22
XII - wATER TREATmEnT & fREEZE PROTECTIOn
When filling the boiler water is the preferred heating solution. Most
potable water supplies may be used to charge and re-fill provided
the chlorine and chloride ions levels are less than 100 ppm.
Antifreeze may be used in most applications provided all of
the following conditions are met:
Unless a strict schedule of sampling, analysis and main
-
1.
tenance of the antifreeze solution is followed, the boiler
must be piped as a primary loop connected to secondary
loop as shown in the Piping & Wiring Diagram Appendix.
Failure to perform regular maintenance to the antifreeze
manufacturer’s instructions will result in damage to the
heat exchanger and the voiding of boiler warranty.
Only the antifreeze manufacturers listed below are selected.
2.
At installation of a new or replacement boiler and at least
3.
on an annual basis the system antifreeze must be ana
-
lyzed by the antifreeze supplier or their recommended
laboratory.
Adjustments to the system antifreeze must be made ac
-
4.
cording to the antifreeze manufacturers recommenda
-
tions using only their recommended products.
All existing systems MUST be flushed of ALL old system
5.
fluid. Failure to do so may void the boiler warranty if evi
-
dence of improper flushing is revealed.
Consult with your heating professional for recommendations.
Piping Recommendations
System leaks may not always be visible. An unseen sys
-
•
tem leak will become obvious if boiler pressure decreas
-
es when make up valve is closed.
All system leaks must be repaired immediately. Constant
•
introduction of make up water will introduce dissolved
oxygen, resulting in accelerated boiler corrosion.
It is recommended that Primary/Secondary piping be
•
used with any of the recommended antifreeze solutions
found in this manual. See the
Piping & wiring dia-
gram Appendix
.
water Chemistry:
This boiler is designed for a closed loop hydronic heat
•
system ONLY! This boiler is not suitable for natural grav
-
ity type installations, or any other open type system.
System fluid pH must be maintained between 7.0 and 8.0.
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Maintain water hardness below 7 grains hardness.
•
Filling with chlorinated fresh water should be acceptable
•
since drinking water chlorine levels are typically less than
5 ppm. Do not fill boiler with water containing chlorine
and chloride ions levels greater than 100 ppm.
Do not use inhibitors or other additives that are not spe
-
•
cifically approved by the antifreeze manufacturer for this
product.
Consult the antifreeze manufacturer if any of the above
•
are outside the stated ranges.
Cleaning the hydronic System:
ImPORTAnT: do not mix different manufactur-
ers’ products. doing so will void the warranty of
the boiler.
Consideration MUST be given to cleaning the heating sys
-
tem, particularly in retrofit situations where a new boiler with
an aluminum heat exchanger is being installed in an existing
piping system.
All existing systems must be cleaned and flushed according
to the antifreeze manufacturer’s recommendations.
Systems that have antifreeze that is not recommended by
the boiler manufacturer must be completely flushed to en
-
sure no unapproved antifreeze remains according to the
recommended antifreeze manufactures recommendations.
Evidence of an alternate antifreeze in the system may void
the boiler warranty.
In older systems obviously discolored, murky or dirty water;
or a pH reading outside the boiler manufacturer’s stated ac
-
ceptable range (pH 7.0 to 8.0) are indications that the system
should be cleaned or treated.
Measure total capacity of the system including the pip
-
1.
ing, tanks, boiler, collector plates, etc. The most accurate
method of measuring fluid capacity is to fill the system
and then completely drain it, volumetrically measuring
the fluid drained.
Thoroughly flush the system with clean water to remove
2.
any sediment or contaminants. Sludge and iron oxide de
-
posits can cause rapid breakdown of inhibitors.
Cleaning fluid – Flushing with clean water is preferred.
3.
If cleaning fluid is used, only use cleaner specifically ap
-
proved for use with aluminum boilers. Use only cleaning
fluids and the procedure recommended by the antifreeze
manufacturer.
