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An engineering firm has insisted that a waterflow activation shutdown the HVAC system and cited NFPA 90A: A.6.4.3.
A.6.4.3 Where automatic water sprinklers are provided and zoned to coordinate with the HVAC zones, their water flow switches should initiate devices for the functions described in Chapter 6. Each floor of the building has one HVAC zone and one sprinkler zone (floor control valves). The HVAC system has the appropriate duct detectors and functions. The only instance I have experienced using flow switches for HVAC control is when there is no automatic smoke detection and the flow switch is used to start the smoke control system for that zone. What are your thoughts? Is a waterflow switch required to shutdown an HVAC system on this premise? Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
8 Comments
We have a project with a comment from the AHJ stating that the dryer vent cannot terminate to the exterior condominium wall, which is the egress wall for the condominium exit exterior breezeway on that floor.
We're under NFPA 101 (regarding Section 30-3.6.3 for Unprotected Openings). Is a duct penetration considered an unprotected opening? Dry vents cannot have fire/smoke dampers, so can it just be a metal duct? Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe |
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