UL 731:6ED 2018-01-31
Current
The latest, up-to-date edition.
Oil-Fired Unit Heaters
Hardcopy
English
31-01-2018
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Foreword
Introduction
1. Scope
2. Glossary
3. Components
Construction
4. Assembly
5. Burners
6. Accessibility for Servicing
7. Disposal of Combustion Products
8. Base
9. Casing
10. Radiation Shields and Materials in Air-Handling
Compartments
11. Air Filter
12. Combustion Chamber
13. Radiator
14. Heating Surface Joints
15. Baffles
16. Flue Collar
17. Damper and Draft Regulator
18. Controls
19. Field Wiring
20. Internal Wiring
21. Separation of Circuits
22. Bonding for Grounding
23. Electrical Components - General
24. Mounting of Electrical Components
25. Electrical Enclosures
26. Motors and Motor Overload Protection
27. Overcurrent Protection of High-Voltage Control-
Circuit Conductors
28. Overcurrent Protection of Transformers
29. Switches and Controllers
30. Capacitors
31. Electrical Insulating Material
32. High-Voltage Circuits Spacings
33. Low-Voltage Circuits Spacings
Protection of Users and Service Personnel
34. General
Performance
35. General
36. Test Installation - Floor-Mounted Heaters
37. Test Installation - Suspended Type Heaters
38. Instrumentation
39. Initial Test Conditions
40. Combustion Test - Burner and Heater
41. Continuous Operation Tests
42. Limit Control Cutout Test
43. Continuity of Operation Test
44. Temperature Test
45. Continuous Operation Temperatures
46. Fan Failure Test
47. Stalled Fan Motor Test
48. Blocked Inlet Test
49. Short Circuit Test
50. Overload Test, High-Voltage Transformers
51. Burnout Test, High-Voltage Transformers
52. Dielectric Voltage-Withstand Test
Manufacturing and Production Tests
53. General
Marking
54. General
Installation Instructions
55. General
Appendix A
Standards for Components
This revision of ANSI/UL 731 dated November 11, 2021 is being issued to update the title page to reflect the most recent designation as a Reaffirmed American National Standard (ANS).
| DevelopmentNote |
NEW CHILD REV 1 2021 IS NOW ADDED
|
| DocumentType |
Standard
|
| Pages |
0
|
| ProductNote |
NEW CHILD REV 1 2021 IS NOW ADDED
|
| PublisherName |
Underwriters Laboratories
|
| Status |
Current
|
1.1 These requirements apply to oil-fired unit heaters as defined herein.
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