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R-410A Temperature/Pressure Chart
T e m p .
P re s s u re
T e m p .
P s ig
F
F
3 2
1 0 0 .8
7 4
3 3
1 0 2 .9
7 5
3 4
1 0 5 .0
7 6
3 5
1 0 7 .1
7 7
3 6
1 0 9 .2
7 8
3 7
1 1 1 .4
7 9
3 8
1 1 3 .6
8 0
3 9
1 1 5 .8
8 1
4 0
1 1 8 .0
8 2
4 1
1 2 0 .3
8 3
4 2
1 2 2 .6
8 4
4 3
1 2 5 .0
8 5
4 4
1 2 7 .3
8 6
4 5
1 2 9 .7
8 7
4 6
1 3 2 .2
8 8
4 7
1 3 4 .6
8 9
4 8
1 3 7 .1
9 0
4 9
1 3 9 .6
9 1
5 0
1 4 2 .2
9 2
5 1
1 4 4 .8
9 3
5 2
1 4 7 .4
9 4
5 3
1 5 0 .1
9 5
5 4
1 5 2 .8
9 6
5 5
1 5 5 .5
9 7
5 6
1 5 8 .2
9 8
5 7
1 6 1 .0
9 9
5 8
1 6 3 .9
1 0 0
5 9
1 6 6 .7
1 0 1
6 0
1 6 9 .6
1 0 2
6 1
1 7 2 .6
1 0 3
6 2
1 7 5 .5
1 0 4
6 3
1 7 8 .5
1 0 5
6 4
1 8 1 .6
1 0 6
6 5
1 8 4 .3
1 0 7
6 6
1 8 7 .7
1 0 8
6 7
1 9 0 .9
1 0 9
6 8
1 9 4 .1
1 1 0
6 9
1 9 7 .3
1 1 1
7 0
2 0 0 .6
1 1 2
7 1
2 0 3 .9
1 1 3
7 2
2 0 7 .2
1 1 4
7 3
2 1 0 .6
1 1 5
7 2
2 0 7 .2
1 1 4
7 3
2 1 0 .6
1 1 5
506257-01
P re s s u re
T e m p .
P re s s u re
P s ig
F
2 1 4 .0
1 1 6
3 9 6 .0
2 1 7 .4
1 1 7
4 0 1 .3
2 2 0 .9
1 1 8
4 0 6 .7
2 2 4 .4
1 1 9
4 1 2 .2
2 2 8 .0
1 2 0
4 1 7 .7
2 3 1 .6
1 2 1
4 2 3 .2
2 3 5 .3
1 2 2
4 2 8 .8
2 3 9 .0
1 2 3
4 3 4 .5
2 4 2 .7
1 2 4
4 4 0 .2
2 4 6 .5
1 2 5
4 4 5 .9
2 5 0 .3
1 2 6
4 5 1 .8
2 5 4 .1
1 2 7
4 5 7 .6
2 5 8 .0
1 2 8
4 6 3 .5
2 6 2 .0
1 2 9
4 6 9 .5
2 6 6 .0
1 3 0
4 7 5 .6
2 7 0 .0
1 3 1
4 8 1 .6
2 7 4 .1
1 3 2
4 8 7 .8
2 7 8 .2
1 3 3
4 9 4 .0
2 8 2 .3
1 3 4
5 0 0 .2
2 8 6 .5
1 3 5
5 0 6 .5
2 9 0 .3
1 3 6
5 1 2 .9
2 9 5 .1
1 3 7
5 1 9 .3
2 9 9 .4
1 3 8
5 2 5 .8
3 0 3 .8
1 3 9
5 3 2 .4
3 0 8 .2
1 4 0
5 3 9 .0
3 1 2 .7
1 4 1
5 4 5 .6
3 1 7 .2
1 4 2
5 5 2 .3
3 2 1 .8
1 4 3
5 5 9 .1
3 2 6 .4
1 4 4
5 6 5 .9
3 3 1 .0
1 4 5
5 7 2 .8
3 3 5 .7
1 4 6
5 7 9 .8
3 4 0 .5
1 4 7
5 8 6 .8
3 4 5 .3
1 4 8
5 9 3 .8
3 5 0 .1
1 4 9
6 0 1 .0
3 5 5 .0
1 5 0
6 0 8 .1
3 6 0 .0
1 5 1
6 1 5 .4
3 6 5 .0
1 5 2
6 2 2 .7
3 7 0 .0
1 5 3
6 3 0 .1
3 7 5 .1
1 5 4
6 3 7 .5
3 8 0 .2
1 5 5
6 4 5 .0
3 8 5 .4
3 9 0 .7
3 8 5 .4
3 9 0 .7
Table 5
P s ig
5. Compare the subcooling value with those shown in
Table 6. If subcooling is greater than shown, recover some
refrigerant. If subcooling is less than shown, add some
refrigerant.
Temp.°F
Charge Using Approach Method (TXV System) - Outdoor
Temperatures 65°F or Above
The following procedure is intended as a general guide and
is for use on expansion valve systems only. For best results,
indoor temperature should be 70°F to 80°F. Monitor system
pressures while charging.
1. Record outdoor ambient temperature using a digital
thermometer.
2. Attach high pressure gauge set and operate unit for
several minutes to allow system pressures to stabilize.
3. Compare stabilized pressures with those provided
in Table 8. Minor variations in these pressures may be
expected due to differences in installations. Significant
differences could mean that the system is not properly
charged or that a problem exists with some component
in the system. Pressures higher than those listed indicate
that the system is overcharged. Pressures lower than those
listed indicate that the system is undercharged. Verify
adjusted charge using the approach method.
4. Use the same digital thermometer to check liquid line
temperature.
5. Subtract the outdoor ambient temperature from the liquid
line temperture to determine the approach temperature.
Issue 1330
Subcooling Values
Model
-24
-36
7
2
Tabel 6
-48
-60
5
7
Page 15 of 29
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