Hydro-Pro 7018545, Service Manual

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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