Bosch WORCESTER Greenstar Heatslave II 12/18 Installation, Commissioning And Servicing Instruction Manual page 47

4. Unscrew burner retaining nut [12] and remove the burner [13] and
store safely away from the boiler.
2
.
3
4
3.
5
E
5
E
6
G
6.
11
Fig. 81
See the following instructions for detail of some of the service
requirements listed below:
▶ Check and clean the burner.
▶ Replace burner nozzle and flexible oil hose/s.
▶ Check and clean the baffle retainers.
▶ Check and clean the baffles.
▶ Check that the flue damper is correctly fitted, if required.
▶ Check and clean the heat exchangers surfaces.
▶ Check the combustion chamber access door insulation board.
▶ Check that the flue system is unobstructed and clean as necessary.
▶ Clean or replace all oil filters.
▶ Check that the condensate system is not obstructed, clean and refill
the condensate trap.
Clean the burner
▶ Remove the two hex head screws [1] and remove the air intake cover
[2] and clear any debris from the air intake and air damper.
▶ Remove the four screws [3] and remove the suction inlet [4] to gain
access to the fan.
▶ Clean both sides of the fan and suction inlet cover with a brush and
compressed air.
▶ Check the condition of the gaskets between these parts and replace
if necessary.
▶ Note the position of the air shutter adjustment and check the air
shutter moves freely.
▶ Check that the fan rotates freely.
Greenstar Heatslave II 2022 + 6 721 843 978 (2022/01)
1.
1
9
8
7
12
O
7.
13
P
6720821683-16-1.Wo
▶ Reassemble the components.
2
4.
4
5.
Fig. 82 Fan access
10
Oil burner nozzle
Before removing or fitting a new nozzle refer to figure 83:
▶ Remove the screws [1] from the blast tube [2] and remove the blast
tube
There is a recirculation tube fitted to the 12/18 models,
this does not need to be removed from the blast tube
▶ Unplug the HT leads [4]
▶ Loosen the screw [3] securing the break plate [5] and slide the unit
off
▶ Use a suitable spanner to stop the nozzle body turning
▶ Remove the nozzle [8]and secure the new nozzle, hand tight
▶ Tighten the nozzle utilising the two spanners used during removal, do
not overtighten
Fig. 83 Nozzle access
Refer to figure 84 Photo cell alignment
▶ Refit the break plate [5] ensuring that the break plate is pushed fully
on to the nozzle holder [6].
Service and Spares
3
1
2
5
3
8
7
6
4
6720821683-12.1Wo
2
1
6720821683-13.1Wo
47