Figure 1. Pressure Testing Setup

TM 9-4120-430-14

0050 00

Compare gauge readings with the normal range of system pressure as shown on the Table of Normal Temperature.

Pressure Relationships.

Disconnect gauges.

Install service valve access cover with screws.

Table 1. Normal Temperature Pressure Relationships

Pressure Range (PSIG)

Temperatures

Outdoor Ambient

50 F (10 C)

75 F (24 C)

100 F (38 C)

120 F (52 C)

Evaporator Intake

90 F (32 C) Air to

55-65 Suction 150-

66-76 Suction 200-

76-86 Suction 280-

95-100 Suction 390-

Unit (Dry Bulb)

180 Discharge

240 Discharge

325 Discharge

428 Discharge

80 F (27 C) Air to

50-60 Suction 140-

61-71 Suction 190-

71-81 Suction 270-

80-90 Suction 360-

Unit (Dry Bulb)

170 Discharge

230 Discharge

315 Discharge

410 Discharge

Figure 1. Pressure Testing Setup

END OF WORK PACKAGE

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