Checking The Ionisation Current; Matching The Cylinder Volume That Can Be Heated - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Further details regarding the individual steps

Checking the ionisation current

A Adaptor cable (available as acces-
sory)

Matching the cylinder volume that can be heated

The cylinder volume that can be heated by the compact boiler can be reduced in
favour of heating by solar collectors. For this, change the position of the three-
way valve.
Commissioning, inspection, maintenance
(cont.)
1. Pull the cable off and connect test
equipment (adaptor cable available
as accessory).
2. Adjust the upper output.
Press K and d simultaneously
for at least 2 s.
With a/b in the display, select
"Full load".
Note
The minimum ionisation current
should be at least 4 µA as soon as
the flame builds (approx. 2 3 s
after opening the gas train).
3. Ionisation current < 4 µA:
Check the electrode gap, see
page 38.
Check the control unit power sup-
ply.
4. After testing, press d.
5. Record the actual value in the ser-
vice report.
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