R-410A quick reference guide
Refer to Installation Instructions for specific installation requirements.
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R-410A Refrigerant operates at 50–70% higher pressures than R-22. Be sure that servicing
equipment and replacement components are designed to operate with R-410A.
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R-410A Refrigerant cylinders are rose colored.
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Recovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400.
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Recovery equipment must be rated for R-410A.
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Do not use R-410A service equipment on R-22 systems. All hoses, gages, recovery cylinders,
charging cylinders and recovery equipment must be dedicated for use on R-410A systems
only.
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Manifold sets must be at least 700 psig high side and 180 psig low side with 550 psig retard.
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All hoses must have a service pressure rating of 800 psig.
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Leak detectors, must be designed to detect HFC refrigerants.
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Systems must be charged with refrigerant. Use a commercial type metering device in the
manifold hose.
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R-410A can only be used with POE type oils.
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POE type oils rapidly absorb moisture from the atmosphere.
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Vacuum pumps will not remove moisture from POE type oils.
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Do not use liquid line driers with a rated working pressure rating less than 600 psig.
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Do not install suction line driers in the liquid line.
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A liquid line drier is required on every unit.
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Do not use an R-22 TXV. If a TXV is to be used, it must be an R-410A TXV.
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Never open system to atmosphere when under vacuum.
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If system must be opened for service, evacuate system then break the vacuum with dry
nitrogen and replace filter driers.
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17406-8469.
