Maintenance
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34
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
z
Remove securing pin on flow and return flow conduit
(fig. 48) of heat exchanger.
z
Remove spiral heat exchanger by pulling towards front
(fig. 48). Drain any water remaining in the heat exchanger
into the condensate trap.
z
Remove the diffusion head (fig. 49, item 2) on the
underside of the heat exchanger by withdrawing the
securing pin (fig. 49, item 1) and unscrewing the diffusion
head.
z
Clean the two casing shells of the combustion chamber,
heat exchanger and burner with water or compressed air.
Take care not to damage the fins of the heat exchanger.
Refitting (fig. 50) :
z
Screw the diffusion head in as far as it will go on the
underside of the heat exchanger (the final turn of the heat
exchanger increases the clearance between the pipes) and
insert securing pin.
z
Check to ensure that the heat exchanger has been fitted
the right way round. The upper securing-pin groove must
be horizontal.
Fig. 48 Securing pin on spiral heat exchanger
Fig. 49 Removing the diffusion head
1
2
Fig. 50 Refitting the heat exchanger
NOTE
Excessive exhaust temperatures may be an
indication of an incorrectly-fitted diffusion
head.
CAUTION
Take care not to damage the insulation on the
diffusion head.
