Settings for marathon
®
burners with mechanical linkage
dreizler A 3001 E - 18.12.2015 | A 2070 - 1.12 | EN - 09.11.2012
45
'play' in the linkage. This is acceptable, as no 'unsafe' condition develops. The occurence of a 'hole' in the
CO
2
curve can be observed in control ratios of > 1:4.
All fixing parts and terminal parts must be checked on all levers and axes for proper sealing and tightness.
Furthermore, the 'play' (hysteresis) of our control curve must be checked by way of measurements of the
CO
2
and CO content at 50% burner load, first when running CLOSED, then running OPEN.
NOTICE:
Adjust air flow to 'more' or 'less' where required.
12.7.3 Setting the ignition phase
Select an intermediate position with servomotor at 50% of burner load = 25% of max. head pressure.
Adjust cam 3 = 'ignite' accordingly.
The servomotor moves into ignition position via the ignition switch, while the automatic gas control box
is in the pre-ignition phase.
Regard
ing
proce-
dures
Procedures for the shifting of the
- swivel range
AD GD adjustment rod
Swivel ranges
of air damper (AD) of gas
damper (GD)
Effects on
GD
1
Symmetri-
cal
Symmetrical
unchanged
3 Adjustment rod
none
2
Symmetri-
cal
forwards
direction LK
clockwise
shorter
Initially
OPEN
faster,
more gas,
CO
2
>
3
Symmetri-
cal
backwards
away from LK
anti-clock-
wise
longer
Initially
OPEN
slower,
less gas,
CO
2
<