Grundfos Multilift MD, Installation And Operating Instructions Manual

Page: 10 / 704

English (GB)
10
• setting of delay times:
– stopping delay (time from the stop level is reached till the
pump is stopped) - reduces water hammer if pipes are long
– starting delay (time from the start level is reached till the
pump is started)
– alarm delay (time from a fault appears till an alarm is
indicated). This prevents short-time high-level alarm in case
of temporary high inflow to the tank.
• automatic current measurement for alarm indications
• setting of current values:
– overcurrent (preset)
– rated current (preset)
– dry running current (preset).
• operating indication of:
– operating mode (auto, manual)
– operating hours
– impulses (number of starts)
– highest measured motor current.
• alarm indication of:
– pump status (running, fault)
– phase sequence failure and missing phase
– thermal-switch failure
– high-water alarm (5 seconds delay)
– time for service/maintenance (selectable).
• selection of automatic alarm resetting
• fault log of up to 20 alarms
• selection between different start levels
• selection of maintenance interval (0, 3, 6 or 12 months).
As standard, the LC 221 has four potential-free outputs for:
– pump running
– pump failure
– high water-level alarm
– common fault.
Furthermore, LC 221 has six digital inputs for the following
functions:
– connecting an analogue sensor (4-20 mA or 0-5 V)
– connecting up to four level switches and pressure sensors
instead of analogue sensor. An additional float switch can
be connected to the alarm input as backup for the analogue
sensor.
– connecting a separate level switch to be used for flood
detection outside Multilift MD or MLD. Lifting stations are
often installed in a sump inside the basement - the lowest
point in the building. In case of e.g. groundwater inflow or
water pipe burst, an alarm will be indicated by the controller.
– connecting a piezoresistive pressure sensor PCB
(pre-assembled)
– connecting an external alarm reset
– connecting the thermal switch of the motor.
For updates and further adjustments, a PC Tool can be
connected. See service instructions.
To allow for the situation that the normal power supply should fail,
a battery (accessory) can be installed which activates an acoustic
alarm (buzzer). The buzzer is activated as long as the fault exists.
It cannot be reset.
In case of sectional power failure, the common alarm output
which is a potential-free changeover contact can be used to
forward the alarm signal to a control room by means of an
external power source.
Type key, LC 221 controller
Nameplate, LC 221 controller
The controller type, voltage variant, etc. are stated in the type
designation on the nameplate situated on the side of the
controller cabinet.
Fig. 8 Example of an LC 221 nameplate
Example LC 221 .2 .230 .1 .10 .30
LC 221 = controller type
1 = one-pump controller
2 = two-pump controller
Voltage [V]
1 = single-phase
3 = three-phase
Max. operating current [A]
Capacitors [
μ
F]
Starting method:
[ ] = DOL
SD = Star-delta
TM
05
47
82
33
11
Pos. Description
1 Type designation
2 Product number
3 Production code (year, week)
4 Number of phases
5 Maximum pump input current
6 Maximum voltage at potential-free contact
7 Maximum backup fuse
8 Minimum ambient temperature
9 Version
10 Serial number
11 Rated voltage
12 Power consumption
13 Maximum current at potential-free contact
14 Weight
15 Maximum ambient temperature
16 Frequency
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Type
Prod.-No.
P.c.
f
Phases U
G
Serial no.
P
max
T
Amb max
I
Pump max
V
A
Hz
C
O
kg
98189707
LC 221.1.230.1.10.30/150 MPU
98189707
1221
1
10
250
16
0
V01
0012
220-240
3
2
5.2
40
50
U
contact max
I
Fuse max
T
Amb min
A
C
O
I
contact max
V
W
A
I
c < 10 kA
IP55
Made in Germany