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:
- At the rate of 4 percent for each 1000 feet (305 m) above sea level before selecting appropriately sized appliances.
- As permitted by the Authority Having Jurisdiction.
- 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, temperature- and 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]