Extended Shutdown; Combustion Air And Ventilation Supply; Inspection Areas - Thermo Products Spirit Series Installation, Operation And Service Manual

 DO NOT allow the fuel tank to run completely dry during the heating season. If the
fuel tank runs completely dry, it may be necessary to purge the oil lines of trapped air.
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 During the warmer weather, keep the tank full to prevent condensation of moisture
on the inside surface of the tank.
 Keep the cap on the fuel tank fill pipe tightly closed at all times to prevent the
entrance of moisture, foreign matter, insects, etc. Also, check the tank, vent, and fill
pipe for cracks and leaks.

Extended Shutdown

If the furnace will be shut down for an extended period of time:
1) Adjust the room thermostat to the lowest set point and set the operating mode, if
equipped, to "OFF".
2) Open the disconnecting switch serving the furnace.
3) Close the manual oil shutoff valve.
Combustion and Ventilation Air Supply
The furnace and venting system require a generous amount of clean air to operate
safely. Lack of adequate combustion and ventilation air can result in erratic operation of
the burner, noisy and poor combustion, sooting of the combustion chamber, and fuel
odors in the air. Never block off or restrict the supply of air to the furnace.

Inspection Areas

Burner Compartment: On the highboy furnace models, the burner compartment can be
inspected by removing the front top door of the furnace. Look for signs of excessive heat,
such as discoloration of components, damage to material from rust or corrosion, soot or
carbon build-up, and evidence of fuel oil leakage.
Exterior of Furnace: The exterior of the furnace should be inspected for signs of
excessive heat such as discoloration of materials and damage from rust or corrosion.
Confirm the base or frame supporting the furnace in level and in sound condition.
Venting System: The furnace flue pipe, vent connector, barometric damper, and
chimney should be inspected for:
 Signs of excessive rust, corrosion pitting, and holes.
 Signs of condensation or moisture leakage.
 Evidence of structural damage, and loose or disconnected piping joints.
 Presence animal nests.
 Free movement of the vane of the barometric damper without binding or
interference.
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