Airxcel Aqua-Hot 600 Series, Installation Manual

Page: 10 / 63

Fluid Expansion Bottle
©Aqua-Hot® 600D Installation Manual p. 9
Installation of the Expansion Tank
Introduction:
The fl uid expansion tank is integral to the operation of the
Aqua-Hot. It provides an area for hot, expanded fl uid to empty
into, and also protects the Aqua-Hot from low-fl uid, which could
lead to catastrophic damage of the Aqua-Hot.
Follow the directions in this section to correctly install the
fl uid expansion tank.
Installation Procedure:
1. Mount the expansion tank as illustrated in Figure 15. The
overfl ow tube should have an incline.
2. Connect and clamp the overfl ow tube from the expansion
tank to the Aqua-Hot’s expansion tank connection as
shown in Figure 15.
3. Drill a hole in the bay fl oor and connect a long enough piece
of overfl ow tubing so that it can be connected to the top
of the expansion tank and extend through the bay fl oor.
Secure tubing with clamps.
NOTE: Avoid any bends or dips in the overfl ow 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 tank.
Hot Fluid Line
Cold Fluid Line
Fill Cap
Lower Fitting
Upper Fitting
Figure 14
Figure 15
Overfl ow Tube
Expansion Tank
Pressure Relief Valve
Expansion hose. Must
vent to the exterior of
the vehicle
Fluid Expansion Tank
Hole in the coach bay
fl oor for overfl ow hose
Tension Clamp
Tension Clamp
NOTE: The top of the expansion tank must be mounted
higher than the highest point on the Aqua-Hot.
Tension Clamp