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If equipment is stored for longer than 30 days special precautions must be taken to avoid coil dam-
age. All coils should be charged and sealed with a low pressure (less the 25 PSIG) inert gas, such
nitrogen. This prevents contaminants from entering the coils. When the seal is broken at installa-
tion, the rush of escaping gas verifi es the coil is still leak free. If coils are not charged and sealed,
condensation mixes with air pollutants forming a weak acid and over time can cause pinhole leaks
to develop in coil tubes.
When equipment is installed after storage, caution should be taken to inspect and replace, if re-
quired, rubber hoses and belts. All moving parts, such as blowers and motors, should be hand
tested to ensure they are free and clear prior to start-up. Finally, verify that all lubrication is fresh
and full.
1.6 Model Identifi cation
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