Checking And Replacing Parts - Buderus 600 - 11R Installation And Servicing Instructions

5.3

Checking and replacing parts

5.3.1 Checking the flue gas thermostat
Detach plug-and-socket connection on cable to flue
gas thermostat. Ensure that no cable is earthed
(grounded) at any point.
Allow the flue gas thermostat to cool down. Activation
temperature: Buderus 600 - 11R / 19R / 24R: 105 °C
Check flue gas thermostat for continuity. If continuity
is not present, the flue gas thermostat is defective.
Replace any flue gas thermostat found to be defec-
tive. Ensure you use only genuine Buderus spare
parts.
If the flue gas thermostat is working correctly, plug it
in once more.
5.3.2 Replacing the flue gas thermostat
Unscrew the flow-backup mounting.
Detach the cable plug at the flue gas thermostat.
Loosen both retaining screws on the flue gas thermo-
stat.
Remove the flue gas thermostat and replace with a
new unit (fig. 48).
Retighten the retaining screws.
Reconnect the cable plug.
Screw the mounting into place.
5.3.3 Replacing the UBA
Disconnect the system from the power supply.
Loosen the two screws on the UBA (fig. 49, item 1).
Carefully turn the UBA around with the backside
facing up (fig. 50).
Note the position of the cable plugs, disconnect all
cable plugs.
Fit a new UBA.
Reconnect all plug-in cables to their correct sockets.
Turn the UBA around and place back onto the
bracket.
Tighten the two screws.
Connect system to mains power supply.
Subject to modifications resulting from technical improvements!
Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Fig. 48 Buderus 600 - 11R / 19R / 24R :
replacing the flue gas thermostat
Fig. 49 Replacing the UBA
Fig. 50 Backside of the UBA
Buderus • http://www.buderus-domestic.co.uk
Servicing
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