Lennox eCOMFORT R32 GAC 035S, Installation, Operating And Maintenance Manual

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• 79 • Installation manual / eCOMFORT R32-MIL166E-0222 - 09/2022
4.3.- CLEANING THE CONDENSER
4.3.1.- Air cooled condensers
Clean the coils either with a vacuum cleaner, cold water, compressed air, or with a soft brush (non metallic). On units installed in a co-
rrosive aosphere, coil cleaning should be part of the regular maintenance program. On this type of installation, all dust gathered on the
coils should be quickly removed by regular cleaning.
Caution: Do not use high pressure cleaners that could cause permanent damage to the aluminium coil fins.
For microchannel heat excahngers, the coil connexion to the circuit is made by means of a solder copper /
aluminum. This connection is protected from galvanic corrosion by a special resin encapsulated in a heats-
hrinkable sheath.
This sleeve must be regularly visually inspected during unit cleaning operations to detect a possible prema-
ture deterioration.
Specific maintenance of microchannels exchangers connection
Bad shape Good shape
Indeed with slightly corrosive aospheres, a small copper etching can lead to a loss of adhesion of
the resin thus allowing moisture to seep under the sleeve while triggering galvanic corrosion pheno-
mena between the aluminum and the Copper.
If this attack is not detected in time, a leak may appear and then force change of the exchanger.
Galvanic corrosion under
the plastic sleeve.
A LEAKAGE BY CORROSION DUE TO A LACK OF CONDENSER MAINTENANCE IS
NOT COVERED BY UNIT WARRANTY
4.- MAINTENANCE