44
ซ.บรมราชชนนี
70
ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม.
10170.
โทร:
02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Function
Basic mode of operation of the flame safeguards in connection with the LEC1 control
unit:
When used with the LEC1, the flame safeguard feeds the flame signal into the burner
control
’s control program the same way as if the flame safeguard was a component of
the burner control (same as with an oil or gas burner control) . In the event of non-
ignition, loss of flame during burner operation or faulty flame signal during burner off or
purging times, the burner will always be shut down and the burner control will initiate
lockout. The switching functions needed to feed the flame signal into the burner
control
’s control circuit are provided by flame relay «FR» of the flame safeguard and
the 2 auxiliary relays «HR1» and «HR2» of the LEC1 control unit. The LEC1 control
unit also delivers the sequence control for the flame simulation test in connection with
the LAE10 flame safeguard, and the flame detector test with the LFE10. The test is
controlled via the connecting line between terminal 15 of the burner control and
terminal 6 of the respective flame safeguard.
Both tests
start about 7 seconds after a controlled shutdown
are continued during burner off times
Are continued during the ensuing prepurge time
end 3 seconds before start of the safety time
Following flame signals during this test time lead to lockout with interlocking of the
LEC1 control unit:
Extraneous light
Ageing flame detectors
Other defects of the flame supervision equipment
In the flame safeguard, the switching functions required are performed by
auxiliary relay «HR3».
Since in the case of flame supervision with an ionization probe, it is not necessary to
carry out a test, the connecting line between terminal 15 of the burner control and
terminal 6 of the flame safeguard is not required here.
Information!
Instead, terminal 6 must be connected to the live wire.
Example: By making a connection to terminal 1, 5 or 7.
Any flame signal
– be it a normal flame signal during operation or a faulty signal – is
indicated by the indication lamp at housing of flame safeguard.
9/15
Building Technologies Division
CC1N7781en
01.08.2016
