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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 (see table below).
For horizontal models (Hydro Pro 5, 7, 10 and 13): remove the top panel.
For vertical models (Hydro-Pro 18, 22, 22T and 26T): remove front panel.
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.
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
17


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