Aqua-Hot 375-LP Owner`s manual

Aqua-Hot 375-LP Owner`s manual
AVERTISSEMENT. Assurez-vous de bien suivre les
instructions données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion ou pour
éviter tout dommage matériel, toute blessure ou la
mort.
WARNING: If the information in these instructions is
not followed exactly, a fire or explosion may result
causing property damage, personal injury, or death.
—
—
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
— Ne pas entreposer ni utiliser d’essence ou ni d’autres
vapeurs ou liquides inflammables à proximité de cet
appareil ou de tout autre appareil.
WHAT TO DO IF YOU SMELL GAS
—
• Evacuate all persons from the vehicle.
• Shut off the gas supply at the gas container or
source.
• Do not touch any electrical switch or use any
phone or radio in the vehicle.
• Do not start the vehicle’s engine or electric
generator.
• Contact the nearest gas supplier or qualified
service technician for repairs.
• If you cannot reach a gas supplier or qualified
service technician, contact the nearest fire
department.
• Do not turn on the gas supply until the gas leak(s)
has been repaired.
—
Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
• Évacuez le véhicule.
• Coupez l’alimentation en gaz au réservoir ou à la
source.
• Ne touchez à aucun interrupteur ; ne pas vous
servir du téléphone ou de la radio du véhicule.
• Ne pas démarrer le moteur du véhicule ni aucune
génératrice électrique.
• Appelez le fournisseur de gaz le plus proche ou un
technicien qualifié.
• Si vous ne pouvez rejoindre ni un fournisseur ni un
technicien qualifié, appelez le service des
incendies le plus proche.
• Ne pas rétablir l’alimentation en gaz tant que la
fuite n’a pas été réparée.
— L’installation et l’entretien doivent être assurés par
un installateur ou un service d’entretien qualifié ou
par le fournisseur de gaz.
OWNERS MANUAL
© 2009 Aqua-Hot Heating Systems Inc.
— Page 2 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
TABLE OF CONTENTS
Introduction
Introduction to the Aqua-Hot Hydronic Heating System ............................................... Page 4
Operating Instructions
Activating the Aqua-Hot Heating System ...................................................................... Page 6
Zone Thermostat Operation ............................................................................................ Page 8
Using the Domestic Water Heating System.................................................................... Page 8
Aqua-Hot Operational Flow-Chart ................................................................................. Page 9
Maintenance
Monthly Maintenance ..................................................................................................... Page 10
Replenishing the Antifreeze and Water Heating Solution .............................................. Page 10
Annual Maintenance ....................................................................................................... Page 10
Winterization
Winterizing the Domestic Water Heating System .......................................................... Page 11
De-Winterizing the Domestic Water Heating System .................................................... Page 11
Troubleshooting
General Information ........................................................................................................ Page 12
Appendices
Appendix A: Antifreeze Types ...................................................................................... Page 12
Appendix B: Antifreeze Mixture Water Quality Recommendations ............................. Page 12
Appendix C: Antifreeze Terms and Mixture Ratio........................................................ Page 13
Warranty
Limited Warranty Statement ........................................................................................... Page 15
— Page 3 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
INTRODUCTION
This manual should be maintained in legible
condition and kept in a safe, easily-accessible location for
future reference.
Please read the complete Owner’s Manual prior to operating the Aqua-Hot Hydronic Heating System. Also, be sure
to fill out and mail in the “Warranty Registration” card
located at the front of this manual.
The Aqua-Hot Heating System is a Hydronic Heating System
(heating with hot water) that provides interior zone heating
where and when it is needed, as well as a continuous, ondemand supply of domestic hot water. Both heating features
are accomplished by a 12 Volt-DC powered Propane-Burner
and a 120 Volt-AC powered Electric Heating Element, which
maintain the temperature of the Aqua-Hot’s antifreeze and water heating solution. Be sure to reference Figures 1-A through 1
-C for a complete component overview.
Danger, Warning, Caution, and Note Boxes:
Danger, Warning, Caution, and Note boxes appear throughout
this manual as a means of alerting the operator to important
information.
INDICATES
NENT.
