Applications; Function; Operating Conditions; Maximum Head - Grundfos Conlift1 Montage- Und Betriebsanleitung

4. Applications

Conlift is designed for the pumping of condensate
from the following:
• boilers
• air-conditioning systems
• cooling and refrigeration systems
• air dehumidifiers
• evaporators.
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
Conlift must not be used for flammable
liquids.
Warning
Conlift must not be installed in potentially
explosive environments.
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 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 Conlift, local
regulations may require the installation of a
neutralisation unit, even for pH values of 2.5 or
higher.
6

5. Function

The condensate runs by natural fall through a hose
into the tank. See section
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.
Conlift also has a safety overflow switch. This
overflow switch can be connected to the condensate
boiler and set to stop the boiler in case of an alarm.
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.

6.4 Operating mode

Conlift is designed for max. 60 starts per
Caution
hour.
S3 (intermittent operation): 30 % according to DIN
EN 0530 T1. This means that the system is running
for 18 seconds and is stopped for 42 seconds.
7. Installation.