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SECTION 2
EXE-IOM-230112
Meet Water Chemistry Requirements
System water chemistry requirements are as follows:
ƒ pH: Range of 8.5 - 10.5
ƒ Oxygen: Less than 250 ppb (operating condition)
ƒ Total Iron/Copper: Less than 5 ppm
ƒ Corrosion Inhibitor: Capable of maintaining iron corrosion rates <2 mpy.
Due to changing environmental restrictions a non-heavy metal ALL
ORGANIC inhibitor is recommended which is designed for multi metal
systems including ferrous metals and yellow metals such as copper and
brass.
ƒ Chloride: Less than 200 ppm
ƒ Hardness: Less than 3.5 grains per gallon (60 ppm) in make-up/fill water.
Calcium buildup on heating surfaces is not covered under warranty.
Adhere to the following:
1. Refer to your water conditioning or chemical treatment supplier for
analysis and recommendations for proper system conditions.
2. Follow a program with appropriate monitoring and maintenance of system
water conditions as provided by your water conditioning or chemical
treatment supplier.
3. If RO/DI water is used as a source for hydronic loop water or makeup water,
it must be neutralized to a pH of 8.5 - 10.5 prior to entering the boiler.
Failure to neutralize the RO/DI water will void the pressure vessel warranty
and may cause high general corrosion rates.
The system must have an automatic pH controller to monitor and log
ƒ
the levels. This must be independent of other chemical feed systems.
Makeup water pH range must be 7.5 - 8.8; the boiler water must be
ƒ
maintained within pH range of 8.5 - 10.5.
4. Operate the boiler in a closed-loop system using water or water/glycol
(not requiring a make-up water supply). A large amount of improperly
treated make-up water can cause premature failure of the heat exchanger
resulting from scale build up. Scale build up will reduce the efficiency and
useful life of the boiler and is not covered under warranty.
5. For freeze protection, an inhibited propylene glycol is recommended.
The maximum concentration is 50% glycol by volume. Only use mixtures
formulated for hydronic systems. DOWFROST
not use automotive glycol.
6. At a minimum, the hydronic fluid should be checked for glycol
concentration and pH once a year, or per glycol manufacturer schedule. A
refractometer is recommended.
Questions? Please Contact Your Local Manufacturer's Representative
HD is recommended. Do
TM
INSTALLATION
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
This hydronic heating boiler is not
suitable for use as a domestic water
heater. Do not heat potable water,
such as used for showers, sinks,
dishwashers, or washdown process
directly through the boiler.
4
CAUTION
Some soap used for leak testing is
corrosive to certain types of metals.
Clean all piping thoroughly after
completing the leak check.
Care needs to be taken to eliminate
oxygen from the water system, as
excess oxygen in the system will
reduce the life of any boiler. The
boiler warranty does not cover heat
exchanger replacement due to oxygen
contamination of boiler water.
Heat exchanger failure due to
inappropriate water quality, foreign
matter or debris damage is not covered
under the warranty.
If the piping system attached to this
unit will be chemically cleaned, the
boiler must be disconnected from the
system and a bypass installed so that
the chemical cleaning solution does
not circulate through the boiler. If
cleaning is desired, flush the boiler with
clean domestic water only.
2-11
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