THAT PERSONAL INJURY IS LIKELY OR IMMI-
Indicates that serious damage to the heater will occur and
personal injury is possible as well.
Indicates that damage to the heater is possible.
NOTE: Indicates information that requires special attention by
the operator.
NOTE: This Aqua-Hot product utilizes a propylene glycol
based antifreeze and water heating solution. This
propylene glycol based solution is a Boiler type antifreeze that is “Generally Recognized as
Safe” (GRAS) by the FDA. For additional information regarding this “GRAS” antifreeze product, please
reference Appendix A, contact the Aqua-Hot Heating
Systems Technical Support Department at
1-800-685-4298, or visit the web site at
www.aqua-hot.com.
Figure 1-A
— Page 4 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
INTRODUCTION
120 Volt-AC
Relay
Zone 1 Relay
Zone 2 Relay
Fuse Block
Ground Strip
Figure 1-B
Interlock Switch
Propane Burner
Controller
Zone 1
Circulation
Pump
Propane Burner
Zone 2
Circulation
Pump
Drain Valve
Figure 1-C
— Page 5 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
OPERATING INSTRUCTIONS
375-LP I.D. Label
The Aqua-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)!
DO NOT operate the Aqua-Hot’s Propane-Burner inside
an enclosed building!
The Heater must be switched OFF when refueling.
DO NOT operate the Propane-Burner and/or Electric Heating
Element without the antifreeze and water heating solution in
the Aqua-Hot’s Boiler Tank. Failure to do so will cause serious
damage to the Heater.
Activating the Aqua-Hot Heating System:
Propane-Burner:
Turn the Burner switch ON; reference Figure 3. This procedure will activate the Propane-Burner and the indicator light
located adjacent to the Burner switch. Allow 10-20 minutes for
the Aqua-Hot System to reach operating temperature. Please
note that the Propane-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).
Electric Heating Element:
Turn the Electric switch ON; reference Figure 3. This procedure will activate the 120 Volt-AC Electric Heating Element
and the indicator light located adjacent to the Electric switch.
Allow 1-2 hours for the Aqua-Hot System to reach operating
temperature.
Indicator
Light
Figure 2
Figure 3
— Page 6 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
— Page 7 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
OPERATING INSTRUCTIONS
Zone Thermostat Operation
Interior Room Thermostat:
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 and Interior
Heat Exchanger Fans will be activated. These devices, together, will supply warmth and comfort to each interior heating zone. The Aqua-Hot must be at operating temperature in
order for the zones to function. Please contact the specific
motorhome manufacturer for the exact location of the Interior
Room Thermostats.
Indicator
Light
Fresh Water Tank Thermostat:
Simply adjust the Thermostat for Bay Heating to a minimum
of 40°F. This will prevent freezing of the domestic water
storage system. Please contact the specific motorhome manufacturer for the exact location of the Fresh Water Tank Thermostat.
Using the Domestic Water Heating System
Burner switch must
be ON to obtain a
continuous supply of
hot water.
Activate the Electric
switch for maximum
hot water capacity.
Figure 4
When the Aqua-Hot is at operating temperature, the domestic
water is automatically heated as it is being used. Because the
Aqua-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 Aqua-Hot’s Domestic
Water Heating System. The Propane-Burner switch on the
Interior Switch Panel must be ON in order to obtain a continuous supply of hot water (e.g., during showers); be sure to
also activate the Electric Element switch for maximum hot
water capacity. Reference Figure 4.
NOTE: The Aqua-Hot’s “Domestic Water Priority System”
disables the interior zone heating fans and the zone
circulation pumps whenever domestic hot water is
being used on a continuous basis (e.g., during showers). Once the demand for continuous domestic hot
water ceases, the Aqua-Hot will enable the fans and
the pumps to operate and provide heat to the Heating
Zones.
NOTE: Both the propane-burner and electric heating element are thermostatically controlled. Either, or both,
heating sources will automatically maintain the temperature of the Aqua-Hot’s antifreeze and water
heating solution between approximately 160⁰F and 190⁰F(±5). Therefore, to heat the motorhome/
domestic hot water, simply choose the desired heat source(s) and leave the switch(es) (i.e., Burner and or Electric Element) ON.
