Cuenod NC12 - Description and Settings Combustion Air

10/2007 - Art. Nr. 13 017 700B10
Start-up
Description and settings
Combustion air
1-stage burner
Manual control 103B
• Loosen the locking screw.
• Select the opening of the air flap
between 0 and 9 from the table as a
function of the power to be delivered.
• Adjust at the indicated value.
• Tighten the screw.
2-stage burner
Servomotor Y10
1 Four red adjustable cams
2 Positioning mark for the cams
relative to the graduated
cylinders 4
S Cam adjusting screw
4 Three cylinders graduated
from 0 to 160°
5 Air flap positioning pointer
6 Plug-in electrical connector
Cam functions
Cam Function
I Nominal air flow
II Air closing on shutdown: 0°
III Stage 2 fuel valve energized
• Set between value of the cam IV
and value of the cam I. In most
cases, a setting just at the half is
suitable.
IV First stage air flow.
Setting
• Remove the cover.
• Check zeroing of cam drum.
• Pre-set the cams according to the
boiler power and the values shown in
the accompanying table.
To do so:
• Actuate the cams using screws S.
The angle position is read in relation to
the index placed on each cam.

1-stage
burners
Burner
p
ower kW
Air flap
o
p
enin
g
(
°
)
80 30
100 40
120 60
110 30
130 35
160 60
160 60
180 75
210 90
160 70
180 90
210 90
NC21 +
MBDLE407
NC21 +
MBDLE412
NC12
NC16
1st
sta.
2d
sta.
1st
stage
cam IV
stage
change-
over
cam III
2d
stage
cam I
50 80 12 20 30
55 110 17 30 80
60 120 20 30 70
60 110 15 25 40
70 140 18 30 50
90 160 20 40 75
80 150 20 35 50
90 170 22 35 70
90 180 22 35 75
110 210 25 60 90
80 150 20 35 52
90 170 25 45 70
90 180 25 45 82
110 210 25 45 90
2-stage
burners
NC21 + MB-
ZRDLE407
NC21 + MB-
ZRDLE412
Burner
power kW
Air flap opening
in °
NC12
NC16