Winterization; Winterizing The Domestic Water Heating System; De-Winterizing The Domestic Water Heating System - Aqua-Hot 375 LP Owner's 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 any time the heater is
stored where freezing temperatures may be experienced.

Winterizing the Domestic Water Heating System:

Please follow these instructions when winterizing the Aqua-
Hot's Domestic Water Heating System; reference Figure 8:
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 Antifreeze.
Fresh
Water Storage
Tank
Arrows indicate directional flow of
domestic hot water
Domestic
Hot Water
Demand
Pump
®
© 2011 Aqua-Hot 375LP Hydronic Heating System Owner's Manual
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 faucets.
6. Remove the hose and reconnect the domestic water demand
pump's suction line to the fresh water storage tank.

De-Winterizing the Domestic Water Heating System:

For de-winterization, completely fill the fresh water storage tank.
Open and close all interior and exterior water faucets, one at a
time, until only clear water is present/visible.
Reference Figure 8.
If disinfecting the potable water system after de-winterizing, be
sure to follow RVIA's "Instructions for Disinfection of Potable
Water Systems on Recreation Vehicles." These instructions
can be obtained by contacting the Recreational Vehicle Industry
Association at (703) 620-6003, visiting them online at
www.rvia.com, or writing to them at the following address:
Recreation Vehicle Industry Association
1896 Preston White Drive
P.O. Box 2999
Reston, VA 20195-0999
Outlet
Domestic
Cold Water
Inlet
W
INTERIZATION
To Hot Water Faucets
AT—Indicates options
for mounting an
Accumulator Tank.
To Cold Water
Faucets
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