Refitting Components - Bosch WORCESTER Greenstar Heatslave II External 12/18 Installation, Commissioning And Servicing Instructions

Installation
2
3
7
4
Fig. 42 Nozzle access
Refer to figure 43:
▶ Check that the nozzle [1] and the electrode [2] alignment settings
are correct.
▶ Ensure that the nozzle [1] is aligned centrally within the combustion
head [3].
▶ Inspect for any visible defects.
2 - 2.5mm
Fig. 43 Nozzle and electrode alignment
Burner head adjustment
The burner head adjustments are made to achieve the required output
from the burner. The adjustments are made via a thumb-wheel on the
burner. Refer to section 6.3.3 for setting information.
Oil pump - Single pipe connection
Connecting the oil pump for a single pipe system:
▶ The pump is factory set for single pipe operation with the flexible oil
pipe fitted.
▶ Check connections before use.
Oil pump - two pipe connection
Converting the oil pump for a double pipe system:
1. Check the inlet pipe connection.
▶ Unscrew the return plug [1].
▶ Screw in by-pass screw [2] that is supplied in a plastic bag attached
to the oil pump.
2. Connect the flexible oil pipe return hose [3] (not supplied) to the oil
pump and return pipe fixing and tighten to secure (for routing see
figure 40.
28
1
5
8
6
6720821683-12.1Wo
2
3 ± 0.3mm
4 ± 0.5mm
1
6720821683-14.1Wo
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Fig. 44 Converting to double pipe system
[1] Return plug
[2] By-pass screw
[3] Return pipe connection
5.8

Refitting components

WARNING: Flue gas leakage.
The seal between the burner and the mounting flange
must form a gas tight seal to prevent leakage of
potentially dangerous gases from the combustion
chamber.
▶ Unless the burner is level when pushing the burner
into the flange the O ring may not seat properly
allowing flue gas to escape!
▶ Always check that the O-ring seal (Fig. 45 item A) is
in good condition before fitting the burner.
Replace the O-ring seal if defective.
Fig. 45 12/18 Burner O-ring seal shown
Refer to figure 46
1. Align burner combustion head into the boiler collar.
▶ Locate the burner retainer [A] over the threaded lug on the collar [B],
ensure that the burner is level and push the burner firmly onto the
flange ensuring the O-ring seal is fully engaged. Support the burner in
position and secure with the retaining nut [C]. Tighten sufficiently to
hold the burner but do not over tighten.
▶ Check that the burner is seated correctly on its mounting flange and
that the oil hose/s are routed correctly as shown in Fig. 40 on page
27 and not trapped in front of or underneath the burner.
2. Refit the flexible air duct and secure with clip [D].
Greenstar Heatslave II External
2
3
A
6720821683-26.1Wo
2022+ 6 721 843 980 (2022/01)