Aqua-Hot™ Hydronic Heating System Owner’s Manual 07/04
1.0 Aqua-Hot Overview
The Aqua-Hot Heating System is an on-board Hydronic Heating System
(heating with hot water) that provides a continuous, on-demand supply of
domestic hot water, as well as interior zone heating where and when it is
needed. Both heating features are accomplished by a unique VDC-Powered
Diesel-Fired Burner and two VAC-Powered Electric Heating Elements (120
VAC and 240 VAC). These two heating sources maintain the temperature of
the Aqua-Hot's solution of water and antifreeze. In addition, the Aqua-Hot has
been designed to preheat the vehicle's engine prior to starting. This preheat
feature provides an easy engine start-up whenever cool weather conditions
are present. Be sure to review
Figure 1
for complete component overview.
NOTE:
This Aqua-Hot product utilizes an FDA approved GRAS
Propylene Glycol (P.G.) based water and antifreeze solution. This P.G.
based solution is a Boiler type antifreeze, which is Generally Recognized
as Safe (”GRAS”) by the FDA. For additional information regarding this
GRAS antifreeze product, please contact the Technical Support
Department at 1-800-685-4298 or visit the website at
www.vehiclesys.com
SECTION 1: OVERVIEW
Aqua-Hot
Overview
Aqua-Hot
Overview
,
continued
Figure 1
SECTION 1: OVERVIEW
ELECTRONIC CONTROLLER
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R
t
o
H
d
l
o
C
Expansion
Tank
Circulation
Pump #3
Engine Preheat
Circulation
Pump
Diesel-Burner
Head
Engine Coolant
Supply
Hot Water
Outlet
(Domestic Water)
Diesel Fuel
Supply
Diesel Fuel
Return
Pressure-Relief
Valve
Cold Water
Inlet
(Domestic Water)
Engine
Coolant
Return
Diesel-Burner
Control
Unit
Mixer
Valve
Electric Heating
Element Access
Panel
Fill / Radiator
Cap
VAC Access
Panel
VAC Service
Input
Thermostat
Access Panel
Marking
Plates
Hour Meter
Heating Zones
Status
#5
#4
#3
#2
#1
Electric Heating
Element Status
Low Voltage
Reset
Low Tank-Level
Cutoff
Heating Status
Engine Preheat
Pump
Low Battery
Voltage Fault
Low Temp
Cutoff Status
Overload Fault
Pump #2
Pump #1
Pump #3
Diesel-Burner
Status
Motor Coach Heating Specialists
Electronic
Controller
Switch Panel
Circulation
Pump #2
Circulation
Pump #1
Heating Zones
Supply and Return
Ports
Boiler Tank
Drain Valve
Diesel
Electric
Engine
Preheat
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SECTION 1: OVERVIEW
Page 1
