Daikin AGZ070E - Condenser Coil Options and Coating Considerations

IOM 1206-7 • TRAILBLAZER
™
MODEL AGZ CHILLERS 14 www.DaikinApplied.com
InsTallaTIon and applICaTIon InformaTIon
Condenser Coil Options and Coating
Considerations
The standard coils on the Trailblazer
™
chiller are an all
aluminum alloy microchannel design with a series of at
tubes containing multiple, parallel ow microchannels layered
between the refrigerant manifolds. The microchannel coils are
designed to withstand 1000+ hour acidied synthetic sea water
fog (SWAAT) test (ASTM G85-02) at 120°F (49°C) with 0% n
loss and develop no leaks.
Should the standard microchannel coil not meet the corrosion
requirements for the application, additional coil options are
available.
Aluminum n/copper tube coils consist of 3/8 inch (10 mm)
seamless copper tubes mechanically bonded into plate-type
aluminum ns. The ns have full drawn collars to completely
cover the tubes. The aluminum n/copper tube option is best
suited for non-corrosive environments, and can be repaired
onsite. This option is only available for models AGZ030-070E.
Figure 25: Aluminum Fin/Copper Tube Coils
BlackFin
™
coils include aluminum ns pre-coated with a
durable phenolic epoxy coating. In addition to providing a
durable coating on the n material, the BlackFin
™
coils provide
and epoxy barrier between the aluminum n stock and the
copper tube, to prevent the galvanic corrosion that can occur
between the dissimilar metals. This option will provide a 1000+
hour salt spray rating per ASTM B117-90. The BlackFin
™
option provides enhanced protection in mildly corrosive
environments. This option is only available for models AGZ030-
070E.
Copper-n coils consist of 3/8 inch (10 mm) seamless copper
tubes mechanically bonded into plate-type copper ns. The ns
have full drawn collars to completely cover the tubes. Since
the n and the tube materials are similar, the opportunity for
galvanic corrosion is eliminated. The copper n/copper tube
option may be used in marine environments; however this
option is not well suited for industrial or chemical atmospheric
contamination. This option is only available for models
AGZ030-070E.
ElectroFin
®
coil coating is a water-based extremely exible
and durable epoxy polymer coating uniformly applied to all
coil surfaces through a multi-step, submerged electrostatic
coating process. ElectroFin
®
condenser coils provide a 5000+
hour salt spray resistance per ASTM B117-90, applied to both
the coil and the coil frames. The ElectroFin
®
coated coils also
receive a UV-resistant urethane top-coat to provide superior
resistance to degradation from direct sunlight. This coil coating
option provides the best overall protection against corrosive
marine, industrial or combined atmospheric contamination.
This coating option may be applied to any of the untreated coil
options offered, to provide excellent longevity and resistance to
corrosion.
Table 5: Coil/Coating Selection Matrix
Coil Option
Non-
Corrosive
1
Unpolluted
Marine
2
Industrial
3
Combined
Marine-
Industrial
4
Standard Microchannel +++ - - -
Alum. Fin/Copper Tube
5
+++ - - -
Copper Fin/Copper Tube
5
+++ +++ - -
BlackFin
™5
+++ + + -
ElectroFin
®
+++ +++ +++ ++
NOTE:
1. Non-corrosive environments may be estimated by the
appearance of existing equipment in the immediate area
where the chiller is to be placed.
2. Marine environments should take into consideration
proximity to the shore as well as prevailing wind
direction.
3. Industrial contaminants may be general or localized,
based on the immediate source of contamination (i.e.
diesel fumes due to proximity to a loading dock).
4. Combined marine-industrial are inuenced by proximity
to shore, prevailing winds, general and local sources of
contamination.
5. Available for models AGZ030-070E only.