only after passing through all the radiators in a loop it is taken to the boiler, the
most economic setting is the lower setting from PP
2
proportional-pressure curve.
Optionally, a higher setting from PP
1
proportional-pressure curve can also be
selected.
3) The optimum choice for under floor heating is AUTO or optionally a higher
CP
1
or a lower CP
2
constant-pressure curve setting.
NIGHT MODE:
The night mode operating setting can only be used in the following instances:
- The central heating installation and the boiler must be equipped with an
automatic regulator of the heating medium temperature which must
operate in night mode.
- The pump must be installed on the pipe coming out of the boiler. The
night mode does not work when the pump is installed on the return pipe.
- Central heating installations with a small volume of the heating medium
cannot work with a pump operating in night mode.
NIGHT MODE operating principles:
The selection of the night mode will set the pump to detect temperature changes
of the flowing water. If the temperature sensor detects a decrease in temperature
by at least 0.1
O
C/min during a period of approx. 2 hours, the pump will
automatically start operating in night mode. If the temperature of the heating
medium increases by approx. 10
O
C, the pump will automatically return to the
standard operating mode.
The night mode setting will not work if the pump is running in one of its
constant speeds. Disconnecting the electricity supply will deactivate the night
mode. Once the power supply is reconnected, the night mode needs to be
switched on again, using the appropriate switch.
START-UP, OPERATION:
Once the installation is filled up with water, the pump can be started-up.
CAUTION The installation needs to be leaktight as the pump must not be
exposed to leaking pipework. If water enters the internal elements of the pump,
the equipment will become damaged. This type of equipment damage is not
covered by the warranty and any repairs will have to be paid for. On the first
start-up, the pump should be vented using a metal plug located centrally on the
rating plate. The venting process is carried out with the pump running at a
constant speed with the plug removed, for a short period of time. A vented pump
is characterised by a lower noise level generated by the motor.
CAUTION The pump must not be used to purge the central heating
system of air! The vent valve installed above the pump should be used
for this purpose.
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