Flushing Out The Hot-Water Heat Exchanger - Buderus 600 - 11S Installation And Maintenance Instructions Manual

Refit the heat exchanger by following the above procedure in
reverse. Note the following:
– The gasket between the two halves of the casing shell
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 casing shells.
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 from the sleeve with the lip seal facing
downwards (fig. 51, item 1) and withdraw it from the outlet
(fig. 51, item 2).
Remove the safety cover and clean the trap.
Fill the syphon 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.
4.2 Flushing out the hot-water heat
exchanger
Turn mains power switch to "0".
Shut cold-water tap (accessory).
Open a hot-water tap (e.g. at the washbasin) and then
close it again in order to check the pressure of the water
being supplied.
Loosen the cable on the stand-by sensor.
Release the plastic clip from the bottom insulation of the
hot-water heat exchanger and remove the insulation.
Connect the system to a power flusher unit and flush it out.
Remove temperature sensor for DWH warm out and stand-
by sensor, and replace with flushing hoses (fig. 52).
Reassemble.
Open cold-water tap (accessory).
Open hot-water tap (e.g. at washbasin) and thoroughly
flush out system.
Turn mains power switch to "I".
Subject to modifications resulting from technical improvements!
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Maintenance
Fig. 51 Removing the condensate trap
Fig. 52 Flushing out the hot-water heat exchanger
Buderus • http://www.buderus-domestic.co.uk
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