Carrier 19FA Series Installation Instructions Manual page 6

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CAUTION
CAUTION
DO NOT LOOSEN a packing gland nut before checking that the nut has a positive
thread engagement.
PERIODICALLY INSPECT all valves, fittings, and piping for corrosion, rust, leaks,
or damage.
PROVIDE A DRAIN connection in the vent line near each pressure relief device to
prevent a build-up of condensate or rain water.