14/16 CC1N7421E December 04, 1998 Landis & Staefa Division
This function measures the flame establishment time with ionization supervision.
With the AGQ2..., this function cannot be used.
In the running position, the green flame signal LED is steady on.
The flame establishment time is read in the running position according to the following
sequence:
When reading the flame establishment time, the burner is put out of operation.
Reading is in the form of a blink code as multiples of 0.4 s.
Diagnostics table
Blink code Flame establishment
time with «TSA» = 3 s
Flame establishment
time with «TSA» = 5 s
1 x
•
≤ 0.4 s ≤ 0.4 s
2 x
••
≤ 0.8 s ≤ 0.8 s
7 x
•••••••
≤ 2.8 s ≤ 2.8 s
12 x
••••••••••
••
--- ≤ 4.8 s
•
The flame establishment time is the period of time from the moment «BV1» opens to
the moment the flame signal is detected for the first time
•
The flame establishment time remains stored for one startup sequence and is re-
ascertained the next time the burner is started up
•
During the period of time the flame establishment time is interrogated, the fault status
outputs are deactivated:
–
Burner remains shut down
It is restarted only after a reset is made
–
Press lockout reset button for 0.5...3 seconds
Note:
If ignition and ionization electrode are not correctly located, ignition effects may
lead to incorrect measurements.
Interrogation of flame
establishment time
FS
AL
Green LED on
LED on
Press lockout
reset button for
> 3 s
Blink code
~
Off
Approx. 3 s
Blink code
~
Operation
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