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2. Verify operation of draft inducer pressure switch.
A. Turn incoming power off to oven.
B. Remove screw securing control panel door and swing door open to access burner
compartment area.
C. Loosen hose clamp (Fig. 11) and remove vacuum tube from the vacuum switch.
NOTE: Some ovens may have rectangular-shaped vacuum switches.
D. Reconnect incoming power to oven and turn oven on.
E. Set oven to heat and press START.
F. The burners should not come on at this time.
G. If the burners do not come on, proceed to next preventive maintenance procedure.
H. If the burners do come on, contact your local Hobart Bakery Systems service office.
I. Reverse the procedure to install.
Fig. 11
NOTE: Use normally open, common terminals and low vacuum port for the vacuum switch setup.
3. Verify operation of draft inducer (stack fan) pressure switch.
A. Set oven for heat.
B. Disconnect tubing from exhaust vent collar. Burner should go out.
C. Reconnect tubing and burner should establish a flame.
D. If the results have been obtained, proceed to next preventive maintenance procedure.
E. If the results have not been obtained, contact your local Hobart Bakery Systems service
office.