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Electrical connection of the flame detectors
It is important to achieve practically disturbance-free and loss-free signal transmission:
∂ Never run detector cables together with other cables
– Line capacitance has an impact on the flame signal
– Use a separate cable
∂ The ionization probe does not offer protection against electric shock
∂ Position the ignition electrode and the ionization probe so that the ignition
spark cannot arc over to the ionization probe; risk of electrical overloads
∂ Observe the permissible detector cable lengths; refer to the
Technical data
∂ Mount and adjust the flame detector so that it only detects the flame to be
supervised in each case
∂ Connection of UV flame detectors QRA2M and QRA10M is only permitted
if additional module AGK30 is used
∂ Protect the UV cell adequately against the following UV sources: halogen lamps,
welding equipment, special lamps, ignition sparks, as well as high-energy X-rays
and gamma rays
∂ Polarity or short circuit at the connection terminals of the RAR9 does not lead to
a flame signal
∂ Polarity at the connection terminals of UV flame detectors QRA2 / QRA2M /
QRA4 / QRA4M / QRA10 / QRA10M does not lead to a flame signal.
A short circuit at the connection terminals of UV flame detectors QRA2 / QRA2M
/ QRA4 / QRA4M / QRA10 / QRA10M leads to:
- Fault code LOC10: at operating level (terminal 6 of the LFS1 active)
- No flame signal: test level (terminal 6 of the LFS1 inactive)
∂ In general the terminal 5 of LFS1 must not be grounded! When replacing a LFE10
by a LFS1.2 it is particularly important that the ground connection has to be
removed from terminal 10 at the terminal base of LFE10. The ground connection
of QRA10 has to remain unaltered in order to ensure the protection class 1.
∂ If the ionization electrode connected to the burner ground short-circuits, there is
no flame signal
Disposal notes
The flame safeguard contains electrical and electronic components and must not
be disposed of together with domestic waste.
Local and currently valid legislation must be complied with.
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Building Technologies CC1N7782en 18.04.2018