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M414905
28
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How to Adjust Gas Valve Governor/Regulator
1. Check gas burner orifice (manifold) pressure as
follows. Refer to Figure 12.
2. Remove screw plug from pressure tap.
3. Connect a “U”-tube manometer (or similar
pressure gauge) to the burner orifice (manifold)
pressure tap.
4. Start tumbler and note pressure once flame is
burning. Remove regulator cap and adjust
regulator screw until the burner orifice pressure
per applicable table is achieved. Replace
regulator cap. Refer to Figure 12.
5. Commission tumbler for use.
Figure 13
TMB2015N
1 Size Stamped on Orifice
1
BURNER
ORIFICE