Owner`s manual

Computer Control Startup
12
Gas Pressure Adjustments
THE F OLLOWING STARTUP PROCEDURES MUST
BE PERF ORMED BY A QUALIFIED T E C HNICIAN
ONLY.
REGULATED GAS PRESSURE
NOTE: Gas models only.
1. Let the oven heat to 510_ F (266_C). Program
the belt speed for 7 minutes.
2. Check the pressure at the tap on the dual reg-
ulated gas valve or at the tap on the tee valve.
Incoming static gas pressure to the unit, with all
the gas appliances draw ing from the supply,
should be a minimum of 5.5” W.C. (14 mbar) for
natural gas and 11” W.C. (28 mbar) for propane
gas.
The manifold pressure must be 3.5” W.C. (9 mbar)
for natural gas and 10” W.C. (25 mbar) for propane
gas. This measurement should be taken after the
regulator located inside the control box.
NOTE: For MT1828G, manifold pressure must be
3.5” W.C. for both Natural gas and Pro-
pane.
The pressure can be checked at the tap on either
the dual regulated gas valve or the solenoid valve.
Turn the adjusting screw on the left front side of the
dual regulated valve to adjust the gas pressure.
Turn the screw clockwise to raise the gas pressure
and counter-clockwise to lower it.
NOTE: Be sure to reinstall the screw cap; if the di-
aphragm ruptures the cap acts as a flow
limiter.
PRIMARY AIR ADJUSTMENT
NOTE: Gas models only.
The air shutter disc on the burner blower motor, lo-
cated inside the control box at the top of the as -
sembly, is factory adjusted to provide t he most effi-
cient blue flame possible at sea level.
1. Visually examine the quality of the flame.
2. If it needs adjusting, increase or decrease the
air mixture to attain the best flame quality.
Pressure Tap
Regulator
Cap
Regulator
Adju stment
Figure 11