Igema SMLC 1 Manuale utente
Low water level
limiter SMLC1
With level electrode
EL 030 / EL 19-2
D-08-B-166 -1
Edition 07/11
Installation and operating instructions
2
-Table of contents-
1. Risks and Safety precautions 3-4
1.1 General safety instructions ....................................................... 3
1.2 Exclusion of liability ..................................................................
2 Use in compliance with regulations
3. Function SMLC1 -6
3.1 Operating principle ................................................................... 6
4. Design 7
.1 Installation dimensions and descriptions...................................... 7
. Installation 8
6. Configuration 8
7. Fitting the electrode 9-11
7.1 Fixing elements for receiving electrodes ............................... 10-12
7.2 Mounting in mounting housing ............................................ 12-13
7.3 Adjusting the electrode plugs ................................................... 1
7. Shortening the electrode extension........................................... 1
8. Power connection 1 -16
8.1 Wiring diagram ...................................................................... 15
8.2 Procedure.............................................................................. 16
8.3 Testing.................................................................................. 16
9. Technical Data 16-17
9.1 Device data ...................................................................... 16-17
9.3 Maximum ratings of potential free contacts................................ 17
10 Appendix 18
10.1 Warranty............................................................................... 19
11 EC Declarations of conformity 20
3
General safety instructions
1. Avoidance of risks to persons and property
• Only use the device supplied in accordance with the intended planning.
• Extensions and modifications to the device must only be carried out with our approval.
• Observe accident prevention regulations and system-specific safety instructions.
• Read and observe assembly and operating instructions.
2. Limitations of use
The device must only be used in accordance with the details in these operating
instructions or for the parameters agreed in the supply contract (see name plate) and the
application.
3. Avoidance of risks and damage
• Disseminate the assembly and operating instructions to the departments responsible
for “goods in, transport, assembly, commissioning and maintenance”.
• If this device is passed on to third parties these assembly and operating instructions in
the relevant language of the country must accompany it.
• Work on the device should only be carried out by trained staff specially commissioned
and exclusively with the current disconnected.
• Read and observe the assembly and operating instructions carefully and keep them in a
safe place.
• Take note of and follow the safety instructions printed in bold and highlighted
in the individual sections!
• When transporting, avoid e.g. knocks and putting down heavily, this can lead to
damage.
• For intermediate storage ensure that the storage location is suitable for the device.
The storage location must be dry and the device secured against damage.
4. Symbols
In these assembly and operating instructions safety instructions are specially marked
with the following symbols:
means that if they are not observed there is risk to life and / or
significant damage to property may occur.
Danger
means that attention is particularly drawn to technical requirements.
Take note
Exclusion of liability
IGEMA GmbH Mess- und Regelsysteme will assume no liability if the above-mentioned
regulations, instructions and safety precautions are not noted and followed.
5
2. Use in compliance with regulations
The self-monitoring low water level limiter SMLC1 in combination with the level
electrodes EL 030 or EL 19-2 is a multi-dynamic limiter of a special type in
accordance with DIN VDE 0116 and Wasserstand 100. The self-monitoring
control system (SMC) enables first failure identification at the time of occurrence
and immediately switches off the downstream relays.
3. Function
The general function of the limiter SLMC1 is displayed by lighting of the green
LED “UB”. The input stage of the SMLC1 compares the values of the isolation
and limiter electrode in a Wheatstone bridge using a mains synchronised
reference voltage. The dimensioning of this stage allows the identification of
short circuits and interruptions in the electrode power line. The core element of
this limiter is a timer and control unit monitoring the output of the input stage in
the rhythm of 0 ms for its in-phase dynamic behaviour.
If the behaviour is correct the timer and control unit activates the driver of the
final stage with its own momentum. The final stage has its own specified time
which only activates the output relays when phasing and time of the activation
are carried out within a fixed framework. The power flowing via the contacts of
the safety chain is limited in the SMLC1 by amp fuse protection by which
sticking of the contacts is prevented. With static activation or failure of the
activation the final stage will switch off after a delay time.
Faults and lack of water are displayed by the lighting up of the red LED
“FAULT”. In the case of lack of water after a time delay of one second together
with the display “FAULT” the contacts of the additional fault reporting are
closed. After the delay time that can be set at , 8, 12, 16 seconds switch-off of
the relays of the safety chain takes place. Locking must be carried out on site.
The delay time is set at seconds.
