Fluid Circulation Pump
©Aqua-Hot®
250-D03 Diesel Series Service Manual
REV 220302
p. 75
Step 4: Running burner off an external fuel source
1. Using an external fuel source and rubber fuel lines, hook the burner supply and return fuel lines up to run off the external
fuel source.
A spark will appear across the ignition electrodes for a brief
moment after the diesel burner has been activated� DO NOT
attempt to make any fuel pressure adjustments until the spark has
disappeared. Failure to do so may result in serious bodily injury. In
some installments, it may be necessary to shine a light on the flame
sensor to simulate a flame condition to shut off the ignition coil.
2. Turn the diesel burner ON, either on the LCD screen or the RV control panel. A pressure will register on the fuel pressure gauge
once the fuel solenoid opens (after approximately 10-20 seconds).
Figure 123
Figure 123
Fuel Pressure