OWNER`S MANUAL

R
OWNER’S MANUAL
Model Number
HHE-200-09E - 12 VDC.
HHE-500-09M - 12 VDC.
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
OWNER’S INFORMATION
Owner’s Name:
Address:
CUT HERE AND MAIL IN
City:
State:
Zip Code:
Telephone:
E-mail Address:
Motorhome Model:
Date of Purchase (Motorhome):
Hydro-Hot Model No. (reference Figure 1 “Marking Plate”):
Hydro-Hot Serial No. (reference Figure 1 “Marking Plate”):
Please Mail To:
Vehicle Systems’ Warranty Department
15549 East Highway 52
Ft. Lupton, CO 80621
Vehicle Systems, Inc.
Warranty Department
15549 East Highway 52
Ft. Lupton, CO 80621
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
TABLE OF CONTENTS
Section 1
Overview
1.0
Section 2
Operating Instructions
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Section 3
Maintenance Schedule ........................................................7
Winterization
4.1
Section 5
Activating the Hydro-Hot Heating System ........................... 2
Zone Thermostat(s) Operation ........................................... 3
Using the Domestic Hot Water System .............................. 3
Using the Engine Preheat System ..................................... 4
Diesel-Burner Component Overview.................................. 5
Diesel-Burner Operational Flow-Chart ................................5
Precautions .........................................................................6
Maintenance
3.1
Section 4
Hydro-Hot Overview ........................................................... 1
Domestic Hot Water System ...............................................8
Troubleshooting
5.1
5.2
General Information .............................................................9
Electronic Controller Diagnostic ..........................................9
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
SECTION 1: OVERVIEW
Hydro-Hot
Overview
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.
Electronic
Controller
Switch Panel
Motor Coach Heating Specialists
Low Tank-Level
Cutoff
Electric Heating
Element Status
Low Voltage
Heating Status
Reset
Engine Preheat
Pump
#5
#4
Expansion
Tank
Pump #1
Heating Zones
Status
#3
Pump #2
#2
#1
Pump #3
Low Battery
Voltage Fault
Diesel-Burner
Status
Low Temp
Cutoff Status
Overload Fault
Ho
t
Circulation Pump #2
"Supply Port"
Co
ld
Fill / Radiator
Cap
Circulation Pump #1
"Supply Port"
B-Plug
Harness
Component
Harness
VAC External
Service Input
Float Switch
VAC Internal
Service Input
Marking Plate (#1)
VDC High-Limit
Thermostat
Marking Plate (#2)
Access Panel
Electric Heating Element
/ VAC High-Limit
Thermostat
VDC / VAC Control
Thermostat
Diesel Fuel
Return
Circulation
Pump #1
Diesel Fuel
Supply
Boiler Tank
Drain Valve
Circulation Pump #3
/ Stir Pump
Diesel-Burner
Head
Circulation
Pump #2 Diesel-Burner
Control
Unit
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Figure 1A
Page 1
SECTION 1: OVERVIEW
Hydro-Hot
Overview,
continued
REAR VIEW
Low-Temp
Cutoff Thermostat
Engine Preheat
"IN" Port
Hour Meter
Mixer Valve
Circulation Pump #1
"Return Port"
Pressure-Relief
Valve
Engine Preheat
Circulation Pump
Circulation Pump #2
"Return Port"
COLD WA
HOT WAT
Domestic ("COLD")
Water Inlet
Engine Preheat
"OUT" Port / Barb
Figure 1B
Domestic ("HOT")
Water Outlet
SECTION 2: OPERATING INSTRUCTIONS
Heat
Sources
Please read the complete Owner’s Manual prior to operating your
Hydro-Hot Heating System. Also, be sure to fill out and mail in your
Owner’s Information Card located at the front of this manual.
2.1 Activating the Hydro-Hot Heating System
Diesel-Burner
Turn the Diesel switch ON, reference Figure 2. This procedure will
activate the Diesel-Burner and the indicator light located on the Diesel
switch. Allow 10-20 minutes for the Hydro-Hot System to reach operating
temperature. Please note that the Diesel-Burner is the primary heat
source for heating both the interior and the domestic hot water (such as
when cool ambient temperatures exist and/or when there is a high demand for domestic hot water).
