In one of our project with US Navy, our consultant ask us to install the Access Door of Fire Damper in the Upstream Side of FD? Is there any technical reason, Refer the attached detail.
You have to provide access for any maintenance, replacement, or testing required.
Hai, Yes, I do agree there is a requirement for future Maintenance. But it's a specific requirement to install the damper in the upstream side of the fire damper?
Interesting question. Maybe the consultant is following the fire damper manufacturer's installation instructions. Is this something the certified manufacturer's listing of the fire damper installation required? I have seen them on both sides of the damper. So when there is an inspection to verify compliance, the access to the damper must be installed in accordance the manufacturer's instructions.
The consultant referring to NFPA 90A, but I checked the document there's no such statement. I checked the manufacturer requirement, and they recommend to install the access door subject to damper the notch of the FD. Do you have any idea about UL 555 requirement? Does it recommend the Damper installation method?
To answer both your questions, scope of the UL standard: UL - 555 Standard for Fire Dampers | Standards Catalog
I would a request for information related to this situation from your consultant. Otherwise, by contract you may be placing the access door where the parts are inaccessible for testing and repairs.
Does it have a fusible link or motor??
if so which side is it on??
You wrote: "The consultant referring to NFPA 90A, but I checked the document there's no such statement."
As I think differently, this deserves a comprehension look at the NFPA codes.
Yes there is. The core section 9.2 of NFPA 101 for the HVAC systems, would require compliance to NFPA 90A for the requirements in subsection _.5 each individual or combined occupancy chapters. The 2018 NFPA 90A requires compliance with the 2016 NFPA 80 in Section 5.4.7 which requires access for the installation of fire dampers in accordance with section 19.2.3 of NFPA 80.
Excerpt from 2016 NFPA 80:
Section 19.2.3 does not have requirements for access to the fire dampers for serviceability. It just says the dampers with fusible links, internal operators. or both must have an access door or a removable section of the duct. However, when the installed accesses do not permit the operational tests and maintenance of the fire dampers, they will be in violation of Sections 19.3 Operation Test, 19.4 Acceptance Testing, 19.5 Periodic Testing, and 19.6 Maintenance of 2016 NFPA 80. I have cited these sections dozens of times because the facility plan managers said the access was not enough to allow the required tests and maintenance.
Doing otherwise would be an opinion on my part, not a code/standards requirement.
Upstream may be for cleaning of the duct work and damper also
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