Installing A Diaphragm Pump; Installing The Controller; Electrical Connection; Setting The Controller Before Start-Up - Grundfos DUOLIFT Series Installation And Operating Instructions Manual

3.18 Installing a diaphragm pump

The diaphragm pump is optional.
1. Cut open the inlet for the diaphragm pump. See
section 3.8 Drilling holes in the tank.
2. Fit the DN 40 socket seal in the opening for the
diaphragm pump at the bottom of the tank. See
figures 19 and 20.
3. Insert the pipe from the diaphragm pump into the
inlet.
4. Secure the diaphragm pump and connect it to the
building discharge pipe according to the
installation and operating instructions for the
pump.

3.19 Installing the controller

Mount the controller on a wall with screws through
the mounting holes of the back plate.
The cable entries must point downwards, and the
user interface must be easily accessible.
See the installation and operating instructions for the
controller.

3.20 Electrical connection

DANGER
Electric shock
• Death or serious personal injury.
• Before starting any work on the
product, make sure that the power
supply has been switched off and that
it cannot be accidentally switched on.
3.20.1 Connecting the pump
Connecting the pump to a socket
1. Lead the pump cable through the cable gland.
2. Install the plug on the cable.
A Schuko plug is provided with the product.
3. Insert the plug into a socket.
Connecting the pump to a controller
1. Lead the cable through the cable gland.
2. Connect the cableto the controller.
See wiring diagram provided with the controller.
3.20.2 Connecting the level sensor hose to the
controller
1. Lead the hose through the corresponding cable
gland.
2. Connect the level sensor hose to the pneumatic
entry underneath the controller.
The hose is connected properly when it is pushed
all the way in and locked in position. See the
installation and operating instructions for the
controller.
3.20.3 Connecting an alarm switch to the
controller
1. Lead the cable through the corresponding cable
gland.
2. Connect the alarm switch cable to the terminal
for the high-water level alarm. See the
installation and operating instructions for the
controller.

3.21 Setting the controller before start-up

LC 220
Select settings via the DIP switches. See the
installation and operating instructions for the
controller.
LC 221
You must set the start level and rated current of the
motor to be able to start the product. All other
settings are preset.
1. Close the isolating valves.
2. Make sure the pump switches on the controller
are in position "OFF".
3. Switch on the controller.
4. When "L_01" is displayed (start level menu),
press [OK].Select the start level using the left and
right arrows, and press [OK].
For more information on which start level to
select, see "Setting start levels with controller" on
page 20.
5. Go to "L_02" (rated current menu) using the left
and right arrow and select the rated motor
current [A] according to the nameplate of the
pump motor.
Some of the factory settings can be changed. See
the installation and operating instructions for the
controller.
LC 220
http://net.grundfos.com/
qr/i/98503252
LC 221
http://net.grundfos.com/
qr/i/98503253
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