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Translation from original instructions
7.2 First starting
When the unit is started for the first time, some important tests and checks must be done.
7.2.1 Hydraulic tests
So that the unit can operate, the external OK signal device must be closed (refer to the wiring diagram provided with the
unit).
The external OK signal input must be short-circuited if not needed for system requirements.
Water circulation can be managed by the control of the unit or by a control outside the unit.
If water circulation is controlled by an external control, the pump must be started before the unit starts and
stopped after the unit stops.
We advise an advance on starting and a delay on stopping of at least 5 minutes.
Before starting the unit, make sure the system has been bled correctly.
Before starting the unit, make sure the pump has been bled to prevent damage to the hydraulic seals.
For units equipped with pump unit, check that the pumps controlled with direct starting are rotating in the
correct direction.
7.2.2 Start
Start the unit by acting on the user interface of the control.
Check that the water flow switch/differential pressure switch is working correctly by closing the shut-off valve at the outlet of
the unit; this should cause the alarm to be displayed on the user interface of the unit.
If not, restore correct operation.
Reopen the valve, reset the alarm and restart the unit.
For units equipped with pump unit, if the pump is noisy, close the delivery valve until normal operation has been restored.
This can occur when the head loss of the system differs considerably from the discharge head of the pump.
If there is a water leak on first start-up, it could be a problem with bedding in of the mechanical seal. We
therefore advise pressurizing the pump body 2 or 3 times by closing and opening the delivery valve so as to
correctly bed in the seal.
If this operation does not solve the problem, contact the technical support department.
