Ÿ
Poor quality water will produce more scale and sand, this kind should be filtered
before putting through the heat pumps.
The demand quality of water
Ÿ
The acceptable water quality standard is shown in below table.
The water quality should be analyzed before system running,
to measure the pH value, conductivity, Chloride ion
concentration and sulphate ion concentration.
WARNING
7
Ÿ
The non-return valve is recommended for each unit to prevent the water back flow.
Ÿ
The system can be combined with multiple units, but should be controlled
independently.
Ÿ
Regarding the installation of backup pump, maintenance valve and temperature
measuring point, a separate design may be considered if necessary.
Ÿ
All pipes and valves of the unit must have heat insulation.
The swimming pool heat pump uses titanium heat ex-changer
and may be connected to the swimming pool directly. A water
ltration unit must be installed before water goes into the heat
pump, minimum size about 40mic.
WARNING
Ÿ
The circulation pump should be correctly sized to pump water through the pool
circulation and filtration system.
Selection of the water pump
4.4 Installation of Water Pump and Flow Switch
When the heat pumps are connected in multiples pump head is
subjected to the worst working condition loop.
NOTE
pH Value
Total Hardness
Conductivity
Chlorine Ion
Ammonia Ion
7~8.5
Sulphate Ion
<50ppm
<50ppm
Silicon
<50ppm
0
<200V/cm(25 C)
Iron Content
<0.3ppm
<50ppm
Ca
<50ppm
None
The flow switch is provided together with the heat pump and meets the following criteria;
Ÿ
The temperature of fluid should be between 0 and120 °C , max working pressure of
13.5 bar.
Ÿ
The flow switch can be installed on the horizontal pipeline or the vertical pipeline with
the water flow direction upward, it should not be installed on the vertical pipeline
which the water flow is downward.
Flow switch
