Controller
Controller
©Aqua-Hot®
125-DN1 Service Manual
REV 220421
©Aqua-Hot®
125-DN1 Service Manual
REV 220421
p. 17
p. 16
Electric (C):
Activating the Electric heating sub-system will energize the
relay which controls the AC electric element.
After tapping this button on the screen, there should be an
audible click from within the Aqua-Hot cabinet. If there is
no such click, verify the functionality of the AC electric relay.
This test CANNOT directly energize the AC electric element.
It is used only to verify the functionality of the command
and control system.
Burner (D):
This element will energize the Diesel Burner signal wire,
which will then trigger the heat source to activate.
Three-Way Valve (E):
The final element on this screen is not directly related to
the heating subsystems of the Aqua-Hot.
The three-way valve (sometimes known as the summer/
winter valve) controls the flow of the antifreeze and water
heating solution within the Aqua-Hot to deliver either hot
water, or interior heat as requested.
Tapping on this element will change the valve’s orientation.
When this element displays “INT. HEAT” this valve is
oriented to provide interior heat by circulating heating
solution throughout the interior heating zone. When this
element displays “HOT WATER” the valve is oriented such
that heating solution is routed so that hot water can be
provided.
Testing Functionality:
One of the new features of this control system is the ability to
independently activate specific elements within the Aqua-Hot
for testing purposes.
This will allow a technician to activate specific elements within
the Aqua-Hot as needed without jumping wires or utilizing
external power supplies in most troubleshooting cases. Any
elements activated via the testing screen will remain active for
a maximum of five minutes.
Pumps (A):
Both the zone circulation pump and
the boost pump (if applicable) can be
activated by tapping the corresponding
pump on the test screen.
Fans (B):
All three zone fans can be activated
as needed to test communication
between the zone fans and the
controller. Please note that this will
only work if the zones have been
directly wired to the Aqua-Hot as
described in the installation manual.
Heating sub-systems can be activated independent of their
control circuits and other control sensors as a means of testing
functionality. These systems will activate for a maximum of five
minutes before shutting down.
Activating heating sub-systems in this manner will disregard
all sensor inputs while attempting to activate these heating
systems. As such, if the unit is near operating temperature,
activating these systems may trigger an overheat condition.
Heating sub-system testing is NOT a substitute for
normal operation, and attempting to use it as such may
result in catastrophic damage to the Aqua-Hot.
Figure 21
Figure 22
Figure 23
D
C
E
DO NOT
attempt to activate these sub-systems
while the unit is near operating temperature
B
A
Controller Replacement Procedure:
1. If possible, tap the three lines icon at the bottom right
corner of the LCD screen.
• Tap the AQUA-HOT DIAGNOSTICS icon. Record all the
information in the “Aqua-Hot Information Section”.
• Tap and hold (for 3 seconds) within the information
section.
• Tap OPTIONS, CLIMATE ZONES, and take a picture
of this screen.
2. Disconnect all power to the Aqua-Hot.
3. Remove the four Philips screws attaching the top cover of
the Aqua-Hot, and remove the top cover to gain access to
the interior components.
Tap and hold
(3 seconds)
anywhere in this
section
Take a picture
of this screen
Figure 26
4.
Using a ⅜” (10mm) socket, remove the hex nut from the
top of the mounting plate (SAVE THE NUT TO USE AGAIN)
5. Gently lift up on the controller bracket and remove the
plugs as they become accessible. The high-limit
thermostat may need to be disconnected to provide
clearance (a pair of needle-hose pliers is recommended
to remove the connections).
6. Disconnect the DC harness from the controller.
• Suggested disconnect order (see Figure 29 below):
• 3-Pin Molex power connector
• 12-Pin Molex (top right of the controller)
• 9-Pin Molex (top left of the controller)
• RVC (middle right of the controller)
• 15-Pin Molex (middle left of the controller)
• 8-Pin Molex (bottom of the controller)
Figure 27
Figure 28
High-Limit
Thermostat
NOTE:
DO
NOT
DISCONNECT THE DC HARNESS FROM ANY
OTHER ELECTRICAL CONNECTION IN THE UNIT.
9-Pin
Molex
12-Pin
Molex
RVC
8-Pin
Molex
15-Pin
Molex
Figure 29
Figure 24
Figure 25
Содержание Aqua-Hot 100 Series
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