| 400 |
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| 380 |
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| 360 |
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(psig) | 340 | Remove refrigerant when above curve |
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320 |
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Pressure | 300 |
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280 |
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260 |
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240 |
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Liquid |
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220 |
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200 |
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| Add refrigerant when below curve |
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| 180 |
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| 160 |
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| 140 |
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| 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 135 |
Liquid Temperature (F)
Figure 7. Charging Chart for 3 Ton Units (with Microchannel Coil)
Liquid Pressure (psig)
400
380 
360 
340 
Remove refrigerant when above curve
320
300
280
260
240
220
200
Add refrigerant when below curve 
180
160
140
75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 135 |
Liquid Temperature (F)
Figure 8. Charging Chart for 3.5 Ton Units
11