NOTE: The “Diesel” switch can also be used to reset a 12 Volt-DC Low
Voltage fault. Please reference Section 5.
Electric Heating Element
Turn the Electric switch ON, reference Figure 2. This procedure will
activate the 120 VAC Electric Heating Element and the indicator light
located on the Electric switch. Allow 1-2 hours for the Hydro-Hot System
to reach operating temperature.
Also, please note that the Electric Heating Element is a secondary heat
source for heating both the interior and the domestic hot water during low
heating demand situations (such as when moderate ambient temperatures exist and/or when there is a low demand for domestic hot water).
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 2
SECTION 2: OPERATING INSTRUCTIONS
Heat
Sources,
continued
Comfort
Control
NOTE: Both the Diesel-Burner and the Electric Heating Element are
thermostatically controlled. Either, or both, heating sources will
automatically maintain the temperature of the Hydro-Hot's water and
antifreeze solution between approximately 160-190 (+/- 5) degrees
Fahrenheit. So to heat your motorhome / domestic hot water, simply
choose the desired heat source(s) and leave the switch(s) (i.e. Diesel
and/or Electric) ON.
2.2 Zone Thermostat(s) Operation
Interior Room Thermostats
Simply adjust each Interior Room Thermostat to the desired temperature.
Then whenever an Interior Room Thermostat “calls-for-heat”, the HydroHot’s Circulation Pump(s) and Interior Heat Exchanger Fans will be
activated. These devices together will supply warmth and comfort to each
interior heating zone. Please contact your specific motorhome
manufacturer for the exact location of the Interior Room Thermostat(s).
Fresh Water Tank Thermostat
Simply adjust the Thermostat (i.e. Bay Heating) to approximately 40
degrees Fahrenheit. This will prevent freezing of the domestic water
storage system. Please contact your specific motorhome manufacturer
for the exact location of the Fresh Water Tank Thermostat.
Hot Water
2.3 Using the Domestic Hot Water System
When the Hydro-Hot is at operating temperature, the domestic water is
automatically heated as it is being used. Because the Hydro-Hot does not
store any hot water, simply open any hot water faucet and a continuous
supply of domestic hot water will be present within a few seconds. This
hot water feature is continuous and is accomplished by the Hydro-Hot’s
Domestic Hot Water Heating System. Please note that the Diesel
switch must be ON to get an unlimited supply of hot water (i.e. during
showers).
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 3
SECTION 2: OPERATING INSTRUCTIONS
Hot Water,
continued
Engine
Preheat
NOTE: The Hydro-Hot’s “Domestic Water Priority System” disables
the interior Zone Heating Fans, Zone Circulation Pumps, and the
Engine Preheat Pump (if applicable) whenever domestic hot water is
being used on a continuous basis (i.e. during showers). Once the
demand for continuous domestic hot water ceases the Hydro-Hot
will enable the Fans and Pumps to operate and provide heat to the
Heating Zones. Please note that the Electronic Controller’s Low
Temperature Cuttoff Status indicator light will illuminate GREEN
whenever the Hydro-Hot is able to provide zone heating, reference
Figure 5.
2.4 Using the Engine Preheat System
Engine Preheat (HHE-200 Model Only)
When the Hydro-Hot is at operating temperature, and the Diesel-Burner
and/or the 120 VAC Electric Heating Element switch is ON, follow these
simple instructions:
A. Turn the Hydro-Hot's Engine Preheat switch ON, reference Figure 2.
This procedure will activate the Engine Preheat Circulation Pump and
circulate the engine's coolant through the Engine Preheat System.
This feature will adequately warm the engine for easy start-ups on
cool mornings.
NOTE: Allow approximately 1 to 2 hours of engine preheating run time.
Preheat duration will be shortest when the Diesel switch is ON.
B. Turn OFF the Aqua-Hot's Engine Preheat switch whenever engine
preheating is not desired.
NOTE: The Hydro-Hot's Engine Preheating System acts as a supplemental heating source, in addition to the Diesel-Burner and the Electric
Heating Element. While traveling, the engine's heated coolant will automatically pass through the Engine Preheat / Motoraide System, transferring heat into the Hydro-Hot's Boiler Tank. This design feature reduces the
total operating hours of the Diesel-Burner and the Electric Heating Element.
