Diesel-Burner Controller - Aqua-Hot 375-d Service Manual

S
ECTION

Diesel-Burner Controller:

The Aqua-Hot operates on both AC and DC power. Be
sure to disconnect the 120 Volt-AC power supply prior to
servicing. Failure to do so could result in serious personal
injury, electrical shock, or even death!
Function:
The Diesel-Burner Controller operates and monitors the Diesel-
Burner's components and safely shuts the Aqua-Hot off in the
event of an overheat, flame-out, or low-voltage condition.
Function: Replacement Indicator
If the Controller is damaged, or fails to function properly
Replacement Procedure:
NOTE: The Diesel-Burner does not need to be detached from
the Aqua-Hot for this replacement procedure.
1. Locate the Diesel-Burner's white, electrical plug connec-
tion to the Diesel-Burner Controller, then press back on the
two tabs securing the two connections together. Next, pull
the two electrical plug connections completely apart.
8: D B
IESEL URNER
®
© 2009 Aqua-Hot 375D Hydronic Heating System Service Manual—Rev. A
C
OMPONENTS AND
NOTE: At this time, both of the Diesel-Burner Controller's
white, electrical plugs should be detached.
2. Locate the white, electrical plug connecting the Diesel-
Burner Controller to the Aqua-Hot's wiring harness, then
press back on the two tabs securing the two connections
together. Next, pull the two electrical plug connections
completely apart releasing all of the Diesel-Burner Con-
troller's wires.
3. Remove the two screws securing the Diesel-Burner Con-
troller to the Aqua-Hot.
4. Remove the defective Diesel-Burner Controller from the
Aqua-Hot.
5. Align the replacement Diesel-Burner Controller to the Aq-
ua-Hot and reinstall the two screws previously removed,
tightening firmly.
6. Connect the Aqua-Hot and Diesel-Burner Controller's
white, electrical connections together and press down on
the tabs to secure them together.
7. Connect the Diesel-Burner and Diesel-Burner Controller's
white, electrical connections together and press down on
the tabs to secure them together.
Figure 88
R I
EPAIR NFORMATION
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