
8
Tools
4.0 INSTALLATION
4.1 Tools and Refrigerant
4.1.1 Tools Required for
Installing and Servicing
R-410A Models
Manifold Sets:
²8SWR36,*>N3D@+LJK6LGH
²8SWR36,*>N3D@/RZ6LGH
²36,*>N3D@/RZ6LGH5HWDUG
Manifold Hoses:
²6HUYLFH3UHVVXUH5DWLQJRI36,*>N3D@
Recovery Cylinders:
²36,*>N3D@3UHVVXUH5DWLQJ
– 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.
4.1.2 Specifications 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 heat pumps.
Physical Properties:
R-410A has an atmospheric
boiling point of -62.9°F [-52.7°C] and its saturation
SUHVVXUHDW)>&@LVSVLJ>N3D@
Composition:
R-410A is a near-azeotropic
PL[WXUHRIE\ZHLJKWGLIOXRUR)&
DQGE\ZHLJKWSHQWDIOXRU)&
125).
Pressure: The pressure of R-410A is
approximately 60% (1.6 times) greater than
R-22.
Recovery and recycle equipment, pumps,
KRVHVDQGWKHOLNHPXVWKDYHGHVLJQSUHVVXUH
ratings appropriate for R-410A.
Manifold sets need
to range up to 800 psig [5,516 kPa] high-side and
250 psig [1,724 kPa] low-side with a 550 psig
[3,792 kPa] low-side retard. Hoses need to have
a service pressure rating of 800 psig [5,516 kPa].
Recovery cylinders need to have a 400 psig [2,758
kPa] service pressure rating, DOT 4BA400 or DOT
BW400.
Combustibility:
At pressures above 1
atmosphere, a 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.
/HDNFKHFNLQJFDQ
EHSHUIRUPHGVDIHO\ZLWKQLWURJHQRUDPL[WXUHRI
R-410A and nitrogen.
4.1.3 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
RSHUDWHZLWK5$
• R-410A refrigerant cylinders are light rose in
color.
5$DVZL)&VLVRQO\FRPSDWLEOH
ZLWK32(RLOV
9DFXXPSXPSVZLOOQRWUHPRYHPRLVWXUHIURP
POE oil used in R-410A systems.
5$V\VWHPVDUHWREHFKDUJHGZLWKOLTXLG
refrigerants. Prior to March 1999, R-410A
refrigerant cylinders had a dip tube. These
F\OLQGHUVVKRXOGEHNHSWXSULJKWIRUHTXLSPHQW
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.
$IDFWRU\DSSURYHGELIORZOLTXLGOLQHILOWHUGULHU
LVVKLSSHGZLWKHYHU\XQLWDQGPXVWEHLQVWDOOHG
in the liquid line at the time of installation. Only
manufacturer-approved liquid line filter driers
VKRXOGEHXVHG)LOWHUGULHUVPXVWKDYHDZRUNLQJ
SUHVVXUHUDWLQJRIDWOHDVWSVLJ>N3D@
7KHILOWHUGULHUZLOORQO\KDYHDGHTXDWHPRLVWXUH
holding capacity if the system is properly
evacuated.
• Desiccant (drying agent) must be compatible for
POE oils and R-410A refrigerant.
Ambient and Tube
Thermometers
Manifold
Gauge
Set
Brazing
Rods
Torch
Nitrogen
Reclaimer
Recovery
Cylinders
Allen Wrench
Crescent Wrench