Carrier R-22 Application Manual And Service Manual page 49

2. Check to be sure caps are installed on service valves and that
they are tight.
3. Check to be sure tools, loose parts, and debris are removed
from the unit.
4. Check to be sure all panels and screws are in place and tight.
Desert and Seacoast Locations
Special consideration must be given to the installation and main-
tenance of condensing units and heat pumps installed in seacoast
or desert locations. Salt and the alkali content of the sand adhere
to the aluminum fins of the coil and can cause premature coil
failure due to corrosion.
Preventive measures can be taken during installations, such as:
1. Locating the unit on side of structure opposite the prevailing
winds.
2. Elevating the unit to height where drifting sand cannot pile up
against coil. Four-in.-high mounting feet or an 18-in.-high
mounting rack are available as accessories and can be used to
elevate the unit.
3. Addition of coastal filter (see pre-sale literature for accessory
listing).
Special maintenance requirements are as follows:
1. Frequent inspection of coil and base pan, especially after
storms and/or high winds.
2. Cleaning coil by flushing out sand from between coil fins and
out of base pan as frequently as inspection determines
necessary.
3. Protecting the unit in off season with cover that allows air to
circulate through but prevents sand from sifting in (such as
canvas material). Do not use plastic as plastic will hold
moisture.
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