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© 2011 Tecumseh Products Company. All rights reserved. Page 2 of 4
DRAFT COPY
DATE: September 2011 Rev. 1
REFERENCE DOCUMENT NO. RD-0027-E
After many years of testing and investigation, R410A is recognized as a suitable alternative refrigerant for R22 in
medium and high temperature applications such as residential and light commercial air conditioning.
R410A is a near azeotropic blend of hydro fluorocarbon or HFC compounds, comprising 50% of R32, 50% of
R125. It has no chlorine content, no ozone depletion potential, and only a modest direct global warming
potential. ODP = 0, GWP = 1725.
R410A is NOT a “drop-in” replacement for R22. In addition to the nearly 50% increase in pressures compared
to R22, there are also differences between R410A and R22 that must be considered when handling, processing,
and applying refrigerants. These guidelines are offered to assist in understanding the differences.
Any Tecumseh compressor with the letter “B” in the Model Number (Example: RGA5512B
XA) is approved for
use with R410A.
I. REFRIGERANT PROPERTIES
A)
Pressure/temperature table of R410A vs. R22 is shown in Figure 1.
Figure 1
Pressure/temperature table of R410A vs. R22 is shown in Figure 1.
Figure 1
Pressure
°F
°C R22 R410A R22 R410A
-40 -40.0 0.6 10.8 4.1 74.4
-30 -34.0 4.9 17.8 33.8 122.7
-20 -28.0 10.2 26.3 70.3 181.3
-10 -23.0 16.5 36.4 113.6 250.9
0 -18.0 24.0 48.3 165.5 333.0
10 -12.2 32.8 62.2 226.2 428.8
20 -9.0 43.1 78.3 297.2 539.8
30 -1.0 55.0 96.8 379.2 667.4
40 4.4 68.6 118.1 473.0 814.2
50 10.0 84.1 142.2 579.9 980.4
60 15.6 101.6 169.6 700.5 1,169.3
70 21.1 121.4 200.4 837.1 1,381.7
80 26.7 143.6 234.9 990.1 1,619.5
90 32.2 168.4 273.5 1,161.1 1,885.7
100 37.8 195.9 316.4 1,350.7 2,181.5
110 43.3 226.4 364.1 1,561.0 2,510.3
120 48.9 260.0 416.9 1,792.7 2,874.4
130 54.4 296.9 475.4 2,047.1 3,277.7
140 60.0 337.4 540.1 2,326.4 3,723.8
150 65.6 381.7 611.9 2,631.8 4,218.9
PSIG
kPa
Temperature