"Y6EHICLE3YSTEMS
Indicator
Light
Diesel
Electric
Engine
Preheat
Figure 2
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 4
SECTION 2: OPERATING INSTRUCTIONS
DieselBurner
Component
Overview
2.5 Diesel-Burner Component Overview
1.
2.
3.
4.
5.
Control Unit
Motor
Ignition Coil
Clutch
Combustion Air Blower
6.
7.
8.
9.
10.
Fuel Solenoid
Electrode Holder
Ignition Electrodes
Fuel Nozzle
Heat Exchanger
11.
12.
13.
14.
15.
16.
Combustion Chamber
Exhaust Port
Flame Sensor
Fuel Pump
Fuel Ports (Supply / Return)
Combustion Air Intake Port,
with Adjustable Shutter
Figure 3
DieselBurner
Operational
Flow-Chart
2.6 Diesel-Burner Operational Flow-Chart
~ Reference Figure 3 for all numbers indicated inside parenthesis. (e.g. #8).
Operation sequence once
the Hydro-Hot’s Diesel
switch is turned ON.
NOTE:
The Diesel switch’s
Indicator Light will
illuminate (reference
Figure 4), while the
Heating Status and
Diesel-Burner Status
lights illuminate on the
Electronic Controller,
reference Figure 5.
The Motor (#2), which
turns the Combustion
Air Blower (#5) and
drives the Fuel Pump
(#14), will begin to
operate.
NOTE:
If the Hydro-Hot’s
coolant temperature is
approximately 190 (+/- 5)
degrees fahrenheit, or
higher, the Motor (#2)
will not operate. Only
when the coolant
temperature has
dropped below 160
(+/- 5) degrees
fahrenheit, and the VDC
/ VAC Control
Thermostat is calling for
heat, will the Motor (#2)
begin to operate.
After approximately 10 - 25
seconds, the Fuel
Solenoid (#6) opens and
fuel is sprayed into the
Combustion Chamber
(#11) through the Fuel
Nozzle (#9).
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Simultaneously the
Ignition Coil (#3)
produces a high voltage
spark across the Ignition
Electrodes (#8), which
ignites the incoming
air-fuel mixture.
Once the ignited air-fuel
mixture (FLAME) is
observed by the Flame
Sensor (#13), the Ignition
Coil (#3) will automatically
switch OFF. The
combustion process now
continues to operate
unassisted.
Page 5
SECTION 2: OPERATING INSTRUCTIONS
DieselBurner
Operational
Flow-Chart,
continued
2.6 Diesel-Burner Operational Flow-Chart, continued
The combustion process will
continue to operate in this
manner until one of the following
take’s place:
A.) The VDC / VAC Control
Thermostat, which senses
coolant temperature, reaches the
preset temperature of
approximately 190 (+/- 5)
degrees fahrenheit.
NOTE:
If process "A" occurs, the
Heating Status and DieselBurner Status lights on the
Electronic Controller will go
OFF, reference Figure 5.
B.) The Hydro-Hot’s Diesel
switch is turned OFF.
NOTE:
If process "B" occurs, the Diesel
switch’s Indicator Light, on the
Switch Panel (reference Figure
2), will go OFF along with the
Heating Status and DieselBurner Status lights on the
Electronic Controller, reference
Figure 5.
Important
Information
Once the heater switches
OFF, thermostatically or
manually, the Fuel
Solenoid (#6) closes,
which interrupts the supply
of diesel fuel to the Fuel
Nozzle (#9).
The Motor (#2) will
continue to run for
approximately three (3)
additional minutes. This
process is refered to as
the purge-cycle, which
cools down the heater’s
internal components
and purges the
Combustion Chamber
(#11) of any residual
exhaust gases.
NOTE:
When the Hydro-Hot’s
Diesel-Burner is switched
OFF, by the VDC / VAC
Control Thermostat, the
following process will take
place:
1.) The Motor (#2) will
shut-off once the three (3)
minute purge-cycle has
expired.
-THEN2.) The Hydro-Hot’s
Diesel-Burner will
automatically turn back ON
once the coolant
temperature reaches the
preset temperature of
approximately 160 (+/- 5)
degrees fahrenheit.
