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Warning notes
Mounting notes
Siting the ionization
probe
Installation notes
Only with LGA41...
Only with LGA52... /
LGA63...
2/11
Siemens Building Technologies
HVAC Products
To avoid injury to persons, damage to property and the environment, the follow-
ing warning notes should be observed!
Do not open, interfere with or modify the unit.
•
All activities (mounting, installation and service work, etc.) must be performed by
qualified staff
•
Before performing any wiring changes in the connection area of the LGA..., com-
pletely isolate the burner control from the mains supply (all-polar disconnection)
•
Ensure protection against electric shock hazard by providing appropriate protection
for the burner control's connections terminals
•
Check to ensure that wiring is in an orderly state
•
Press the lockout reset button / operating button only manually (applying a force of
no more than 60 N), without using any tools or pointed objects
•
Fall or shock can adversely affect the safety functions. Such units may not be put
into operation even if they do not exhibit any damage
•
Ensure that the relevant national safety regulations are complied with
•
The ionization probe and ignition electrode must be positioned such that the igni-
tion spark cannot arc over to the ionization probe
•
The position and polarity of the ignition electrode can adversely affect the magni-
tude of the flame signal. Reversal of polarity of the ignition transformer's connec-
tions on the primary side usually solves the problem
•
Since the burner bars form the earthed counter-electrode, the burner must be ad-
justed such that the flame is hot and stable and in firm contact with the burner bars.
With pulsating flames or yellow-burning flames resulting from lack of air, a very low
or even no ionization current is generated so that the burner control will initiate
lockout
•
To isolate the burner control from the mains supply, use an all-polar switch with a
contact gap of at least 3 mm
•
Secure the earthing lug in the terminal base with a metric screw and a lockwasher
or similar
•
Switches, fuses, earthing, etc., must be in compliance with local regulations; pri-
mary fuse max. 10 A (slow)
•
Make absolutely certain that life and neutral conductors are correctly connected to
terminals 1 and 2 of the burner control; otherwise, no flame signal will be generated
•
Connect the gas pressure switch and other monitoring devices - whose contacts
must be closed from startup to controlled shutdown - in series with «R» and «W»
•
If the fully closed position of the main gas valve «BV2» shall be checked on burner
startup, the closed position contact must be included in the loop between terminals
9 and 3. In addition, the connecting links between terminals 9 and 11 and 8 and 3
must be fitted
•
During the startup sequence, terminal 6 carries voltage and may not be used as an
auxiliary terminal
•
The auxiliary contact of a gas valve for checking the fully closed position must be
included in the loop between terminals 9 and 3
•
During the startup sequence, terminals 9 and 6 carry voltage and may not be used
as auxiliary terminals
•
Connect the load controller of 2-stage burners to terminal 5 in series with «BV2»
CC1N7418en
08.04.2004
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