CSA 2.3-2016 pdf download – Gas-fired central furnaces.
With the onset of the Free Trade agreement between the United States and Canada on January 2, 1988, significant attention was given to the harmonization of the United States and Canadian safety standards addressing gas-fired equipment for residential, commercial, and industrial applications. It was believed that the elimination of the differences between the standards would remove potential trade barriers and provide an atmosphere in which North American manufacturers could market more freely in the United States and Canada. The harmonization of these standards was also seen as a preliminary step toward harmonization with international standards, which was to become a necessity as Europe moved toward its goal to form an economic United States of Europe (EC) by early 1990’s. A Z21/CGA joint working group on harmonizing central furnace standards was established. On May 4, 1989, the joint working group reviewed an initial comparison of the construction sections of the Standard for Gas-Fired Central Furnaces (Except Direct Vent Central Furnaces), ANSI Z21.47-1987, and the National Standard of Canada, CAN/CGA-2.3-M86. It was agreed that a consultant should be used to draft a complete unitary standard to address gas-fired central furnaces, including direct vent central furnaces. As a result, several drafts, based on the current Standards for Gas-Fired Central Furnaces (Except Direct Vent Central Furnaces) (ANSI Z21.47-1990 and Z21.47a-1990, ANSI Z21.64-1990, and CAN/CGA 2.3-M86) were subsequently developed by the consultant and reviewed by the joint working group between 1989 and 1991.
A joint Z21/CGA Joint Subcommittee on Standards for Gas-Fired Central Furnaces was then established, based on memberships of the Z21 Subcommittee on Standards for Gas-Fired Central Furnaces and the CGA 2.3-2.9 Committee on Standards for Central Furnaces, Duct Furnaces, and Unit Heaters. Membership encompasses representatives from the U.S. and Canadian manufacturing industry, gas suppliers (natural and LP), regulatory authorities and general interest with the intent that each country is equally represented. The first meeting of the Z21/CGA Joint Central Furnace Subcommittee was held on July 10-12, 1992. At that meeting a third draft of a harmonized central furnace standard was considered and modified. A fourth draft was subsequently adopted for industry review during November 1991. With the formation of joint subcommittees, a Canadian Gas Association Standards Steering Committee on Gas Burning Appliances and Related Accessories was established to parallel Accredited Standards Committees Z21 and Z83. Also, to support the formation of joint subcommittees, operating procedures, in accordance with American National Standards Institute procedures, for joint subcommittees were developed and subsequently approved by ANSI on April 1, 1993. Following reconsideration and modification of the proposed draft standard for gas-fired central furnaces in light of comments received, the joint central furnace subcommittee, at its February 11-13, 1992 meeting, recommended the proposed fourth draft to the Z21 Committee and the CGA Standards Steering Committee for approval.
The first edition of the harmonized Standard for Gas-Fired Central Furnaces , ANSI Z21.47/CGA 2.3 incorporated coverage from the Standard for Direct Vent Central Furnaces, ANSI Z21.64, coverage for recreational vehicle central furnaces, and central furnaces for outdoor installation. The first edition of the harmonized standard was approved by the Standards Advisory Committee and the Standards Council of Canada on March 31, 1993, and by the American National Standards Institute, Inc., on May 26, 1993. At their respective meetings on April 10 and April 11, 1996, and by letter ballot dated May 16, 1996, members of the Z21 Accredited Standards Committee and the Z83 Accredited Standards Committee unanimously approved the merger of the two committees. By letter ballot dated October 8, 1996, the members of the Z21 Committee and the Z83 Committee unanimously approved the title and procedures of the new committee as Accredited Standards Committee Z21/83 on Performance and Installation of Gas-Burning Appliances and Related Accessories. The Z21/83 Committee, at its April 17, 1997 meeting, approved proposed revisions to the harmonized central furnace standard. The Canadian Standards Steering Committee concurred with the actions of the Z21/83 Committee and approved the proposed revisions to the harmonized central furnace standard. The second edition of the harmonized central furnace standard was approved by the Interprovincial Gas Advisory Council on December 21, 1998, and the American National Standards Institute, Inc. on June 9, 1998. The third edition of the harmonized central furnace standard was approved by the Interprovincial Gas Advisory Council on September 4, 2001, and the American National Standards Institute, Inc. on September 27, 2000.CSA 2.3-2016 pdf download.
