8
SPECIFICATION OF R-410A:
Application: R-410A is not a drop-in replacement for R-22;
equipment designs
must accommodate its higher pressures. It cannot be retrofitted into R-22 condens-
ing units.
Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater
than R-22.
Recovery and recycle equipment, pumps, hoses and the like need to
have design pressure ratings appropriate for R-410A.
Manifold sets need to range
up to 800 psig high-side and 250 psig low-side with a 550 psig low-side retard.
Hoses need to have a service pressure rating of 800 psig. Recovery cylinders
need to have a 400 psig service pressure rating. DOT 4BA400 or DOT BW400.
Combustibility:
At pressures above 1 atmosphere, mixture of R-410A and air can
become combustible.
R-410A and air should never be mixed in tanks or supply
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 per-
formed safely with nitrogen or a mixture of R-410A and nitrogen.
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.
EVAPORATOR COIL
REFER TO EVAPORATOR COIL MANUFACTURER’S INSTALLATION
INSTRUCTIONS.
IMPORTANT:
The manufacturer is not responsible for the performance and opera-
tion of a mismatched system, or for a match listed with another manufacturer’s coil.
!
CAUTION
Only use evaporators rated and approved for use on (-)ARL R-410A systems.
Summary of Contents for ARL Series
Page 28: ...28 FIGURE 8 ARL 024 ARL 036 ARL 048 WIRING DIAGRAM ...
Page 29: ...29 FIGURE 9 ASL 036 WIRING DIAGRAM ...
Page 30: ...30 FIGURE 10 ARL 060 WIRING DIAGRAM ...
Page 31: ...31 ...
Page 32: ...32 CM 1005 ...
