Technical data

47
5584 069 - 05
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Installation
Venting Options - Stainless Steel / PP
Two Pipe System - Vertical Exhaust / Horizontal Air Intake
Flue
Air
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 (300)
8 (200)
12 (300)
12 (300)
Max. equivalent length
a+b [ft. (m)] 200 (60)
Contact Viessmann for vent length calculation
Maximum allowable equivalent length - Stainless steel / PP
Two Pipe System - Vertical / Horizontal Installations
Note: If flexible vent or air-intake pipe are used, the total
max. equivalent length will be reduced by 25%
[150 ft. (45 m)]
a - Equivalent length (exhaust)
b - Equivalent length (air intake)
Note: See table below.