Servicing
5
58
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 28C • 01/2004
Subject to modifications resulting from technical improvements!
Boulter Buderus Ltd. • http://www.boulter-boilers.com
z
Measure the resistance of the ionisation electrode
(see fig. 92).
z
Check if the ionisation electrode has been damaged, soiled
or is shows signs of wear (see fig. 93).
z
Replace ionisation electrode if necessary and reassemble
in reverse order.
5.3.14 Checking the three-way valve for correct operation
z
Set DHW temperature knob to "0".
z
Disconnect the boiler from the mains power supply.
z
Remove the securing pin (see fig. 95, item 1) and remove
the servomotor.
z
Connect the boiler to the mains power supply.
z
Set the DHW temperature knob on the BC10 to 60 °C.
z
Open a warm water faucet.
z
Check if the servomotor of the internal three way valve is
turning to the DHW position.
z
Set the DHW temperature knob to "0".
z
Close the warm water faucet.
z
Check if the servomotor of the internal three-way valve
turns to the central heating position.
fig. 92 Measure resistance ionisation electrode
fig. 93 Check ionisation electrode
fig. 94 Checking the three-way valve for correct operation
