Airxcel Aqua-Hot 600 Series, Installation Manual

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Purging the Heating Loop
©Aqua-Hot® 600D Installation Manual p. 43
Winterizing the Aqua-Hot
The Aqua-Hot’s domestic water heating system must be
completely drained of domestic water at any time the heater is
stored where freezing temperatures may be experienced.
Please follow these instructions when winterizing the Aqua-
Hot domestic water heating system. Reference Figure 87 for a
system overview.
1. Completely drain the fresh water storage tank.
2. Disconnect the domestic water demand pump 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 non-toxic RV winterization antifreeze (FDA certifi ed as
“GRAS” Generally Recognized As Safe must be used) and
allow the fl uid to pump through.
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 cold and hot water faucets.
6. Remove the hose and reconnect the domestic water
demand pump’s suction line to the fresh water storage
tank.
Winterizing the Aqua-Hot
Not winterizing the Aqua-Hot when freezing temperatures
are present will result in SERIOUS damage to the Aqua-Hot
domestic water heating system. Ensure that only non-toxic
RV antifreeze (FDA approved “GRAS” antifreeze) rated for
winterization is used when winterizing this unit. The warranty
does not cover freeze damage.
NOTE: The Aqua-Hot can continue to be used for interior heat
once the domestic hot water system has been winterized.
De-Winterization
To de-winterize the Aqua-Hot system, completely fi ll the fresh
water storage tank. Open and close the interior and exterior
faucets, one at a time, until only clear water is present.
Disinfecting the Domestic Water System
The Aqua-Hot Heating systems contain copper tubing and are
not compatible to prolonged exposure to sodium hypochlorite
(bleach or liquid bleach). Using products containing bleach,
including water refreshers, may cause corrosion of the domestic
water lines, resulting in a catastrophic failure of the Aqua-Hot
system by creating leaks that cannot be repaired. This damage
is not covered by the Aqua-Hot warranty.
If disinfecting the hot water system, be sure to follow NFPA
1192 Standard on Recreational Vehicles “Instructions for
Disinfection of Potable Water Systems” or any other applicable
local standards for Potable Water Systems.
NOTE:
Extended exposure to household bleach will corrode the
components of the Aqua-Hot will potentially dramatically shorten
the operational lifetime of the Aqua-Hot. Under no circumstances
is the Aqua-Hot to be exposed to household bleach for extended
periods of time.
To Hot Water Faucets
Tempered
Domestic Hot Water
Fresh Water
Storage Tank
Cold Water Faucets
Demand Pump
Figure 87
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Indicates options for mounting
an Accumulator Tank.
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