Table of Contents
Advertisement
Refer to Installation Instructions for specific installation requirements.
R-410A efrigerant operates at 50 - 70 percent higher pressures than R-22. Be sure that servicing
equipment and replacement components are designed to operate with R-410A.
R-410A efrigerant cylinders are rose colored.
Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400, or DOT BW400.
Recovery equipment must be rated for R-410A.
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.
Manifold sets must be at least 700 psig high side, and 180 psig low side, with 550 psig retard.
All hoses must have a service pressure rating of 800 psig.
Leak detectors must be designed to detect HFC refrigerants.
Systems must be charged with liquid refrigerant. Use a commercial type metering device in the
manifold hose.
R-410A can only be used with POE type oils.
POE type oils rapidly absorb moisture from the atmosphere.
Vacuum pumps will not remove moisture from POE type oils.
Do not use liquid line driers with a rated working pressure rating less than 600 psig.
Do not install suction line driers in the liquid line.
A liquid line drier is require on every unit.
Do not use a R-22 TXV. If a TXV is to be used, it must be a R-410A TXV.
Never open system to atmosphere when under a vacuum.
If system must be opened for service, evacuate system the break the vacuum with dry nitrogen and
replace all filter driers.
Figure 11: R-410A Quick Reference Guide
Subject to change without notice. Printed in U.S.A.
Copyright © 2011 by Johnson Controls, Inc. All rights reserved.
R-410A QUICK REFERENCE GUIDE
Johnson Controls Unitary Products
Norman, OK 73069
5005 York Drive
527929-BIM-F-0911
Supersedes: 527929-BIM-E-0511
Advertisement
Table of Contents
