Hitecsa EQS 2335 Manual Del Usuario página 55

II.2.3.2 Recommendations for selection
The following recommendations on when to choose the MCHXE
treatment are based on the evaluation of the unit's installation
environment.
Will the cooler be installed
in a marine environment?
(minimum distance from the
coast 20km, or even more if
the direction of the wind is
mainly from the sea and
moves inland)
Will the chiller be installed
in a rural/urban/industrial
environment with
polluting agents or
potentially corrosive
substances?
Is there the risk of specific
pollution in the chiller
installation area?
(for example: animal farms,
hospitals, airports, volcanic
areas)
In that case, the MCHXE accessory is not required
Protection against corrosion of MCHX
The layer of natural aluminium oxide is very strong/thick and acts as
protection against corrosion to the underlying metal. This does not
mean that the aluminium is sufficiently protected by the oxide layer for
all applications and conditions. This depends on the corrosiveness of
the environment.
Electrofin® E-coating
There are different anti-corrosion protective coatings on the market
suitable for HVAC components. Many of these have proven to be
reliable in the field over a number of years. However, for the MCHX
heat exchanger, only certain coating solutions are advisable.
HITECSA offers the E-coating treatment solution with the
MCHXE accessory.
E-coating technical performances
Coating thickness: 15-30 micron (ASTM D7091-05)
Immersion in water: >1000 hours @ 38°C (ASTM D870-02)
Resistance to humidity: minimum 1000 hours (ASTM D2247-99)
Heat exchange reduction: <1% (ARI 410)
pH Range: 3-12
Storage temperature limits: -40 – 163°C
provide for
E-Coating
provide for
E-Coating
provide for
E-Coating
The Electrofin ® E-Coating is a water-based epoxy polymer coating.
The E-coat (PPG Powercron ®) formula is designed to provide an
excellent coverage, even in the corners of the fins. The Electrofin ® E-
Coating is a UV resistant technology and suitable to protect MCHX from
aluminium corrosion with 100% coverage, without solution of continuity.
The thickness of the coating layer is 15-30 micron, minimising the loss
of performances. The following specifications are ensured:
Reference regulations
MIL-C-46168 Resistance to chemical agents – DS2, HCl Gas
MIL-P-53084 (ME)-TACOM Approval
ASTM B117-G85 Saline spray modified (Fog) 2000 hours of test
57
EQS