Buderus Logano GE434 Maintenance Instructions Manual page 30

6 Heating system start-up
2. Check the ionisation current:
PLEASE NOTE
We recommend the use of an ionisation
lead set from Buderus.
! Disconnect the heating system from the mains
electrical supply, e.g. emergency stop switch of the
heating system upstream of the boiler room.
! Connect the test equipment (Fig. 12, Item 1) in
series to the contacts of the split plug-in connector of
the monitoring lead (Fig. 12, Item 3).
! Fit the contact protector (Fig. 12, Item 4) around the
plug-in connector.
! On the test equipment (Fig. 12, Item 1), select
DC.
! Reconnect the heating system to the mains electrical
supply and test the ionisation current. Record the
value in the commissioning report (page 33).
Perfect operation requires an ionisation current of at
µ
least 2 A when the pilot light burns without the main
flame being ON. A fault shutdown occurs at approx.
µ
1 A.
PLEASE NOTE
During maintenance work, also check the
ionisation current when both the pilot light
and the main flame are ON.
! Disconnect your heating system from the mains
electricity supply.
! Remove the test equipment.
! Plug the monitoring lead plug-in connector (Fig. 12,
Item 3) into its mating part again.
! Refit the contact protector (Fig. 12, Item 4) to the
monitoring lead (Fig. 12, Item 5).
! Reconnect the heating system to the electrical mains
supply.
We reserve the right to make any changes due to technical modifications.
Commissioning and maintenance instructions Logano GE434 Gas-fired special boiler • Issue 02/2003
30
4
3
µ
A
Fig. 12 Checking the ionisation current
Item 1: Test equipment
Item 2: Ionisation lead set
Item 3: Monitoring lead plug-in connector
Item 4: Contact protector
Item 5: Monitoring lead
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
5
4
2
1