Introduction
Introduction
©Aqua-Hot®
125DN Installation Manual
REV 220419
©Aqua-Hot®
125DN Installation Manual
REV 220419
p. 5
p. 4
Read and understand all instructions
before
installing the
Aqua-Hot unit and the external diesel burner. Aqua-Hot Heating
Systems is not liable for damage resulting from failing to
follow instructions contained in this, and any other Aqua-Hot
documentation relevant to this unit.
• Read this manual
before
installing or using the Aqua-Hot
System to reduce the risk of injury to persons or damage to
the equipment.
•
The product identity label contains specifications of the
unit, to what standards it has been tested, and important
safety notices.
• Disconnect electric wiring to the Aqua-Hot System before
welding or plasma cutting the RV to avoid damage to
equipment.
• The Aqua-Hot tank and heating loop operate at 0.0 PSI
(zero pressure system). Air pressure to the tank must not
exceed 18 PSI. Exceeding this rating will cause internal
damage to the Aqua-Hot.
•
Use caution when working on or near any propane/diesel
fuel system.
• DO NOT connect the 12-volt DC power to the Aqua-Hot if the
vehicle requires welding.
• At maximum operating temperature, the coolant will be
very hot and scalding. Hot vapor or coolant may cause in
serious burns or injury. Be aware of hot surfaces.
• Use special caution when children are present. Children
must not be allowed to play with the heater or perform
cleaning and maintenance.
• Installation and repairs may only be carried out by an
authorized, factory-trained A
qua-Hot technician. The
heating system must be installed in accordance with local
codes, or in accordance with the Standard for Recreational
Vehicles, (RVIA) ANSI A 119.2/NFPA 501C, NFPA 1192.
• At maximum operating temperature, the hot air outlet will
be very hot that may result in serious burns or injury. Be
aware of hot surfaces.
• The diesel burner must be installed in a location that is
closed off from living quarters and accessible only from the
exterior of the vehicle.
• The burner produces very hot temperatures that can ignite
surrounding flammable materials. The burner should be
turned off when loading or unloading flammable materials.
If the information in this manual is not followed
exactly, a fire or explosion may result, causing
property damage, personal injury, or death.
Safety Features
Low-Voltage Shutdown
The Aqua-Hot Controller is designed to operate between
11V DC and 16V DC. If the Controller detects that it is
receiving voltage below 11.8V DC, a System Voltage fault
will trigger a display on the LCD screen. If the Controller
system drops below 11.2V DC for 30 seconds, it will
discontinue operation of the Aqua-Hot heating system.
Over-Current
An Over-Current fault condition occurs when too much
current is drawn by a component, usually a fan or pump.
When this fault is triggered, the output channel is shut off
until the system has been reset or power-cycled.
Over-Temperature
An over-temperature fault will occur if your Aqua-Hot heating
system has reached 218°F. The Controller will deactivate
the heater and display an over-temperature fault on the
LCD display screen.
Low-Level Cutoff
If the system senses low fluid levels, the heating system will
shut down all fans, heat sources, and pumps until the unit
is adequately refilled.
House Power Sense
The Aqua-Hot Controller contains within it a fail-safe
functionality known as House Power Sense. This
functionality serves as a live signal to the Aqua-Hot allowing
it to continue operating. If power is lost to the on-board RVC
network or other on-board control systems, the controller
is signaled to shut down operation until a 12V DC power
signal is returned to the unit.
As with any appliance, allow the Aqua-Hot to
completely shut down BEFORE disengaging
the RV 12V power disconnect.
Safe Installation of the Diesel Burner
Be sure to become familiar with the installation process and the
documentation before installing in the vehicle.
• Make sure to protect the burner during installation. Do not
drop or stand on the burner.
• Avoid abruptly shutting down the burner prior to the purge
cycle. The burner fan will continue to run for several minutes
after being shut off to cool down and purge unused fuel.
• Only turn off the burner at the switch in the interior of the
vehicle.
• Do not disconnect the 12V DC power supply prior to the
purge cycle.
• Only shut down the burner via the battery disconnect in the
case of an emergency or danger.
• Do not allow the wiring or wiring harness to come into
contact with sharp edges on metal panels. The wires can
become damaged and short circuit and potentially cause a
fire. Use caution when installing the wiring.
• Protect any vehicle parts near the burner from excessive
heat damage, or from contamination from fuel.
• Make sure the internal combustion burner will not pose
a fire hazard even in an overheat situation. Take care in
placing the burner with enough space from vehicle parts
and that the burner will have ample ventilation.
• The serial label must be visible and legible after the burner
has been installed.
• All precautions must be taken to minimize the risk of
personal injury or damage to the burner or vehicle.
• It must be obvious to the user when the burner is switched
on or off.
• The burner may not be mounted in a position above the
125DN expansion tank.
Fuel Supply
• Do not use the heater in enclosed spaces such as a garage.
The fumes produced from the exhaust can be toxic. Do not
use the burner while refueling or while other appliances are
being serviced or refueled.
•
The fuel filler neck should be installed in a compartment
that is closed off from living quarters and must have a
tightly fitting cap to prevent any fuel leaks.
•
A visible, legible sign must be attached to the filler neck that
the burner be turned off before refueling. A similar warning
is included in the manufacturer’s operating manual.
Exhaust System
• Do not operate the burner in an enclosed space or a space
that does not have exhaust ventilation. Fumes from the
exhaust may be toxic.
• The exhaust system must be positioned so that the fumes
will not get into the interior of the vehicle through ventilation
openings or windows.
Combustion Air Inlet
• The burner combustion chamber air must not be taken from
the interior of the vehicle, only fresh air from the exterior.
• An intake line is required for the combustion air.
• The air inlet must be positioned in an unobstructed manner.
NOTE:
Contact your Authorized Service Center or Aqua-
Hot Heating Systems if you have any questions
before
starting installation. Information can be found online
at www.aquahot.com.
