Vitorond 200, VD2 Series 320 to 1080 Installation
5285 429 - 03
34
Burner
Burner Installation
(continued)
Fully modulating burner
When the Vitorond 200, VD2 is operated with a fully
modulating burner, the minimum boiler water temperature
is as follows:
Oil-fired burner. . . . . . . . . . . . . . . . . . . .140°F (60°C)
Gas-fired burner. . . . . . . . . . . . . . . . . .. 149°F (65°C)
Return water temperature elevation must be adjusted
to a minimum temperature of 129°F (54°C).
Model
Flue gas resistance
mbar
“w.c.
VD2-320
0.50
0.20
VD2-380
0.90
0.35
VD2-440
1.30
0.51
VD2-500
1.70
0.67
VD2-560
1.90
0.75
VD2-630
2.10
0.83
VD2-700
2.80
1.10
VD2-780
3.90
1.54
VD2-860
4.90
1.93
VD2-950
4.50
1.77
VD2-1080
6.72
2.70
Model
Input
Input
Min.1-stage
input
Min.1-stage
input
Oil
MBH
Gas
MBH
Oil
MBH
Gas
MBH
VD2-320
1255
1300
753
780
VD2-380
1490
1544
895
926
VD2-440
1726
1787
1036
1072
VD2-500
1961
2031
1177
1219
VD2-560
2196
2275
1318
1365
VD2-630
2471
2559
1483
1535
VD2-700
1745
2843
1647
1706
VD2-780
3059
3168
1835
1901
VD2-860
3373
3493
2024
2096
VD2-950
3727
3860
2236
2316
VD2-1080
4236
4387
2542
2632
Weishaupt burners / Riello burners
A Vitorond 200, VD2 boiler with a high-performance gas
burner installed can achieve a combustion efficiency
of up to 85%, and up to 88% if equipped with a #2 oil
burner as follows:
Gas-fired
10% volume CO
2
, 280°F (138°C) net stack temperature,
CO in ppm < 50
Oil-fired
13% volume CO
2
, 300°F (149°C) net stack temperature,
smoke spot 0 - 1 (on the Bacharach Scale)
The maximum input published for each boiler size must
not be exceeded.
Vitorond 200, VD2 with Viessmann Vitotronic controls
To further protect the Vitorond 200, VD2 from dew-point
corrosion, the following minimum inputs on a 2-stage
burner must be adjusted for the first stage when the
boiler is used in conjunction with a Viessmann Vitotronic
controls, and when operating with modulating boiler
water temperatures.
See separate instructions supplied
with the burner.
Under partial load conditions, a minimum flue gas
temperature must be met. How high that minimum
flue gas temperature must be depends largely on the
configuration of the chimney insulation and height
of the chimney; however, it should be a minimum
of 248°F (120°C).
Two-stage burner
With a two-stage burner, when the boiler water
temperature falls below the minimum 140ºF (60ºC),
the burner automatically switches to the second stage
(full input) to protect the boiler from the effects of
dew-point condensation, i.e. condensation/corrosion.
In order to provide this protection, the burner must not
be limited to first stage operation during the summer
months.
System Preparation
(continued)
See separate instructions supplied with the
burner. The maximum input published for each
boiler size must not be exceeded.