— Page 8 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
OPERATING INSTRUCTIONS
Aqua-Hot Operational Flowchart
Heat source is selected from the
Interior Switch Panel.
Propane-Burner is activated
by the Burner switch.
Electric Heating Element is
activated by the Electric
The Boiler Tank heats the
antifreeze and water heating
solution to 190*F.
Heating Zone Thermostat
calls for heat.
The heated antifreeze and water heating
solution flows through the Hydronic Heating System transferring heat to the heat
exchanger, which is, in turn, 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.
The cooled antifreeze and water heating
solution is returned to the boiler tank to
be reheated.
— Page 9 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
MAINTENANCE
WHEN THE AQUA-HOT IS AT MAXIMUM OPERATING TEMPERATURE, THE COOLANT WILL BE VERY HOT! IF THE
AQUA-HOT’S HEATING SYSTEM IS ACCESSED, SCALDING BY
HOT VAPOR OR COOLANT COULD RESULT!
BEFORE CLEANING OR SERVICING, DISCONNECT ALL POWER
SUPPLIES!
DO NOT operate the Propane-Burner and/or the Electric
Heating Element without the antifreeze and water heating
solution in the Aqua-Hot’s Boiler Tank; doing so will cause
serious damage to the Heater.
ratio of antifreeze to water, the proper type of antifreeze, and
the water quality recommendations for the Aqua-Hot Hydronic
Heating System’s antifreeze and water heating solution.
Annual Maintenance:
No annual maintenance is required above the normal monthly
maintenance. Reference the Aqua-Hot’s Service and Parts
Manual for spare parts information and detailed replacement
instructions, contact the Aqua-Hot Heating Systems Technical
Support Department at 1-800-685-4298 for assistance or to
locate the nearest Aqua-Hot Service Center, or visit the Web
site at www.aqua-hot.com.
Propylene Glycol that is “Generally Recognized As Safe”
by the FDA must be utilized for the antifreeze and water
heating solution.
NOTE: For additional information regarding this propylene
glycol-based, boiler-type antifreeze that has been
“Generally Recognized As Safe” by the FDA, please
reference Appendix A, contact Aqua-Hot Heating
Systems Technical Support Department at 1-800-6854298, or visit the Web site at www.aqua-hot.com.
Maintenance Schedule
Figure 5
Monthly Maintenance:
Check the Aqua-Hot’s antifreeze and water heating solution to
ensure that it is at the proper level. This can be accomplished
by visually checking the coolant level in the Aqua-Hot’s Expansion Tank; reference Figure 5. Please note that the coolant
level should be checked only when the Aqua-Hot is at maximum operating temperature (i.e., immediately after the Propane
-Burner cycles OFF). When maximum operating temperature,
the antifreeze and water heating solution should be at the level
marked “HOT” on the Expansion Tank.
Replenishing the Antifreeze and Water Heating Solution:
Figure 6
If the antifreeze and water heating solution needs replenishing,
remove the Expansion Tank’s cap and fill the Expansion Tank
to the “HOT” level mark. When refilling, open the Air Release
Valve located on the Expansion Tank Connection to release air
pockets; reference Figure 6. Hold the valve open until all air is
released. If necessary, refill the Expansion Tank again. Be sure
the valve is closed when finished by hand-tightening. Reference Appendices A through C in order to determine the correct
— Page 10 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
WINTERIZATION
Not winterizing the Aqua-Hot when freezing temperatures
are present will result in serious damage to the Aqua-Hot’s
Domestic Water Heating System. Also, be sure to use an
FDA approved, “GRAS” rated antifreeze for winterization.
NOTE: The Aqua-Hot can continue to be used for interior
zone heating once the domestic water heating system
has been drained and winterized.
The Aqua-Hot’s Domestic Water Heating System must be
completely drained of domestic water any time the heater is
stored where freezing temperatures may be experienced.
Winterizing the Domestic Water Heating System:
Please follow these instructions when winterizing the AquaHot’s Domestic Water Heating System; reference Figure 8:
1.
