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Aqua-Hot™ Hydronic Heating System Owner’s Manual  07/04

activate both the 120 VAC / 1650 Watt and 240 VAC / 4500 Watt Electric Heating

Elements and the indicator lights located on both the Electric and High / Low 

switches.  Allow 0.5-1 hour for the Aqua-Hot System to reach operating temperature.

Also, please note that the Electric Heating Element(s) are the 

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).

Heat

Sources

,

continued

NOTE:  

In order to operate both Electric Heating Elements, you will either

need a 50-AMP Shore Power electrical source, or your Generator must be

capable of producing the necessary VAC electrical power requirements.

Please contact your specific motorhome manufacturer for information

regarding the specifics of your motorhome’s electrical system.

SECTION 2:  ACTIVATING THE AQUA-HOT’S HEAT SOURCES

NOTE:  

Both the Diesel-Burner and the Electric Heating Element(s) are

thermostatically controlled.  Either, or both, heating sources will 

automatically maintain the temperature fo the Aqua-Hot’s water and

antifreeze solution between approximately 160-190 (+/-5) degrees

Fahrenheit.  Therefore, in order 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.

SECTION 3:  OPERATING INSTRUCTIONS

Comfort

Control

3.1  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 Aqua-

Hot’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.

Page  3

Summary of Contents for AHE-120-04X

Page 1: ...Aqua Hot Hydronic Heating System Owner s Manual 07 04 OWNER S MANUAL Model Number AHE 120 04X 12 VDC...

Page 2: ...l Address Motorhome Model Date of Purchase Motorhome Aqua Hot Model No reference Figure 1 Marking Plate Aqua Hot Serial No reference Figure 1 Marking Plate Vehicle Systems Warranty Department 15549 Ea...

Page 3: ...em 4 3 4 Diesel Burner Component Overview 5 3 5 Diesel Burner Operational Flow Chart 5 3 6 Precautions 6 Section 4 Maintenance 4 1 Maintenance Schedule 7 Section 5 Winterization 5 1 Domestic Hot Water...

Page 4: ...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 Aq...

Page 5: ...1 800 685 4298 By Vehicle Systems Inc Ft Lupton CO 80621 Manufactured Date Box Serial Number Box Model Number Box SECTION 1 OVERVIEW Figure 2 2 1 Activating the Aqua Hot Heating System Diesel Burner T...

Page 6: ...rner and the Electric Heating Element s are thermostatically controlled Either or both heating sources will automatically maintain the temperature fo the Aqua Hot s water and antifreeze solution betwe...

Page 7: ...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 coo...

Page 8: ...lling for heat will the Motor 2 begin to operate Operation sequence once the Aqua Hot s Diesel switch is turned ON NOTE The Diesel switch s Indicator Light will illuminate reference Figure 3 while the...

Page 9: ...esel Burner will automatically turn back ON once the coolant temperature reaches the preset temperature of approximately 160 5 degrees Fahrenheit The Motor 2 will continue to run for approximately thr...

Page 10: ...plenishing fill the Aqua 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 s...

Page 11: ...quate 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 ext...

Page 12: ...te by unscrewing the four cover screws C Remove the Aqua Hot s Access Cover and check for loose plug connec tors on the Diesel Burner s Control Unit located on the under side reference Figure 1 D Chec...

Page 13: ...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 th...

Page 14: ...ng supplied to the Aqua Hot s Boiler Tank NOTE The Aqua Hot s VDC VAC Control Thermostat will automatically activate the Diesel Burner and or the Electric Heating Element s only if the Diesel and or E...

Page 15: ...the Heater by the end user This warranty does not apply to damage or failure of the AQUA HOT Heater or the vehicle into which it was installed due to improper installation assembly maintenance abuse...

Page 16: ...Aqua Hot Hydronic Heating System Owner s Manual 07 04 Date Service Performed Service Center OWNER S SERVICE LOG Date Service Performed Service Center OWNER S SERVICE LOG Continued...

Page 17: ...Aqua Hot Hydronic Heating System Owner s Manual 07 04 MEMO...

Page 18: ...s Manual 07 04 Aqua Hot Motor Coach Heating System Owner s Manual 08 03 15549 East Highway 52 Fort Lupton Colorado 80621 1 800 685 4298 Fax 303 857 9000 Copyright 2003 Vehicle Systems Inc All rights r...

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