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15
Cooling Charging Charts (continued)
Figure 6. Charging Chart for 4 Ton Units
Li
q
uid Tem
p
erature
(
° F
)
Liquid Pressure (psig)
250
275
300
325
350
375
400
425
450
475
500
70 75 80 85 90 95 100 105 110 115 120 12
5
Remove refrigerant when above curve
Add refrigerant when below curve
Figure 7. Charging Chart for 5 Ton Units
Liquid Temperature (° F)
Liquid Pressure (psig)
250
275
300
325
350
375
400
425
450
475
500
70 75 80 85 90 95 100 105 110 115 120 125
Remove refrigerant when above curve
Add refrigerant when below curve