Aqua-Hot 375-d Service Manual page 37

If no continuity exists follow the instructions in this
section to replace the electric heating element.
Replacement Procedure:
F
AILURE TO DISCONNECT ALL POWER SUPPLIES AND
TO ALLOW THE HEATER TO COOL BEFORE SERVICING
COULD CAUSE SERIOUS DAMAGE OR PERSONAL INJURY
1. Ensure that the Aqua-Hot has been completely shut
down and that all power sources have been disconnect-
ed. Also, because this replacement procedure will in-
volve the boiler tank and the potential for hot coolant, be
sure the heater has adequately cooled.
2. Drain the antifreeze and water heating solution from the
Aqua-Hot's boiler tank using the drain valve.
3. Remove the diesel Burner. Reference Section 7.
4. Remove the two wires secured to the defective electric
heating element by cutting them with wire cutters.
.
®
© 2009 Aqua-Hot 375D Hydronic Heating System Service Manual—Rev. A
S
ECTION
5. Using a 7/8 inch socket, remove the defective electric
heating element from the Aqua-Hot's boiler tank.
6. Wrap the new electric element threads with Teflon tape.
7. Install the replacement 1500-watt electric heating ele-
ment into the boiler tank .
/
OR
8. Connect the wires removed from the defective electric
heating element to the replacement electric heating ele-
ment utilizing crimp terminals.
9. Reinstall the diesel burner.
10. Refill the Aqua-Hot's boiler tank with the antifreeze
and water heating solution. Reference Section 5.
11. Test for proper operation.
Figure 21
4: A -H C
QUA OT OMPONENTS
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