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Setting facilities on the burner control
General notes
Setting elements
Setting the prepurge
time
Building Technologies
·
Prior to making any settings, disconnect the burner control from the mains supply
·
Loosen all 6 retaining screws and remove the unit cover
·
The switching cam numbering starts from the motor
·
The camshaft can be manually turned to any position (direction of rotation
clockwise when viewed from the sequence switch motor)
·
Loosen the securing screw of the red cam N8
·
Turn camshaft manually until the required prepurge time appears next to the index
mark (stamped on the sequence switch bracket)
·
Hold camshaft firmly and rotate cam N8 until the contact stud actuated by it jumps
out or until the cam runs against the stud
·
Tighten the cam securing screw carefully and then check the adjusted time for
accuracy. The adjustable time is also visible through the viewing window when the
burner control is in its start position
Adjustment of the setting mark of the red cam N8 to the time marks on the black cam
N7 produce the prepurge times shown below table.
I II III
N7
N8
UL1
Operating switch ON / OFF of the sequence switch
motor
N1
Cam 1, fixed
N2, N3 Cams 2 and 3, adjustable (first safety time)
N4
Cam 4, fixed
N5
Cam 5, adjustable (second safety time)
N7
Cam 7, fixed
N8
Cam 8, adjustable (prepurge time)
PA
Program indicator disk
Cam N8 adjusted to...
LFE1...
... cam N7
mark
Setting at the stop
7761p04/0698
Factory setting
LFE1.1...
t1 = 8 s
4 s
I
18 s
9 s
II
28 s
14 s
III
63 s
31.5 s
approx. 30 s
approx. 15 s
or 60 s
or 30 s
CC1N7461en
21.08.2018
13/19
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