3004
8
GB
4. WORKING
4.1 COMBUSTION ADJUSTMENT
In conformity with EN267, the installation of the burner to the heat generator, setting and testing must all be
performed in respect of the instruction manual for the heater, including the controls on the concentration of
CO and CO
2
in the flue gases, the flue gas temperature and the average water and air temperatures in the
generator.
To suit the required appliance output, choose the proper
nozzle and adjust the pump pressure, the setting
of the combustion head, and the air damper opening in accordance with the following schedule.
The values given in the table refer to a CEN boiler (in accordance with EN 267). They refer to 12.5% of
CO
2
, at sea level, room temperature and light oil temperature at 20°C, 50 Hz power frequency and com-
bustion chamber counterpressure at 0.
Nozzle
Pump
pressure
Burner
output
Combustion head
adjustment
Air damper
adju
stment
GPH Angle bar kg/h ± 4% Set-point Set-point
2.50 60° 12 10.0 0 1.4
3.00 60° 12 12.0 1 2.1
3.50 60° 12 14.0 2.5 3.0
4.00 60° 12 16.1 4 3.5
4.50 60° 12 18.1 6 4.5
4.50 60° 14 19.5 6 6.0
The values given in the table are just an indica-
tion; to get the best performance from the
bu
rner, the regulations should be made on the
basis of the effective requirements of the gen-
erator.
With 60Hz power frequency, the burner must
be
re-set, closing the air damper, so that the
amount of intake air is reduced.
4.2 RECOMMENDED NOZZLES
Monarch type R
Delavan type W (
up to 3,00 GPH)
Delavan type B (over 3,00 GPH)
Steinen type SS - S
Danfoss type B - S
REPLACING NOZZLE, (see Fig. 11):
To replace nozzle, proceed as follows:
y Disconnect cables (4) from control box and pull
out the sensor llama (6).
y Unscrew nut (3), loosen screws (2) and remove
nozzle-holder assembly (1) by rotating slightly to
the right.
y Disconnect cables (4) from electrodes, unscrew
screws (3, Fig. 12, page 9) and remove the dif-
fuser disc support assembly (10) from nozzle-
hold
er assembly (1).
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