– 35 –
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. 13) 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
Bakery Systems service ofce.
I. Reverse the procedure to install.
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 ame.
D. If the results have been obtained, proceed to next preventive maintenance procedure.
E. If the results have not been obtained, contact your local Bakery Systems service ofce.
Verify Operation of Steam
1. Check steam system for proper operation.
A. Turn on the water supply.
B. Turn on the oven and set to normal bake temperature.
C. Allow to cycle three times to stabilize temperature.
D. Set control to call for steam.
E. Observe operation. If steam is not observed, contact your local Bakery System service ofce.
After completion of the owner PM Procedure, you will need to contact an authorized Bakery
System service agency for any needed repairs.
Keep a copy of the Owner Preventive Maintenance Checklist for your records.
Fig. 13