Ingersoll-Rand 4MXW1609A1, Руководство по установке

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Warnings for refrigerant piping
Nitrogen purge during soldering
10
Wall Unit
WARNING
Danger of explosion and lethal gases!
Failure to follow safety measures in the handling of refrigerant, could lead to death or to serious injury.
Never braze or solder on refrigerant lines or on unit components which are found above atmospheric
pressure or in the presence of refrigerant. Always remove refrigerant following guidelines established by
EPA (Federal Clear Air Act) or by other appropriate state or local codes. After removing refrigerant, use
dry nitrogen to return the system to atmospheric pressure before opening the system for repairs. The
mixture of refrigerants and air under pressure may convert into fuel element in the presence of an
ignition source which could lead to explosion. Excessive heat due to brazing with tin alloy, lead alloy or
brazing in the presence of refrigerant vapors, could form highly toxic gases and extremely corrosive acid
NOTICE
Damage to system components!
Do not remove sealing caps to refrigerant connections and do not open service valves until you are ready to braze
refrigerant lines to the connections. Excessive exposure to the atmosphere (>5 min.) could contaminate the system
through entering humidity or dirt and consequently damage valve seals and promote icing on system components
during the operation.
Nitrogen purging while brazing refrigerant pipes
Flow meter
Pressure regulator
Stop valve
Ni
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en
Nitrogen
NOTICE
Avoid damages to the unit!
Never solder connections to piping without having performed a nitrogen purge. Failure to
follow this procedure could damage the unit and lead to loss of capacity and as a result
reduce the degree of confidence on the unit in the long run.
While brazing refrigerant piping, perform a flush with dry nitrogen gas. Use a pressure
regulator to maintain a flow of 0.03 CFM (0.05 m³/h) o more.