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724-746-5500 | blackbox.com
724-746-5500 | blackbox.com
Page 41
Chapter 2: Installation
2.10.3 Refrigerant Characteristics
2.10.3.1 Pressure/Temperature Settings
The following table is provided to assist with the normal settings of the system for R410A refrigerant. Where applicable, minimum
and maximum settings are given along with normal operating pressures.
Table 2-11. R410A refrigerant pressure/temperature settings.
Normal Min. Max.
Sub-cooling °F 10 5 20
Superheat °F 15 10 20
Design Condensing Temp. @ 95°F
Ambient
125
105
140
Suction Pressure (psig) 130
105
140
Fan Cycling Control—Fan On (psig) 440
330
480
Fan Speed Control (psig) 440
—
—
2.10.3.2 Saturated Refrigerant Pressure
The following refrigerant temperature/pressure table is provided for reference for R410A refrigerant.
Table 2-12. R410A refrigerant pressures.
Temperature (°F) Pressure (psig) Temperature (°F) Pressure (psig)
20 78.4 75 218
22 81.9 80 236
24 85.5 85 255
26 89.2 90 274
28 93.1 95 295
30 97.0 100 318
32 101 105 341
34 105 110 365
36 109 115 391
38 114 120 418
40 118 125 446
42 123 130 477
44 128 135 508
46 133 140 541
48 137 — —
50 143 — —
55 155 — —
60 170 — —
65 185 — —
70 201 — —