Vacuum Relief Damper for CM2 and CA3 Boilers

Vacuum Relief Damper

The vacuum relief damper is very simple in design. When a vacuum occurs inside the vent system (as occurs with the Joukowsky effect) and the atmospheric pressure outside of the vent exceeds the tension of the spring, the spring compresses to open a flapper. As this flapper opens, air is allowed to enter the vent system which relieves the vacuum and prevents damage to the vent and to the boiler system. The relief damper is available [for our CM2 and CA3 boilers] in a range of 5 sizes to suit a variety of commercial gas boiler vent systems.


Downloads

Product manuals

Installation, operating and service instructions

View manuals

CAD drawings

2D and 3D design files in DWG and ADSK format

View drawings

Parts catalog

Parts lists and diagrams for the Viessmann product line

View catalog

Pro center

Tools and info for heating contractors, consulting engineers and other industry professionals

More info via Pro Login

Vitospec

Engineering specifications and product submittals

Start webapp

Training Videos

Installation and service guides for contractors.

Watch videos

Technical support

Expanded telephone support for heating contractors

More info