Table of Contents
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850146-00
IM-P693-06
EMM Issue 1
LCS3050
Low Water Level Switch for two probes
Installation and Maintenance Instructions
1. Safety information
2. General product information
3. Mechanical installation
4. Electrical installation
5. Commissioning
6. Fault finding
7. Technical information
8. Technical assistance
LCS3050 Low Water Level Switch for two probes
© Copyright 2020
1
IM-P693-06 EMM Issue 1
Printed in Germany
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Summary of Contents for Spirax Sarco LCS3050
- Page 1 1. Safety information 2. General product information 3. Mechanical installation 4. Electrical installation 5. Commissioning 6. Fault finding 7. Technical information 8. Technical assistance LCS3050 Low Water Level Switch for two probes © Copyright 2020 IM-P693-06 EMM Issue 1 Printed in Germany...
- Page 2 LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1...
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Page 3: Safety Information
(pressurised) hot-water installations. Functional Safety acc. to IEC 61508 The level switch LCS3050 is certified acc. to IEC 61508 only if used in combination with level probe LP40. This standard describes the functional safety of safety-related electrical/electronic/ programmable electronic systems. - Page 4 This architecture consists of two channels that detect and diagnose faults in each other. If a fault is detected, the equipment combination LP40/LCS3050 will go to the safe state, which means that the contacts of both output relays will open the safety circuit.
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Page 5: Terms And Abbreviations
SIL 3 60 % - < 90 % SIL 2 SIL 3 SIL 4 90 % - < 99 % SIL 3 SIL 4 SIL 4 ≥ 99 % LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 6: General Product Information
2. General product information 2.1 Intended use The level switch LCS3050 is used in conjunction with level probe LP40 to limit the water level in steam boilers and (pressurised) hot-water plants. Water level limiters switch off the heating when the water level falls below the set minimum level (low water). -
Page 7: Mechanical Installation
Fig. 2 The code switches are accessible after removing the lower terminal strip. The terminal strips can be unplugged after undoing the right and the left fixing screws. LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 8: Installation In Control Cabinet
3.2 Installation in control cabinet The level switch LCS3050 is clipped onto the support rail 7 type TH 35, EN 60715 in the control cabinet. Name-plate Level Switch See installation LCS3050 Niveauschalter instructions Commutateur de niveau Betriebsanleitung 24 V beachten IP 40 (IP20) ±20%... -
Page 9: Electrical Installation
Wire link, on site, when used as water level limiter according to EN 12952 / EN 12953 CEP Central earthing point in control cabinet Level probe LP40. Fig. 4 LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 10: Schematic Representations Of Arrangements
4.2 Schematic representations of arrangements Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Item Level probe(s) LP40 Level switch LCS3050 Safety circuit Level switch LCS3050 for low-level pre-alarm LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 11: Supply Voltage
The level switch opens two separate safety circuits. Functional safety IEC 61508, SIL 3. Further applications in accordance with national sets of regulations Combination consisting of 1 level probe LP40 and 1 level switch LCS3050 as water level limiter and 1 Fig. 9 level probe LP40/1 level switch LCS3050 as first low-level alarm. - Page 12 Provide the output contacts with a 2 A o r 1 A (for 72 hours operation) slow-blow fuse. Note In the event of an alarm the level switch LCS3050 does not interlock automatically. If a lock function is required by the installation it must be provided in the follow-up circuitry (safety circuit).
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Page 13: Factory Setting
Configuration: Operation with two level probes LP40. S1/S2 of code switches 4 and 5 set to OFF. Danger The terminal strips of the LCS3050 are live during operation. This presents the danger of electric shock! Always cut off power supply to the equipment before mounting, removing or... -
Page 14: Checking Switchpoint And Function
Check installation of level probe. Make Upper vent hole flooded. sure that the level in the protection tube corresponds to the actual water level. LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 15: Operation
Delay time has elapsed, output react as if there was an alarm. Red LEDs for level probe 1/2 contacts open. Signal outputs 1/2 are illuminated. closed. Test finished. LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 16: Fault Finding
Malfunction in level switch Diagnosis LED 3 and LED instantaneously. next: detected. alarm 1 and 2 illuminated. Signal outputs 1 and 2 are Press key AL1 or key AL2. closed instantaneously. LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... - Page 17 Once the fault is eliminated, the level switch returns to normal operation. After elimination of the fault switch off the supply voltage and switch it on again after approx. 5 sec. LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1...
- Page 18 Item CEP Central earthing point in control cabinet Level probe LP40. Fig. 13 Note The self-checking routine of the level switch LCS3050 reduces U to 0 Volt, if 10-12 executed cyclically. LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1...
- Page 19 6.3 Emergency operation for water level limiter If the level switch LCS3050 works with two level probes LP40 (water level limiter to EN 12952-07, EN 12953-06), the installation can continue operating in emergency operation mode according to EN 12952 and EN 12953 under constant supervision with only 1 level probe, in case that one of the two installed level probes fails.
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Page 20: Decommissioning/Replacing Level Switch
HF interference suppression by means of hinged-shell ferrite rings. 6.5 Interlock and interlock deactivation In the event of an alarm the level switch LCS3050 does not interlock automatically. If a lock function is required by the installation it must be provided in the follow-up circuitry (safety circuit). -
Page 21: Technical Information
Degree of contamination: 2, overvoltage category III to EN 61010-01. Housing: IP 40 to EN 60529 Protection Terminal strip: IP 20 to EN 60529 Weight approx. 0.5 kg LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 22: Content Of Package
Requirements made on water level limiting & control equipment. approval Type approval no. TÜV · SWB · XX -XXX (see name plate) Content of package 1 x Level switch LCS3050 1 x Installation manual LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1... -
Page 23: Technical Assistance
Returning faulty equipment Return all items to your local Spirax Sarco representative. Ensure all items are suitably packed for transit (preferably in the original cartons). Please provide the following information with any equipment being returned: Your name, company name, address and telephone number, order number and invoice and return delivery address. - Page 24 Spirax Sarco Ltd Runnings Road Cheltenham GL51 9NQ United Kingdom www.spiraxsarco.com LCS3050 Low Water Level Switch for two probes IM-P693-06 EMM Issue 1...
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