44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
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Mode of operation of the flame safeguards in the case of multiflame supervision with LEC1 (detailed
connection diagram, e.g., for gas burners)
As with dual supervision, the control contacts of
the flame relays of all flame safeguards must
be connected in series in the case of multiflame
supervision.
FR
A burner causes all other burners to go to
lockout if:
LFS1.2
- The flame is not established during the
safety time, or
- The flame is lost during operation.
FR
LFS1.2
FR
LFS1.2
After the burner control has been reset,
correctly operating burners can only be
restarted once the faulty burner has been
shut down.
In that case, the operating switch must not only
bridge the control contacts of the relevant flame
safeguard, thus closing the control chain again,
but must also break the phase wire connection
to the ignition transformer and the fuel valves.
Likewise, after rectification of the error, the
burner can only be restarted together with the
other burners; that is, only after all burners
7782a11/1115 have previously been shut down.
Attention!
An ignited UV tube is a source of UV radiation. In the case of flame supervision by
means of flame detectors, the detectors must be placed in a way that ensures there
is no direct visual contact between them. If this is not observed, there is a risk of
loss of safety functions.
Attention!
When replacing the LFE10 with the LFS1.2, the earth connection at terminal 10
in the LFE10 terminal base must be removed; terminal 5 of the LFS1.2 must
not have an earth connection. Earth connection of QRA10 remains unchanged
to ensure the protection class 1.
Operating switch OFF / ON ↑ for each burner
Fuel valves for 1st and 2nd stage
Internal auxiliary relay (test mode switchover)
Auxiliary relay NO contact
30/40
Building Technologies CC1N7782en 18.04.2018
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