Buderus 600-19R Installation And Servicing Instructions page 30

4 Maintenance
Remove the diffusion head (fig. 35, item 2) on the
underside of the heat exchanger by withdrawing the
securing pin (fig. 35, item 1) and unscrewing the diffusion
head.
Clean the front and back cover of the heat exchanger and
the heat exchanger with water or compressed air.
Clean the burner with compressed air only.
Take care not to damage the fins of the heat exchanger.
Refitting (fig. 36) :
NOTE
Excessive flue gas temperatures may be an
indication of an incorrectly-fitted diffusion
head.
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.
CAUTION
Take care not to damage the insulation on the
diffusion head.
Check to ensure that the heat exchanger has been fitted
the right way round. The upper securing-pin groove must
be horizontal (fig. 36, item 1).
Refit the heat exchanger by following the above procedure
in reverse. Note the following:
The gasket between the front and back cover of the heat
exchanger should normally be replaced. Fit the new gasket
by pressing in from the top on both sides, and without
stretching. DO NOT attempt to cut the gasket to size.
Check the heat exchanger for leaks BEFORE
reassembling the front and back cover of the heat
exchanger.
Check O-ring seals (spiral), and replace as required.
Smear the O-ring seal with a thin layer of silicone grease.
4.1.3 Cleaning the condensate trap
Remove the trap and withdraw it from the outlet see fig. 37.
Clean the condensate trap.
Fill the condensate trap with water and then reassemble in
reverse order.
Measuring the gas input pressure (flow pressure).
Check the gas/air ratio.
Leak test in operational condition.
Measuring the carbon monoxide content.
Carry out function testing.
Subject to modifications resulting from technical improvements!
30 Installation and maintenance instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 05/2004
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Fig. 35 Removing the diffusion head
Fig. 36 Refitting the heat exchanger
Fig. 37 Removing the condensate trap
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
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