R410A Temperature/Pressure Chart
Blocking Outdoor Coil
Temp. | Pressure |
EF | Psig |
|
|
32 | 100.8 |
|
|
33 | 102.9 |
|
|
34 | 105.0 |
|
|
35 | 107.1 |
|
|
36 | 109.2 |
|
|
37 | 111.4 |
|
|
38 | 113.6 |
|
|
39 | 115.8 |
|
|
40 | 118.0 |
|
|
41 | 120.3 |
|
|
42 | 122.6 |
|
|
43 | 125.0 |
|
|
44 | 127.3 |
|
|
45 | 129.7 |
|
|
46 | 132.2 |
|
|
47 | 134.6 |
|
|
48 | 137.1 |
|
|
49 | 139.6 |
|
|
50 | 142.2 |
|
|
51 | 144.8 |
|
|
52 | 147.4 |
|
|
53 | 150.1 |
|
|
54 | 152.8 |
|
|
55 | 155.5 |
|
|
56 | 158.2 |
|
|
57 | 161.0 |
|
|
58 | 163.9 |
|
|
59 | 166.7 |
|
|
60 | 169.6 |
|
|
61 | 172.6 |
|
|
62 | 175.5 |
|
|
63 | 178.5 |
|
|
64 | 181.6 |
|
|
65 | 184.3 |
|
|
66 | 187.7 |
|
|
67 | 190.9 |
|
|
68 | 194.1 |
|
|
69 | 197.3 |
|
|
70 | 200.6 |
|
|
71 | 203.9 |
|
|
72 | 207.2 |
|
|
73 | 210.6 |
|
|
Temp. | Pressure |
EF | Psig |
|
|
74 | 214.0 |
|
|
75 | 217.4 |
|
|
76 | 220.9 |
|
|
77 | 224.4 |
|
|
78 | 228.0 |
|
|
79 | 231.6 |
|
|
80 | 235.3 |
|
|
81 | 239.0 |
|
|
82 | 242.7 |
|
|
83 | 246.5 |
|
|
84 | 250.3 |
|
|
85 | 254.1 |
|
|
86 | 258.0 |
|
|
87 | 262.0 |
|
|
88 | 266.0 |
|
|
89 | 270.0 |
|
|
90 | 274.1 |
|
|
91 | 278.2 |
|
|
92 | 282.3 |
|
|
93 | 286.5 |
|
|
94 | 290.3 |
|
|
95 | 295.1 |
|
|
96 | 299.4 |
|
|
97 | 303.8 |
|
|
98 | 308.2 |
|
|
99 | 312.7 |
|
|
100 | 317.2 |
|
|
101 | 321.8 |
|
|
102 | 326.4 |
|
|
103 | 331.0 |
|
|
104 | 335.7 |
|
|
105 | 340.5 |
|
|
106 | 345.3 |
|
|
107 | 350.1 |
|
|
108 | 355.0 |
|
|
109 | 360.0 |
|
|
110 | 365.0 |
|
|
111 | 370.0 |
|
|
112 | 375.1 |
|
|
113 | 380.2 |
|
|
114 | 385.4 |
|
|
115 | 390.7 |
|
|
Temp. | Pressure |
EF | Psig |
116396.0
117401.3
118406.7
119412.2
120417.7
121423.2
122428.8
123434.5
124440.2
125445.9
126451.8
127457.6
128463.5
129469.5
130475.6
131481.6
132487.8
133494.0
134500.2
135506.5
136512.9
137519.3
138525.8
139532.4
140539.0
141545.6
142552.3
143559.1
144565.9
145572.8
146579.8
147586.8
148593.8
149601.0
150608.1
151615.4
152622.7
153630.1
154637.5
155645.0
Outdoor coil should be blocked one side at a time with cardboard or plastic sheet until proper testing pressures are reached.
CARDBOARD OR
PLASTIC SHEET
Figure 13
4.Subtract the liquid line temperature from the saturation temperature (according to the chart) to determine Subcooling.
°Saturation Temperature °F
_
° Liquid Line Temperature °F
=° Subcooling Value °F
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.
Subcooling Values
Table 6
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 usig a digital |
72 | 207.2 |
| 114 | 385.4 |
|
|
|
|
|
|
|
|
|
|
|
73 | 210.6 |
| 115 | 390.7 |
|
|
|
|
|
|
|
|
|
|
|
Table 5
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 |
7. | Minor variations in these pressures may be expected |
Issue 1004 | Page 14 |