Worcester Greenstar 12/18 Installation, Commissioning And Servicing Instruction Manual page 30

Commissioning
▶ Adjust the air shutter [3] figure 48 and pump pressure [2] figure 47
as shown in the table 8 on page 31. The burner should ignite
following a pre-ignition period of approximately 15 seconds.
▶ If changing the burner output, check the position of the air damper
disc is correct to the output as shown in the table below.
1
12/18 ONLY
black foam strip
& half disk
12/18
Fig. 48
[1] Reset button
[2] Blast tube
[3] Air shutter adjuster
[4] Captive screws air intake cover
Adjust position of air damper discs to suit burner output
(see table 8 on page 31), located as above. Access by
undoing the two screws [4] to release the air inlet cover.
Boiler lock out 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 [1].
▶ Wait 2 minutes then press the lockout reset button [1](see
figure 49) to initiate another start sequence.
▶ Repeat procedure until a flame is established.
Fig. 49 Reset button
▶ Start and run for 3 minutes then switch off.
▶ Check for after-spurting from the nozzle, indicated by oil saturation
on the combustion head [2] figure 51.
If after-spurting occurs:
▶ Release the burner retainer nut.
▶ Remove the burner, combustion head [2] figure 51 and electrodes,
hold the burner vertical to unscrew the nozzle and fill the nozzle
holder with kerosene.
▶ Refit nozzle, electrodes, combustion head [2] figure 51 and the
burner.
30
2
3
4
18/25
1
▶ Restart and run for 3 minute intervals until after-spurting stops.
▶ Start and run for 20 minutes
▶ Remove sampling point plug [1] to check the smoke reading is
between 0-1. If the smoke level is above 1, check the combustion
settings are correct and the oil nozzle is in good condition.
1
Fig. 50
Smoke readings may be inaccurate until the smoke from
burning organic binder in the access door insulation has
ceased.
▶ Check the CO levels and adjust the air shutter [6] figure 51 setting
2
according to the table opposite.
▶ Check the flue gas temperature is close to the values shown in the
table 8 on page 31.
If the flue gas temperature is too high and the baffles are
correctly fitted, then reduce the oil pump pressure [3]
figure 51, 5-10 p.s.i. to compensate for nozzle
variations. If the pump pressure has been changed, the
CO2 levels must be rechecked and air shutter adjusted if
necessary.
Greenstar Danesmoor External ErP and External System
6720809437-35.1Wo
ErP - 6 720 813 288 (2014/09)