Viessmann Vitorond 200 VD2 1080, Service Instructions Manual

Page: 13 / 32

13
Initial start-up, inspection and maintenance
Further details regarding the individual steps
(cont.)
Burner adjustment
Burner service instructions or separate documentation from the
burner manufacturer
Adjust the highest oil or gas
throughput of the burner to the rated
boiler output.
To protect the system against dew
point corrosion, the 2
nd
Ăburner stage
(full capacity) must be set to the rated
boiler output and must not be
switched OFF during the summer
months (2
nd
Ăburner stage on
constant standby).
Operation with burner loadĂ y Ă60
Ă
%
For oil fired operation, the minimum
boiler water temperature is 50Ă º C and
for gas fired operation 60Ă º C.
Adjust the return temperature raising
facility at least to 40Ă º C (oil fired
operation) or to 53Ă º C (gas fired
operation).
To protect the boiler, the minimum
output in the base load stage is set to
60
Ă
% of rated output.
Rated
output
kW
Minimum output
(to be set)
(1
st
Ăburner stage)
kW
ă320
ă380
ă440
ă500
ă560
ă630
ă700
ă780
ă860
ă950
1080
192
228
264
300
336
378
420
468
516
570
648
A minimum flue gas temperature is
required for the base load stage,
whose value is subject to the
chimney design.
Operation with burner loadĂ<Ă60
Ă
%
For oil fired operation, the minimum
boiler water temperature is 60Ă º C and
for gas fired operation 65Ă º C.
Adjust the return temperature raising
facility at least to 53Ă º C.
Set the minimum heating output for
the base load stage according to the
chimney conditions. Note that the
chimney must be suitable for the low
flue gas temperatures which may
arise.Ă
5692Ă517ĂGB