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© Aqua-Hot® 400-D Use & Care Guide 8
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Aqua-Hot Heating System Features
Controls Overview
Do not operate the diesel-burner and/or electric 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.
Switches:
The Aqua-Hot heating system is controlled by two switches,
the burner switch and the electric element switch. When
one or both of these switches are in the ON position, it will
supply the necessary heat to the boiler tank. Keep in mind
that the Aqua-Hot must be at operating temperature for the
heating zones and hot water to function properly. Please
contact the specific motor home dealer for exact location of
switch operations.
Thermostats:
The interior room thermostat can be set at the desired tem-
perature; therefore, whenever the interior of the room “calls
for heat”, the Aqua-Hot’s circulation pump and interior heat
exchanger fans will be activated. The fresh water thermostat
controls the bay heating area and should NOT be set below
40°F, to prevent freezing of the domestic water storage sys-
tem. Please contact the specific motor home dealer for exact
location of thermostat controls.
Interior Heating Operation
Heating Operation
Overview:
The heating features are powered by a 12 Volt-DC diesel-
burner and a 120 Volt-AC electric heating element. These
two heating elements maintain the temperature of the Aqua
-Hot’s antifreeze and water heating solution to provide hot
water and heat to the motorhome.
Diesel–The diesel-burner is the Aqua-Hot’s primary and
most powerful heat source and provides all of the heat-
ing and hot water needs when cold temperatures exist
and/or when there is a high demand for hot water. It
can be activated by turning the burner switch in the ON
position. Reference Figure 1 on following page.
Electric–The electric element is the Aqua-Hot’s second-
ary heat source and can be used when plugged into
shore power. The electric element provides heat when
moderate temperatures exist (50°F or higher) and/or
when there is a low demand for hot water. It can be
activated by turning the electric switch in the ON posi-
tion. Reference Figure 1 on following page.
Controlling Heat Levels:
The interior room thermostat can be adjusted at the de-
sired temperature and will automatically be activated to
maintain the temperature of the interior. Keep in mind that
the diesel and/or electric element switch must be in the ON
position for the heat to operate.
Control/Balancing Heating Zones:
Set the interior room thermostat for each independent
heating zone at the desired temperature. This feature al-
lows you to customize various temperatures on each heat-
ing zone throughout your motor home.
