Piping Recommendations - Dunkirk 90-50 Installation, Operation & Maintenance Manual

When fillingthe boiler w ater isthepreferred heating s olution. Most
potable water s upplies may beused tocharge and re-fill p rovided the
chlorine a nd chloride i ons levels a re less t han100 ppm.
Antifreeze may beused i n most a pplications provided allofthefol-
lowing conditions are met:
1. Unless astrict s chedule ofsampling, analysis and maintenance
oftheantifreeze solution i sfollowed, theboiler m ust b epiped
as aprimary l oop connected tosecondary loop asshown i nthe
Piping &WiringDiagram A ppendix. Failure t operform regular
rnaintenance totheantifreeze rnanufacturer's instructions will
result in damage totheheat e xchanger and thevoiding o fboiler
warranty.
2. Only theantifreeze manufacturers listed below are selected.
3. Atinstallation ofanew orreplacement boiler a nd atleast on
anannual basis t hesystem a ntifreeze must b eanalyzed bythe
antifreeze supplier ortheirrecommended laboratory.
4. Adjustments tothesystem antifreeze must b emade according
totheantifreeze manufacturers recornrnendations using only
theirrecornrnended products.
S. All existing systems MUST be flushed of ALL old system fluid.
Failure to do so may void the boiler warranty if evidence of im-
proper flushing is revealed. Consult with your heating profes-
sional for recommendations.
Piping Recommendations
Systemleaks may not alwaysbe visible.An unseen system leak will
become obvious if boiler pressure decreaseswhen make up valve is
closed.
All systernleaks must be repaired immediately.Constant introduc-
tion 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 recornmended antifreeze solutions found in this rnanual. See
the Piping & Wiring Diagram Appendix.
Water Chemistry
This boiler is designed for a closed loop hydronic heat systernONLY!
This boiler is not suitablefor natural gravity type installations, or any
other open type systern.
Systernfluid pH rnust be rnaintained between 7.0 and 8.0.
Maintain water hardness below 7 grains hardness.
Fillingwith chlorinated fresh water should be acceptablesince
drinldng water chlorine levelsare typicallyless than 5 ppm. Do not
fillboiler with water containing chlorine and chloride ions levels
greater than 100pprn.
Do not use inhibitors or other additivesthat are not specificallyap-
proved by the antifreeze rnanufacturer 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 manufacturers'
products, Doing so will void the warranty of the boiler,
Consideration MUST be given to cleaning the heating systern,
particularly in retrofit situations where a new boiler with an
alurninurn heat exchanger is being installed in an existing piping
systern.
All existing systems rnust be cleaned and flushed according to the
antifreeze rnanufacturer's recornrnendations.
Systerns that have antifreeze that is not recornmended by the boiler
rnanufacturer rnust be completely flushed to ensure no unapproved
antifreeze remains according to the recomrnended antifreeze
rnanufactures recornrnendations. Evidence of an alternate antifreeze
in the systern may void the boiler warranty.
In older systems obviously discolored, murky or dirty water; or a pH
reading outside the boiler rnanufacturer's stated acceptable range
(pH 7.0 to 8.0) are indications that the systern should be cleaned or
treated.
1. Measure total capacity of the systern including the piping,
tanks, boiler, collector plates, etc. The most accurate rnethod
of rneasuring fluid capacity is to fill the system and then
cornpletely drain it, volurnetrically rneasuring the fluid drained.
2. Thoroughly flush the systern with clean water to remove any
sediment or contarninants. Sludge and iron oxide deposits can
cause rapid breakdown of inhibitors.
3. Cleaning fluid - Flushing with clean water is preferred. If
cleaning fluid is used, only use cleaner specifically approved for
use with aluminurn boilers. Use only cleaning fluids and the
procedure recornrnended by the antifreeze rnanufacturer.
Freeze Protection
Aluminum Safe Antifreeze, Treatments and Additive
Guidelines:
Antifreeze, if required, must be one of the antifreeze manufacturers
listed in this rnanual. See the "Recommended Alurninurn Antifreeze
& Inhibitor Suppliers" section of this rnanual for a list of boiler
rnanufacturer approved products.
Always clean system prior to using antifreeze, refer to the Cleaning
the Hydronic Systern section of this rnanual for details.
Only use the antifreeze rnanufacturers' products outlined in this
docurnent.
Use of antifreeze rnust be in accordance with local plurnbing codes.
Dispose of old antifreeze and boiler systern water in accordance with
local authorities.
Antifreeze will raise the pH of the hydronic solution in
a heating system above the recommended level due to
the corrosion inhibitors in the antifreeze. The solution
must be treated to rnaintain a pH within the boiler rnanufacturer's
recornmended level to avoid darnage to the heat exchanger. Follow
antifreeze manufacturer's instructions for details on how to adjust
the pH.