Airxcel Aqua-Hot 600 Series, Installation Manual

Page: 14 / 63

Installing Heat Exchangers
©Aqua-Hot® 600D Installation Manual p. 13
Installation Requirements
Cozy heat exchangers can be mounted in one of two
confi gurations: either fl at on the ground, or vertically. Reference
Figure 21.
• Supply ventilation cross-sectional area of at least 29in
2
(74cm
2
) must be supplied to each heat exchanger.
• Do not supply heat exchangers air which is drawn from the
bay areas; air supply should only be from the living areas.
• Return air should be drawn from the same room the heat
exchanger is heating.
• The antifreeze and water heating solution must fl ow in
through the bottom of the heat exchanger, and out the top
(reference Figure 24).
• In order to provide suffi cient ventilation, the return air
registers must be the same size, or larger, than the outlet
air registers.
Vertical Orientation
Horizontal Orientation
Figure 21
Figure 22
Heat Exchanger Locations and
Clearances
• Position the heat exchangers so that even heat is distributed
throughout the coach interior.
• The fi rst heat exchanger on the loop will output the most
interior heat.
• It is best practice to place the heat exchanger in an area
where it can be easily accessed for maintenance and
cleaning.
• Place the heat exchangers as close to the fl oor as possible
for best performance.
• If a heat exchanger is kept in the fresh water storage bay,
then the last heat exchanger in the coolant loop should be
used. See fi gure 22.
• The heating air supply may be fresh or recirculated air that
is drawn from a clean area not likely to be contaminated.
Aqua-Hot advises against placing a heat exchanger on the
slide-out section of any vehicle due to the high probability
of damage occurring to the heating loop from moving parts.
NOTE: Do NOT install more than four heat exchangers per
heating loop . If additional heat exchangers are required,
use a booster pump (not included) to provide additional
antifreeze fl ow capability.
Figure 23