Fig. 50 — Charging Chart — 48/50A025 and 027 with R-410A Refrigerant
LEGEND
MCHX— Microchannel Heat Exchanger
SST — Saturated Suction Temperature
25 and 27 Ton MCHX CIRCUIT A Charging Chart
All Co mp re ssors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
55 60 65 70 75 80 85 90 95 100 105 110 115 120 125
Outdoor Air Temperature (deg F)
Saturated Condensing Temperature (deg F)
Reduce Charge if Above Curve
Add Charge if Below Curve
SST= 4 5 F
SST= 5 5 F
SST= 3 5 F
25 and 27 Ton MCHX CIRCUIT B Charging Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
55 60 65 70 75 80 85 90 95 100 105 110 115 120 125
Outdoor Air Temperature (deg F)
Saturated Condensing Temperature (deg F)
Reduce Charge if Above Curve
Add Charge if Below Curve
SST= 45 F
SST= 55 F
SST= 3 5 F
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