Buderus 600 - 11S Installation And Servicing Instructions page 56

5 Servicing
5.3.22 Replacing the ionisation electrode
Remove the CombiVENT air combination unit.
Loosen the plug-and-socket connection of the ionization
electrode.
Loosen screw (fig. 81, item 1) by a half-turn and slide bar
to remove.
Pull electrode to remove, and fit new unit.
Reassemble by following the above procedure in reverse.
5.3.23 Checking the three-way motorised valve for
correct operation
Disconnect the system from the power supply, set mains
switch to "0".
Dismantle condensate trap.
Remove protective cap from three-way valve.
Remove bottom insulation from internal hot-water reservoir
(applies to 600 - 24C only).
Push in catch on regulating motor and
Remove bayonet connector by twisting anticlockwise.
Remove regulating motor.
Set the mains switch to "I" and press the "reset" button.
Once the 600 - 11S / 19S / 24S / 24C is in operation, open
one of the hot-water taps.
=.
The UBA displays "
motor starts up (check for movement of adjusting lever),
the motorised head is working.
Shut the hot-water tap.
Set the mains switch to "0".
If the motorised head is working, attach the regulating
motor and lock into place by twisting the bayonet
connector.
Connect the system to the power supply, set the mains
switch to "I" and press the "reset" button.
Subject to modifications resulting from technical improvements!
56 Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004
" for hot water. If the regulating
Fig. 81 Replacing the ionisation electrode
Fig. 82 600 - 11S / 19S / 24S / 24C:
checking the motorised head for correct operation
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
1