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3.1)
MAINTENANCE
The power venter must be inspected bi-annually by a
qualified technician. The points of inspection are listed
below.
3.1.1) Motors
Both motors must rotate freely. Oil at the beginning
and the middle of the heating season with four drops
of special exterior oil suitable for –35
access the motor, remove the cover of the fan-motor
assembly.
3.1.2) Blower wheel
Both blower wheels must be clean of soot, ash or any
other coating which might inhibit the flow of air.
Remove all foreign material from the vent before
operation. To access the blower wheels, remove the
fan-motor assembly cover and remove the blower
wheels by unscrewing the attachment to the blower.
PART 3
MAINTENANCE
o
o
C (-30
F). To
3.1.3) Pressure switch
The pressure switch must operate freely. Ensure that
the thermostat is on and the oil burner is running.
Block the outlet of the vent-hood and check if the
burner stops immediately. If not, the proving switch is
defective and should be replaced. See Section 2.2.2.
3.1.4) Back-flow damper
The back-flow damper must be clean of soot, ash or
any coating which might inhibit the flow of air. Remove
all foreign material from the damper before operation.
To access the damper, simply remove it from the
connecting pipe. Be sure to replace it in the proper
position.
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