lines, or be allowed to accumulate in storage tanks. Leak checking should never be done with a mixture of R-410A and air. Leak checking can be performed safely with nitrogen or a mixture of R-410A and nitrogen.
2. Quick Reference Guide For R-410A
•R-410A refrigerant operates at approximately 60% higher pressure (1.6 times) than R-
22.Ensure that servicing equipment is designed to operate with R-410A.
•R-410A refrigerant cylinders are pink.
•R-410A, as with other HFC’s is only compatible with POE oils.
•Vacuum pumps will not remove moisture from POE oil.
•R-410A systems are to be charged with liquid refrigerants. Prior to March 1999, R- 410A refrigerant cylinders had a dip tube. These cylinders should be kept upright for equipment charging. Post March 1999 cylinders do not have a dip tube and should be inverted to ensure liquid charging of the equipment.
•Do not install a suction line filter drier in the liquid line.
•A liquid line filter drier is standard on every unit.
•Desiccant (drying agent) must be compatible for POE oils and R-410A
3. Evaporator Coil / TXV
The thermostatic expansion valve is specifically designed to operate with R-410A. DO
NOT use an R-22 TXV. The existing evaporator must be replaced with the factory specified TXV evaporator specifically designed for R-410A.
4. Tools Required For Installing & Servicing R-410A Models
Manifold Sets:
-Up to 800 PSIG High side
-Up to 250 PSIG Low Side
-550 PSIG Low Side Retard
Manifold Hoses:
-Service Pressure Rating of 800 PSIG
Recovery Cylinders:
-400 PSIG Pressure Rating
-Dept. of Transportation 4BA400 or BW400
!CAUTION
R-410A systems operate at higher pressures than R-22 systems. Do not use R-22 service equipment or components on R-410A equipment.
V.SAFETY INFORMATION
!WARNING
USE ONLY WITH TYPE OF GAS APPROVED FOR THIS UNIT. REFER TO THE UNIT RATING PLATE.
