HeatFast HF75K User Manual

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-10-

WARNING: Never leave the heater unattended while operating.

Disconnect the heater from its power source when not in use.

NOZZLE AND SPARK PLUG

Contaminated fuel, build-up of carbon, and accumulated dirt can aﬀect the performance

of these parts. Clean or replace these parts every 500 hours or as needed to ensure

opmal performance of the heater.

REPLACING THE NOZZLE

1. Remove Upper Shell.

2. Disconnect Air and Fuel Lines from the Nozzle Rod.

3. Remove ignitor wires from the Spark Plug.

4. Remove Spark Plug from the Nozzle Rod using a Phillips

screwdriver.

5. Twist the Nozzle Rod counterclockwise to remove it from the

Burner Head.

6. Carefully remove the Nozzle from the Nozzle Rod using a 5/8”

socket wrench.

7. Soak the nozzle in clean 1-K Kerosene to loosen parcles.

8. Inject compressed air into the front opening of the nozzle to

loosen parculate. WEAR SAFETY GLASSES.

9. Install new (or cleaned) Nozzle into Nozzle Rod and ghten

rmly.

10. Reassemble by reversing steps listed above.

REPLACING THE SPARK PLUG

1. Remove Upper Shell.

2. Remove igniter wire from Spark Plug.

3. Remove Spark Plug from Nozzle Rod using medium Phillip screwdriver.

4. Clean and re-gap the Spark Plug electrodes to 0.140 inches (3.5 mm) gap.

5. Reinstall Spark Plug into Nozzle Rod.

6. Aach igniter wires to Spark Plug.

7. Secure Upper Shell.

Nozzle

Rod

Nozzle Face

Nozzle Rod

Nozzle

Rod

Spark Plug

Fuel Hose

Fitting

Air Hose Fitting

Gap

FUEL FILTER

The Fuel Filter should be cleaned or replaced at the start of the season and

as needed throughout the season to ensure opmal performance by the

heater. Clean the Fuel Filter by rinsing the screen with clean 1-K Kerosene.

Replacing the Fuel Filter

1. Remove the Right Side Panel screws using a medium Phillips

screwdriver.

2. Remove Side Cover.

3. Disconnect the Fuel Line from the Fuel Filter neck.

4. Turn Fuel Filter counterclockwise 90 degrees using an adjustable

wrench.

5. Pull upwards and remove.

6. Wash Fuel Filter with clean 1-K Kerosene.

Side Cover

Power Switch

Power Switch Wire

Screw

Fuel Filter

Fuel Line

SEASONAL MAINTENANCE SCHEDULE

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HeatFast HF75K 75,000 BTU Forced Air Kerosene Heater with Thermostat

User Manual - Page 10