Servicing
5
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
55
Subject to modifications resulting from technical improvements!
Buderus • http://www.buderus-domestic.co.uk
5.3.22 Replacing the ionisation electrode
z
Remove the CombiVENT air combination unit.
z
Loosen the plug-and-socket connection of the ionization
electrode.
z
Loosen screw (fig. 81, item 1) by a half-turn and slide bar
to remove.
z
Pull electrode to remove, and fit new unit.
z
Reassemble by following the above procedure in reverse.
5.3.23 Checking the three-way motorised valve for
correct operation
z
Disconnect the system from the power supply, set mains
switch to "
0
".
z
Dismantle condensate trap.
z
Remove protective cap from three-way valve.
z
Remove bottom insulation from internal hot-water reservoir
(applies to 600 - 24C only).
z
Push in catch on regulating motor and
z
Remove bayonet connector by twisting anticlockwise.
z
Remove regulating motor.
z
Set the mains switch to “
I
” and press the “reset” button.
z
Once the 600 - 11S / 19S / 24S / 24C is in operation, open
one of the hot-water taps.
The UBA displays "
=.
" for hot water. If the regulating
motor starts up (check for movement of adjusting lever),
the motorised head is working.
z
Shut the hot-water tap.
z
Set the mains switch to “
0
”.
z
If the motorised head is working, attach the regulating
motor and lock into place by twisting the bayonet
connector.
z
Connect the system to the power supply, set the mains
switch to “
I
” and press the “reset” button.
Fig. 81 Replacing the ionisation electrode
1
Fig. 82 600 - 11S / 19S / 24S / 24C:
checking the motorised head for correct operation