Model 201CRD & 301CRD Advanced oil burners — Instruction manual
Carlin part number MN2301 Rev. 04/12/04
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Combustion/ventilation air checklist
The burner may operate successfully under momentary
downdraft conditions, but sustained downdraft is unsafe.
• This can occur with an inadequate or incorrectly installed
chimney/vent.
• It can also occur in rooms/buildings equipped with exhaust
fans or unsealed return air ducts.
• Always check operation of the burner under all conditions
to verify vent system operates correctly.
• You may have to interlock the burner with exhaust fans to
shut burner off when fan operates; or provide make-up air
to the appliance room sufficient to prevent any negative
pressure in the space.
• Failure to correct downdraft or negative room pressure
operation could result in severe personal injury, death or
substantial property damage.
❏ Verify that openings are unobstructed.
❏ Verify that appliance space and air source spaces are free of:
• Gasoline or other flammable liquids or vapors.
• Combustible materials.
• Air contaminants and chemicals, such as laundry products, paint, thinner,
varnish, etc.
❏ Confirm with the building owner that the area will be kept free of these
materials at all times and that air openings will be kept unobstructed.
2. Prepare site • assemble burner • mount burner (continued)
Verify clearances
Verify that the burner/appliance will maintain all required clearances:
❏ Verify clearance from combustible construction, as specified by appliance
manufacturer and local codes.
❏ Verify clearances for service and maintenance as required in the appliance
manual and applicable codes.
❏ Vent system components must maintain all necessary clearances to
combustible construction, including the correct design of thimbles and
insulation where penetrating combustible walls.
Table 2 Minimum combustion/ventilation air openings
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