Two Pipe System-Vertical Exhaust/Vertical Air Intake - Viessmann Vitocrossal 200 Installation Instructions Manual

Venting Options - Stainless Steel / PP
Two Pipe System - Vertical Exhaust / Vertical Air Intake
The vent diameter of CM2 boilers can be reduced to 6" (150 mm) nominal vent size. See the following table for max.
vent length applicable to vent reduction diameter.
Model Reduced Flue
vent
CM2-186 6" (150 mm)
CM2-246 6" (150 mm)
CM2-311 6" (150 mm)
44
Flue
Air-intake
to pipe
7 7
6" (150 mm)
6" (150 mm)
6" (150 mm)
Vitocrossal 200 CM2 186 to 311 Installation
Air
a - Equivalent length (exhaust)
b - Equivalent length (air intake)
Max. Flue vent Max. Air-intake
length "a" pipe length "b"
85 ft. (26 m)
Can not be reduced (See tables on page 41, 43
Input derate %
65 ft. (20 m) 0