Controller
©Aqua-Hot®
250-D03 Diesel Series Service Manual
REV 220302
p. 13
Burner Status:
The Burner Status element on this page
indicates the status of the diesel burner.
LTCO Status:
The LTCO status indicates the sensor reading
from the Low-Temperature Cutoff Thermostat,
which is the device that governs whether to
provide heat or hot water.
LLCO Status:
LLCO status relays the current sensor reading
of the Low-Level Cutoff sensor within the
overflow bottle.
The LLCO is implemented to measure the fluid
level within the overflow bottle to ensure that
it does not drop below a safe threshold.
Tank Temperature:
The Tank Temperature will display the current
temperature of the antifreeze and water
heating solution within the Aqua-Hot.
The ETS Thermistor (short for engine
temperature sensor) provides this
temperature information to the controller,
which then governs when the diesel burner
and/or electric element shut off.
Outputs to Aqua-Hot (D):
The Outputs to Aqua-Hot section describes the current status
of the controllable elements within the Aqua-Hot which are the
Burner Status, Fluid Circulation Pump, and the Electric Element.
This indicates only that the controller is attempting to operate
these elements, not their current functional status.
Inputs from Aqua-Hot (E):
The Inputs to Aqua-Hot will contain the current readings from
sensors within the Aqua-Hot. Four elements will be shown on
this page; Burner Status, LTCO Status, LLCO Status, and Tank
Temperature.
Figure 9
Figure 8
D
E
RV-Side
Connections &
Components
Inputs from RV
Outputs to RV
Aqua-Hot
Connections &
Components
Inputs from Aqua-Hot
Outputs to Aqua-Hot
Aqua-Hot 5in
LCD Screen
Aqua-Hot
Controller
