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Fluid Expansion Bottle
Installation of the Expansion Bottle
The fluid expansion bottle is integral to the operation of the
Aqua-Hot. It provides an area for hot, expanded fluid to empty
into, and also protects the Aqua-Hot from low-fluid, which could
lead to catastrophic damage of the Aqua-Hot.
NOTE: Before securing the expansion bottle to the side of
the Aqua-Hot or its mounting location, the boiler tank must
be filled with the heating solution. The expansion bottle must
be higher than the unit for this to happen to avoid air locks.
See "Filling the Aqua-Hot" on page 39 for more information.
Follow the directions in this section to correctly install the fluid
expansion bottle.
Installation Procedure:
1. Place the expansion bottle in position on the side of the
Aqua-Hot or other mounting location in the RV.
2. Secure the expansion bottle using either self-tapping
screws driven into the dimples in the area of the Aqua-
Hot shown in below, or mounting hardware specific to the
Mount bottle
here
Figure 15
Expansion hose. Must vent to
the exterior of the vehicle
Fluid Level Sensor
Hole in the RV bay floor for overflow hose
NOTE: Avoid any bends or dips in the overflow tubing from the
Aqua-Hot. Air can become trapped in these bends and will prevent
excess antifreeze and water heating solution from depositing
properly in the expansion bottle.
p. 12
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
mounting location in the RV. Please only use the length
of hose provided, or less, if the bottle is not mounted to
the side of the Aqua-Hot. Additionally, there should be a
gradual rise from the Aqua-Hot to the expansion bottle if it
is not mounted to the Aqua-Hot.
3. Drill a hole in the floor of the RV to allow the overflow tube
to vent to the exterior of the vehicle (Figure 16).
4. Cut the hoses to length if necessary.
5. Place a hose which runs from the lower fitting of the
expansion bottle to the expansion bottle connection shown
in Figure 17. Secure this hose in place with 2 constant
tension hose clamps.
6. Place the overflow hose so that it connects to the upper
fitting of the expansion bottle, and exits through the hole
drilled through the RV floor in step 3 (Figure 16). Secure
this hose to the upper fitting with a constant tension hose
clamp.
7.
Locate the wires of the expansion bottle and connect them
to wires J43 and J44 on the wiring harness.
Fill Cap
Upper Fitting
Hot Fluid Line
Cold Fluid Line
Fluid Level Sensor
Lower Fitting
Expansion Bottle
Connection
Figure 16
Fluid Fill Port
Install the external gas burner in a location separate from the
living spaces that protects the unit, and also allows service
access to the burner.
•
Reference the illustrations below for mounting information.
•
The burner is best placed in a location where it can be
easily accessed for service and maintenance.
•
The burner must not be mounted higher than the expansion
bottle.
•
The bracket must be secured to the vehicle with at least 4
M6 screws.
•
Fasten the burner bracket firmly, the 4 corners should be
lined with rubber shock absorbers. The burner must be
fastened on the bracket with (4) M6 bolts (see Figure 20).
Mounting Bracket Dimensions
Ø 0.52in (x4)
10.81"
4.85"
Figure 17
Before drilling holes in the vehicle, consult the
manufacturer for recommendations and limitations.
Do NOT weld to the vehicle frame.
Figure 18
Mounting the Burner to the Vehicle
•
The burner can be oriented to suit different orientations/
positions, however it should not exceed an angle greater
than 90°. The recommended orientation is horizontal with
the exhaust pipe vented downwards.
•
If mounting to the frame rail, use (4) M6 bolts. Drill (4) M6
holes where the burner will be mounted, and fasten the
bracket to the vehicle with (4) M6 bolts.
•
Secure the burner to the bracket using appropriate
mounting hardware, M6*95 bolts torqued to 6 lb-ft.
Mounting Bracket
(1) M6-95 Bolt
5.28"
12.56"
Figure 19
©Aqua-Hot®
125-GN1 Installation Manual REV 220427
Fluid Expansion Bottle
Mounting the Burner
(4) M6 Bolts
Figure 20
Figure 21
Figure 22
p. 13
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