91
Discovery, Discovery LXE, Pace Arrow, and Pace Arrow
Aqua Hot Operation – Diesel
Turn on interior house
power.
Press the Aqua-Hot Burner
switch.
Press the Systems button
until Heat is displayed.
Press the thermostat Zone
button repeatedly to select
desired zone. Refer to Zone
Chart.
Press the thermostat Mode
button repeatedly until Gas
is displayed for each zone
of operation.
Set desired temperature on
thermostat by pressing the
Up or Down buttons.
Repeat process for each
desired zone.
NOTE:
A separate thermostat is
used to set temperature of
Zone 4. See Bay Thermostat
for instructions.
NOTE:
Do not set the thermostat
to conflicting modes of
operation such as setting
one zone to Cool with
another zone is set to Heat.
Operating mode in any
zone must be set to heat
(or off) for the Aqua-Hot
and thermostat to function
properly.
Electric Heat Element:
The Aqua-Hot has a 1650 watt
heating element. If shore service
is limited to 30 Amps or less, it is
recommended to operate the Aqua-
Hot using the diesel function to
avoid electrical overload of shore
power. While the generator can
power the electric element, it is not
fuel efcient to do so.
Preheat time is longer and
recovery rate is slower when using
the electric element. The Aqua-Hot
electric switch is located on the
monitor panel.
Aqua Hot Operation – Electric
Hook to shore power.
Turn on interior house
power.
Press the Aqua-Hot electric
switch. The switch will
illuminate when on.
Slide thermostat switch to
Heat.
Press the Zone button
repeatedly to select desired
zone. Refer to Zone Chart.
Press the Mode button
repeatedly until Gas is
displayed for each zone of
operation.
Set desired temperature on
thermostat by pressing the
Up or Down buttons.
Repeat process for each
desired zone.
Interior Heat Exchangers:
Heat exchangers are located
throughout the motorhome
and in the water service center.
The heat exchangers are small
radiators equipped with 12 Volt
DC blower motors. Depending on
the zone selected for operation and
temperature set point, the blower
for an exchanger will operate
until the temperature set point is
reached or until the mode for an
operating zone is turned off.
Engine Preheat:
The Aqua-Hot system has an
engine preheat feature to aid
engine starting in cold weather.
Inside the Aqua-Hot is an engine
coolant loop and pump that will
circulate heated coolant through
the engine.
To Use Engine Preheat:
Turn on the Aqua-Hot Diesel
switch at the galley and allow
the system to warm up.
Turn on the Aqua-Hot
Engine Preheat switch at the
dash to activate the engine
pump inside the Aqua-Hot.
The time required to preheat
the engine varies with
ambient temperature. Allow
two or three hours of engine
pre-heat time.
Engine Heat Exchange System:
When traveling, the water
pump on the engine circulates
heated engine coolant through
the Aqua-Hot. Heat transfers to
the Aqua-Hot coolant through
convection providing hot water.
Use the thermostat to operate heat
exchangers for interior heating
while traveling.
To Heat the Interior While
Traveling:
Turn on the interior house
power.
Turn on the diesel burner.
Set thermostat switch set to
Heat.
Repeatedly press the mode
button until Gas appears.
Select the desired Zone.
Use the up or down buttons
to set temperature.
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