Buderus 600 - 11S Installation And Servicing Instructions page 54

5 Servicing
5.3.18 Changing the hot water / boiler sensor
Shut the servicing valve.
Drain the 600 - 11S / 19S / 24S / 24C as per the
"Installation and Servicing Instructions".
Disconnection plug-and-socket connection on cable to
hot water / boiler sensor.
Remove insulation mounting (fig. 76, item 1) and detach
insulation.
Pull out the sensor fuses (fig. 77).
Unscrew hot water / boiler sensor and replace with new
unit.
Refit insulation and corresponding mounting elements.
Plug cable connection in once more.
Open servicing valves.
Fill the 600 - 11S / 19S / 24S / 24C and purge the system
of air as indicated in the installation and servicing
instructions.
5.3.19 Checking the hot surface ignitor
Disconnect the system from the power supply.
Loosen crosshead screw on UBA housing.
Swivel UBA housing downwards.
Open the UBA housing.
Unplug and remove hot surface ignitor from UBA housing
(fig. 78).
Check hot surface ignitor for free throughput.
If throughput is free, the hot surface ignitor is in order.
If the hot surface ignitor is in order, plug the cable into the
UBA housing.
Shut the UBA housing.
Swivel the UBA housing upwards and screw into place.
Connect system to mains power supply.
Subject to modifications resulting from technical improvements!
54 Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004
Fig. 76 Changing the hot water / boiler sensor
Fig. 77 Changing the hot water / boiler sensor
Fig. 78 Checking the hot surface ignitor
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
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