Technical data

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5584 069 - 05
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Installation
Venting Options - Stainless Steel / PP
Single Pipe System - Vertical / Horizontal Installations
Maximum allowable equivalent length - Stainless steel / PP
Multiple Boiler Installations
Boiler Models CM2 400, 500, 620, and 620 TX
Flue gas in. (mm)
combustion air in. (mm)
10 (250)
8 (200)
10 (250)
10 (250)
12 (305)
12 (305)
Max. equivalent length
a+b [ft. (m)] 200 (60)
Contact Viessmann for vent length calculation
Note: If flexible vent or air-intake pipe are used, the total max. equivalent length will be reduced by 25% [150 ft. (45 m)].
Horizontal vent termination
Vertical vent termination
4 in. min.
(100 mm min.)
6 in. min. (150 mm min.)
36 in. min.
(915 mm min.)
Note: 36 in. (915 mm) minimum distance apart for
vent terminations.
Top view