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• 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 exist-
ing 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
R-410A systems operate at higher pressures than R-22 sys-
tems. Do not use R-22 service equipment or components on R-
410A equipment.
3
CAUTION
!
The units are weatherized for mounting outside of the building.
The information on the rating plate is in compliance with the
FTC and DOE rating for single phase units. The following infor-
mation is for three phase units which are not covered under
t
he DOE certification program.
1. The efficiency rating of this unit is a product thermal effi-
ciency rating determined under continuous operating condi-
tions independent of any installed system.
B. MAJOR COMPONENTS
The unit includes a hermetically-sealed refrigerating system
(consisting of a compressor, condenser coil, evaporator coil
with thermal expansion valve), a circulation air blower, a con-
denser fan, and all necessary internal electrical wiring. The
cooling system of these units is factory-evacuated, charged
and performance tested. Refrigerant amount and type are indi-
c
ated on rating plate.
C. R-410A REFRIGERANT
All units are factory charged with R-410A refrigerant.
1. 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 units.
Pressure: The pressure of R-410A is approximately 60%
(1.6 times) greater than R-22. Recovery and recycle equip-
ment, 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 ser-
vice 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 performed safely with nitrogen or a mix-
ture 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 equip-
ment is designed to operate with R-410A.