Cuenod NC4, Инструкция по эксплуатации

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12/2008 - Art. Nr. 4200 1013 9300A 33
Commissioning
Commissioning the burner also involves
simultaneous installation by the fitter or
his representative; only they can
guarantee the boiler room complies with
currently accepted practices and
regulations in force.
Beforehand, the fitter must have
completely filled the suction line with fuel
oil, vented the primary filter and checked
that the manual quarter-turn and
protection valves function correctly.
Preliminary checks
• Check the available electric voltage
and compare it with the recommended
value.
• Switch off the burner power supply.
• Check absence of voltage.
• Close the fuel valve.
• Read the manufacturer's service
instructions for the boiler and the
regulator.
• Check the following:
- the water pressure in the heating
circuit,
- the operation of the circulator,
- the opening of the mixer valve,
- the setting of the boiler thermostat
and the ambient thermostat,
- the rating of the fuses,
- that the combustion air supply to the
boiler house and the combustion
product exhaust pipe are working
correctly and compatible with burner
capacity and fuel,
- the operation of the draught
regulator on the flues,
- the fuel oil level in the tank,
- that the aspiration line has been
filled,
- the position of the hoses:
- suction and return,
- the supply pressure of the fuel, if
boost: 2 bar max,
- the opening of the protection and
primary filter valves.
Setting
The burner is preset in the factory.
If this pre-setting does not correspond to
the boiler power, follow the instructions
below.
• In the table opposite, choose the
nozzle calculated for the nominal
power of the boiler with an efficiency
rating of 92%.
• Carry out the following settings on the
combustion head:
- dimension
Y graduated from 0 to
20 mm,
- manual control of the air flap
103B graduated from 0 to 18.
Firing
• Close the regulator circuit.
• Unlock the control unit.
• The burner is in service.
• Wait until the reheater thermostat has
closed (for burners with reheaters).
The burner starts up
• Carry out a combustion check: CO
2
,
opacity and exhaust gas temperature.
To increase the CO
2:
• Reduce the air flap opening and vice
versa. Modifying its value may require
a correction of dimension
Y , by turning
screw 3 .
To modify the exhaust gas index
• Open the air flap to make it lighter, and
vice versa.
• Check the combustion parameters
under actual operating conditions
(doors closed, etc.), and test that the
various circuits are sealed.
• Record the results in the relevant
documents.
Safety checks
• Check, while the burner is functioning:
- the opening of the regulator circuit,
- the safety shutdown with lockout,
with no flame,
- the seal on the boiler front,
- the operation of the control devices
(if present),
- the vacuum pressure of the fuel
supply circuit, maximum 400 mbar
or 305 mm Hg.
1 Suction.
2 Return.
3 Nozzle outlet.
4 Pressure tap G1/8
5 Vacuum gauge connector G1/8
6 Pressure setting.
7 Single line indication.
10 Solenoid valve coil.
Y1 Solenoid valve.
Check for fuel oil leaks
• Connect a pressure gauge and a
vacuum gauge to the pump.
• The readings are taken while the
burner is operating.
• Check subsequently for leaks.
45° 60°
20 1,8 - 0,50 11 5 9
24 2,2 - 0,60 11 5 10
27,3 2,5 - 0,60 11 10 10
32,7 3,0 0,75 - 11 10 13
37,1 3,4 0,85 - 11 10 15
43,6 4,0 1,00 - 11 12 15
48 4,4 1,10 - 11 20 18
54 4,9 1,25 - 11 5 8
67 6,1 1,50 - 11 10 11
74 6,8 1,75 - 11 15 13
Air flap
103B
Scale values
Boiler power
kW
Fuel-oil flow
kg/h
Pump
pressure
bar
Nozzle Danfoss S
US Gal/h
Spray angle
Dimension
Y
mm
NC9 H101A
NC4 R101A
NC4 H101A
Burner
NC6 H/R101A