Water Flow Setting; Winter Setting - Polytropic NEO INVERTER Manuel D'instructions

Water flow setting

To optimize the performance of the heating process, it is advisable to regulate the water flow through the pool heat
pump.
The adjustment must be carried out according to the indication given by the pressure gauge. The setting is modified by
opening or closing the setting valve of the by-pass.
To increase the pressure on the manometer (pressure gauge), the water flow passing through the heat pump must
decrease:
Open the setting valve.
To decrease the pressure on the manometer (pressure gauge), the water flow passing through the heat pump must
increase:
Close the setting valve.
For a normal working performance, inlet and outlet valves must be completely open.
Normal pressure
Pressure inside the refrigerant circuit of the heat pump and the water flow influence each other.
To work correctly, a water flow of 5 to 7 m³/h (100 l/min) should be maintained for maximum heat transfer.
Ideal by-pass setting is obtained when the manometer needle indicates (when working in heating boost Hi mode for
several minutes) a temperature between 10 to 15°C higher than the swimming pool water temperature.
Warning: The Heat pump needs to operate for few minutes before the internal pressure stabilizes
Example : Swimming pool water is at 20°C, heat pump is working for 5 minutes in heating boost (Hi) mode, and the
needle indicates 20 bars / 280 PSI / 32 °C / 90 °F.
→ 32°C – 20 °C = 12°C → by-pass setting is correct (between 10 and 15°C)
Abnormal pressure
If the pressure is too high or too low, it indicates that the water flow circulating inside the heat pump is not correct.
You need to adjust the water flow by opening or closing the by-pass valve. Open little by little it if the pressure is too low
and close it little by little if the pressure is too high until it remains stable in the correct area.
When heat pump is stopped the temperature indicated by the needle should be close to water temperature.
If the value is 0, don't start the machine (contact your seller).
Frequency of settings
The optimum water flow through the pool heat pump depends mainly on the water temperature and to a lesser extent
on the ambient air temperature.
Ideally the settings should be done:
•
When the pool heat pump is turned on and water is cold.
•
When the pool temperature is increasing.
•
When the desired water temperature is reached.
Thereafter the flow does not need to be regulated any further. Simply check the pressure once in a while to ensure that
the pool heat pump is working normally and that the water flow hasn't changed.

Winter setting

When you are winterizing your pool system, you must:
•
Turn the pool heat pump off
•
Close downstream and upstream valves of the by-pass system.
•
Drain the exchanger to prevent any risk of freezing.
•
Open completely the downstream and upstream valves to empty the heat exchanger tank before closing them.
•
Cover the heat pump with a water-proof cover.
A special cover designed for each heat pump model can be provided as an option.
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