Product Overview | Tempest® 4442 Burner
Take maximum advantage of high velocity by keeping the burner on high fire most of the time. Use StepFire™ or high-low (two-position) firing control systems. For best performance, a limiting orifice (LOV) gas valve should always be installed close to the burner (within 10" of gas inlet). See the installation section for other control recommenda- tions, particularly for high turndowns (up to 20:1). Ignition: Direct spark ignition is normally supplied with a 10mm spark plug, which is furnished with the burner. 4051 and 4055 Direct Spark Igniters are also available. 4011 Premix or 4020 Nozzle-Mix Pilots can also be used. However, both the pilot gas and pilot air must be shut off after lighting the burner. Leaving the pilot air on may reduce the operating and turndown limits of the burner. Torch lighting of Tempest® Burners is not recom- mended due to the high tile pressures, and will nei- ther light nor relight from hot furnace refractory. Aardvark model: Bulletin 4442A and the improved Bulletin 4441A describes an all metal version of the Tempest. It is used as a stand-alone air heater. Its threaded metal snout can be installed in the end of a manifold to feed hot air to a number of heating, warming, or drying stations. 4442H model: For preheated air up to 800°F, built with flanged mounting only. Not available with the standard "eared" mounting. 4441 model: See bulletin 4441 for details on the improved Tempest® burners.
Combustion air: 20 osi maximum pressure. Gas: Natural or LP or LP-air mix.
Pressure must be 65% of air pressure at burner. Low Btu gases (under 600 Btu/cf) may require special internals. (For light oil, use 6435 Tempest ® III Dual-Fuel™ Burner.) Flame supervision: Required for any batch operation, and for continuous applications that are below 1400°F at any time. UV detectors are preferred. Flame rod performance on other sizes are inconsistant, and while they can be made to work with trial and error, are not generally recommended.Flame rods should not be used on -0, and -4-S sizes Use a half-wave ignition transformer to avoid UV sensing of spark during trial for ignition. If a pilot is used, it must be interrupted within 10 seconds after main burner ignition. Consult National Safety standards and insurance under- writers for specific requirements for flame controls. Stability limits: 300% XSAir for -0, 1000% for -1, 250% for -4-S, 2000% or better for all other sizes. 30% excess fuel. Control: Most preferred are individual cross-connected or bled-impulse ratio regulators, which give maximum turndown flexibility and control.
A good alternative is individual 7216 Adjustable Ratio Regulators which offer a fuel efficiency compromise: stoichiometric at high fire, excess air on turndown.
CLEARANCE DIMENSIONS (for details, see installation section on page 10)
Burner
dimensions in inches
designation
A
C
D
4442-0 4442-1 4442-2 4442-3 4442-4
1 ¼ 1 ¼ 1 ¼ 1 ½
14 ¼ 14 ¼ 14 ¼ 14 ¼ 14 ¼ 14 ¼ 15 5⁄16 15 5⁄16 25 ½
7 ½ 7 ½ 7 ½ 7 ½ 7 ½ 7 ½
D sq.
2 2
4442-4-S
4442-5 4442-6 4442-7
2 ½
10 10 10
45°
A – NPT Air Inlet
3 4
C
FLanged Mounting (F)
Classic "Eared" Mounting (E)
Bulletin 4442 Page 3
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