Technical information

15
5354 789 - 01
Vitorond 200, VD2A Series Service
Weishaupt / Riello burners
A Vitorond 200, VD2A boiler with a high-performance
gas burner can achieve a combustion efficiency of up to
85.2%, and up to 87.9% if equipped with a #2 oil burner.
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 cannot
be exceeded.
Vitorond 200 with Viessmann boiler controls
To further protect the Vitorond 200, VD2A 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 boiler control and when operating with
modulating boiler water temperatures.
Model Input Input Min. 1-stage
input
Min. 1-stage
input
Oil
MBH
Gas
MBH
Oil
MBH
Gas
MBH
VD2A-125 490 508 294 305
VD2A-160 628 650 377 390
VD2A-195 765 792 459 475
VD2A-230 902 934 541 560
VD2A-270 1059 1096 635 658
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, venting material
and venting category (I or III), and height of the chimney.
Refer to the Installation Instructions for Oil
Door Safety Switch
Calibrate Burner (continued)
Check Proper Operation of Door Safety Switch (oil burners only)
Refer to the Installation Instructions for
Oil Door Safety Switch
Inspection and Maintenance