Hydro-Hot Hydronic Heating System Owner’s Manual 08/04
®
1.0 Activating the Hydro-Hot Heating System
The Hydro-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 a VAC-Powered Electric Heating Element (120 VAC).
These two heating sources maintain the temperature of the Hydro-Hot's
solution of water and antifreeze. In addition, the Hydro-Hot has been designed
to preheat the vehicle's engine prior to starting
(HHE-200 Model Only)
. This
preheat feature provides an easy engine start-up whenever cool weather
conditions are present. Be sure to review
Figure 1A
and
1B
for complete
component overview.
NOTE:
This Hydro-Hot product utilizes a 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 us at 1-800-685-4298 or visit our website at
www.vehiclesys.com
.
SECTION 1: OVERVIEW
Hydro-Hot
Overview
Figure 1A
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
t
o
H
d
l
o
C
Expansion
Tank
VDC High-Limit
Thermostat
VDC / VAC Control
Thermostat
Diesel Fuel
Return
Diesel Fuel
Supply
Circulation
Pump #1
Diesel-Burner
Control
Unit
Diesel-Burner
Head
Circulation Pump #3
/ Stir Pump
Access Panel
Electric Heating Element
/ VAC High-Limit
Thermostat
VAC Internal
Service Input
Float Switch
VAC External
Service Input
Circulation Pump #1
"Supply Port"
Circulation Pump #2
"Supply Port"
Fill / Radiator
Cap
Switch Panel
Electronic
Controller
B-Plug
Harness
Component
Harness
Circulation
Pump #2
Marking Plate (#2)
Boiler Tank
Drain Valve
Marking Plate (#1)
Page 1
