Burner Head Setting; Boiler Lockout Indicator On - Bosch WORCESTER Greenstar Danesmoor 18/25 Installation, Commissioning And Servicing Instruction Manual

6.4.4

Burner head setting

Adjustments to the burner head are made on the basis of the required
output, refer to table 10 for the required setting for your boiler.
Fig. 71 Burner head adjustment thumbwheel
One complete rotation clockwise (cw) from the minimum position
equals approximately one millimetre. Adjust the thumb-wheel to achieve
the setting indicated in the table 10, according to your appliance model
and output.
Using an engineer's rule or vernier gauge measure from the lip of the
blast tube to the inside of the break plate as show in the figure below.
Ensure that the break plate is level, check at four equal points to get an
average of the required setting. The setting tolerance should be no more
than ± 0.25mm
D
Fig. 72 Burner head adjustment
Greenstar Danesmoor Kitchen ErP+ and Kitchen System
X=0
X
1
m m
6720821683-23.1Wo
ErP+ - 6 720 821 686 (2018/04)
6.4.5

Boiler lockout indicator on

If the burner fails to establish a normal firing pattern or flame failure
occurs the flame monitoring photocell mounted in the burner body will
alert the burner control box to shut the burner down and provide a safe
lockout state indicated by the illumination of the lockout indicator [H].
▶ Wait two minutes then press the lockout reset button [J]
( figure 73) to initiate another start sequence.
▶ Repeat procedure until a flame is established.
H
6720808218-56.1Wo
Fig. 73
▶ Start and run for three minutes then switch off.
▶ Release the burner retainer nut.
▶ Remove the burner
▶ Check for after-spurting from the nozzle, indicated by oil saturation
on the combustion head [2] figure 75.
If after-spurting occurs:
▶ Remove the combustion head [2] figure 75 and electrodes, hold
the burner vertically to unscrew the nozzle and fill the nozzle holder
with kerosene.
▶ Refit the nozzle, electrodes, combustion head [2] figure 75 and
the burner.
▶ Restart and run for three minute intervals until after-spurting stops.
Commissioning
J
43