Plumbing The Hydronic Heating System - Aqua-Hot 450-DE Installation Manual

Plumbing the Hydronic Heating System:

1. Lay out the plumbing lines for all heat exchangers.
2. Label each line with the heating loop number and des-
ignate as an inlet or an outlet line.
NOTE: Run all plumbing lines in areas where they cannot be
pinched off or damaged under normal operating con-
ditions.
Be sure to secure all lines where necessary and apply
protective shielding in areas where chafing may occur.
Rubber Coated/Closed-Type clamps are recommended
when securing the plumbing lines.
Outlet Port
(Highest Port)
Mounting
Bracket
Section 2: Hydronic Heating System
Cozy Heat Exchanger
(Rear View)
Figure 24
© 2008 Aqua-Hot ® 450-DE/DM Hydronic Heating System Installation Manual
3. Connect and clamp the outlet line from the Aqua-
Hot to the lowest port on the closest heat exchanger
for both heating loops. Reference Figures 24 and 26.
Then, connect each additional heat exchanger in the
same arrangement (low to high). Reference Figure 23.
4. Connect and clamp the inlet line from the heater to the
highest port on the last heat exchanger for both heating
loops. Reference Figures 24 and 26.
NOTE: Reference Figure 25 for visual instructions on connect-
ing PEX-type tubing to each heat exchanger.
Plumbing heat exchangers in this manner will allow
air to escape naturally. If air is trapped in any heat ex-
changer, it will significantly reduce the heat exchanger's
overall heating performance (heat output).
5. Connect and tighten all interior plumbing lines, outlet
and inlet, to the Aqua-Hot's appropriate heating loop
ports. Reference Figures 23 and 26.
Mounting
Bracket
Inlet Port
(Lowest Port)
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