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Fuel System
Fuel Pump Mounting
• Using the bracket and rubber mount provided, install fuel pump as shown in Figure F2.
• Isolating the pump with the rubber holder helps to minimize noise created during operation.
• Ensure that the proper mounting angle is observed to avoid cavitation. (Figure F3)
Fuel Source
• Connect directly into the fuel tank using our dedicated fuel pickup tube. (Figure F4)
• Teeing into the existing vehicle fuel lines is not recommended.
• There are three common methods to install a fuel pickup tube.
o Use NPT / compression fittings if available
o Use spare fuel gauge plate if available
o Drill dedicated holes into the tank.
Fuel Pickup Pipe
Figure F2
Figure F3
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Mount the Fuel Pick Up Pipe into the tank in the order shown below.
Please Note:
To avoid dropping the compression fitting and base into the fuel tank, make sure it is tightened onto the pipe
before putting pipe into tank.
Be careful not to let go of the fuel pipe and drop it into the fuel tank while assembling components onto fuel
pipe.
Electrical System Installation
The heater harness that comes with the heater has all the electrical connections preassembled for easy
installation. Secure any excessive length of cables in a protected spot.
To route the cables to the fuel pump and the batteries use either an existing cable passage or drill a hole
near the heater to route the cables outside. Make sure to seal the hole around the cables and make sure
they are protected from chaffing or damage during vehicle movement.
When installing the controller it may be necessary to remove the terminals from the connector in order to
route them through the small hole in the mounting surface. Be extremely careful not to damage the
terminals or connector and make sure the wires are reinstalled in the correct positions.
Safety Warnings for Electrical Wiring
Before installing the harness remove the main 15 or 20 Amp fuse until the wiring is completely installed to
avoid accidentally shorting the wiring during assembly. Remember to reinstall when starting heater.
Ensure that the electric cables or insulation and connectors are not damaged prior to installation and be
careful not to pinch or damage cables and connectors during installation.
Be sure to consider the movements of the vehicle cab when installing and securing the harness to the fuel
pump and batteries and leave enough excess play in the harness to avoid pulling on or damage to the
harness.
Lubricate all outside connections with contact grease to avoid corrosion.
Figure F4
