Standard 726, Edition 7
UL 726

Standard for Oil-Fired Boiler Assemblies

UL Bulletin Edition 7 Published Date: February 27, 2009 Last Revision: October 12, 2023


Summary of Topics m0296_10_20090227_sum.html

Subject 296 (295, 296A, 307A, 307B, 726, 727, 729, 730, 731, 732, 733, 795,896, 2096,2106)

Bulletin Dated: February 27, 2009


The following topics were discussed at the meeting of the Standards Technical Panel for Furnaces and Heating Equipment:

1. International Harmonization

2. Updated requirements for controls

3. Combined requirements of ANSI/UL 372, ANSI Z21.20, CSA C22.2 No. 199

4. Specification of biodiesel and impact to oil-fired burners and appliances

5. Non-metallic venting systems and components

6. Proof of closure requirements for commercial oil-fired heating appliances

7. Removal of burner requirements from UL 795, allowing reference to ANSI/UL 295

8. Exceptions for required manual (test) valve downstream of electrical safety shutoff valves for particular constructions/designs of combustion systems, such as premix burner systems

9. Criteria for motor protection with Variable Frequency Drives (VFDs) used in combustion systems

10. General evaluation of VFDs used in combustion systems

11. Criteria for PLC evaluation within combustion systems

12. Markings on burner for timings (former Group designations of UL 372)

13. Recycling of burners over 2,500,000 btu input

14. Flexible nonmetallic cable

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