Grundfos Conlift1 Installation Und Betriebsanleitung Seite 9

4. Applications
The Conlift is designed for the pumping of
condensate from the following:
• boilers
• air-conditioning systems
• cooling and refrigeration systems
• air dehumidifiers
• evaporators.
The Conlift is suitable for the pumping of condensate
which is collected below sewer level or which cannot
flow to the sewage system or drain of the building by
means of a natural downward slope.
Warning
Condensates from boilers are
aggressive as they contain acid.
Warning
Treat (possibly neutralise) condensate
from boilers according to local
regulations before it is led out into the
sewage system.
Warning
The Conlift must not be used for
flammable liquids.
Warning
The Conlift must not be installed in
potentially explosive environments.
The Conlift can pump condensates not requiring
neutralisation, i.e. with pH values of 2.5 or higher.
Condensates with pH values up to 2.5 should be
neutralised before they leave the Conlift.
Boilers fired with the following fuels normally supply
condensate with pH values up to 2.5:
• gas
• liquid gas
• low-sulphur fuel oil according to DIN 51603-1.
Irrespective of the capability of the Conlift, local
regulations may require the installation of a
neutralisation unit, even for pH values of 2.5 or
higher.
5. Function
The condensate runs by natural fall through a hose
into the tank. See section 7. Installation.
The liquid level in the tank is controlled automatically
by a float switch. A micro switch in the float switch
will start the pump when the liquid level reaches the
start level, and it will stop the pump again when the
liquid level has fallen to stop level. The condensate
is pumped through the discharge hose to the drain.
The Conlift also has a safety overflow switch with a
1.7-metre electric cable. This overflow switch can be
connected to the condensate boiler and set to stop
the boiler in case of an alarm.
The Conlift has a thermal switch which stops the
motor in case of overload. When the motor has
cooled to normal temperature, it will restart
automatically.
6. Operating conditions
6.1 Maximum head
5.5 metres.
6.2 Maximum flow rate
600 l/h.
6.3 Temperatures
6.3.1 Ambient temperature
During operation: +5 °C to +35 °C.
6.3.2 Liquid temperature
Average temperature: +50 °C.
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