Bosch WR430-7K - Manuel (Page 11)

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Bosch POWER VENTING SYSTEM
B. The Air-Flow Adjustment on the Power Venter is factory set for optimum air flow. Operating at its setting will
assure that combustion gases are safely removed to the outside.
MAINTENANCE
Points of inspection are:
1. Motor - Motor must rotate freely.
2. Fan Wheel - Wheel must be clean of dust or any other coating which inhibits rotation or air flow. Remove
all foreign material from vent system before operation.
3. Spill Switch - Verify proper spill switch operation by observing Operation Sequence and by temporarily
blocking termination outlet.
4. Check Draft - Check for flue gas spillage following steps in the Operation And Checking Draft on page 9.
5. Vent Termination - Inspect to ensure installation and clearances have not been altered or obstructed and
that the back draft flapper (when used) movement is free and operational. Note that terminal hood is
removable for easy flapper maintenance or replacement.
Hinge
Vent termination hood
Flapper