25
15. Systems for 100 % standby operation with
4 levels (5 electrodes)
Description (see also page 102):
The pumps are controlled by the liquid level in the pit.
•
The electrode, pos. 2, starts the first pump.
•
The electrode, pos. 4, starts the next pump.
•
The electrode, pos. 1, stops both pumps after expiration of the
“stop delay” (can be set).
•
The pumps operate alternately.
•
The electrode, pos. 3, activates the high-level alarm.
15.1 Electrical connection
Systems for 100% standby operation with 4 levels (5 electrodes),
page 102.
Figure F1 on page 102 shows all electrical connections required
to connect the LCD 110 for
100% standby operation with 4 levels
(5 electrodes)
.
The operating voltage and frequency are marked on the controller
nameplate. Make sure that the controller is suitable for the elec-
tricity supply on which it will be used.
All cables/wires must be fitted through the Pg cable entries and
gaskets (IP 65).
Maximum back-up fuse is stated on the controller nameplate.
If required according to local regulations, an external mains
switch must be installed.
Note:
If the motor PTC resistor/thermal switch is connected, the
factory-fitted short-circuit jumper
must be removed
(terminals
T11-T21). For correct installation of PTC resistor/thermal switch,
see the installation and operating instructions of the pump.
Key to the symbols in fig. F1 on page 102:
15.2 Setting
Systems for 100% standby operation with 4 levels (5 electrodes),
page 102.
The module CU 214 has a 10-pole DIP switch in the bottom right
corner, see fig. 15.
Note:
During setting, the controller must be off circuit for at least
1 minute to ensure the correct configuration during start-up after
change of the DIP switch setting.
The DIP switch setting offers the following possibilities:
•
selection of starting delay and automatic test run (switch 4),
•
setting of stop delay (switches 5, 6 and 7),
•
selection of automatic alarm resetting (switch 9),
•
selection of automatic restarting (switch 10).
Fig. 15
Set the DIP switch as shown in fig. 15.
Each individual switch (1 to 10) of the DIP switch can be set to
position OFF or ON.
Note:
The DIP switch
must
not
be set to other switch
combinations than those described in this section.
Set the switches 1 to 10 as follows:
•
Switches
1
,
2
and
3
, application type:
When the DIP switch setting is changed, the controller must
be switched off for at least 1 minute!
Before starting any work on pumps used to pump liq-
uids which could be constituted as being hazardous
to health, thorough cleaning/venting of pumps, pits,
etc. must be carried out according to local regula-
tions.
Before making any connections in the LCD 110 or
work on pumps, pits, etc., it must be ensured that the
electricity supply has been switched off and that it
cannot be accidentally switched on.
Before starting work on the system, switch off the
supply voltage and lock the mains switch in
position 0.
Any external voltage connected to the system must
be switched off before work is started.
The LCD 110 must be connected in accordance with
the rules and standards in force for the application in
question.
Pos.
Description
Terminal
number
R
Reference electrode.
11
1
Electrode for common stop.
12
2
Electrode for start of the first pump.
22
3
Electrode for high-level alarm.
32
4
Electrode for start of the next pump.
42
TM
04
23
40
23
08
This setting determines the actual application type
(100% standby operation with 4 levels (5 electrodes),
page 102)
.
