Start-up, calibration and operation of the burner
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2916050
GB
5.7
Sequence of operation - LAL control box
Switching times are given in seconds, in the burner start-up se-
quence (see Tab. M).
Tab. M
Key for the times (Fig. 41 and Fig. 42)
t1
Pre-purge time with air damper open
t2
Safety time
t3
Pre-ignition time, short (“Z” connected to terminal “16”)
t4
Interval between voltage at terminals “18” and “20”
t5
Air damper running time to “OPEN” position
t6
Air damper running time to low-flame position (MIN)
t7
Permissible after-burn time
t8
Interval to the “OPEN” command for the air damper
5.8
Final checks (with the burner working)
Tab. N
Switching times
Seconds
t1
18
t2
4
t3
2
t4
12
t5
optional
t6
optional
t7
12
t8
4
D2871
Fig. 41
FULL MODULATION
D2883
Fig. 42
HIGH - LOW
Obscure the flame sensor and switch on the control devices
The burner should start and then lock-out about 5 s after start-
ing
Illuminate the flame sensor and switch on the control devices
Burner should go into lock-out
Obscure the flame sensor while the burner is operating
Flame should go out and burner lock out within 1 s.
Switch off control devices while the burner is operating
The burner should stop
WARNING
Make sure that the mechanical locking systems on
the different adjustment devices are fully tightened.
