Buderus 600 - 11S Installation And Servicing Instructions page 57

Servicing
5.3.24 Replacing the motorised valve body control valve
Shut the servicing valve and drain the
600 - 11S / 19S / 24S / 24C as per the "Installation and
Servicing Instructions".
Dismantle condensate trap.
Remove protective cap from three-way valve.
Remove bottom insulation from internal hot-water reservoir
(applies to 600 - 24 C only).
Push in catch on regulating motor and remove bayonet
connector by twisting anticlockwise.
Remove regulating motor.
Remove the control valve with a spanner and fit a new unit
(fig. 83).
Fit regulating motor and lock into place by twisting the
bayonet connector.
Reconnect the cable plug.
NOTE
Open servicing valves, fill the 600 - 11S / 19S /
24S / 24C and purge the system of air.
Set the mains switch to "I" and press the "reset" button.
5.3.25 Replacing the three-way valve
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
Shut the servicing valve and drain the
600 - 11S / 19S / 24S / 24C as per the "Installation and
Servicing Instructions".
Dismantle condensate trap.
Remove protective cap from three-way valve.
Remove bottom insulation from internal hot-water reservoir
(applies to 600 - 24 C only).
Push in catch on motorised valve head and remove
bayonet connector by twisting anticlockwise.
Remove motorised head.
Loosen the 3 compression nuts (fig. 84).
Remove three-way valve and fit new unit.
Tighten the 3 compression nuts.
Fit motorised valve head and lock into place by twisting the
bayonet connector.
Reconnect the cable plug.
Subject to modifications resulting from technical improvements!
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 05/2004
Fig. 83 600 - 11S / 19S / 24S / 24C:
replacing the control valve
Fig. 84 600 - 11S / 19S / 24S / 24C:
replacing the three-way valve
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
5
A
AB
B
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