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Connecting the 12 Volt-DC Power:
DO NOT connect the 12 Volt-DC power to the Aqua-Hot if
the vehicle requires welding. Electrical welding will cause serious
damage to the diesel-burner controller.
The Aqua-Hot is designed to shut down in the event
that the DC voltage level drops too low to properly
operate, it is imperative that the proper wire gauge be
determined and utilized. Reference Appendix B for
proper wire-gauge sizing. Please note that under full-
load conditions, the Aqua-Hot can draw as much as 22
amps of DC current.
Be sure to protect against accidental shorting (i.e., chas-
sis shorting) by incorporating a 25-Amp rated in-line
fuse into the power wire at the battery location. Refer-
ence Figure 47.
1. Run and connect two wires –– one red (+) wire and
one black (-) wire (power and ground), from the ve-
hicle's battery to the Aqua-Hot's electronic controller.
Reference Appendix A and Figure 47.
2. Label the wires indicating whether they are a power or a
ground wire.
3. Attach the VDC power wires onto the appropriate ter-
minal/battery connections on the electronic controller.
Reference Appendix A.
4. Connect both power and ground wires directly to the
vehicle's batteries.
Figure 47
NOTE: If the optional power connection is used, remove the jumper
Positive/Power
Negative/Ground
Section 9: Electronic Controller Wiring
plate from the two power terminals - "JP5" and "JP8".
Optional connection to the
house battery disconnect
In-line
Fuse
NOTE: Reference Appendix A
for specific electronic
controller wiring
details.
© 2008 Aqua-Hot
®
450-DE/DM Hydronic Heating System Installation Manual
DO NOT activate the diesel-burner until the antifreeze and
water heating solution has been added to the boiler tank
and the heating system has been completely bled of air.
Operating the Aqua-Hot without the antifreeze and water
heating solution will cause serious damage to the Aqua-
Hot's boiler tank.
Connecting the 120 Volt-AC Power:
1.
Route and insert three 120 VAC power source wires
into the AC terminal block through the AC wiring
port's cable clamp fitting and into the proper terminal.
Reference Appendix A and Figure 46.
2.
Secure the wires into their terminals by tightening the
corresponding screw on the terminal block. Reference
Appendix A.
AC Wiring
Port
AC Terminal
Block
Figure 46
— Page 34 —
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