Installation - Fujitsu FO2416RTJNAA Installation Instructions Manual

4.0 INSTALLATION

4.1 Tools and Refrigerant
4.1.1 Tools Required for
Installing and Servicing
R-410A Models
Manifold Sets:
Manifold Hoses:
Recovery Cylinders:
– Dept. of Transportation 4BA400 or BW400
Ambient and Tube
Thermometers
Manifold
Gauge
Set
Brazing
Rods
Torch
CAUTION:
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
Composition: R-410A is a near-azeotropic
125).
8
Crescent Wrench
Allen Wrench
Recovery
Cylinders
Reclaimer Nitrogen
R-410A systems operate
Pressure: The pressure of R-410A is
approximately 60% (1.6 times) greater than
R-22. Recovery and recycle equipment, pumps,
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.
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
• R-410A refrigerant cylinders are light rose in
color.
POE oil used in R-410A systems.
refrigerants. Prior to March 1999, R-410A
refrigerant cylinders had a dip tube. These
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.
in the liquid line at the time of installation. Only
manufacturer-approved liquid line filter driers
holding capacity if the system is properly
evacuated.
• Desiccant (drying agent) must be compatible for
POE oils and R-410A refrigerant.