Troubleshooting; General Information; Appendix A: Antifreeze Types - Aqua-Hot 375 LP Owner's Manual

T
ROUBLESHOOTING
Should the Aqua-Hot Hydronic Heating System fail
to operate, complete the following checks:
1) Verify that the Aqua-Hot's access cover is se-
curely installed. The Aqua-Hot Hydronic Heat-
ing System will not operate if the access cover
is not fully installed.
2) Ensure that the main propane tank contains a
sufficient level of propane.
A A: A
PPENDIX NTIFREEZE
The following information addresses the necessary
usage of a propylene glycol based "boiler" type anti-
freeze in the Aqua-Hot. Propylene glycol is a safer
alternative to the more toxic ethylene glycol anti-
freeze; however, as
(International Association of Plumbing and Me-
chanical Officials), only those propylene glycol based
"boiler" type antifreezes deemed "Generally Recog-
nized as Safe" (GRAS) by the FDA should be util-
ized.
Because of the significant impact various types of
antifreeze can have on a hydronic heating system,
including the level of safety provided, it has been
recognized that there is a need to provide an expla-
nation regarding two additional prominent types of
antifreeze/coolant available. The following informa-
tion should be utilized as an educational means of
ensuring that the proper type of propylene glycol
based antifreeze is selected:
RV & Marine Antifreeze:
These types of propylene glycol based antifreeze
products are formulated
"winterizing" applications only. Although RV &
Marine antifreeze is often "Generally Recognized as
Safe" by the FDA, it should never be used in the
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T
YPES
mandated by IAPMO
specifically for
®
© 2009 Aqua-Hot 375-LP Hydronic Heating System Owner's Manual
3) Ensure that the Aqua-Hot's boiler tank has an ade-
quate supply of antifreeze and water heating solu-
tion by checking the level at the expansion tank. If
the level is low, reference the maintenance section
of this manual for refilling instructions.
4) Verify that the wires attached to the ground strip
are firmly attached; reference Figure 1-B
If the Aqua-Hot Heating System's failure to operate is
not resolved with the aforementioned checks, please
contact the Aqua-Hot Heating Systems Technical Sup-
port Department at 1-800-685-4298 for additional as-
sistance or visit the web site at www.aqua-hot..com
Aqua-Hot's Hydronic Heating System. This type of
antifreeze is not formulated to transfer heat, which is
essential to the heating system's functionality and
does not contain rust inhibitors. Please note, how-
ever, that RV & Marine antifreeze can be utilized to
winterize the Aqua-Hot's Domestic Hot Water
Heating System.
Automotive Antifreeze/Coolant:
These types of propylene glycol based antifreeze
products are formulated specifically to protect auto-
motive engines against corrosion, freezing tempera-
tures, and overheating. They also have excellent
heat transfer and thermal conductivity characteris-
tics. Although these types of antifreeze products are
considered less toxic and safer than ethylene glycol
for people, pets, and the environment, they are not
"Generally Recognized as Safe" (GRAS) rated by the
FDA. Therefore, they must be marked with a
"harmful if swallowed" warning.
warning is required because these types of antifreeze
products contain high levels of chemical rust inhibi-
tors. Due to their potentially hazardous properties,
they should never be used in the Aqua-Hot's Hy-
dronic Heating System.
This additional