Installing The Expansion Tank - Aqua-Hot 450-DE Installation Manual

Installing the Expansion Tank:

Select a mounting location that allows for easy access
and clear visibility whenever the particular storage bay
door is open.
NOTE: The top of the expansion tank should always be
mounted at least 4 inches higher than the highest point
on the Aqua-Hot. Reference Figure 12.
1. Mount the expansion tank as illustrated in Figure 12.
2. Connect and clamp the overflow tubing from the
expansion tank to the Aqua-Hot's expansion tank con-
nection. Reference Figure 12.
Section 1: Aqua-Hot Installation
Expansion Tank
Figure 12
Air-Release Valve
© 2008 Aqua-Hot ® 450-DE/DM Hydronic Heating System Installation Manual
NOTE: Avoid any dips and bends in the overflow tubing from
the Aqua-Hot to the expansion tank as air can become
trapped in these dips and bends, preventing the expan-
sion of the heating solution from properly depositing
in the expansion tank.
3. Drill a hole in the bay floor and connect (secure with a
clamp) 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.
Mount top of expansion
higher than the Aqua-Hot.
Fill to "Cold" level
mark with "GRAS"
approved 50/50
antifreeze/water
Overflow Tubing
Expansion Tank
Connection
Overflow tubing from
expansion tank to hole
drilled in motorhome floor.
tank at least 4 inches
mixture.
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