Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
R
Page 64
Section 8: Diesel-Burner Service, Maintenance, and Repair Information
Ignition Coil
8.10 Ignition Coil
Function: The Ignition Coil produces a high voltage ignition spark
(approx. 8000 volts), which is released across the metal tips of the
Ignition
Electrodes during the initial Diesel-Burner start-up.
WARNING: Use extreme care when testing the Ignition Coil, as a High
Voltage Shock may result.
NOTE: In
order to perform some of the following procedures it is neces-
sary to detach and reattach the Diesel-Burner Head. Be sure to review
Section
8.2, Page 42 for detaching and reattaching instructions.
Component Test: Remove the four Ignition Coil Screws that secure the
Ignition Coil in place, reference Figure 13. Disconnect the Ignition Coil's
Black (+) and Brown (-) wires from the C-Plug Harness' Yellow (+) and
Brown (-) wires. Connect the Ignition Coil wires directly to a 12 volt DC
power supply (i.e. Black (+) wire to (+) lead and Brown (-) wire to (-) lead).
Turn the power supply ON and watch for a spark to appear across the
metal tips of the Ignition Electrodes, reference Figure 16. If a spark does
not appear, the Ignition Coil must be replaced, reference the Ignition Coil's
"Replacement Procedure" below. Reference Section 10 for spare parts
information.
Cleaning Tips / Maintenance: N/A
Adjustment Procedure: N/A
Replacement Procedure:
1. Disconnect the Ignition Cables from the Ignition Electrodes, refer-
ence Figures 16 and 19. Remove the four Ignition Coil Screws that
secure the Ignition Coil to the Protection Cap, reference Figure 13.
Lift the Ignition Coil and disconnect its wires from the C-Plug
Harness wires, prior to removing (reference Figures 3 and 24).
2. Connect the new Ignition Coil's Black (+) and Brown (-) wires to the
C-Plug Harness' Yellow (+) and Brown (-) wires, reference Figure
24. Attach the Ignition Coil to the Protection Cap with the four
Ignition Coil Screws, then reconnect the Ignition Cables to the
Ignition Electrodes.
Figure 24
Ignition
Coil
Black
Wire (+)
Brown
Wire (-)
Ignition
Cable
Yellow Wire (+)
(to Diesel-Burner)
Brown
Wire (-)
(to Diesel-Burner)