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© 2011  Aqua-Hot

®

  450-D Hydronic Heating System Owner’s Manual 

General Information 

 
Should the Aqua-Hot Hydronic Heating System fail to 
operate, complete the following checks: 
 
1.  Verify that the Aqua-Hot’s access cover is securely 

installed. The Aqua-Hot Hydronic Heating System 
will not operate if the access cover is not fully in-
stalled. 

 
2.  Ensure that the vehicle’s fuel tank contains a suffi-

cient level of fuel. The Aqua-Hot system will not oper-
ate if the fuel level is at or below 1/4 tank. 

 
3.  Ensure that the Aqua-Hot’s boiler tank has an ade-

quate supply of antifreeze and water heating solution 
by checking the level at the expansion tank.  If the 
level is low, reference the maintenance section of 
this manual for refilling instructions. 

 
4.   Check the Aqua-Hot’s electronic controller for any 

RED lights indicating a fault condition. 

 
If the Aqua-Hot Heating System’s failure to operate is not 
resolved with the aforementioned checks, please contact 
the Aqua-Hot Heating Systems Technical Support De-
partment at 

1-800-685-4298

 for additional assistance or 

visit the web site at 

www.aquahot.com. 

 

If the Aqua-Hot’s diesel-burner switch “Indicator Light” 
does not illuminate, and the diesel-burner is not function-
ing, locate the electronic controller and check the follow-
ing: 
 
1.  Check the Aqua-Hot’s electronic controller for any 

RED lights indicating a fault condition. Reference 
figure 11. 

 
2.  Check for loose wire connections on the electronic 

controller’s terminal strips/plugs. When checking for 
loose terminal strips/plugs, remove the electronic 
controller faceplate by unscrewing the four cover 
screws. 

 
3.  Remove the Aqua-Hot’s access cover and check for 

loose plug connections on the diesel-burner control-
ler unit. Reference figure 2. 

4.  Ensure the vehicle’s fuel tank has a sufficient level of 

fuel. 

 
5.  If the Aqua-Hot still fails to operate, please contact 
 

the Aqua-Hot Heating Systems Technical Support 
Department at 

1-800-685-4298

 or visit the web site 

at 

www.aquahot.com

 

T

ROUBLESHOOTING

 

Electronic Controller Diagnostic 
 
Low Tank-Level Cutoff Indicator Light 
 

This indicator light will illuminate RED when either the 120 
Volt-AC electric heating element and/or diesel-burner have 
automatically shut down due to a low antifreeze and water 
heating solution level inside the Aqua-Hot’s boiler tank. 
This fault will automatically reset when the low level condi-
tion is corrected. 
 

Low Battery Voltage Fault Indicator Light 
 

This indicator light will illuminate RED and the diesel-burner 
will shut down whenever the 12 Volt-DC voltage level is too 
low for the Aqua-Hot to operate properly. This fault must be 
manually reset after the voltage level has been restored to 
the 12-Volt-DC battery system. Reference the 

Low  

Voltage

 information below. 

 

Low Voltage Fault Indicator Light and Reset Button 
 

The Aqua-Hot’s electronic controller must be manually re-
set whenever the low battery voltage fault indicator light 
has been activated. The electronic controller can be reset 
by turning 

OFF

 the diesel-burner switch on the interior 

switch panel for approximately 60 seconds, then turning the 
switch back 

ON 

by pressing the “Low Voltage Reset” but-

ton located on the electronic controller (use a thin, straight, 
nonmetallic object to access the reset button through the 
small hole in the faceplate). 

Figure 11 

NOTE: 

An interlock switch prevents the Aqua-Hot from  

operating when the cover is not installed and properly 
in place. 

Содержание 450 D

Страница 1: ...OWNERS MANUAL 2011 Aqua Hot Heating Systems Inc 450 D ...

Страница 2: ... Page 2 2011 Aqua Hot 450 D Hydronic Heating System Owner s Manual ...

Страница 3: ...es your RV experience feel much more like home Comfort Zone 4 Low Emissions Aqua Hot s new low emission systems are fumeless and odorless It s good for you good for your neighbor and good for the environment Comfort Zone 5 Over 160 Factory Trained Service Centers You won t need to service your Aqua Hot often but when you do you can be confident in our Certified Service Centers that are close by an...

Страница 4: ...winterize the Aqua Hot when freezing temperatures are present if the Aqua Hot is turned off This includes when the coach is being used and the electrical element and diesel burner switch are in the off position or when the coach is in stor age Not winterizing the Aqua Hot when the aforementioned conditions are present will result in serious damage to the Aqua Hot s Domestic Water Heating System re...

Страница 5: ...tifreeze and Water Heating Solution Page 12 Annual Maintenance Page 12 Winterization Winterizing the Domestic Water Heating System Page 13 De Winterizing the Domestic Water Heating System Page 13 Troubleshooting General Information Page 14 Diesel Burner Blinking Fault Indicator light Page 14 Appendices Appendix A Antifreeze Types Page 16 Appendix B Antifreeze Mixture Water Quality Recommendations ...

Страница 6: ... Burner The Aqua Hot s most powerful heat source provides all of your heating and hot wa ter needs in really cold temperatures or when dry camping You can even combine power sources TribridHot It s technology at it s warmest This manual should be maintained in legible condi tion and kept in a safe easily accessible location for future reference Please read the complete Owner s Manual prior to oper...

