OIL AND DUAL FUEL SYSTEMS
operator open (close for maintenance only)
air
3D
5D
combustion air
3-way valve
impulse lines
to regulator
to Ratiotrol
atomizing air or gas
gas
oil
oil
3 PIPE DUAL-FUEL BURNER
The gas and atomizing air share a common connection on this type of burner; so the atomizing air can be left on when burning gas. This gives equal air and heat input capacities with either fuel. It is necessary to make a major adjustment of the gas regulator spring to supply gas corresponding to the atomizing air flow at low fire. See page 29, Step 5.
Always pipe air, gas, pilot, and flame monitor to top or side of burner
Liquids should enter burners from below; air, gas, pilot, and flame supervisory devices from above, to avoid accidental liquid accumulation in any of these lines, and to prevent dirt and refractory crumbs from plugging small openings or shorting flame rods.
oil and steam from below center line.
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