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Installation notes
Electrical connection of flame detectors
Commissioning notes
Building Technologies
·
Always run the high ignition cables separate from the unit and other cables while
observing the greatest possible distance
·
Install switches, fuses and earthing in compliance with local regulations
·
Make certain that the maximum permissible current rating of the connection
terminals will not be exceeded
·
Observe the polarity
Burner controls LFE1... are able to detect wrong polarity of live and neutral
conductors, in which case they initiate lockout at the end of «TSA»
It is important to achieve practically disturbance- and loss-free signal transmission:
·
Never run the detector cable together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
·
Observe the permissible length of the detector cables (refer to «Technical data»)
·
The ionization probe does not offer protection against electric shock hazard
·
Locate the ignition electrode and the ionization probe such that the ignition spark
cannot arc over to the ionization probe (risk of electrical overloads) and that it
cannot adversely affect the supervision of ionization
·
Insulation resistance
– Must be a minimum of 50 MW between ionization probe and ground
– Soiled detector holders reduce the insulation resistance, thus supporting
creepage currents
·
Earth the burner in compliance with the relevant regulations; earthing the boiler
alone does not suffice
·
For setting notes, refer to «Setting facilities on the burner control»
·
When commissioning the plant for the first time or when doing maintenance work,
make the following safety checks:
Safety check to be carried out:
a)
Burner startup with flame detector darkened
b)
Burner startup with flame detector exposed
to extraneous light
c)
Burner operation with simulated loss of
flame; for that purpose, darken the flame
detector during operation and maintain that
status
d)
Burner startup without air pressure signal
e)
Burner operation with simulated air pressure
failure
Anticipated response:
Lockout at the end of safety
time (TSA)
Delayed lockout
Lockout
Lockout during the prepurge
time
Immediate lockout
CC1N7461en
21.08.2018
3/19
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