Cover [PDF]

Preface and Acknowledgements [PDF]

California Code of Regulations, Title 24 [PDF]

How to Distinguish Between Model Code Language and California Amendments [PDF]

How to Distinguish Model Code Language from California Amendments [PDF]

Foreword [PDF]

Format of the Uniform Mechanical Code [PDF]

Committee on Uniform Mechanical Code [PDF]

Section Relocation [PDF]

Table of Contents [PDF]

Chapter 1 Administration

Chapter 2 Definitions

Chapter 3 General Regulations

Chapter 4 Ventilation Air

Chapter 5 Exhaust Systems

Chapter 6 Duct Systems

Chapter 7 Combustion Air

Chapter 8 Chimneys and Vents

Chapter 9 Installation of Specific Appliances

Chapter 10 Boilers and Pressure Vessels

Chapter 11 Refrigeration

Chapter 12 Hydronics

Chapter 13 Fuel Gas Piping

Chapter 14 Process Piping

Chapter 15 Solar Energy Systems

Chapter 16 Stationary Power Plants

Chapter 17 Referenced Standards

Appendices [PDF]

Appendix A Residential Plan Examiner Review Form for HVAC System Design

Appendix B Procedures to be Followed to Place Gas Equipment in Operation

Appendix C Installation and Testing of Oil (Liquid) Fuel-Fired Equipment

Appendix D Fuel Supply: Manufactured/Mobile Home Parks and Recreational Vehicle Parks

Appendix E Sustainable Practices

Appendix F Sizing of Venting Systems and Outdoor Combustion and Ventilation Opening Design

Appendix G Example Calculation of Outdoor Air Rate

Index [PDF]

History Note Appendix [PDF]

The input rate of the burner shall be adjusted to the value in accordance with the appliance manufacturer's instructions. Firing at a rate in excess of the nameplate rating shall be prohibited. The input rate shall be adjusted by changing the size of a fixed orifice, changing the adjustment of an adjustable orifice, or readjusting the appliance's gas pressure regulator outlet pressure (where a regulator is provided in the appliance). [NFPA 54:11.1.1]
Gas input ratings of appliances shall be used for elevations up to 2000 feet (610 m). The input rating of appliances operating at elevations above 2000 feet (610 m), shall be reduced in accordance with one of the following methods:
  1. At the rate of 4 percent for each 1000 feet (305 m) above sea level before selecting appropriately sized appliances.
  2. As permitted by the Authority Having Jurisdiction.
  3. In accordance with the manufacturer's installation instructions. [NFPA 54:11.1.2]
The primary air for injection (Bunsen)type burners shall be adjusted for flame characteristics in accordance with the appliance manufacturer's instructions. After setting the primary air, the adjustment means shall be secured in position. [NFPA 54:11.2]
Where a safety shutoff device is provided, it shall be checked for operation and adjustment in accordance with the appliance manufacturer's instructions. Where the device does not function properly to turn off the gas supply in the event of pilot outage or other improper operation, it shall be serviced or replaced with a new device. [NFPA 54:11.3]
Appliances supplied with means for automatic ignition shall be checked for operation within the parameters provided by the manufacturer. Any adjustments made shall be in accordance with the manufacturer's instructions. [NFPA 54:11.4]
Where required by the manufacturer's instructions, protective devices furnished with the appliance such as a limit control, fan control to blower, temperatureand pressure-relief valve, low-water cutoff device, or manual operating features, shall be checked for operation within the parameters provided by the manufacturer. Adjustments made shall be in accordance with the manufacturer's instructions. [NFPA 54:11.5]
Draft hood-equipped appliances shall be checked to verify that there is no draft hood spillage after 5 minutes of main burner operation. [NFPA 54:11.6]
Operating instructions shall be furnished and shall be left in a prominent position near the appliance for the use of the consumer. [NFPA 54:11.7]
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