Servicing
5
56
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
5.3.24 Replacing the motorised valve body control valve
z
Shut the servicing valve and drain the
600 - 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 - 24 C only).
z
Push in catch on regulating motor and remove bayonet
connector by twisting anticlockwise.
z
Remove regulating motor.
z
Remove the control valve with a spanner and fit a new unit
(fig. 83).
z
Fit regulating motor and lock into place by twisting the
bayonet connector.
z
Reconnect the cable plug.
z
Set the mains switch to “
I
” and press the “reset” button.
5.3.25 Replacing the three-way valve
z
Shut the servicing valve and drain the
600 - 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 - 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. 84).
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.
Fig. 83 600 - 11S / 19S / 24S / 24C:
replacing the control valve
NOTE
Open servicing valves, fill the 600 - 11S / 19S
/ 24S / 24C and purge the system of air.
Fig. 84 600 - 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 flow line
NOTE
Open servicing valves, fill the 600 - 11S / 19S
/ 24S / 24C and purge the system of air.