Enertech EAV060 - Antifreeze Charging

Enertech Global 
EAV - EME/EMD Rev. A Models
Installaon and Operaons Manual

Calculate the total amount of pipe in the system and use 
to calculate the amount of volume for each specic secon
of the system. Add the enre volume together, and mulply
that volume by the proper anfreeze percentage needed
for the freeze protecon required in your area. Then,
double check calculaons during installaon with a
hydrometer or refractometer to determine if the correct
amount of anfreeze was added.


Type of Anfreeze
Minimum Temperature for Freeze Protecon
10°F (-12.2°C) 15°F (-9.4°C) 20°F (-6.7°C) 25°F (-3.9°C)
ProCool (Ethanol) 26% 23% 18% 13%
Methanol 21% 17% 13% 5%
Propylene Glycol* 30% 25% 20% 13%
Anfreeze soluons are shown in pure form - not premixed
*Concentraons below 25-30% (consult manufacturer) typically require addional inhibitors.
Type Size
Volume Per 100
US Gallons
Type Size
Volume Per 100
US Gallons
Copper 1” CTS 4.1 PEX .5” 1.0
Copper 1.25” CTS 6.4 PEX .75” 1.9
Copper 1.5” CTS 9.2 PEX 1” 3.2
PEX 1.25” 4.7
PEX 1.5” 6.5

The EAV unit is a monobloc design, which means that the
refrigerant circuit is completely contained in the outdoor unit
and therefore no refrigerant line set is required. Piping between
the outdoor unit and indoor module includes a water/anfreeze
mixture that must have sucient concentraon of anfreeze
not only for freeze protecon to keep the soluon from freezing
while operang, but also sucient burst protecon for mes
where power may be interrupted to the unit during extremely
cold temperatures.
Enertech recommends Fernox Alphi-11 propylene glycol
anfreeze in all systems where the minimum outdoor
temperature is below freezing and/or in systems that are
making chilled water for cooling applicaons. This is a warranty
requirement. provides guidelines for determining the
correct amount of anfreeze. Enertech recommends using the
20 year Extreme Annual Temperature shown in the ASHRAE
Fundamentals Handbook, Environment Canada, or local weather
data.  provides an example of Chicago weather data
(-17.3 deg F), which should be compared to  for the
proper concentraon of anfreeze.
Concentraon 25% 30% 35% 40% 45% 50%
Protecon
O
F 12.2 5 -0.4 -7.6 -16.6 -29.2
Burst Point
O
F 0 -20 -40 -60 -70 -80

