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Safety notes
Caution:
The present Basic Documentation describes the broad range of applications and functions
offered by the LMU... and shall serve as a guideline. The correct functioning of the unit must
be checked and confirmed by functional tests on the boiler and / or on the relevant plant!
• Degree of protection IP 40 to EN 60 529 for burner controls must be ensured by the burner or boiler
manufacturer by adequately mounting the LMU...
• In the geographical areas where DIN standards apply, mounting and installation must be in compliance
with the relevant VDE requirements, especially DIN / VDE 0100, 0550 and DIN / VDE 0722!
• The electrical wiring inside the boiler must conform to country-specific and local regulations!
• Where (S)LTs are required, refer to the safety-related notes given in section «Electronic (S)LT»!
• It must be ensured that spliced individual wires cannot get in contact with adjacent terminals.
Use adequate ferrules!
• Prior to commissioning, check wiring and parameterization carefully!
The boiler manufacturer is responsible for the correct parameterization of the LMU..., which must be in
compliance with the relevant standards and regulations!
U
• When commissioning the plant, check all safety functions!
• Before performing any wiring changes or other work in the connection area of the LMU..., completely
isolate the unit from the mains supply!
• Lay high-voltage ignition cable completely separate from all other cables!
• Ensure protection against electric shock hazard on the LMU... and on all electrical connections
through appropriate mounting!
• There is no absolute protection against incorrect use of the RAST5 connectors.
For this reason, check the correct connector assignments prior to commissioning the plant!
• The burner manufacturer must ensure protection against electric shock hazard on all AC 230 V terminals
by fitting dummy plugs!
• When wiring the unit, AC 230 V mains voltage and extra low-voltage must always be run strictly
separate to warrant protection against electric shock hazard!
−
DIN EN 60335
−
DIN EN 60730-2-5
• Protect the mains-powered ionization probe against electric shock hazard!
The LMU... is a safety device!
• Do not open, interfere with or modify the unit!
• Siemens is not liable for damage resulting from unauthorized interference!
• In the event of blown fuses inside the LMU..., return the unit to Siemens!
(Customer may replace mains fuse F1 only once )
• Electromagnetic emissions must be checked on an application-specific basis!
To ensure the safety and reliability of the LMU..., the following points must also be observed:
− Condensation, formation of ice and ingress of water are not permitted!
If such conditions have occurred, make certain the unit is completely dry before switching on!
− Static charges must be avoided as they can damage the unit's electronic components when touching them
Recommendation:
2/171
Siemens Building Technologies
HVAC Products
Use ESD equipment !
Basic Documentation LMU54... / LMU64...
CC1P7494en
07.11.2002
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