Continuous Fan Operation; Continuous Pilot (Only Lmv50 / Lmv52); Reaction Of Extraneous Light In Standby - Siemens LMV50 Series Manual

Building Technologies

4.2.3.11 Continuous fan operation

In the case of burners that could be damaged by return heat (e.g. several burners
operating on 1 combustion chamber), continuous purging can be activated. In that
case, the fan runs in all phases.
A pressure switch relief valve must be connected on the output (X4-03) so that the air
pressure switch can be tested.
This valve is controlled in phase 21 on burner startup, causing the air pressure to fall,
allowing the Air pressure OFF signal can be delivered.
The function can be activated and deactivated.
The following settings are also available:
off Sloop The continuous purging function is activated. If the safety loop / burner
flange is open, the fan is switched off and the speed for the variable
speed drive is set to 0 (if the no-load speed is not parameterized to 0).
deac/VSD-SL The continuous purging function is deactivated. If the safety loop /
burner flange is open, the speed for the variable speed drive is set to 0
(if the no-load speed is not parameterized to 0).
Attention!
The off Sloop setting causes that the fan and the variable speed drive to not be
controlled if the safety loop / burner flange is open .
⇓ This must be taken into account with respect to return heat!
Parameter ContinuousPurge (deactivated / activated / off Sloop /
deac/VSD-SL)

4.2.3.12 Continuous pilot (only LMV50 / LMV52)

For fuel trains using a pilot (Gp1, Gp2, LOgp, HOgp), control of the pilot valve / ignition
burner valve can be activated in phases 52 through 62.
Parameter ContinuousPilotGas (deactivated / activated)
ContinuousPilotOil (deactivated / activated)
Attention!
The following applies for applications conforming to EN 676:
For systems in which the pilot burner is in operation during the running time of the
main burner, separate flame detectors must be provided to supervise the pilot and
main flame.
The flame detector for the main flame must be installed in such a way that it does
not detect the pilot flame under any circumstances.

4.2.3.13 Reaction of extraneous light in standby

As a response to extraneous light in the standby phase, it is possible to select start
prevention or lockout.
Parameter ReacExtranLight (Lockout / Startblock)
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CC1P7550en
22.05.2018