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7. Insert Fuel Filter in the Fuel Tank and using adjustable wrench turn the Filter 90 degrees clockwise.
8. Attach Fuel Line to Fuel Filter neck.
9. Reinstall side cover with screws provided.
ADJUSTING PUMP PRESSURE
After hours of use, it may be necessary to adjust the Pump Pressure.
If the heater is not producing a strong flame:
Increase the pressure by turning the adjustment screw clockwise.
If the heater is producing a flame that extends beyond the end of the heater:
Reduce the pressure by turning the adjustment screw counterclockwise.
Pressure
Gauge
Plug
Relief
Valve
Adjusting Pump Pressure
Model HF75K
PRESSURE
POSSIBLE CAUSE
Photocell (Flame Color Checking Sensor) Error
Oil Shortage
Bad Photocell (Flame Sensor)
E1
Incomplete Combustion
Contamination of Fuel Filter
Ignition Failure
Temperature Sensor (Thermister) Error
E2
Bad Connection or Sensor Error
LO
Below 1°F
HI
Over 99°F
Heater stops when the temperature reaches to
OH
140°F
Continuously operating without set-
CN
temperature
Blinking Error during operation
WARNING: Never leave the heater unattended while operating.
Disconnect the heater from its power source when not in use.
MODEL
HF75K
PUMP
3.2 PSI
TROUBLESHOOTING
Adjusting Pump Pressure
Model HF125K, HF175K, HF215K
HF125K
HF175K
5.2 PSI
6.0 PSI
CORRECTIVE ACTION
Refill the fuel tank
Check and clean or replace the photocell (flame sensor)
Use fuel rated for this heater
Clean or replace fuel filter
Check wire connections
Check spark plug for normal firing (clean or replace if needed)
Check wire connection
Replace sensor
Normal
Normal
Heater automatically restarts after cooling
Normal
Check error code
Reset to restart
-11-
HF215K
7.0 PSI
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