Appendix F: Winterization Process - Aqua-Hot 400 Series Service Manual

Not winterizing the Aqua-Hot when freezing temperatures
are present will result in serious damage to the Aqua-Hot's
domestic water heating system. Also, be sure to use an FDA
approved, "GRAS" rated antifreeze for winterization.
NOTE: The Aqua-Hot can continue to be used for interior
zone heating once the domestic water heating system, has
been drained and winterized.
The Aqua-Hot's domestic water heating system must be
completely drained of domestic water and properly winter-
ized anytime the heater is stored where freezing tempera-
tures may be experienced.
Winterizing the Domestic Water Heating System:
Please follow these instructions when winterizing the Aqua-
Hot's Domestic Water Heating System. Reference the figure
below.
1. Completely drain the fresh water storage tank.
2. Disconnect the domestic water demand pump's suction
line from the fresh water storage tank.
3. Attach an adequate piece of hose onto the suction side
of the domestic water demand pump.
4. Place the opposite end of the hose into an adequate
supply of FDA-approved "GRAS" RV winterization anti-
freeze and turn on the demand water pump.
Figure C-1
5. Open and close all interior and exterior water faucets,
one at a time, until only pure RV antifreeze is present.
Perform this procedure for both the hot and cold fau-
cets.
6. Turn off the demand water pump and remove the hose
and reconnect the domestic water pump's suction line
to the fresh water storage tank.
An FDA approved "GRAS" rated winterization antifreeze
must be used. You CANNOT blow domestic water coil out
with air to winterize an Aqua-Hot.
De-Winterizing the Domestic Water Heating System:
For de-winterization, completely fill the fresh water stor-
age tank. Turn on the demand water pump and open and
close all interior and exterior water faucets, one at a time,
until only clear water is present/visible.
If disinfecting the potable water system after de-
winterizing, be sure to follow RVIA's "Instructions for Disin-
fection of Potable Water Systems on Recreation Vehicles."
These instructions can be obtained by contacting the Recre-
ational Vehicle Industry Association at 703-620-6003, visit-
ing them online at rvia.com, or writing them at the following
address:
Recreational Vehicle Industry Association
1896 Preston White Drive
P.O. Box 2999
Reston, VA 20195-0999
© Aqua-Hot® AHE-400-P01 Service Manual Rev.B June 2014
Section #: Title
Appendix C: Winterizing
p.
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