Completely drain the fresh water storage tank.
2.
Disconnect the domestic water demand pump’s suction
line from the fresh water storage tank.
3.
Attach an adequate piece of hose onto the suction side of
the domestic water demand pump.
4.
Place the opposite end of the hose into an adequate supply
of FDA-approved “GRAS” RV Antifreeze.
5.
Open and 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.
6.
Remove the hose and reconnect the domestic water demand
pump’s suction line to the fresh water storage tank.
De-Winterizing the Domestic Water Heating System:
For de-winterization, completely fill the fresh water storage tank.
Open and close all interior and exterior water faucets, one at a
time, until only clear water is present/visible.
Reference Figure 8.
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 contacting the Recreational Vehicle Industry
Association at (703) 620-6003, visiting them online at
www.rvia.com, or writing to them at the following address:
Recreation Vehicle Industry Association
1896 Preston White Drive
P.O. Box 2999
Reston, VA 20195-0999
Arrows indicate directional flow of
domestic hot water
Domestic
Hot Water
Outlet
Aqua-Hot 375LP Heater
Figure 8
To Hot Water Faucets
Fresh
Water Storage
Tank
Domestic
Cold Water
Inlet
AT—Indicates options
for mounting an
Accumulator Tank.
To Cold Water
Faucets
Demand
Pump
— Page 11 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
TROUBLESHOOTING
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 installed.
2) Ensure that the main propane tank contains a sufficient
level of propane.
3) Ensure that the Aqua-Hot’s boiler tank has an adequate 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) Verify that the wires attached to the ground strip are firmly
attached; reference Figure 1-B
If the Aqua-Hot Heating System’s failure to operate is not resolved with the aforementioned checks, please contact the AquaHot Heating Systems Technical Support Department at 1-800685-4298 for additional assistance or visit the web site at
www.aqua-hot..com
APPENDIX A: ANTIFREEZE TYPES
The following information addresses the necessary usage of a
propylene glycol based “boiler” type antifreeze in the AquaHot. Propylene glycol is a safer alternative to the more toxic
ethylene glycol antifreeze; however, as mandated by IAPMO
(International Association of Plumbing and Mechanical Officials), only those propylene glycol based “boiler” type antifreezes deemed “Generally Recognized as Safe” (GRAS) by
the FDA should be utilized.
Because of the significant impact various types of antifreeze
can have on a Hydronic Heating System, including the level of
safety provided, it has been recognized that there is a need to
provide an explanation regarding two additional prominent
types of antifreeze/coolant available.
T
h
e
f
o
l
l
o
w
i
n
g
information should be utilized as an educational means of ensuring that the proper type of propylene glycol based
antifreeze is selected:RV & Marine Antifreeze:
These types of propylene glycol based antifreeze products are
formulated specifically for “winterizing” applications only. Although RV & Marine antifreeze is often “Generally Recognized
as Safe” by the FDA, it should never be used in the Aqua-Hot’s
Hydronic Heating System. This type of antifreeze is not formulated to transfer heat, which is essential to the Heating System’s
functionality and does not contain rust inhibitors. Please note,
however, that RV & Marine antifreeze can be utilized to winterize the Aqua-Hot’s Domestic Water Heating System.
APPENDIX B: ANTIFREEZE MIXTURE WATER QUALITY RECOMMENDATIONS
In order to ensure maximum performance and longevity of an
Aqua-Hot Heating System’s Boiler Tank and associated components, it has been determined that there is a need to use distilled, de-ionized, or soft water in combination with concentrated propylene glycol for the Aqua-Hot’s antifreeze and water
heating solution. Please note that this is only necessary when
mixing concentrated propylene glycol antifreeze with water;
suppliers of pre-mixed antifreeze are responsible for the use of
high-quality (distilled, de-ionized, or soft) water when preparing their antifreeze for sale.
Hard water possesses a high-level of calcium and magnesium
ions, which deplete the propylene glycol antifreeze’s corrosion
inhibitors. This, in turn, causes the antifreeze and water heating
solution to begin turning acidic, which can corrode the AquaHot’s Boiler Tank and associated components prematurely.
