Cuenod C 120 Instrucciones De Montaje página 33

Start-up
Checking and settings
Combustion components and secondary air
5
5
Checking and setting combustion
components
Burner is supplied already set for
natural gas.
· Remove safety screw D.
· Remove mobile spindle E.
· Open burner body.
· Disconnect both ignition cables.
· Remove hose from hydraulic
distributor.
· Loosen by two turns all four screws
1 of RTC plate.
· Loosen nut and side screw C
retaining gas and fuel oil feed line.
· Take out combustion components.
· Check settings of the following :
ignition electrodes and diffusers
according to available gas and
diagrams opposite.
· Adjust and place nozzle according to
boiler capacity.
· Check that O-ring J1 is in correct
position on gas feed line.
· Reassemble unit.
· Check the following :
– tightness of screw, of nut C, and
also of the hose's nut.
– possible leaks.
Each valve function is engraved on
distributor body, therefore: S, 1, 2, 3.
Electrical connections are called VS,
5
S1, S2, S3.
S+VS = Y17 Safety valve
1+S1 = Y1 Ignition and 1
nd
2+S2 = Y2 2 rate valve
rd
3+S3 = Y3 3 rate valve and nominal
4
power
1
Four screws to take out the
combustion components.
5
2
Two screws to set dimension Y
L
Value of secondary air.
05/2006 - Art. Nr. 13 013 500B
Secondary air
This is the amount of air flowing
between the turbulator diameter and
blast-tube. Turbulator position
(dimension Y) is read on the 0 to 50mm
graduated scale of the RTC
(Maintained head settings)-system.
Maximum secondary air is set at 50
and minimum at 0.
On delivery, dimension Y is set at 20 or
30mm (see table).
However, this value can be adjusted
according to the following :
firing quality (shock, vibration,
–
judder, time lag),
combustion quality.
–
Setting
This is performed without removing
burner, whether stopped or in
operation, according to enclosed
values.
By reducing dimension Y, CO
increases and vice versa.
· Loosen both screws 2 (diagram).
· Slide unit in chosen direction.
· Retighten both screws 2.
Dual fuel
type
C120
C160
C160
C210
Highlighted : equipment on delivery
st
rate valve
EN
2
Burner Dimension
power kW
Y mm
700 0
900 10
1100 20
1200 25
1100 20
1300 30
1600 50
1150 10
1400 20
1700 30
1900 40
2050 50
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