Enertech AV Series - Section 5: Unit Piping; Water Quality

Enertech Global, LLC 21
AV : MD/ME - Rev. A Models
Installaon and Operaons Manual
Potential ProblemChemical(s)orCondition RangeforStainlessSteelBPHE
Calcium&Magnesium Lessthan0.1ppm
pHRange 7.5‐9
TotalDissolvedSolids Norigidsetpoint
Ammonia,AmmoniumHydroxide
Not allowed
AmmoniumChloride,Ammonium Lessthan2‐20ppm
CalciumChloride/Sodium Notallowed
Chlorine Notallowed
HydrogenSulfide Lessthan0.05ppm
Sulfates Lessthan100ppm
HydrogenCarbonate Between60ppmand200ppm
HydrogenCarbonate/Sulfates Morethan1.5ppm
Calcium&Magnesium/HydrogenCarbonate Morethan0.5ppm
Conductivity Lessthan500micros/cm
IronBacteria Notallowed
IronOxide Lessthan0.2ppm
SuspendedSolids 40meshstrainerrequired
WaterVelocity Lessthan5.5m/sintheport
Scaling
Corrosion
Biological
Erosion
Notes:
1. Hardnessinppmisequivalenttohardnessinmg/l.
2. Grains/gallon=ppmdividedby17.1.
3. Unitinternalheatexchangersarenotrecommendedforpoolapplicationsorwateroutsidetherangeof
thetable.Secondaryheatexchangersarerequiredforpoolorotherapplicationsnotmeetingthe
requirementsshownabove.
4. Saltwaterapplications(approx.25,000ppm)requiresecondaryheatexchangersduetocopperpiping
betweentheheatexchanger.
5. Filterformaximumof600micronsize.
Water Quality Table
Notes:
1. Hardness in ppm is equivalent to hardness in mg/l.
2. Grains/ gallon = ppm divided by 17.1.
3. Unit internal heat exchangers are not recommended for pool applicaons or water outside the range of the table.
Secondary heat exchangers are required for pool or other applicaons not meeng the requirements shown above.
4. Saltwater applicaons (approx. 25,000 ppm) require secondary heat exchangers due to copper piping between the heat
exchanger.
5. Filter for maximum of 600 micron size.
Water Quality
Enertech recommends that all hydronic systems water be
tested prior to being used in any installaon.
Water quality is important for the Load side of the system.
Due to use of dissimilar metals throughout the system (i.e.
stainless braze plates, cast iron pump volutes, etc.) certain
minerals or chemicals may build up and become detrimental
to system operaon and longevity. Filling the system with
good quality water that meets the specicaons outlined in
table above.
The quality of the water used in hydronic systems is very
important. In closed loop systems the diluon water (water
mixed with anfreeze) must be of high quality to ensure
adequate corrosion protecon. Water of poor quality contains
ions that make the uid “hard” and corrosive. Calcium and
magnesium hardness ions build up as scale on the walls of the
system and reduce heat transfer. These ions may also react
with the corrosion inhibitors in glycol based heat transfer
uids, causing them to precipitate out of the soluon and
rendering the inhibitors ineecve in protecng against
corrosion. In addion, high concentraons of corrosive ions,
such as chloride and sulfate, will eat through any protecve
layer that the corrosion inhibitors form on the walls of the
system.
Ideally, de-ionized water should be used for diluon with
anfreeze soluons since de-ionizing removes both corrosive
and hardness ions. Dislled water and zeolite soened water
are also acceptable. Soened water, although free of hardness
ions, may actually have increased concentraons of corrosive
ions and, therefore, its quality must be monitored. The
Department of Natural Resources or your local municipality
can direct you to the proper tesng agency.
Note: Failure to adhere to the water quality guidelines may
result in loss of warranty.
Note: Once the system has been ushed and lled, Enertech
recommends the use of Fernox F1 (Enertech P/N: F-57880)
water treatment products in order to keep the system clean
and running smooth for years to come.
Secon 5: Unit Piping