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Turn the Electric Hot Water switch ON. This activates the 120 Volt-AC electric heating
element and the indicator light located on the switch. Allow 1-2 hours for the Aqua-Hot
System to reach operating temperature.
Zone Thermostat Operation
Interior Room Thermostat: Adjust each interior room thermostat to the desired temper-
ature. Whenever an interior room thermostat "calls for heat," the Aqua-Hot's circulation
pump and interior heat exchanger fans will be activated. Aqua-Hot must be at operating
temperature in order for the zones to function.
Using the Domestic Hot Water System
When the Aqua-Hot is at operating temperature, the domestic water is automatically heated
as it is being used. The Aqua-Hot system is tankless and does not store any hot water, con-
tinuous hot water will be present from any faucet. The Diesel-Burner switch must be ON
in order to obtain a continuous supply of hot water; activate the electric element switch for
maximum hot water capacity.
™ NOTE: The Aqua-Hot's "Domestic Water Priority System" disables the inte-
rior zone heating fans and the zone circulation pumps whenever domestic hot
water is being used on a continuous basis. Once the demand for continuous
hot water ceases, the Aqua-Hot will enable the fans and the pumps to operate
and provide heat to the heating system.
™ NOTE: Both the Diesel-Burner and the electric heating element are thermo-
statically controlled. Either, or both heating sources will automatically main-
tain the temperature of the antifreeze and water heating solution between
approximately 160°F and 190°F (±5).
To heat the motor home/domestic hot water, choose the desired heat source(s) and leave the
switch(s) (burner and/or electric hot water) ON.
Electric Hot Water: When connected to shore power or when using the generator, the
Aqua-Hot electric heating element has the ability to function in order to provide heat for the
boiler tank.
The electric heating element is a secondary heat source for heating both the interior and the
domestic hot water during low heating demand situations (moderate ambient temperatures
exist and/or when there is a low demand for domestic hot water).
Maintenance (Aqua-Hot)
Refer to the Aqua-Hot owner's manual for detailed procedures, system requirements
and parts information prior to performing any maintenance to the Aqua-Hot system.
When the Aqua-Hot is at maximum operating temperature, the coolant will be
very HOT! If Aqua-Hot's heating system is accessed, scalding by hot vapor
or coolant could result! Before cleaning or servicing, disconnect all power
supplies!
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 ex-
pansion tank. The coolant level should be checked only when the Aqua-Hot is at maximum
operating temperature (i.e., immediately after the Diesel-Burner cycles OFF). When the
Aqua-Hot is at maximum operating temperature, the antifreeze and water heating solution
should be at the level marked "HOT" on the expansion tank.
Section 8: Plumbing System
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