Fluid Circulation Pump
©Aqua-Hot®
250-D03 Diesel Series Service Manual
REV 220302
p. 85
Burner Maintenance
Step 9: Replace Fuel Nozzle
1.
Use a ¾” wrench to hold the fuel nozzle manifold hex, while loosening the fuel nozzle with a ⅝” wrench and remove.
2.
When replacing the fuel nozzle, be sure to tighten the nozzle, loosen it a ¼ turn, and then firmly re-tighten. This will
establish a seated fit and avoid any leaks.
⅝” Wrench
¾” Wrench
NOTE:
Be sure to use care when handling the new fuel nozzle. Oils and/or small dust
or dirt particles from your hands may plug the nozzle’s small orifice. A partially plugged
orifice will restrict fuel flow, which will affect the combustion process of the diesel burner.
Be sure to reattach the diesel burner head prior to turning
the heater ON� Failure to do so may result in ignition of the
diesel burner and serious bodily injury.
Diesel Burner Head
Ignition Electrodes
Fuel Nozzle
Fuel Nozzle
Manifold Hex
Figure 146
Figure 147