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The pilot pressure has been pre-set at the factory and with proper supply pressure will provide a safe,

CORRECT

FIGURE 7

All orificing and pressure setting was done at the factory and, with correct supply pressure will provide a

safe, efficient source of heat. If installed above 2,000 ft. elevation, the main burner orifice must be changed.

Orifice change must be completed by a qualified installer or service technician. See orifice chart on Page 10

for correct size. If there is any question about the manifold pressure, have a qualified serviceman check

using a manometer. The manifold pressure should be 3.0" w.c. for natural gas and 10.0" w.c. for L.P. gas.

A proper burner flame will have a soft blue outer mantel approximately 3.5 in. tall with a darker blue inner

mantel approximately 1/4" tall.

INNER

MANTEL

1/4"

CORRECT FLAME

PROPER OPERATION

ODS / PILOT FLAME

reliable ignition source. See Figure 7.

INCORRECT -

LOW PRESSURE

BURNER FLAME

OUTER

MANTEL

3-1/2"

FIGURE 8

Page 12

INCORRECT - OXYGEN

LEVEL DROPPING

INCORRECT FLAME