Service manual

— Page 98 —
© 2011 Aqua-Hot
®
AHE-100-02S Hydronic Heating System Service Manual—Rev. B
APPENDIX E: AQUA-HOT MAINTENANCE
Step 10: Replace The Fuel Nozzle
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 switching
the heater ON. Failure to do so may result in ignition of the
diesel-burner and serious bodily injury.
1.
Use a 3/4 in. wrench to hold the fuel nozzle manifold hex, while loosening the fuel nozzle with a 5/8 in. wrench and remove.
2.
When replacing the fuel nozzle, be sure to tighten the nozzle, loosen it a 1/4 turn, and then firmly retighten. This will estab-
lish a seated fit and avoid any leaks.
Figure E10