Grundfos LC 221 Series, Installation And Operating Instructions Manual

Page: 14 / 832

English (GB)
14
5.1.4 Motor cable
The motor cable is fitted to the motor via a cable entry.
The enclosure class is IP68. The length of the cable is 10 m.
Nameplate, motor
Fig. 4 Nameplate, motor
5.1.5 Grinder system
The grinder system consists of two parts, a stationary grinder ring
and a rotating grinder head. See fig. 5.
The grinder ring is secured to the pump housing by means of a
bayonet socket and fixed in the right position with a screw.
The grinder head is secured to the shaft by means of the screw
that keeps the impeller in position. To adjust or replace grinder
system, see service instructions.
Fig. 5 Grinder system
5.1.6 Level sensor
The piezoresistive pressure sensor placed in the controller is
connected via a hose to a pressure tube in the tank. The screw
cap where the hose is connected includes a condensate trap and
a connection for a DN 100 tube. This tube, the pressure tube,
extends down into the tank. The rising liquid level compresses the
air inside the pressure tube and hose, and the piezoresistive
sensor transforms the changing pressure into an analogue signal.
The control box uses the analogue signal to start and stop the
pump and to indicate high water-level alarm. The pressure tube is
fixed underneath the screw cap and can be taken out for
maintenance, service and for cleaning the inside of the tube.
An O-ring ensures tightness.
The hose is supplied in a length of 10 m. The hose must be
connected to the controller.
Fig. 6 Screw cap with hose, DN 100 tube and condensate
trap
T
M
04
65
34
05
1
0
Pos. Description
1 Ex mark
2
Type designation
(not filled out, see name plate lifting station)
3 Product number
4 Production code (year/week)
5
Maximum head
(not filled out, see name plate lifting station)
6 Number of phases
7 Rated input power
8 Rated speed
9 Rated voltage,
Δ
10 Rated voltage, Y
11 Frequency
12 Weight without cable
13 Operation mode
14 CE mark
15 Explosion protection
16 Enclosure class to IEC
17
Maximum installation depth
(not filled out, see name plate lifting station)
18
Maximum flow rate
(not filled out, see name plate lifting station)
19 Maximum liquid temperature
20 Output power
21 Power factor
22 Rated current,
Δ
23 Rated current, Y
24 Starting capacitor
25 Operating capacitor
26 Insulation class
27 Country of production
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
TM
05
37
22
16
12
TM
05 033
2 101
1