CSA ANSI Z21.13:22/CSA 4.9:22

Preface 

This is the seventh edition of CSA/ANSI Z21.13 CSA 4.9, Gas-fired low-pressure steam and hot water boilers . It supersedes the previous editions published in 2017, 2014, 2013, 2010, 2004, and 2000. The major changes to this edition include the following: a) updated the reference publications; b) deleted coverage for manufactured and mixed natural gases; c) addition of coverage for boilers designed for installation in a recreational vehicle (RV), as well as boilers having a 12 VDC power supply; d) replacement of the term "input rating" with "maximum input rating" or "minimum input rating", as appropriate, to clarify requirements applicable to boilers having more than one input rating; e) elimination of the 5 000 000 BTU/h input rating limit on the use of direct ignition systems for some types of boilers (Clause 4.8.2); f) removal of the requirement that a manually operated shut-off valve be present downstream of the safety shut-off valves on boilers having a maximum input rating over 400 000 BTU/h (note that a means of testing the safety shut-off valves is still required) (Clause 4.10); g) added an appliance pressure regulator requirement for recreational vehicles convertible boilers (Clause 4.10.7); h) added construction and performance requirements for corrugated metal tubing used as gas conduit (Clauses 4.11.11 and 5.31); i) modified requirements for nonferrous semi-rigid tubing used as gas conduit (Clause 4.11.11); j) removed references to Type T wire (Clause 4.23.1); k) revisions to safety circuit wiring requirements (Clause 4.23.10); l) addition of a requirement for language in both in installation and user’s manuals requiring the boiler installer to verify that at least one carbon monoxide alarm has been properly installed when a boiler is installed inside a residential living space (Clauses 4.33.1 and 4.34); m) clarification of requirements for flame illustrations in the installation manual (Clause 4.33.1); n) clarification that a Class IIA-1 labeling system (metal plate secured by mechanical means) is to be used for rating plates that are shipped detached (Clause 4.35.2); o) added detailed method for input measurement and also excepted boilers with negative pressure regulators from manifold pressure tolerance requirement (Clause 5.3.3 and Annex J); p) modified requirements for adjustment of minimum test input rate (Clause 5.3.4); q) clarified when input rate should be verified, and when adjustments should be made, during the course of testing (Clause 5.3.5); r) added an equation for the calculation of air-free carbon monoxide level and defined ultimate CO2 values to use in these calculations (Clause 5.5.1.1); s) various changes to burner operating characteristics performance requirements, intended to improve clarity. This includes clarification that tests at 1/3 of maximum input rating only apply to boilers having a manual valve, downstream of the inlet test pressure location, that can be set to a position other than fully open or fully closed (Clause 5.6); t) clarified that flame roll-out shut-off construction requirement does not apply to boilers having a sealed combustion chamber which inherently prevents rollout. Option of performing the flame rollout shut-off test by disconnecting the motor on an induced draft boiler has also been eliminated (Clauses 4.1.6 and 5.10); u) eliminated "equivalent CO" calculations in blocked vent, blocked inlet, and blocked condensate drain tests for boilers having a minimum input rating less than 20% of their maximum input rating. These calculations were unnecessary, given the 1000 PPM air-free limit at minimum input rating for such boilers (Clauses 5.23.2.3, 5.25.6.2.3, and 5.28.2.2); v) modified wind test performance requirements for boilers other than those supplied with a power burner or operating under forced or induced draft (Clauses 5.25.5.1 and 5.27.5.1); w) added manufacturing and production test requirements for corrugated metal tubing used as gas conduit (Clause 6.4); and x) elimination of flue loss calculation coverage and AFUE requirements. Measurement of boiler efficiency is covered by other standards. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. This Standard was prepared by the Z21/CSA Joint Subcommittee on Standards on Gas-Fired Low- Pressure Steam and Hot Water Boilers under the jurisdiction of the Technical Committee on Gas Appliances and Related Accessories, the Z21/83 Technical Committee on Performance and Installation of Gas-Burning Appliances and Related Accessories, and the Fuels and Appliances Strategic Steering Committee, and had been formally approved by the Technical Committees and the Interprovincial/Territorial Gas Advisory Council. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has b

Product Details

Edition:

7th

Published:

08/11/2022

ISBN(s):

9781488341953

Number of Pages:

231

File Size:

1 file , 4.2 MB

Product Code(s):

2429910, 2429910

Note:

This product is unavailable in Russia, Ukraine, Belarus

Document History

CSA ANSI Z21.13:22/CSA 4.9:22

CSA ANSI Z21.13-2017/CSA 4.9-2017

CSA ANSI Z21.13-2014/CSA 4.9-2014

CSA ANSI Z21.13-2013/CSA 4.9-2013

CSA ANSI Z21.13-2010/CSA 4.9-2010

CSA ANSI Z21.13-2004/CSA 4.9-2004

CSA ANSI Z21.13A-2002/CSA 4.9A-2002

CSA ANSI Z21.13-2000/CSA 4.9-2000

CSA ANSI Z21.13-1991