Viessmann VG III - Adjusting stage 2; Adjusting stage 1

13
Initial start-up, inspection and maintenance
Further details regarding the individual steps (cont.)
Please note:
Never turn the pressure regulator
outside its setting range. Turn set
screw F only as long as the nozzle
pressure noticeably changes.
Main volume butterfly D should be
turned fully to "+".
Adjusting stage 2
Please note:
Start the burner in stage 2. To do
this, activate the emissions test
switch on the control unit. Service
switch B must be in position II.
ĂĂ7. Move the cover over both sides
of adjusting screw Fā.
ĂĂ8. Adjust the nozzle pressure on
adjusting screw F using a screw
driver.
ĂĂ9. Record the actual values in the
commissioning report on page 50.
Adjusting stage 1
10. Switch the burner over to stage 1
by pulling plug lÖ.
11. Unscrew locking screw C b turn,
but do not remove.
12. Adjust the nozzle pressure at
part-volume choke adjusting
screw E.
13. Record the actual values in the
commissioning report on page 50.
5692Ă534ĂGB