX ACHP-H04/4R3HA, Техническое и сервисное руководство

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R32 Split Type - Air Source Heat Pump 20220105
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In critical processes or in rooms with a high heat load though, extra water might be required.
3.3 Water Circuit Connection
Water connections must be made correctly in accordance with the labels on the hydronic box, with respect
to the water inlet and water outlet. If air, moisture or dust gets in the water circuit, problems may occur.
Therefore, always take into account the following when connecting the water circuit:
Use clean pipes only.
Hold the pipe end downwards when removing burrs
Cover the pipe end when inserting it through a wall to prevent dust and dirt entering.
Use a good thread sealant for sealing the connections. The sealing must be able to withstand the pressures
and temperatures of the system.
When using noncopper metallic piping, be sure to insulate the two kinds of materials from each other to prevent
galvanic corrosion.
For copper is a soft material, use appropriate tools for connecting the water circuit. Inappropriate tools will
cause damage to the pipes
3.4 Water Circuit Antifreeze Protection
Ice formation can cause damage to the hydronic system. All internal hydronic parts are insulated to reduce
heat loss. Insulation must also be added to the field piping.
The software contains special functions using the heat pump to protect the entire system against freezing.
When the temperature of the water flow in the system drops to a certain value, the unit will heat the water, either
using the heat pump, the electric heating tap, or the backup heater. The freeze protection function will turn off
only when the temperature increases to a certain value.
In event of a power failure, the above features would not protect the unit from freezing.
Since a power failure could happen when the unit is unattended, the supplier recommends use antifreeze fluid to
the water system.
Depending on the expected lowest outdoor temperature, make sure the water system is filled with a
concentration of glycol as mentioned in the table below. When glycol is added to the system, the performance of
the unit will be affected. The correction factor of the unit capacity, flow rate and pressure drop of the system is
listed in the table
Ethylene Glycol
Concentration of
ethylene glycol (%)
Modification coefficient
Freezing point (C)
Cooling capacity Power input Water resistance Water flow
0 1.000 1.000 1.000 1.000 0
10 0.984 0.998 1.118 1.019 -4
20 0.973 0.995 1.268 1.051 -9
30 0.965 0.992 1.482 1.092 -16
40 0.960 0.989 1.791 1.145 -23
50 0.950 0.983 2.100 1.200 -37