— Page 32 —
© 2008 Aqua-Hot
®
450-DE/DM Hydronic Heating System Installation Manual
Reset Button
(Secondary
Power Source)
12 Volt-DC Screw
Terminal
(Primary
Power Source)
12 Volt-DC Screw
Terminal
Ground Wire
Screw Terminal
Terminal
Strip/Plug
Pin Jumper
Electronic Controller Board
To Motorhome
From Hydronic Heating
System Wiring Harness
Wire
Loom
Wire
Loom
Section 9: Electronic Controller Wiring
Figure 44
Electronic Controller Wiring:
NOTE:
Please reference Appendix A for specific wiring
information.
Most electronic controller thermostat and switch
connections possess an “(I)” or an “(O)” symbol.
The “(O)” symbol indicates a positive 12 Volt-DC
output
to a particular thermostat or switch, while the
“(I)” symbol indicates a positive 12 Volt-DC
input
signal from a particular thermostat or switch. The 12
Volt-DC
output
signal is always present as long as the
electronic controller is powered by a 12 Volt-DC power
source, while the 12 Volt-DC
input
signal is only
present whenever a switch is activated or whenever a
thermostat is calling for heat. Reference Appendix A.
All electronic controller fan power connections (and
two switch connections) illustrate a “(+)” or a “(-)”
symbol, which indicates that they are polarity-sensitive.
Therefore, be sure to use care when wiring these
particular components to the electronic controller.
Each heating zone “FAN” circuit can supply up to
2.0 Amps of direct current. This 12 Volt-DC power
source allows for multiple Cozy III heat exchangers
to be wired “in-parallel”. Reference Figure 44 and
Appendix A.
NOTE:
A maximum power consumption of 24 Watts can be
supplied by the electronic controller for each “FAN”
heating zone.
Heating Zone 1 is reserved electrically for the “Living
Room/Kitchen Heating Zone” (Heating Loop 1)
ONLY,
and Heating Zones 2, 3, and 4 are reserved
electrically for the “Bathroom, Fresh Water Tank, and
Bedroom Heating Zone” (Heating Loop 2)
ONLY
.
Heating Zone 5 is reserved electrically for the
“Optional Heating Zone” (Heating Loop 1)
ONLY
.
All switch connections are to be wired directly to the
Aqua-Hot’s interior switch panel. Reference Figures 44
and 44 and Appendix A. Both the “IND-LT (+) B3”
and the “IND-LT(-) B6” connections on the electronic
controller are reserved electrically
ONLY
for the
diesel-burner switch indicator light connections.
The Aqua-Hot’s electronic controller is designed to
work with most electronic room thermostats; however,
the chosen thermostat must produce a constant 12
Volt-DC output signal and must receive its 12 Volt-
DC power supply from the electronic controller (i.e.,
“THERM-O”) in order to ensure that the thermostat
and electronic controller are properly
fuse protected
.
Summary of Contents for 450-DE Series
Page 1: ...Installation Manual 2008 Aqua Hot Heating Systems Inc...
Page 43: ...Appendix B Appendix B Wire Gauge Information...
Page 45: ...Appendix C Appendix C Electronic Controller Features...
Page 48: ...Appendix D Appendix D Antifreeze Types...
Page 50: ...Appendix E Appendix E Antifreeze Mixture Water Quality Recommendations...
Page 52: ...Appendix F Appendix F Antifreeze Terms and Mixture Ratio...