6
3.1 Operating principle SMLC1
The SMC system is capable of identifying any possible first failure the moment it
occurs and switching off the downstream relays. Failure to detect a fault is
therefore impossible.
As further dynamic monitoring, the periodic overall test of the device takes place
every 2 minutes for one second as a fully automatic process. The yellow LED
“TEST” shows that the test is being carried out followed by confirmation by the
red LED “FAULT” lighting up briefly.
Because of this special first failure safe design manual tests are not necessary so
there are no test switches on the SMLC1.
Alarm Safety chain
Mains
Electrode
7
4. Design
The SMLC1 is supplied in a plastic plug-in housing for fitting into switch cabinets.
The housing is designed for quick fitting with a spring catch for the DIN EN
50022 standard 35 mm carrier rail and for screw fixing on a mounting plate.
4.1 Installation dimensions and descriptions SMLC1
Base Front view Side view
with connecting terminals
1 Screws for snap fastening
2 Holes, ø .3 mm
3 Fixing screws
Snap fastening
5 Holder
6 Cable feedthrough
7 Hood
SMLC1
8
. Installation
Secure with protection class in accordance with current regulations
!
With snap fastening for standard 3 mm carrier rail
according to DIN EN 0022
•Fix device on standard carrier rail by means of the snap fastening ( ).
•Release fixing screws (3) and pull hood (7) from holder (5).
Without snap fastening
•Release fixing screws (3) and pull hood (7) from holder (5).
•Release screws (1) and remove snap fastening ( ). Drill through the
marked point (2) in the holder (5) with ø .3 mm drill.
•Fit base (5) on base plate with two M screws.
6. Configuration
The preset switch-off time can be changed.
It is to be agreed with the local expert.
Setting the switch-off time:
•Open SMLC1. To do this release the fixing screws (3) and pull the hood
(7) off the holder (5) – with the device disconnected from the power
supply.
•After unlatching the back plate pull the circuit board sandwich out of the
hood (7). On the smaller circuit board at the front edge there is a two-
pole DIP switch (see diagram) via which the switch-off time can now be
changed as follows:
DIP switch Switch-off
1 2 time
off off s
on off 8 s
off on 12 s
on on 16 s
Circuit board
sandwich
DIP switch
9
7. Fitting the electrode
It is essential to remove the protective tube for transport before
installation!
If several electrodes are screwed into a flange the electrode plug (2)
and the associated electrodes should be labelled to prevent confusion!
Fixing the electrode extension (9)
Push the electrode extension (9)
approx. 30 mm over the electrode shank
(8) until the ø .3 mm hole
matches the threaded hole
in the electrode shank.
Screw up both parts by means
of the enclosed M set screw with
SW2 hexagon socket.
Screwing in the electrode
•Release screw (1) and pull off
electrode plug (2).
•Clean sealing surfaces and check
•Insert sealing ring (6)
•Lubricate thread (7) with heat-resistant
solid lubricant (e.g. graphite).
•Screw in electrode and tighten,
max. tightening torque Md=1 0 Nm.
On commissioning the boiler
check the electrode screw connection
in the flange for tightness and if necessary
retighten!
1 Screw
2 Electrode plug
3 Seal
4 Contact carrier
5 Threaded ring
6 Sealing ring
7 Thread
8 Electrode shank
9 Electrode extension
10
7.1 Fixing elements for receiving the electrodes
The flanges, seals, screws and nuts listed in the table below are laid out in
accordance with the Technical Rules for Steam Boilers (TRD) and tested by the
Technischen Überwachungsverein (TÜV) [Technical Inspection Agency].
Flange according to DIN
Drilling plans 1-8
“Bohrbild” means: drilling plan
Seals according to DIN
PN DN DIN Sealing
surface Form Threaded hole Material
0 2635 B
63 2636
100 / 160
50
2638
DIN 2526 E
according to drilling
plan
1,2
1.0 60
0 2635 B
63 2636
100 / 160
100
2638
DIN 2526 E
according to drilling
plan
1,2,3, ,5,6,7,8
1.0 60
PN DN DIN Material
0 EN 151 -1 IBC
asbestos-free
63
100 / 160
50 2697 RSt 37-2/ 0.5
graphite
0 EN 151 -1 IBC
asbestos-free
63
100/160
100 2697 RSt 37-2/ 0.5
graphite
Indice
Altri manuali Igema Sistema di controllo
