English (GB)
13
7. Protection and control functions
7.1 Pump controllers
The pumps can be controlled via the Grundfos
controllers: LC, LCD 107, LC, LCD 108 and LC, LCD
110.
Fig. 14
Pump controllers
7.2 Level controllers
LC controllers are for single-pump installations. LCD
controllers are for two-pump installations.
The following LC and LCD pump controllers are
available for level control:
•
LC 107, LCD 107 with air bells
•
LC 108, LCD 108 with float switches
•
LC 110, LCD 110 with water level electrodes.
In the following description, "level switch" can be air
bells, float switches or water level electrodes,
depending on the pump controller selected.
7.2.1 LC, LCD
The LC controller is fitted with two or three level
switches: one for start and one for stop of the pump.
The third level switch, which is optional, is for high-
level alarm.
The LCD controller is fitted with three or four level
switches: one for common stop and two for start of
the pumps. The fourth level switch, which is optional,
is for high-level alarm.
For further information, see the installation and
operating instructions for the pump controller
selected.
7.3 GU01 and GU02
GU01 is a monitoring device for monitoring the stator
temperature and water penetration into the motor. It
receives a digital signal.
GU02 is a monitoring device for monitoring stator
and bearing temperature as well as water
penetration into the motor. It receives an analog
signal.
Both monitoring devices must be connected to the
control panel via a relay.
GU01 and GU02 are manufactured for Grundfos. For
further information, please contact your local
Grundfos company.
For further information, see the data sheets for GU01
and GU02 at www.grundfos.com.
7.4 Switches and sensors
All DWK.H pumps have thermal protection
incorporated in the stator windings as standard.
Pt100 sensor is available as optional for stator
windings and bearing.
TM
04
40
9
8
07
09
S1
S3
E1 E2 E3
Minimum
Maximum
Maximum
Minimum
Description
Sensor
type
Pump power [kW]
5.5 - 15
22-90
Stator windings
Bimetal
Built-in
Built-in
Pt100
Optional
Optional
Bearing
Pt100
-
Optional
Motor housing
Electrode
Built-in
Built-in
