Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
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Page 45
Replacement Procedure:
1. Remove the four Ignition Coil Screws that secure the Ignition Coil to
the Protection Cap, reference Figure 13. Lift the Ignition Coil to
disconnect its wires from the C-Plug Harness wires prior to remov-
ing. Remove the Protection Cap from the Diesel-Burner so that the
Motor and Clutch Halves are exposed, reference Figures 13 and 14.
2. Remove the three Hex Head Screws that secure the Motor and
flange assembly to the Blower Housing, reference Figure 13.
Remove the Motor and flange assembly along with the Clutch
Halves, reference Figures 13 and 14. Disconnect the Motor's Black
(+) and Brown (-) wires from the C-Plug Harness' wires, reference
Figure 13.
NOTE:
Inspect the Clutch Halves' for cracks and also ensure that the
flat portion in each shaft hole is free of wear and tear. Too much play on
the shaft produces a loud clacking noise. If any cracks or wear are
detected, the Clutch Half must be replaced. Reference the Hydro-Hot's
"Parts Manual" for spare parts information.
3. Detach the Motor from the Motor Flange by removing the two
Phillips Head Screws that fasten the two parts together, reference
Figure 13.
NOTES:
A: Be sure to test the Diesel-Burner's Bearings prior to reinstalling the
Motor. Worn Bearings can cause lower than normal RPM readings
and premature Motor wear. To properly test for worn Bearings,
reference Section 8.9, Page 60 for the Bearings "Function Test"..
B: The Motor must be mounted to the flange with the wires and drain
hole pointing downward and the recessed edge of the Motor Flange
pointing upward, reference Figure 14. This will ensure a proper
Protection Cap fit.
4. Reinstall a Clutch Half on both the new Motor's shaft and the
Combustion Air Blower's shaft. Attach the Motor and flange assem-
bly, with the recessed edge of the Motor Flange in-line with the
wiring access slot of the Blower Casing, to the Blower Housing with
the three Hex Head Screws, reference Figure 14.
NOTE:
Inspect the Blower Casing's O-Ring for damage or wear prior to
reinstalling the Diesel-Burner Head's Protection Cap, reference Figure
14. If damage or wear exists, replace the O-Ring. Reference the Hydro-
Hot's "Parts Manual" for spare parts information.
5. Connect the Black (+) and Brown (-) wires of the new Motor to the
C-Plug Harness' Black (+) and Brown (-) wires, reference Figure 13.
Feed the C-Plug Harness' Yellow and Brown wires back through the
wiring access hole in the Protection Cap, reference Figure 14.
6. Reinstall the Protection Cap. Reconnect the Black (+) and Brown (-)
wires of the Ignition Coil to the C-Plug Harness' Yellow (+) and
Brown (-) wires, reference Figure 24. Reinstall the Ignition Coil and
Section 8: Diesel-Burner Service, Maintenance, and Repair Information
Motor,
continue
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