Fluid Circulation Pump
©Aqua-Hot®
250-D03 Diesel Series Service Manual
REV 220302
p. 79
Aqua-Hot Maintenance Procedure
Step 1: Test Run the Diesel Burner
1. Turn the diesel burner ON, either on the LCD screen
or RV control panel.
2. After the diesel burner has ignited, inspect the
exhaust for smoke.
3. Shut the diesel burner off and wait for unit to
completely shut down.
Figure 131
Step 2: Replace the Fuel Filter
1.
Locate the fuel filter
2. Using hose pinch off pliers, clamp off both fuel lines
going to the fuel filter. Reference Figure 131.
3.
Remove the old fuel filter. Replace the fuel filter with
the proper replacement canister.
4. Remove the hose pinch off pliers.
Step 3: Run the Diesel Burner
1. Turn the diesel burner ON.
2. After the diesel burner has ignited, let it burn for 1-2
minutes to purge the old fuel out of the nozzle holder,
to prevent contamination of the replacement nozzle.
3. Shut the diesel burner OFF, and wait for the unit to
completely shut off.
NOTE:
Before performing an annual maintenance, it is
recommended to test run the diesel burner. While testing,
inspect the exhaust for smoke.
NOTE:
The diesel burner can either be shut off by:
• Turning the diesel burner OFF on the LCD screen
• Disconnecting the ETS module wires
• Unplugging the diesel burner controller (Figure 132)
Figure 132
Diesel Burner
Controller Plugs
Control Thermostat
Burner Maintenance
10 Micron
Fuel Filter
