TM5-4120-387-14 TABLE  5-2.  NORMAL  OPERATING  PRESSURES  (In  Full  Cooling  DECREASE  Mode) Temperatures Outdoor  Ambient 90°F (32°C) Return Air to Unit (Dry Bulb) 80°F (27°C) Return Air to Unit (Dry  Bulb) 70°F (21°C) Return Air to Unit (Dry Bulb) 50°F  (1OºC) 52-62 Suction 175-195 Discharge 47-57 Suction 165-185 Discharge 45-55 Suction 140-160 Discharge Pressure Range (psig) 75°F  (24°C) 57-67 Suction 235-255 Discharge 53-63 Suction 215-235 Discharge 45-55 Suction 205-225 Discharge 100°F  (38°C) 66-76 Suction 300-320 Discharge 60-70 Suction 290-310 Discharge 49-59 Suction 285-305 Discharge 120°F  (49°C) 74-84 Suction 370-390 Discharge 70-80 Suction 360-380 Discharge 57-67 Suction 365-385 Discharge NOTE: Wet  bulb  temperature  uncontrolled  (dry  coil) Pressure ranges are ±5 (Suction) and ±10 (Discharge) psig about the tested nominal. TABLE  5-3.  NORMAL  OPERATING  PRESSURES  (In  By-Pass  Cycle) Temperatures Outdoor  Ambient 90°F (32°C) Return Air to Unit 80°F (27°C) Return Air to Unit 70°F (21°C) Return Air to Unit 50°F  (1O°C) 47-57 Suction 105-125 Discharge 47-57 Suction 105-125 Discharge 47-57 Suction 105-125 Discharge Pressure Range (psig) 75°F  (24°C) 47-57 Suction 147-167 Discharge 47-57 Suction 146-166 Discharge 47-57 Suction 142-162 Discharge 100°F  (38°C) 47-57 Suction 208-228 Discharge 47-57 Suction 208-228 Discharge 47-57 Suction 205-225 Discharge 120°F  (49°C) 47-57 Suction 284-304 Discharge 47-57 Suction 284-304 Discharge 47-57 Suction 280-300 Discharge 5-26