Manual Hydro-Pro Inverter 07 (page 17 of 186) (English, German, Dutch, Danish, French, Polish)

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Note: This arrangement is only an illustrative example.

3.6 Adjusting the bypass

Optimal operation of the heat pump occurs when the cooling gas pressure is 22



2 bar.

This pressure can be read on the pressure gauge next to the control heat pump panel. Under these conditions the

water flow through the unit is also optimal.

Note: Operation without a bypass or with improper bypass adjustment may result in sub-optimal heat pump

operation and possibly damage to the heat pump, which renders the warranty null and void.

3.7 Electrical connection

Note: Although the heat pump is electrically isolated from the rest of the swimming pool system, this only

prevents the flow of electrical current to or from the water in the pool. Earthing is still required for protection

against short-circuits inside the unit. Always provide a good earth connection.

Before connecting the unit, verify that the supply voltage matches the operating voltage of the heat pump.

It is recommended to connect the heat pump to a circuit with its own fuse or circuit breaker (slow type; curve D)

and to use adequate wiring.

Connect the electrical wires to the terminal block marked ‘ POWER SUPPLY ’.

A second terminal block marked ‘WATER PUMP ’ is located next to the first one. The filter pump (max. 5 A / 240 V)

can be connected to the second terminal block here. This allows the filter pump operation to be controlled by the

heat pump.

Note: In the case of three-phase models, swapping two phases may cause the electric motors to run in the reverse

direction, which can lead to damage. For this reason, the unit has a built-in protective device that breaks the circuit

if the connection is not correct. If the red LED above this safety device lights up, you must swap the connections of

two of the phase wires.

3.8 Initial operation

Note: In order to heat the water in the pool (or hot tub), the filter pump must be running to cause the water to

circulate through the heat pump. The heat pump will not start up if the water is not circulating.

After all connections have been made and checked, carry out the following procedure:

1. Switch on the filter pump. Check for leaks and verify that water is flowing from and to the swimming pool.

Out In

Heat Pump

Use the following procedure to adjust

the bypass:



fully open all three valves

 slowly close valve 1 until the

water pressure is increased by

approximately 100 to 200 g

 Close valve 3 approximately

half-way to adjust the gas

pressure in the cooling system

 If the display shows "ON" or

error code EE3, close step by

step the valve 2, to increase

water flow and stop when the

code disappear.

To pool

From pool

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Hydro-Pro Inverter 07 Manual

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