Страница 7: ...Port Product I D Label Zone 1 Circulation Pump Zone 2 Circulation Pump Drain Valve Interlock Switch Diesel Burner Diesel Burner Controller Back of Unit Figure 2 Domestic Hot Water Outlet Engine Preheat Inlet From Engine Engine Preheat Circulation Pump Engine Preheat Outlet To Engine Domestic Cold Water Intlet ...

Страница 8: ...Zone Return Ports Product I D Label Air Release Valve Expansion Tank Wiring Harness Port Diesel Fuel Inlet Outlet Ports Heating Zone Outlet Ports AC Wiring Port Heating Zone 1 Outlet Port Heating Zone 2 Outlet Port AC Junction Box Wire Harness Harness Port Zone 1 Circulation Pump Zone 2 Circulation Pump Interlock Switch ...

Страница 9: ...eratures exist and or when there is a high demand for domestic hot water Electric Heating Element Turn the Electric switch ON reference Figure 5 This pro cedure will activate the 120 Volt AC Electric Heating Ele ment and the indicator light located adjacent to the Elec tric switch Allow 1 2 hours for the Aqua Hot System to reach operating temperature Engine Preheat Element In order to use the Engi...

Страница 10: ...up ply of domestic hot water will be present within a few seconds This hot water feature is continuous and is accomplished by the Aqua Hot s Domestic Water Heat ing System The Diesel Burner switch on the Interior Switch Panel must be ON in order to obtain a continu ous supply of hot water e g during showers be sure to also activate the Electric Element switch for maxi mum hot water capacity Refere...

Страница 11: ...at calls for heat The heated antifreeze and water heating solution flows through the Hydronic Heat ing System transferring heat to the heat exchanger which is then transferred to the surrounding zone A hot water faucet e g kitchen sink shower etc is opened Continuous hot water is supplied to the faucet Engine Preheat switch on the Interior Switch Panel is activated The engine s coolant is circulat...

Страница 12: ...enance To keep the Aqua 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 ref erence Figure 9 To ensure maximum Diesel Burner per formance always use the recommended Fuel Nozzle and Fuel Filter when replacing these parts Reference the Aqua Hot s Service and Parts Manual for spare parts in formation and detaile...

Страница 13: ...fill the fresh water stor age tank Open and close all interior and exterior water faucets one at a time until only clear water is present visible Reference Figure 10 If disinfecting the potable water system after de winterizing be sure to follow RVIA s Instructions for Disinfection of Potable Water Systems on Recreation Vehicles These instructions can be obtained by con tacting the Recreational Ve...

Страница 14: ... 3 Remove the Aqua Hot s access cover and check for loose plug connections on the diesel burner control ler unit Reference figure 2 4 Ensure the vehicle s fuel tank has a sufficient level of fuel 5 If the Aqua Hot still fails to operate please contact the Aqua Hot Heating Systems Technical Support Department at 1 800 685 4298 or visit the web site at www aquahot com TROUBLESHOOTING Electronic Cont...

Страница 15: ...e Preheat Pump Indicator Light This indicator light will illuminate GREEN whenever the engine preheat circulation pump is operating Please note that this light will only be active if the engine pre heat switch is ON in conjunction with either the diesel burner and or the electric element switch If this indicator light illuminates RED it indicates an electrical overload condition i e short has occu...

Страница 16: ...onents prematurely Therefore con centrated propylene glycol should be diluted with dis tilled de ionized or soft water which is 80 ppm or less in total hardness The local water agency should have up to date water quality reports which should indicate if the local tap water is within this guideline APPENDIX A ANTIFREEZE TYPES The following information addresses the necessary us age of a propylene g...

Страница 17: ...heating system from corrosion and rust Antifreeze is able to perform this function by the addition of rust and anti corrosive inhibitors which are designed specifically to activate in a water solution Summary Antifreeze solution has three basic functions freeze protection boil over protection and anti corrosion and rust protection PPG Antifreeze solution is also primarily responsible for heat tran...

Страница 18: ...onic Heating System Owner s Manual Figure 1 Eyepiece Calibration Screw Daylight Plate Assembly Main Prism Assembly Calibrate the Refractometer Aqua Hot Part Number MSX 907 162 APPENDIX D MEASURING PROPYLENE GLYCOL USING A REFRACTOMETER ...

Страница 19: ...ple to rest on the prism for approxi mately 30 seconds before going to step 2 This allows the sample to adjust to the ambient temperature of the refractometer 2 Hold daylight plate in the direction of a light source and look into the eyepiece You will see a circular field with gradua tions down the center you may have to focus the eyepiece to clearly see the graduations The upper portion of the fi...

Страница 20: ... Page 20 2011 Aqua Hot 450 D Hydronic Heating System Owner s Manual Date Service Performed Service Center OWNER S SERVICE LOG ...

Страница 21: ... Page 21 2011 Aqua Hot 450 D Hydronic Heating System Owner s Manual Date Service Performed Service Center OWNER S SERVICE LOG Continued ...

Страница 22: ... Page 22 2011 Aqua Hot 450 D Hydronic Heating System Owner s Manual This area provided for notes ...

Страница 23: ...age or for six months whichever is greater The intent of this warranty is to protect the Heater s end user from such defects which would occur in the manufacturing of the product Thus problems due to improper specifications improper installations improper use the use of accessory parts or parts not authorized by Aqua Hot Heating Systems Inc repair by unauthorized persons and damage or abuse of the...

Страница 24: ...15549 East Highway 52 Fort Lupton CO 80621 800 685 4298 Fax 303 857 9000 www aquahot com LTE 907 601 ...

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