SUMMARY:
The Hydro-Hot’s DieselBurner is in stand-by
mode anytime the operator
activates the Diesel switch
(reference Figure 2) to the
ON position. The DieselBurner will then
automatically ignite and
maintain the coolant
temperature in the HydroHot’s Boiler Tank without
additional involvement
from the operator.
2.7 Precautions
WARNINGS:
• The Hydro-Hot's Exhaust is HOT!
• DO NOT park in areas where dry conditions exist underneath the
vehicle, as a fire may result (i.e. in a dry grassy field for example).
• DO NOT operate the Hydro-Hot’s Diesel-Fired Burner inside an
enclosed building.
• The Heater should be switched OFF when refueling.
CAUTION: DO NOT operate the Diesel-Burner and/or the Electric
Heating Element without the water and antifreeze solution in the HydroHot’s Boiler Tank. Failure to do so will cause serious damage to the
Heater.
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 6
SECTION 3: MAINTENANCE
Upkeep
3.1 Maintenance Schedule
Monthly
Check the Hydro-Hot's solution of water and antifreeze to ensure that it
is at the proper level. Do this by visually checking the coolant level in
the Hydro-Hot's Expansion Tank, reference Figure 1A. Please note that
the coolant level should be checked only when the Hydro-Hot is at
maximum operating temperature (i.e. when the Diesel-Burner cycles
OFF), “HOT.”
WARNING: When the Hydro-Hot is at maximum operating temperature
(HOT), DO NOT loosen the Radiator Cap. If removed, scalding by hot
vapor or coolant could result.
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.
If the coolant needs replenishing, fill the Hydro-Hot’s Expansion Tank to the
FULL HOT level mark. Be sure to use a 50/50 mixture of water and (P.G.)
antifreeze.
Annually
WARNING: Before cleaning or servicing, disconnect all power supplies.
To keep your Hydro-Hot running smoothly, it is ideal to have the Diesel-Burner
tuned-up annually. A tune-up should consist of a new Fuel Nozzle and Fuel
Filter, along with a thorough cleaning of the Combustion Chamber, if
necessary (reference Figure 4). To ensure maximum Diesel-Burner
performance, always use the recommended Fuel Nozzle (i.e. 0.35 GPH) and
Fuel Filter (i.e. 10 Micron) when replacing these parts. Reference the HydroHot “Parts Manual” for spare parts information. If detailed replacement
instructions are needed, please reference the Hydro-Hot “Shop Manual” for
your specific model of Hydro-Hot, or contact our Technical Department at 1800-685-4298 for the nearest Hydro-Hot Service Center.
CAUTION: DO NOT operate the Diesel-Burner and/or the Electric Heating
Element without the water and antifreeze solution in the Hydro-Hot’s Boiler Tank.
Failure to do so will cause serious damage to the Heater.
Combustion
Chamber
Fuel Filter
(10 Micron)
Fuel Nozzle
(0.35 GPH)
Figure 4
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 7
SECTION 4: WINTERIZATION
Storage
4.1 Domestic Hot Water System
The Hydro-Hot's Domestic Hot Water Heating System must be completely
drained of domestic water any time the heater is stored where freezing
temperatures may be experienced.
CAUTION: Not winterizing your Hydro-Hot, when freezing temperatures
are present, will result in serious damage to the Hydro-Hot's Domestic
Hot Water Heating System.
NOTE: The Hydro-Hot can still be used for interior zone heating even if
the domestic hot water system has been drained and winterized.
Please follow the instructions listed below when winterizing the Hydro-Hot’s
Domestic Hot Water Heating System:
A. Completely drain the fresh water storage tank.
NOTE: If your motorhome is equipped with appliances that use fresh
water (i.e. ice makers, water purifiers, etc.) follow the manufacturer's
recommendation for winterization.
B. Disconnect the domestic water demand pump's suction line from the
fresh water storage tank.
C. Attach an adequate piece of hose onto the suction side of the domestic
water demand pump.
D. Place the opposite end of the hose into an adequate supply of FDA
approved RV-Antifreeze.
E. Open / close all interior and exterior water faucets, one at a time, until
only pure RV-Antifreeze is present. Perform this procedure for both the
hot and cold faucets.
F. Remove the hose and reconnect the domestic water demand pump's
suction line to the fresh water storage tank.
G. Disconnect all electrical power supplies to the Hydro-Hot during storage.
NOTE: For de-winterization, completely fill the fresh water storage tank.
