Starting Up The Product; Checking The Alarm; Product Introduction; Product Description - Grundfos Conlift1 LS Montage- Und Betriebsanleitung

3.2.1 Cable to condensate source or external
alarm
The Conlift has a safety overflow switch which can
be connected to the condensate source or to an
external alarm system. The switch is connected to an
alarm cable with free cable end.
Alarm systems with a control voltage of 250 VAC, 2.5
A, can be used.
On delivery, the alarm cable is connected to
terminals COM1 (brown) and NC2(blue) of the safety
overflow switch. See fig. 1.
Blue
Brown
Fig. 1 Wiring diagram
The alarm cable can be connected in two ways,
depending on application:
• Shutdown of condensate source
The safety overflow switch can be connected to a
Class-II low-voltage circuit.
To enable shutdown of the condensate source,
the COM1 and NC2 terminals of the safety
overflow switch must be connected in series with
the low-voltage thermostat circuit of the
condensate source.
• External alarm system
The COM1 and NO4 terminals can be used to
close a low-voltage alarm circuit.
To activate an alarm, the COM1 and NO4
terminals of the safety overflow switch must be
connected in series with the low-voltage alarm
circuit.

4. Starting up the product

Start up Conlift in accordance with local
regulations and accepted codes of good
practice.
1. Check that all hoses and connections are tight.
2. Connect the power supply.

4.1 Checking the alarm

1. To ensure that the alarm level is reached,
squeeze the outlet hose or close the isolating
valve, if fitted, and fill water into the tank. The
pump will be started via the float switch.
2. Continue filling water into the tank until the safety
overflow switch is activated. If no external alarm
is connected to the Conlift, this function can be
checked by means of a multimeter.
2
3 1
1 = COM1
2 = NO4
3 = NC2
The safety overflow switch must be
activated before the water starts running
out of Conlift.
3. Stop filling water into the tank and stop
squeezing the outlet hose. The alarm stops (the
switch opens). The pump continues operating.
When the stop level is reached, the pump stops.
After checking the alarm, push the inlet hose into the
lifting station and let the condensate from the boiler
or air-conditioning system run into the tank again.

5. Product introduction

5.1 Product description

Grundfos Conlift1 LS is a small, compact lifting
station with built-in-non-return valve.

5.2 Intended use

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
Biological hazard
Death or serious personal injury
- Use the product only to pump
condensates.
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 must 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.
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