Hurricane SCH25, Service And Troubleshooting Manual

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5.3.3. Fuel Nozzle
To install the fuel nozzle, do the following:
1.
Turn off service switch and allow the heater to completely power
down (this will take 2 minutes).
2. IMPORTANT: Disconnect the main power (12VDC) from the heater.
Disconnecting the 12VDC power ensures that the heater will not
attempt to fire if the service switch is accidentally turned ON. If the
heater were to attempt to fire with the front cover off, it will project
open flame towards the user.
3. Remove the screws from the front cover (using a Philips head
screwdriver) and remove the cover.
4. Loosen the thumb screw on top of the fuel block and remove it from
its mounting position.
5.
Unscrew the fuel nozzle (counter-clockwise) using a 5/8” wrench.
6. When the fuel nozzle is removed, a fuel filter is visible inside the fuel
block. Remove this filter and clean it using solvent and high pressure
air.
7. For the following procedure, keep the nozzle vertical so the
distributor does not fall out when the nozzle is taken apart.
8. Hold the fuel nozzle using a 5/8” wrench and turn the stem counter-
clockwise using a crescent wrench.
9. Clean the distributor orifice and air slots of any debris using solvent
and high pressure air. Check the ‘O’ rings for nicks and replace if in
doubt.
10.When putting the nozzle head and stem back together, ensure the
distributor is fitted properly in position. Also, keep the nozzle
vertical when putting the nozzle head and stem back together. If this
is not done, the nozzle will get damaged.
Figure 6: Fuel Nozzle