Lanair DHI 300 - Manual (Page 6)

Section 1 - General Specifications & Hazards
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6
DHI-300 FRONT
Section 14 - Troubleshooting
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DIMENSIONS:
DHI-300 Height: 61” Width: 43” Depth: 47”
Weight: 370 LBS
FIRING CAPACITIES:
DHI-300 Nozzle @ 1.86 gallons/hour, No. 2 fuel oil
Symptom Possible Cause Corrective Action
A. Burner will not start 1. Main electrical power 1. Reset breaker
circuit breaker tripped
2. Service disconnect 2. Turn switch on or
switch off or fuse blown replace fuse
3. Thermostat turned down/ 3. Turn thermostat up,
improperly installed/ check wires/test
defective components/replace
4. Oil primary safety 4. Reset/test components,
tripped/defective replace if needed
5. Too much light showing 5. Eliminate light to cad cell
on cad cell/defective Test component
B. Burner attempts to fire, 1. Low oil in supply tank or 1. Fill tank, or drain and
but does not establish a contaminated fuel clean tank
flame
2. Plugged or worn nozzle 2. Clean or replace
3. Fuel pressure gauge 3. See section 6, Page 17
fluctuating/pumping system
4. Pre-heater switch is turned off 4. Turn switch on or test
or defective, or defective switch and cartridge heater
cartridge heater
5. Transformer/electrodes not 5. Test transformer/look
sparking for shorts & repair
Replace electrodes/
transformer
6. No air pressure/defective 6. Turn compressor on/test
regulator/defective solenoid regulator/solenoid. Replace
defective components
7. Water in air system 7. Clean air pre-heater and
drain water from system
8. Combustion blower not 8. See flame adjustment
properly adjusted or pages 29-31.
defective Replace blower
9. Improper draft 9. Check draft see page 15.
Make sure chimney is
properly installed
10. Plugged heat exchanger, 10. Clean heater including
or chimney manifold, chimney