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Purging the Heating Loop
First Operation
Aqua-Hot First Operation
Activation Instructions (Electric Element):
1. Make sure power supply to the Aqua-Hot is on.
2. Confirm that the ethylene glycol and distilled water heating
solution is adequately filled.
3. Confirm the system and heating loop has been properly
purged of any air.
4. Make sure to flush the domestic water system thoroughly
with clean water prior to use.
5. Tap the electric element to "ON" on the Aqua-Hot 3.5in LCD
screen to supply the 120V AC electric element with power.
Figure 103
6. Allow approximately 20 minutes for the electric element
to heat the tank. Turn on a hot water faucet, and allow to
run until hot water flows. Once there is hot water, close the
faucet. This will verify that the electric element is operating
as it should.
Once these checks have been confirmed, the electric
heating element is now ready for normal operation and
use.
Continue to the next procedure to activate the external gas
burner.
p. 50
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
The first operation of the burner with the Aqua-Hot may not light
up perfectly. It may take 5-6 starts for the burner to ignite for
the first start-up after installation, because the fuel pump needs
to fill the fuel lines leading to the burner for ignition.
NOTE: Make sure to perform the fuel line purge procedure
on Page 45 prior to starting this initial start up of the burner.
Activation Instructions (Gas Burner)
1. Make sure there are no blockages or debris to the exhaust
outlet or combustion air inlet.
2. Make sure the plumbing lines and fuel lines are properly
purged and free of air.
3. Make sure there is adequate fuel in the vehicle fuel tank
(at the least ¼ tank).
4. Turn on the burner on the heater control screen.
Figure 104
5. Once the burner turns on, the circulation pump and
combustion air fan should run (can be determined by
listening).
6. The burner should start up after approximately 120
seconds. This can be determined by the hot exhaust exiting
from the exhaust tube.
7.
Allow the burner to run a full cycle. Turn on the heat or
hot water inside the RV to confirm the burner is properly
operating.
Once these checks have been confirmed, the gas burner
is now ready for normal operation and use.
NOTE: It is recommended to run the burner for at least 20
minutes every month to ensure optimum heater condition.
NOTE: Both the electric heating element and the external
gas burner are thermostatically controlled. The element
and/or burner will automatically maintain the temperature
of the boiler tank's antifreeze and water heating solution.
Winterizing the Aqua-Hot
The Aqua-Hot's domestic water heating system must be
completely drained of domestic water at any time the heater is
stored where freezing temperatures may be experienced.
Please follow these instructions when winterizing the Aqua-
Hot domestic water heating system. Reference Figure 105 for a
system overview.
NOTE: The Aqua-Hot can continue to be used for interior heat
once the domestic hot water system has been winterized.
1. Completely drain the fresh water storage tank.
2. Disconnect the domestic water demand pump 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 non-toxic RV winterization antifreeze (FDA certified as
"GRAS" Generally Recognized As Safe must be used) and
allow the fluid to pump through.
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 cold and hot water faucets.
6. Remove the hose and reconnect the domestic water
demand pump's suction line to the fresh water storage
tank.
Cold Water Faucets
Demand Pump
Fresh Water
Storage Tank
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
Purging the Heating Loop
Winterizing the Aqua-Hot
Not winterizing the Aqua-Hot when freezing temperatures
are present will result in serious damage to the Aqua-Hot
domestic water heating system. Ensure that only non-
toxic RV antifreeze (FDA approved "GRAS" antifreeze)
rated for winterization is used when winterizing this unit.
The warranty does not cover freeze damage.
Disinfecting the Domestic Water System
The Aqua-Hot Heating components are not compatible to
prolonged exposure to sodium hypochlorite (bleach or liquid
bleach). Using products containing bleach, including water
refreshers, may cause corrosion of the domestic water lines,
resulting in a catastrophic failure of the Aqua-Hot system by
creating leaks that cannot be repaired. This damage is not
covered by the Aqua-Hot warranty.
If disinfecting the hot water system, be sure to follow NFPA
1192 Standard of Recreational Vehicles "Instructions for
Disinfection of Potable Water Systems" or any other applicable
local standards for Potable Water Systems.
NOTE: Extended exposure to household bleach will corrode
the components of the Aqua-Hot will potentially dramatically
shorten the operational lifetime of the Aqua-Hot. Under no
circumstances is the Aqua-Hot to be exposed to household
bleach for extended periods of time.
To Hot Water Faucets
Domestic Hot
Water Outlet
Figure 105
Tempered
Domestic Hot Water
p. 51
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