Worcester Greenstar i Series Installation, Commissioning And Servicing Instructions page 38

SERVICE AND SPARES
Fig. 85 Baffle removal
ACCESS COVER REMOVAL
Refer to figure 86.
1. Remove the two pozi-drive screws
2. Remove the access cover
3. Remove the gasket.
Fig. 86 Access cover removal
CLEANING THE PRIMARY HEAT EXCHANGER
▶ Refer to figure 87 and access the heat exchanger flue ways by
inserting the cleaning brush (7 716 192 312) through the top access
hole in the casing, removal of panel shown in figure 83.
▶ Clean heat exchanger flue ways using the cleaning brush removing any
debris from the access point in the sump.
▶ Clean around the sealing surface on the sump.
▶ Replace the access cover.
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1.
2.
3.
2.
1.
1.
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▶ Using a suitable container to collect water from syphon connection at
the base of the boiler flush heat exchanger with water.
▶ Re-assemble ensuring that the lower baffle (2) and the top baffle (1)
are refitted correctly.
▶ Refer to figure 84 when re-fitting the burner to ensure that it fits
centrally within the heat exchanger and location tabs are situated in
location holes.
▶ Ensure that the seal is replaced with a new seal and ensure that the
seal is correctly fitted.
▶ Check the syphon unit is clean before refitting to boiler.
▶ Reassemble and check combustion as stated in "SETTING THE AIR/
GAS RATIO" section on page 36.
THE HEAT EXCHANGER DOES NOT HAVE TO BE
REMOVED TO CLEAN.
The heat exchanger is shown removed from the boiler to
illustrate cleaning more clearly.
Fig. 87 Cleaning heat exchanger
NOTICE: Heat exchanger baffles.
The baffles (1) and (2) must be refitted into the heat
exchanger in the order shown in figure 85. Failure to do
so may result in damage to the boiler.
NOTICE: CO/CO CHECKS
2
▶ If the joint between the Air/Gas manifold and heat
exchanger is disturbed sealing gasket must be
replaced.
▶ After completing the service of the appliance, the CO/
CO must be checked and set to the limits shown in
2
"Setting the air/gas ratio" on page 36.
▶ When replacing the burner gasket ensure that the
clamping plate is fully tightened down to the heat
exchanger.
CLEANING THE SIPHON
There is no need to remove the Siphon to clean.
To drain debris from the syphon, release the clips and remove the
drainage cap from the bottom of the siphon.
Catch the debris and condensate from the siphon in container.
6 720 804 532 (2012/09)