Open / close all interior and exterior water faucets, one at a time, until only
clear water is present / visible.
CAUTION: If you’re disinfecting your potable water system, after dewinterizing, be sure to follow RVIA’s “Instruction for Disinfection of
Potable Water Systems on Recreation Vehicles.” These instructions
can be found in the ANSI A119.2 Handbook for Recreational Vehicle Standards. To receive a copy of this RVIA Standard, write to: Recreation
Vehicle Industry Association, 1896 Preston White Drive, P.O. Box
2999, Reston, VA 20195-0999, or visit the RVIA website at www.rvia.com.
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 8
SECTION 5: TROUBLESHOOTING
General
Information
5.1 General Information
If the Hydro-Hot’s Diesel switch “Indicator Light” does not illuminate, and
the Diesel-Burner is not functioning, locate the Electronic Controller (Figure
5) and check the following:
A. Check the Hydro-Hot’s Electronic Controller for any RED lights indicating
a fault condition. Reference Figure 5 and the Electronic Controller
Troubleshooting section to identify these fault conditions.
B. Check for loose wire connections on the Electronic Controller’s Plug
terminals. When checking for loose plug terminals, remove the Electronic
Controller Faceplate by unscrewing the four cover screws.
C. Remove the Hydro-Hot’s Access Cover and check for loose plug connectors on the Diesel-Burner's Control Unit (located on the under side), see
Figure 1A.
D. Check to ensure that the vehicle’s fuel tank has a sufficient level of fuel.
E. If your Hydro-Hot still fails to operate, please contact our Technical
Support Department at 1-800-685-4298 for additional troubleshooting
assistance or visit our website at www.hydro-hot.com.
Electronic
Controller
5.2 Electronic Controller Diagnostic
ELECTRONIC CONTROLLER
(YDRO (OT
R
Low Tank-Level
Cutoff
Electric Heating
Element Status
Low Voltage
Heating Status
Reset
Engine Preheat
Pump
#5
#4
Pump #1
Heating Zones
Status
#3
Pump #2
#2
#1
Pump #3
Low Battery
Voltage Fault
Diesel-Burner
Status
Low Temp
Cutoff Status
Overload Fault
Figure 5
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 9
SECTION 5:
Electronic
Controller,
continued
TROUBLESHOOTING
Low Tank-Level Cutoff Indicator Light:
This indicator light will illuminate RED when either the 120 VAC Electric Heating Element and/or Diesel-Burner have automatically shutdown due to a low
water and antifreeze solution level inside the Hydro-Hot’s Boiler Tank. This
fault will automatically reset when the low level condition is corrected.
Low Battery Voltage Fault Indicator Light:
This indicator light will illuminate RED whenever the VDC voltage level is too
low for the Hydro-Hot to operate properly. This fault must be manually reset
after the voltage level has been restored to the VDC battery system, see Low
Voltage Reset below.
Low Voltage Reset (Button):
The Hydro-Hot’s Electronic Controller must be manually reset whenever the
Low Battery Voltage fault indicator light has been activataed. The Electronic
Controller can be manually reset either by depressing the “Low Voltage
Reset” button located on the Electronic Controller (use a thin, straight,
nonmetallic object to access the reset button through the small hole in the
faceplate) or by turning OFF the “Diesel” switch on the Heater’s Interior Switch
Panel for approximately 30 seconds, then turning the switch back ON.
Overload Fault Indicator Light:
This indicator light will illuminate RED whenever one of the following conditions
have occurred:
1. The Hydro-Hot is off due to an electrical overload (i.e. short) in the main
VDC power supply circuitry.
2. The Hydro-Hot is off due to a combination of high electrical VDC power
loads and a high surface temperature of the Electronic Controller.
The Hydro-Hot will automatically restart once the electrical overload (i.e.
short) and/or high heat condition is corrected.
Heating Zones Status Indicator Lights:
These five indicator lights (separately) will illuminate GREEN whenever a
Zone Thermostat, for each particular zone, is calling for heat. The GREEN
indicator lights also indicate that VDC power is being supplied to the particular
interior heating zone’s Heat Exchangers (i.e. fan motors). If any of the five
indicator lights illuminate RED, it indicates that an electrical overload condition
(i.e. short) has occurred in a particular heating zone’s circuitry.
