Lanair XT Series Installation And Operating Instructions Manual page 51

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:
• Turn the thermostat off or to a temperature below room temperature
• Disconnect the fuel supply line from the burner.
• Insert the fuel line into a large container.
• Toggle the priming switch from the "RUN" position to the "PRIME" position
• Attempt to fill the container keeping the fuel line above liquid level.
• A steady stream of oil should flow from the fuel line
• If the pump will not pump fuel, attempt to prime the pump (Section 9). If the pump won't
prime refer to troubleshooting chart symptom B.
When using the optional metering pump:
Pump fuel into a graduated container. The flow rate will vary by model.
XT-150 . . . . . . . . . . . . . . . . . .
XT-200 . . . . . . . . . . . . . . . . . .
XT-250 . . . . . . . . . . . . . . . . . .
XT-300 . . . . . . . . . . . . . . . . . .
If flow rate using a metering pump is off by more than +/- 10% contact Lanair Service at
888-370-6531.
After repairs are made, toggle the priming switch from the "PRIME" position to the "RUN"
position, reconnect the fuel supply line to the burner and reset the thermostat.
WARNING: DO NOT OPERATE YOUR HEATER IF THE OIL PRIMARY
SAFETY CIRCUIT IS NOT WORKING!
1.1 gal/hr (69 mL/min)
1.4 gal/hr (88 mL/min)
1.8 gal/hr (113 mL/min)
2.1 gal/hr (132 mL/min)
Visit our website at: www.lanair.com
45
Section 13 - Troubleshooting