Lanair DHI 300 - Manual (Page 9)

Section 1 - General Specifications & Hazards
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• The Lanair Heater provides the owner with a dependable, versatile and simple means of
burning No. 1 and No. 2 fuel oils, 5W through 50W used crankcase oils, and used auto-
matic transmission fluids. Maintained correctly, the heater will give you years of service.
Please carefully read this owner’s manual. If in any case you have a problem with your
heater, or its installation, you should contact the Lanair Customer Service Department at
1-800-753-1601.
• Do not attempt to start the burner when excess oil, oil vapor, or fumes have accumulat-
ed! Never press the red button on the oil primary control more than twice! This could
cause excess vapor, or fuel to ignite causing damage to the heater and/or chimney.
• Do not store or use gasoline, or any other flammable liquid and/or vapors near this
heater.
• This heater is not designed for use in hazardous atmospheres such as: Paint Shops, Feed
Mills, installations where explosive or flammable conditions are present or could occur.
DIMENSIONS:
Height: 61” Width: 43” Depth: 47”
Weight: 370 LBS
FIRING CAPACITIES:
DHI-300 Nozzle @ 1.86 gallons/hour, No. 2 fuel oil
MINIMUM CLEARANCE TO COMBUSTIBLES:
Top . . . . . . . . . . . . . . . . . . . . . . . . 6” Chimney Connector . . . . .18”
Sides . . . . . . . . . . . . . . . . . . . . . .18” Rear . . . . . . . . . . . . . . . . . . . . . 6”
Front . . . . . . . . . . . . . . . . . . . . . .24” Bottom . . . . . . . . . . . . . . . . .18”
THIS HEATER IS DESIGNED TO BURN THE FOLLOWING APPROVED FUELS:
Used 5W through 50W Crankcase Oils
Used Automatic Transmission Fluid
No. 1 and No. 2 Fuel Oils
WARNING! Lanair heaters rely on natural draft. Down drafts (positive pressures)
in the heaters chimney will occur in buildings where negative pressures are created
by exhaust fans, (car exhaust, paint booths, etc). Do not try to use a power vent to
overcome a down draft (positive pressure). An adequate make-up air system is
required when exhaust fans are used (consult your heating contractor).
!
Section 14 - Troubleshooting
QUESTIONS?... Contact Customer Service at 1-800-753-1601 M-F 8:00 am- 4:15 pm CST
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Initial Diagnosis:
When an operating problem occurs, a determination must be made whether or not the fuel
pump is pumping a sufficient amount of oil that contains no air or water.
Take these steps:
• Adjust the burner air regulator to -0- PSI.
• Turn pre-heater rocker switch off (red light off ).
• Shut off oil supply line valve to the burner.
• Remove the fuel supply line from the supply tank.
• Attach a flexible piece of tubing at least 3 feet long to the outlet on the return side of
the oil by-pass regulator.
• Insert the tubing into the bottom of a large jar.
• Jump the cad cell circuit and start the fuel pump (see below).
• Attempt to fill the jar above the open end of the tubing.
• If the pump will not pump fuel, attempt to prime the pump (Section 10). If the pump
won’t prime refer to Flow Chart Item B.
If no air or water is present the flow must be determined.
• Pump fuel for 1 minute into a graduated container, if the flow rate is less the 250
MILS/Minute (8-1/2 Ounces), refer to Section 13 Troubleshooting Chart Item B.
If the flow rate is more than 250 MILS/minute (8-1/2 Ounces), refer to Troubleshooting
Chart Item C.
After repairs are made, remove the cad cell jumper wire, and reconnect the cad cell wires to
the oil primary.
By-passing the oil primary safety circuit:
Some trouble-shooting test may require the cad
cell safety circuit in the oil primary control to be
bypassed, to do this:
• Remove the 2 yellow wires from the F-F
terminals on the oil primary control.
Remove two yellow wires
FIRE HAZARD WARNING: DO NOT OPERATE YOUR HEATER IF THE OIL
PRIMARY SAFETY CIRCUIT IS NOT WORKING!
!