Check Combustion Air Supply; Check Vent System; Calibrate Burner; Two-Stage Burner - Viessmann VITOROND 200 Service Instructions Manual

Inspection and Maintenance

Check Combustion Air Supply

Check Vent System

Calibrate Burner

14
Vitorond 200, VD2A Series Service
Ensure an adequate supply of combustion and ventilation
air is available. If an outside air duct is required, ensure it
is installed.
Note: See subsection entitled "Combustion air supply"
in the Installation Instructions.
Ensure that nothing is obstructing the flow of combustion
and ventilation air and no chemicals, garbage, gasoline,
combustible materials, flammable vapors and liquids are
stored (not even temporarily) in the vicinity of the boiler.
Ensure proper operation of the barometric draft regulator
(barometric damper).
Note: See Installation Instruction
Supplement for Barometric Draft Regulator.
See separate instructions supplied with the burner.
The maximum input published for each boiler size must
not be exceeded.

Two-stage burner

With a two-stage burner, when the boiler water
temperature falls below the minimum 140º F (60º C), 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.

Model

VD2A-125
VD2A-160
VD2A-195
VD2A-230
VD2A-270

Flue gas resistance

mbar "w.c.
0.65 0.26
0.95 0.38
1.0 0.40
1.2 0.48
1.6 0.64