Daikin MPS015 F - All-Aluminum Condenser Coils; Connecting the Condenser Coil to Copper Tubing

All-Aluminum Condenser Coils
The condenser coils are an all-aluminum design including the
connections, micro-channels, ns (an oven brazing process
brazes the ns to the micro-channel at tube), and headers
(Figure 82), which eliminates the possibility of corrosion
normally found between dissimilar metals of standard coils.
During the condensing process, refrigerant in the coil passes
through the micro-channel at tubes, resulting in higher
efciency heat transfer from the refrigerant to the airstream.
In the unlikely occurence of a coil leak, contact Daikin to
receive a replacement coil module.
Figure 82: Micro-Channel Coil Cross-Section
Connecting the Condenser Coil to Copper
Tubing
Figure 83 shows the aluminum condenser coil connection
to the copper tubing in the unit. Because of the low melting
point of aluminum (1220°F compared to 1984°F for copper),
this brazed joint is performed with a low temperature brazing
process.
CAUTION
Potential equipment damage. If a standard copper brazing
process is performed at this joint, the process will damage the
aluminum connection. If a condenser coil ever needs to be
replaced, the copper aluminum joint repair should be done with
a ProBraze™ repair kit manufactured by OmniTechnologies
Corporation. A non-corrosive ux must also be used. The
brazing temperature should be between 850°F–900°F. If
a coil needs replacing, contact Daikin for a coil and copper
connection assembly.
Figure 83: Aluminum/Copper Connection
maInTenanCe
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