TM 9-4120-371-14
Table 5-2. NORMAL OPERATING PRESSURES (In Full Cooling DECREASE
Mode.)
Temperature
Pressure Range (psig)
75F(24C)
50F(10C)
100F(38C)
120F(49C)
Outdoor Ambient
74-84
90F(32C)Return
52-62
57-67
66-76
Air to Unit
Suction
Suet ion
Suction
Suction
(Dry Bulb)
235255
370-390
175-195
300-320
Discharge
Discharge
Discharge
Discharge
80F(27C)Return
70-80
4757
53-63
6070
Air to Unit
Suction
Suction
Suction
Suction
(Dry Bulb)
2 15235
165185
290-310
360-380
Discharge
Discharge
Discharge
Discharge
70F(21C)Return
45-55
4555
57-67
4959
Air to Unit
Suction
Suction
Suction
Suction
(Dry Bulb)
140-160
285305
205-225
365385
Discharge
Discharge
Discharge
Discharge
NOTE: Wet bulb temperatures uncontrolled (dry coil)
Pressure ranges are 5 (Suction) & 10 (Discharge) psig about the tested nominal.
Table 5-3. NORMAL
OPERATING PRESSURES (In ByPass
Cycle.)
Temperature
Pressure Range (psig)
50F(10C)
75F(24C)
120F(49C)
100F(38C)
Outdoor Ambient
4757
90F(32C)
4757
4757
4757
Air to Unit
Suction
Suction
Suction
Suction
147167
105-125
284-304
208228
Discharge
Discharge
Discharge
Discharge
47-57
80F(27C)
4757
47-57
4757
Air to Unit
Suction
Suction
Suction
Suction
146-166
105-125
284304
208228
Discharge
Discharge
Discharge
Discharge
757
70F(21C)
47-574
7-57
4757 4
Air to Unit
Suction
Suction
Suction
Suction
280-300
105125
142162
205-225
Discharge
Discharge
Discharge
Discharge