John Wood Power Vent (Non-ENERGY STAR qualified models) - Manual (Page 30)

Venting System and Blower
Inspect the venting system periodically (minimum twice
annually) to make certain that the vent passageways, vent
terminal and blower assembly are free and unobstructed.
Ensure that any condensate is draining freely. Clean as nec-
essary.
• Inspect the vent piping, elbows and connections for
signs of stress cracking or deterioration. Make certain
the venting is free to move and that all pipe hangers and
isolation supports are properly positioned and securely
attached. Replace any broken components and rectify
any installation problems.
• Particles, especially lint, can clog the vent blower
wheel. This can be problematic, especially where con-
densation is present, as particles may adhere to the
venting surfaces. These conditions can result in nui-
sance failures. In areas that have a high level of air-
borne particulate (e.g. lint, sawdust, process smoke,
laundry areas, etc.) inspection and cleaning may need
to be done more frequently. Clean the blower wheel and
venting as required to ensure proper performance.
• Inspect the flue collector area for signs of corrosion.
This can be an indication of contaminated air, a wet
environment, poor burner set up, or high levels of con-
densation occurring at the flue collector. Determine and
correct any poor operating conditions.
– 30 –
LIMIT
SWITCH
WIRES
DRAFT
DIVERTER
AIR PRESSURE
TUBING
MOTOR
VENTILATION
OPENINGS
BLOWER
MOTOR
AIR INTAKE
OPENING FOR
DRAFT DIVERTER
L I M I T
SWITCH
Figure 28 Blower Maintenance
WARNING
Keep the area around the heater clear and
unobstructed.