Cuenod C 285 GX 507/8 T1 [8/56] Checking and adjustments combustion implements and secondary air

Cuenod C 380 GX 507 T2 [8/56] Checking and adjustments combustion implements and secondary air
05/2008 - Art. Nr. 13 013 503D8
Start-up
Checking and adjustments
Combustion implements and secondary air
Secondary air (dimension Y)
This is the amount of air flowing between
the tubulators diameter and blast-tube.
On delivery, dimension Y is set at 453 in
T1 and 753 in T2.
However,
- this value can be adjusted according to
the following :
- gas firing quality (shock, vibration,
judder, time lag),
combustion quality for gas flows.
Setting
It is performed when burner is shutdown,
with removal of combustion implements,
following the procedure outlined in the
earlier section.
By increasing dimension Y, secondary
air reduces, the CO
2
increases and vice
versa.
• Loosen both screws from the
turbulator support.
• Slide the turbulator support into the
required direction.
• Measure dimension Y; tighten both
screws.
• Adjust the diffuser according to the
type of head and gas used following
the enclosed plan.
• Reassemble the whole unit.
• Make sure the flat gasket is available
and in position on the gas inlet line.
Natural gases -low NOx
Bold : factory settings
secondary
air
maxi
secondary
air
mini
T1 Y=453 Y=478
T2 Y=753 Y=778
Natural gases & propane
Bold : factory settings
secondary
air
maxi
secondary
air
mini
T1 Y=453 Y=478
T2 Y=753 Y=778
Checking and setting combustion
Burner is supplied already set for natural
gas.
• Remove the safety screw D.
• Remove the movable pin E.
• Open the body of the burner.
• Disconnect the two ignition cables on
the transformer and the ionization
sensor cable.
• Unscrew the nut and the lateral screw
C which immobilise the gas supply
line.
• Withdraw the combustion
components.
• Check the settings :
of the ignition electrodes, the
ionisation sensor, and of the diffusors
according to the gas available and the
accompanying diagrams.
• Check to ensure the presence and the
correct positioning of the sheet gasket
on the gas supply line.
• Re-assemble.
• Check :
- the tightness of the screw and the
nut C,
- subsequently for leaks.

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