Service manual

— Page 68 —
© January 2013 Aqua-Hot
®
600-D01 Series Hydronic Heating System Service Manual - Rev. A
1. Check “Fuel Solenoid Valve”
wires for continuity. Replace
wires if necessary.
2. Replace “Control Unit” if wires
indicate continuity.
3. Retest fuel flow (without Fuel
Nozzle)
4. Install “Fuel Nozzle”.
5. Retest Fuel Nozzle spray pattern
(fine mist of fuel present?).
6. Reattach “Diesel Burner Head”
and attempt heater restart.
1. Turn the Control Switch OFF.
2. Replace “Fuel Nozzle”.
3. Retest Fuel Nozzle spray pattern
(fine mist of fuel present?).
4. Reconnect ignition wires to
“Ignition Electrodes” or remove
jumper wires.
5. Reattach “Diesel Burner Head”
and attempt heater restart.
NOTE: If an improper fuel spray is still observed (a normal spray
pattern should be observed as a coned-shaped mist) the Diesel
Burner’s “Fuel Pump” should be calibrated for the proper fuel
pressure setting.
End of Troubleshooting Flow Chart.
For additional troubleshooting information please contact:
Aqua Hot Heating System’s Service Department
at 303-659-8221
Mon-Fri
7:00 a.m. - 4:00 p.m.
SECTION 9: DIESEL-BURNER COMPONENTS - TROUBLESHOOTING FLOW CHART