Bryant HK32EA008 - Aluminum Coil Removal

Residential Air Conditioners and Heat Pumps Using R-22 and Puron® Refrigerant: Application Guideline and Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Aluminum Coil Removal
For all aluminum coils, the coil has two or four (depending on size of
unit) fin isolators on the top of the coil as shown in Fig. 31. These must
be reinstalled onto replacement coil.
Fabricate a metal braze shield of approximately 8” X 8” to protect
aluminum components when brazing (see Fig. 32).
The orientation of the fin isolator is shown in Fig. 33. There is a threaded
mechanical fitting on the liquid distributor. This connection is not field
serviceable and should not be disturbed.
The copper stub tube connection to the liquid service valve needs to be
un-brazed for coil removal. (See Fig. 34.)
A13187A
Fig. 31 – Fin Isolator Location
A190396
Fig. 32 – Use Braze Shield to Protect Aluminum
A13186A
Fig. 33 – Fin Isolator Orientation
A13188
Fig. 34 – Copper Stub Tube Connection
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in premature corrosion failure
of aluminum coil
During coil replacement, when brazing the new coil into the unit, a
guard is needed so copper-to-copper joint braze splatter does not reach
any aluminum parts. This can cause pitting and premature failure due
to corrosion.