Therefore, concentrated propylene glycol should be diluted with
distilled, 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.
— Page 12 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
APPENDIX C: ANTIFREEZE TERMS AND MIXTURE RATIO
The following information addresses the process of selecting
an antifreeze and water mixture ratio that provides adequate
Freeze, Boiling, and Rust/Anti-Corrosive protection. A 50/50
mixture ratio is recommended, which will result in a freeze
point of approximately -28ºF and a boil point of
approximately 222ºF.
The following information should be utilized for the purpose of
clarifying some terms commonly associated with antifreeze.
Rust and Anti-Corrosive Inhibitors:
Another major function of antifreeze is to provide protection to
the internal metal components of the Aqua-Hot Hydronic 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 has three basic functions: freeze protection, boil-over
protection, and anti-corrosion and rust protection.
Freeze Point and Burst Point:
Antifreeze lowers the freezing point of any liquid, to which it
has been added, by preventing the formation of ice crystals;
however, as the ambient temperature continues to decline, the
water in the solution will attempt to attain a solid state. The
point in which the water begins to solidify is termed the
“Freeze Point.” Although the water in the solution has begun
to freeze, producing a “slushy” consistency, the antifreeze in
the solution will continue to combat the normal expansion of
the solution as it freezes. The point in which the solution can
begin to expand, due to colder temperatures, is called the
“Burst Point.” Once the solution reaches the burst point, the
potential is present for ruptured pipes to exist. The burst point
of the antifreeze and water heating solution is dependent upon
the brand of propylene glycol employed.
Boiling Point:
The Aqua-Hot utilizes the antifreeze and water heating solution
as a transportation means for the heat produced from the internal processes. The antifreeze absorbs the heat created until its
boiling point is reached; it is at this point that the liquid turns to
a gas and is expelled to prevent the Heating System from overheating. Each time the boiling point is reached, a loss of efficiency occurs because the heat produced is expelled rather than
utilized for the function of the heating system. Therefore, a
higher boiling point is desired in order to combat the loss of
efficiency, which allows the antifreeze to transport the heat
created from the internal process throughout the motorhome
where it can be utilized productively rather than dissipating due
to its change from a liquid to a gas.
Antifreeze is also primarily responsible for heat transfer; however, antifreeze itself does not possess acceptable heat transfer
characteristics. Therefore, as water is an excellent heat conductor, it is added to the mixture. A 50/50 solution of propylene
glycol antifreeze and water is recommended to
provide the best performance combination of the
aforementioned functions. If excess propylene glycol exists
within an antifreeze and water heating solution, the water’s heat
absorption properties are compromised, which could ultimately
inhibit the Aqua-Hot from providing adequate domestic hot water
and interior heating.
Additionally, if the antifreeze and water heating solution contains
less than 50 percent antifreeze, the freezing point is actually
raised, resulting in less freeze protection. Please reference the
attached graphical representation regarding the percentage of
antifreeze to water and how it directly affects the solution’s freezing point.
— Page 13 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
APPENDIX C: ANTIFREEZE TERMS AND MIXTURE RATIO
— Page 14 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
2-YEAR LIMITED WARRANTY
AQUA-HOT® HYDRONIC HEATING SYSTEM
AHE-375-LP
Aqua-Hot Heating Systems Inc. warrants the Aqua-Hot Heater to be free from defects in material and
workmanship under normal use and service for a period of two years on both parts and labor commencing upon the original date of registration of the vehicle. Replacement parts are warranted for the remainder of the Heater’s standard warranty coverage 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 Heater are specifically excluded from
warranty coverage.
For additional information or to obtain a warranty repair authorization, please contact the Aqua-Hot
Heating Systems Warranty Administrator at 1-800-685-4298 (8:00 AM to 5:00 PM Mountain Standard
Time) or visit www.aqua-hot.com.
— Page 15 —
© 2009 Aqua-Hot® 375-LP Hydronic Heating System Owner’s Manual
15549 East Highway 52 | Fort Lupton, CO 80621
800-685-4298 | Fax: 303-857-9000 | www.aqua-hot.com
LTE-375-010
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