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o
nly propylene glycol based
"gras" (g
deemed
enerally
fda
shall be used In the
. f
system
aIlure to use the above specIfIed antIfreeze
type could result In serIous Injury or death
Ensure that the overflow tube is connected from the Aqua-Hot's
expansion tank connection to the expansion tank's bottom con-
nection and from the expansion tank's top connection through
the overflow tube hole in the motorhome's bay floor prior to
beginning this antifreeze and water heating solution fill proce-
dure. Failure to do so could result in an antifreeze spill in the
motorhome's bay. Reference Figure 11.
"
"
boIler
type antIfreeze
r
s
)
ecognIzed as
afe
by the
a
-h
'
qua
ot
s hydronIc heatIng
.
Drain valve
© 2008 Aqua-Hot
®
600-D Hydronic Heating System Installation Manual
section 10: Purging the system
Purging the Hydronic Heating System:
In order to provide the best freeze protection, boil-over
protection, and anti-corrosion and rust protection, a
50/50 mixture of "GRAS" approved propylene glycol
antifreeze and water is recommended.
Reference Appendices D through F for additional
information regarding the antifreeze and water heating
solution. Be sure to use a "GRAS" boiler-type pro-
pylene glycol based antifreeze rather than an RV and
Marine antifreeze or an automotive antifreeze/coolant.
If assistance is needed in selecting an appropriate
50/50 antifreeze and water mixture, please contact
the Aqua-Hot Heating Systems Product Application
Department at 1-800-685-4298.
1.
Open the Aqua-Hot's drain valve located at the front
of the heater. Reference Figure 46.
2.
Connect a piece of ½ inch PEX tubing (this piece
should be long enough to be used to transport the
antifreeze and water heating solution from its source to
the Aqua-Hot) to the drain valve.
Figure 46
air-Release Valve
Expansion tank connection
Figure 47
— Page 35 —
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