Fluid Expansion Bottle
Support and Clearance
©Aqua-Hot®
400D Installation Manual
Rev 220504
©Aqua-Hot®
400D Installation Manual
Rev 220504
p. 9
p. 8
Installation of the Expansion Tank
Introduction:
The fluid expansion tank 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.
Follow the directions in this section to correctly install the
fluid expansion tank.
Installation Procedure:
1. Mount the expansion tank as illustrated in Figure 13. The
overflow tube should have an incline.
2.
Connect and clamp the overflow tube from the expansion
tank to the Aqua-Hot’s expansion tank connection as
shown in Figure 13.
3.
Drill a hole in the bay floor and connect a long enough piece
of overflow tubing so that it can be connected to the top
of the expansion tank and extend through the bay floor.
Secure tubing with clamps.
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.
Hot Fluid Line
Cold Fluid Line
Fill Cap
Lower Fitting
Upper Fitting
Figure 12
Figure 13
Overflow Tube
Expansion Tank
Pressure Relief Valve
Expansion hose. Must
vent to the exterior of
the vehicle
Fluid Expansion Tank
All measurements
are in inches
NOTE:
The top of the expansion tank must be mounted
higher than the highest point on the Aqua-Hot.
The Aqua-Hot tank and heating loop operate at 0 PSI (Zero
pressure system). Air pressure applied to the tank MUST
NOT exceed 20 PSI. Excess pressure will result in internal
damage.
FRONT VIEW
SIDE VIEW
BOTTOM VIEW
REAR VIEW
Hole in the coach bay
floor for overflow hose
Tension Clamp
Tension Clamp
TOP VIEW
