Troubleshooting
3
Subject to modifications resulting from technical improvements!
Buderus Ltd. • http://www.buderus-domestic.co.uk
Servicing manual for wall-mounted condensing gas boiler 600 Series 11S/19S/24S/24C • Issued 02/2006
65
3.1.33 Replacing the three-way valve
z
Shut the servicing cock and drain the
600 Series 11S / 19S / 24S / 24C as per the "Installation
and Servicing Instructions".
z
Dismantle condensate trap.
z
Remove protective cap from three-way valve.
z
Remove bottom insulation from internal hot-water reservoir
(applies to 600 serie 24 C only).
z
Push in catch on motorised valve head and remove
bayonet connector by twisting anticlockwise.
z
Remove motorised head.
z
Loosen the 3 compression nuts (fig. 87).
z
Remove three-way valve and fit new unit.
z
Tighten the 3 compression nuts.
z
Fit motorised valve head and lock into place by twisting the
bayonet connector.
z
Reconnect the cable plug.
z
Connect the system to the power supply, set the mains
switch to “
I
” and press the “reset” button.
Fig. 87 600 Series 11S / 19S / 24S / 24C:
Replacing the three-way valve
A
B
AB
NOTE
Replace the three-way valve only if leaking
occurs on the screw-in pipe connectors.
A
: Mains water,
B
: Heating,
AB
: Boiler feed line
NOTE
Open servicing cocks, fill the 600 Series 11S /
19S / 24S / 24C and purge the system of air as
indicated in the installation and servicing
instructions.
