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R410A Temperature/Pressure Chart
T
e
m
. p
P
e r
s
s
u
e r
T
e
m
F °
P
s
g i
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
5
9
1
6
6
7 .
1
0
6
0
1
6
9
6 .
1
0
6
1
1
7
2
6 .
1
0
6
2
1
7
5
5 .
1
0
6
3
1
7
8
5 .
1
0
6
4
1
8
1
6 .
1
0
6
5
1
8
4
3 .
1
0
6
6
1
8
7
7 .
1
0
6
7
1
9
0
9 .
1
0
6
8
1
9
4
1 .
1
1
6
9
1
9
7
3 .
1
1
7
0
2
0
0
6 .
1
1
7
1
2
0
3
9 .
1
1
7
2
2
0
7
2 .
1
1
7
3
2
1
0
6 .
1
1
Page 14 of 24
. p
P
e r
s
s
u
e r
T
e
m
. p
P
e r
P
s
g i
F °
2
1
4
0 .
1
1
6
3
2
1
7
4 .
1
1
7
4
2
2
0
9 .
1
1
8
4
2
2
4
4 .
1
1
9
4
2
2
8
0 .
1
2
0
4
2
3
1
6 .
1
2
1
4
2
3
5
3 .
1
2
2
4
2
3
9
0 .
1
2
3
4
2
4
2
7 .
1
2
4
4
2
4
6
5 .
1
2
5
4
2
5
0
3 .
1
2
6
4
2
5
4
1 .
1
2
7
4
2
5
8
0 .
1
2
8
4
2
6
2
0 .
1
2
9
4
2
6
6
0 .
1
3
0
4
2
7
0
0 .
1
3
1
4
2
7
4
1 .
1
3
2
4
2
7
8
2 .
1
3
3
4
2
8
2
3 .
1
3
4
5
2
8
6
5 .
1
3
5
5
2
9
0
8 .
1
3
6
5
1
3
7
5
2
9
5
1 .
1
3
8
5
2
9
9
4 .
1
3
9
5
3
0
3
8 .
1
4
0
5
3
0
8
2 .
1
4
1
5
3
1
2
7 .
1
4
2
5
0
3
1
7
2 .
1
4
3
5
1
3
2
1
8 .
1
4
4
5
2
3
2
6
4 .
1
4
5
5
3
3
3
1
0 .
1
4
6
5
4
3
3
5
7 .
1
4
7
5
5
3
4
0
5 .
1
4
8
5
6
3
4
5
3 .
1
4
9
6
7
3
5
0
1 .
1
5
0
6
8
3
5
5
0 .
1
5
1
6
9
3
6
0
0 .
1
5
2
6
0
3
6
5
0 .
1
5
3
6
1
3
7
0
0 .
1
5
4
6
2
3
7
5
1 .
1
5
5
6
3
3
8
0
2 .
4
3
8
5
4 .
5
3
9
0
7 .
Table 6
_____ °
–
_____ °
=
_____ °
s
s
u
e r
P
s
g i
4. Subtract the liquid line temperature from the saturation
9
6
0 .
temperature (according to the chart) to determine
0
1
3 .
subcooling.
0
6
7 .
5. Compare the subcooling value with those shown in
1
2
2 .
charge chart mounted on inside of control box cover . If
1
7
7 .
subcooling is greater than shown, recover some
2
3
2 .
refrigerant. If subcooling is less than shown, add some
2
8
8 .
refrigerant.
3
4
5 .
4
0
2 .
Charge Using Superheat Method (Fixed Orifice Systems) –
4
5
9 .
Outdoor Temperatures 65° F or above
5
1
8 .
5
7
6 .
1. With the manifold gauge hose on the suction service
6
3
5 .
port and the unit operating stably, use a digital
6
9
5 .
thermometer to record the suction line temperature.
7
5
6 .
8
1
6 .
2. At the same time, record the suction line pressure
reading.
8
7
8 .
9
4
0 .
3. Use the temperature/pressure chart (Table 6 on page 13) to
0
0
2 .
determine the saturation temperature for the suction line
0
6
5 .
pressure reading.
1
2
9 .
1
9
3 .
4. Subtract the saturation temperature (according to the
2
5
8 .
chart) from the suction line temperature to determine
the superheat.
3
2
4 .
3
9
0 .
_____ °
4
5
6 .
–
5
2
3 .
_____ °
=
5
9
1 .
_____ °
6
5
9 .
7
2
8 .
5. Compare the superheat value with those shown in
charge chart mounted on inside of control box cover .. If
7
9
8 .
superheat is greater than shown, add some refrigerant.
8
6
8 .
If superheat is less than shown, recover some
9
3
8 .
refrigerant.
0
1
0 .
0
8
1 .
Charge Using Approach Method (TXV Systems)
1
5
4 .
– Outdoor Temperatures 65° F or Above
2
2
7 .
The following procedure is intended as a general guide and
3
0
1 .
is for use on expansion valve systems only. For best results,
3
7
5 .
indoor temperature should 70° F to 80° F. Monitor system
4
5
0 .
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.
Issue 1143
Saturation Temperature ° F
Liquid Line Temperature ° F
Subcooling Value ° F
Suction Line Temperature ° F
Saturation Temperature ° F
Superheat Value ° F
506762-01
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