ULC ANSI/CAN/UL/ULC 2775:2020 Standard for Fixed Condensed Aerosol Extinguishing System Units

Preface

This is the Second Edition of the ANSI/CAN/UL/ULC 2775, Standard for Fixed Condensed Aerosol Extinguishing System Units.

UL is accredited by the American National Standards Institute (ANSI) and the Standards Council of Canada (SCC) as a Standards Development Organization (SDO). ULC Standards is accredited by the Standards Council of Canada (SCC) as a Standards Development Organization (SDO).

This Standard has been developed in compliance with the requirements of ANSI and SCC for accreditation of a Standards Development Organization.

Annexes A and B, identified as normative, form a mandatory part of this Standard.

This ANSI/CAN/UL/ULC 2775 Standard is under continuous maintenance, whereby each revision is approved in compliance with the requirements of ANSI and SCC for accreditation of a Standards Development Organization. In the event that no revisions are issued for a period of four years from the date of publication, action to revise, reaffirm, or withdraw the standard shall be initiated.

In Canada, there are two official languages, English and French. All safety warnings must be in French and English. Attention is drawn to the possibility that some Canadian authorities may require additional markings and/or installation instructions to be in both official languages.

This Second Edition Joint American National Standard and National Standard of Canada is based on, and now supersedes, the First Edition of UL 2775 and the First Edition of ULC/ORD-C2775-12.

Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in UL’s On-Line Collaborative Standards Development System (CSDS) at http://csds.ul.com.

Requests for interpretation of this Standard should be sent to ULC Standards. The requests should be worded in such a manner as to permit a "yes” or "no” answer based on the literal text of the requirement concerned.

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This Edition of the Standard has been formally approved by the UL Standards Technical Panel (STP) on Extinguishing Systems, STP 300.

This list represents the STP 300 membership when the final text in this standard was balloted. Since that time, changes in the membership may have occurred.

1 Scope

1.1 These requirements cover the construction and operation of fixed condensed aerosol extinguishing system units inclusive of aerosol generating extinguishing system units and aerosol generating automatic

extinguisher units intended for total flooding applications when installed, inspected, tested, and maintained in accordance with the Standard for Fixed Aerosol Fire Extinguishing Systems, NFPA 2010 and the National Fire Code of Canada.

1.2 Aerosol generating automatic extinguisher units do not have a manual means of operation, and are not intended:

a) For use as a general substitute for aerosol generating extinguishing system units; or

b) For protection of fire risks larger than those specified in the installation instructions for a single unit by using multiple units.