Adjusting The Oil Pressure And Checking The Vacuum - Viessmann Vitoplus 300 Service Instructions Manual

Further details regarding the individual steps
Rated output
(see page 18)
!
Please note
An incorrectly adjusted nozzle gap "a" can result in irregular operation of
the burner and even a fault shutdown.
Always maintain the stated dimension and check in accordance with the
details on page 18.

Adjusting the oil pressure and checking the vacuum

Oil pump; make: Danfoss,
type BFP 52
Initial start-up, inspection, maintenance
kW 12.9/19.3
1. Insert the pressure gauge (range
2. Start the boiler.
3. Press K and d simultaneously
4. Select burner stage 1 with a and
5. Where vacuum measures higher
(cont.)
16.1/23.5
0 - 25 bar) into test port "P"A and
the vacuum gauge (range 0 -
1 bar) into test port "V"B.
Note
Seal the pressure and vacuum
gauges only with copper or alumi-
nium gaskets or with O-rings.
Never use tape to seal these
joints.
for approx. 2 s.
"Relay test" is shown in the dis-
play.
b.
"Burner st 1 ON" is shown on the
display.
than 0.35 bar, check the filter for
contamination or check the pipe
route.
13