Viessmann VITOCAL 160-A - Form for calculating the total pressure drop in the extract;expelled air pipework

8.2 Form for calculating the total pressure drop in the extract/expelled air pipework
Determining the total pressure drop for design flow rate
Pressure drop, expelled air roof outlet: Pa
(determine in accordance with the flow rate according to the diagram on page 28)
Pressure drop from the expelled air connector on Vitocal 160-A to the blow-off point: Pa
(from the table on page 32)
Highest pressure drop – section from the extract air valve to the Vitocal 160-A: Pa
(from the table on page 32, when using a valve add 10 Pa as rough estimate)
Estimated total pressure drop – extract air/expelled air: Pa
Assessment
Pressure drop – extract air/expelled air line: Pa < 95 Pa: permissible
> 95 Pa: Modify the air duct system (cross-section, length)
Appendix
(cont.)
VITOCAL 160-A
VIESMANN
33
5822 485 GB
8