UL 307B:5ED 2006-10-31

FOREWORD
INTRODUCTION
1. Scope
2. General
3. Glossary
CONSTRUCTION
GENERAL
4. Assembly
5. Accessibility for Servicing
6. Air-intake Assemblies
7. Base
8. Casing
9. Radiation Shields
10. Combustion Chamber
11. Radiator
12. Heating-Surface Joints
13. Baffles
14. Flue Collar
15. Flue-Gas Outlet Assembly
16. Draft Hoods
17. Warm Air Appliance Air Handling System
18. Warm Air Handling System for Installation Downstream
     From a Cooling System
19. Materials in Air Handling Compartments of Warm Air
     Appliance
20. Water Heater Temperature-Regulating Control
21. Water Heater Storage Vessels
22. Water Heater Dip Tubes
BURNER EQUIPMENT AND CONTROLS
23. General
24. Gas Piping, Tubing and Fittings
25. Main Burner and Flame Spreaders
26. Combustion Air Supply and Control
27. Orifice Spuds and Orifice Fittings
28. Manual Valves
29. Gas Appliance Pressure Regulators
30. Gas Bleeds and Vents
31. Pilot Gas Filters
32. Control Circuits
33. Controls
34. Automatic Gas Valves
35. Automatic Gas Ignition Systems
WIRING METHODS
36. Field Wiring
37. Factory Wiring
38. Electrical Systems Rated 12 Volt DC
39. Separation of Circuits
40. Bonding for Grounding
ELECTRICAL COMPONENTS
41. General
42. Electrical Enclosures
43. Motors and Motor Overload Protection
44. Capacitors
45. Electrical Insulating Material
46. Switches and Controllers
SPACINGS
47. High-Voltage Circuits
48. Low-Voltage Circuits
PROTECTION OF USERS AND SERVICE PERSONNEL
49. General
PERFORMANCE
GENERAL
50. General
51. Instrumentation
DUCT-CONNECTED APPLIANCE TEST INSULATION
52. General
53. Corner Installation for Central Furnaces
54. Alcove or Closet Installation for Appliance Furnaces
55. Wall Furnace Installation
56. Recessed Furnace Installation
BOILER AND WATER HEATER TEST INSTALLATION
57. General
FLUE-GAS OUTLET ASSEMBLY
58. General
INITIAL TEST CONDITIONS, TEST PRESSURES, AND BURNER
ADJUSTMENTS
59. Initial Test Conditions
60. Test Pressures and Burner Adjustments
APPLIANCE TESTS
61. Combustion - Burner and Appliance
62. Burner Operating Characteristics
63. Pilot Operating Characteristics
64. Operation of Pilot Actuated Safety Shutoff Devices
65. Direct Ignition Tests
66. Temperature Test
67. Wind Test
68. Direct Vent System Leakage Test
69. Field Wiring Strain Relief Test
70. Short-Circuit Test
71. Dielectric Voltage-Withstand Test
WARM AIR APPLIANCE TESTS
72. Limit-Control Cutout Test
73. Continuity of Operation Test
74. Continuous Operation Temperature Test
75. Blocked Register Temperature Test
76. Blocked Outlet Temperature Test
77. Blocked Inlet Temperature Test
78. Fan Failure Temperature Test
79. Stalled Fan Motor Temperature Test
80. Heating Element Endurance Test
81. Horizontal Central Furnace Air Flow Test
82. Condensate Test
83. Surface Temperature Test
84. Ignition of Flammable Fabric and Related Hazards Test
BOILER TESTS
85. Limit Control Cutout Test
86. Low Water Level Control Cutout Test
87. Continuous Operation Temperature Test
WATER HEATER TESTS
88. Water Temperature Control Test
89. Thermostat Control Test
90. Limit-Control Cutout Test
91. Continuous Operation Temperature Test
92. Burner Durability Test
93. Blocked Flue Test
94. Draft Hoods
95. Vent System Leakage Test
96. Nonmetallic Dip Tube Tests
97. Hydrostatic Pressure Test
97A. Stain-relief test
97B. Leakage-current test
MANUFACTURING AND PRODUCTION TESTS
98. General
98A. Production-line Grounding Continuity Test
MARKING AND INSTRUCTIONS
99. General
100. Warm Air Appliance
101. Water Heater
102. Instructions
OUTDOOR USE EQUIPMENT CONSTRUCTION
103. General
104. Enclosure
105. Field-Wiring Connections
106. Wiring
107. Electrical Insulating Materials
PERFORMANCE
108. Rain Test
109. Gaskets
110. Metallic Coating Thickness Test
MARKING
111. General
APPENDIX A - Standards for Components
APPENDIX B - Requirements Applicable to Specific
             Appliances

Applies to the following gas fuel-burning heating appliances: a) Direct-vent system appliances for manufactured homes and recreational vehicles; and b) Vented appliances for manufactured homes other than the direct-vent system type that provide for separation of the combustion system from the atmosphere of the manufactured home by an installation method.

These requirements apply to the following gas fuel-burning heating appliances: a) Direct-vent system appliances for manufactured homes and recreational vehicles; and b) Vented appliances for manufactured homes other than the direct-vent system type that provide for separation of the combustion system from the atmosphere of the manufactured home by an installation method.