Table 6-1. Normal Operating Pressures

TM 5-4120-352-14

Table 6-1. Normal Operating Pressures

Outdoor Ambient Temperature

100F (38C)

120F (49C)

75F (24C)

50F (10C)

At 90F (32C) DB return air to unit

75-90 psi

60-75 psi

58-66 psi

58-70 psi

Suction

(515-620 kPa)

(255-295 kPa)

Pressure

(400-450 kPa)

(400-485 kPa)

370-410 psi

255.295 psi

175-210 psi

125-160 psi

Discharge

(1750-2025 kPa)

(1200-1460 kPa)

(2550-2825 kPa)

Pressure

(860-1100 kPa)

At 80F (27C) DB return air to unit

65-75 psi

60-75 psi

58-65 psi

58-70 psi

Suction

(450-515 kPa)

(400-485 kPa)

(415-515 kPa)

Pressure

(400-450 kPa)

250-290 psi

370-410 psi

Discharge

120-155 psi

170-205 psi

(2550-2825 kPa)

(1725-2000 kPa)

Pressure

(825-1070 kPa)

(1170-1415 kPa)

c. Charging the System. Refer to figure 6-2 for

i n s t r u c t i o n s on charging the system with

refrigerant.

6-3