Viessmann Vitodens 200, Service Instructions Manual

Page: 21 / 116

21
Initial start-up, inspection and maintenance
Further details regarding the individual steps
(cont.)
Checking the ionisation current
¨ ĂSafety instruction
Switch OFF the system ON/OFF switch on the control unit before connecting
the test equipment.
1. Connect the test equipment acc. to
the diagram.
2. Start up the boiler set to the higher
rated output:
Set emission test switchĂ" S " on
the control unit to " h ".
The minimum ionisation current
should be at least 5Ă m A as soon as
the flame is established (approx.
2
Ă
Ć
Ă
3Ăseconds after opening the gas
combination valve).
3. If the ionisation current is <Ă5Ă m A
H check the electrode gap
(see pageĂ18);
H check the control unit power
supply.
4. Set the emissions test switch after
the test to " a ".
5. Record the actual value in the
service report.
5692Ă485
G
B