NOTE: A short in either a heating zone’s Interior Room Thermostat or
heating zone’s Heat Exchanger circuit, will cause the indicator light to
illuminate RED.
Pumps #1, #2, and #3 Indicator Lights:
These indicator lights (separately) will illuminate GREEN whenever a
Circulation Pump is operating. If any of the three indicator lights illuminate
RED, it indicates that an electrical overload condition (i.e. short) has occurred
in the particular component’s circuitry.
NOTE: The Zone Circulation Pumps #1 and #2 are activated whenever a
Zone Thermostat calls for heat. Pump #3 / Stir Pump is activated
whenever the Domestic Water is being used on a continuous basis.
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 10
SECTION 5:
Electronic
Controller,
continued
TROUBLESHOOTING
Engine Preheat Pump Indicator Light: (HHE-200 Model Only)
This indicator light will illuminate GREEN whenever the Engine Preheat Pump
is operating. Please note that this light will only be active if the Engine Preheat
switch is ON in conjunction with either the Diesel and/or the Electric switch. If
this indicator light illuminates RED, it indicates an electrical overload condition
(i.e. short) has occurred in this particular component’s circuitry.
Heating Status Indicator Light:
This indicator light will illuminate GREEN whenever the Hydro-Hot’s VDC /
VAC Control Thermostat is calling for heat, allowing the water and antifreeze
solution in the Hydro-Hot’s Boiler Tank to be heated by either the DieselBurner and/or the Electric Heating Element. When this indicator light is off, no
heat is being supplied to the Hydro-Hot’s Boiler Tank.
NOTE: The Hydro-Hot’s VDC / VAC Control Thermostat will automatically
activate the Diesel-Burner and/or the Electric Heating Element, only if the
Diesel and/or Electric switch is in the ON position. So to heat your
motorhome / domestic hot water, simply choose the desired heat
source(s) and leave the switch(s) (i.e. Diesel and/or Electric) ON.
Electric Heating Element Status Indicator Light:
This indicator light will illuminate GREEN whenever the Hydro-Hot’s Electric
Heating Element is operating and providing heat to the Hydro-Hot’s Boiler
Tank. Please note that this light will only be active if the Electric switch is in
the ON position. If this indicator light illuminates RED, it indicates an electrical
overload condition (i.e. short) has occurred in the Electric Heating Element’s
VDC powered circuitry.
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Page 11
WARRANTY INFORMATION
- FOR HYDRO-HOT MODELS Vehicle Systems Inc. warrants the HYDRO-HOT Heater to be free from defects in material and
workmanship under normal use and service for a period of two (2) years on both parts and labor
commencing upon the original date of registration of the vehicle. The Warranty period may not
however, exceed 36 months from the orignal date of delivery by Vehicle Systems, Inc. Replacement
parts are warranted for the remainder of the Heater's standard warranty period or for six months
(180 days), whichever is greater.
This warranty is conditional upon proper use of the Heater by the end-user. This warranty
does not apply to damage or failure of the HYDRO-HOT Heater, or the vehicle into which it
was installed, due to improper installation, assembly, maintenance, abuse, neglect, accident, or the use of parts not supplied by Vehicle Systems Inc. Vehicle Systems is not responsible for incidental or consequential damages.
The intent of this warranty is to protect the end-user of the heating system from such defects, which
would occur in the manufacture of the product. The warranty is not intended to protect the end-user
from problems, which are outside the ability of Vehicle Systems’ control.
To obtain warranty repair authorization or for additional product information, please contact our
Technical Support Department at 1-800-685-4298 (8 AM to 5 PM Mountain Standard Time).
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
OWNER’S SERVICE LOG:
Date
Service Performed
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04
Service Center
.PUPS$PBDI)FBUJOH4QFDJBMJTU.BOVGBDUVSFSBOE%JTUSJCVUPS
15549 East Highway 52 · Fort Lupton, Colorado 80621 · 1-800-685-4298 · Fax: 303-857-9000
¢ Copyright 2004 Vehicle Systems, Inc. All rights reserved
www.vehiclesys.com
Hydro-Hot
R
LTE-VHS-225
Motor Coach Heating System Owner's Manual 08/03
Hydro-Hot ® Hydronic Heating System Owner’s Manual 08/04

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