Installation Notes - Siemens LME7 Series Basic Documentation

Building Technologies
HVAC Products
1.3

Installation notes

• Always run the high-voltage ignition cable separate from the unit and other cables
while observing the greatest possible distance
• Do not mix up live and neutral conductors
• Install switches, fuses and earthing, in compliance with local regulations
• The connection diagrams show the burner controls with earthed neutral conductor.
In networks with nonearthed neutral conductor and ionization current supervision,
terminal X10-05/1 must be connected to the earth conductor. It must be made cer-
tain that local regulations are complied with (e.g. protection against electric shock
hazard) since AC 230 V (60 Hz) mains voltage produces peak leakage currents of
2.7 mA
• Make certain that the maximum permissible current rating of the connection termi-
nals is not exceeded
• Do not feed external mains voltage to the control outputs of the unit. When testing
the devices controlled by the burner control (fuel valves, etc.), the LME7... must not
be connected with the units
• Signal cable AGV50... from LME7... to AZL2...or from LME7... to OCI410...:
Since the BCI has no safe separation from mains voltage, the signal cable AGV50...
between LME7... and AZL2..., or LME7... and OCI410..., must conform to certain
specifications. Siemens has specified the signal cable AGV50... for use under the
burner hood (cable supplied by Hütter; refer to «Technical data»). When using sig-
nal cables of other manufacture, Siemens' requirement will not necessarily be met
• Do not lay the signal cable AGV50... from the LME7... to the AZL2... together with
other cables, use a separate cable
• Service operation with a longer signal cable from LME7... to AZL2..., or from
LME7... to OCI410...:
If a longer signal cable is required for service work for example (short-time,
<24 hours), note that above usage under the burner hood no longer applies and, for
this reason, the signal cable can be subjected to increased mechanical stress. In
that case, extra cable sheathing is required
• Both the signal cable AGV50... and the AZL2... must be shipped and stored so that no
damage due to dust and water can occur when used in the plant later on
• The AZL2... must be used in a dry and clean environment
• Check the connecting lines of the air pressure switch for short-circuits
Basic Documentation LME7...
1 Safety notes
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CC1P7105en
13.10.2009