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House Power Sense
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 RV-C 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.
Wiring for House Power Sense
In order for the Aqua-Hot to function correctly and to maintain the fail-safe nature of the House Power Sense, supply 12V DC
power to either the J8-9 pin OR to the J3-1 pin. Do NOT supply power to both of these pins.
Wiring for Multi-Plex Systems
When wiring for Multi-Plex Systems, route a power wire from a power connection on the RV-C system to the Aqua-Hot's J3-1 pin
(that is, plug J3, pin 1). The House Power Sense will not function correctly if 12V DC power is not supplied from a device on the
RV-C network.
Routing the wire from the RV-C network (or from an accessory on the RV-C network) ensures that if the RV-C network goes off-
line (but the vehicle remains otherwise powered), the Aqua-Hot will not continue to operate unabated.
There are two ways to wire the House Power Sense for use with a Multi-Plex network; typical wiring case and a special wiring
case.
Typical
The typical use case in wiring the House Power
Sense requires a constant 12V DC signal on
plug J3-1 for the House Power Sense. Plug J3
is the 4-position RV-C plug. This is the easiest
way to implement House Power Sense on
vehicles with on-board Multi-Plex systems.
J3 Wire Insertion View Shown
Figure 49
p. 24
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
Special
If for some reason pin J3-1 cannot be supplied
with power, supply 12V DC power to the J8-9
pin.
J8 Wire Insertion View Shown
7
8
9
4
5
6
1
2
3
Figure 50
Connecting the 125GN to 12V DC Power
DO NOT connect 12V DC power to the Aqua-Hot if
the vehicle requires welding. Electrical welding
will cause serious, irreversible damage to the
Aqua-Hot.
The section will outline the requirements, steps, and
information necessary to connect the Aqua-Hot to the vehicle's
12V DC power system. Follow all guidelines and pay attention to
all notes contained herein. Failure to adhere to these guidelines
can inhibit unit performance, and may cause damage to the
Aqua-Hot and/or the RV.
•
Installation must be performed by a qualified, professional
according to current national regulations. Reference
A119.2/NFPA 501C Standard on Recreational Vehicles
1993 Edition for relevant national regulatory information.
•
Select the correct wire gauge for installation referencing
ANSI/RVIA-LV.
•
Protect the Aqua-Hot from over-current and shorting by
incorporating a 20A breaker (minimum) to the Aqua-Hot's
RV-side power connection.
•
The 12-volt supply to the heater must be routed directly
from the battery.
•
All power circuits must be protected with fuses or automatic
circuit breakers.
•
The 14AWG RV power and ground wires go directly into the
butt splice shown below.
•
Cover splice crimp with heat shrink once complete.
Butt Splice - Power
D11
Butt Splice - Ground
D12
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
Providing DC Power
Positive/Power
+
-
In-Line
Fuse
Main Battery
Vehicle Battery
Disconnect
Negative/Ground
Figure 51
NOTE: The image above is simply a reference. A professional,
licensed installer needs to determine the necessary
components and configuration according to local codes and
standards.
RV Power
Figure 52
RV Ground
Figure 53
p. 25
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