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How to Change Injector (Orifice) Size
1. Disconnect electrical power from tumbler. Close
gas shut-off valve to tumbler. Refer to Figure 6.
2. For Johnson GM7000 gas valve:
Remove burner orifice(s) from the spud holder.
Refer to Figure 7.
3. Install the new, correct injector(s) (orifices).
Refer to Figure 8. Torque each to 9 – 10 Nm.
4. Commission tumbler for use.
NOTE: Blank injectors (orifices) are available as
Part No. M400995.
How to Adjust Gas Valve Governor/Regulator
1. Check gas injector (manifold) pressure as
follows. Refer to Figure 7.
2. Loosen screw plug inside pressure tap located on
underside of valve.
3. Connect a “U”-tube manometer (or similar
pressure gauge) to the tap.
4. Start tumbler and note pressure once flame is
burning. Remove regulator cap and adjust
regulator screw until the injector pressure per
applicable table is achieved. Replace regulator
cap and close needle valve (pressure tap).
5. Commission tumbler for use.
Figure 8
TMB2015N
1 Size Stamped on Orifice
1
BURNER INJECTOR
(ORIFICE)