Figure 18: 7-1/2 Ton Charging Chart
525
500
475
450
425
400
375
350
325
300
275
250
225
200
100.0
105.0
CAUTION: RETURN AIR TEMPERATURE MUST BE WITHIN COMFORT CONDITIONS BEFORE FINAL REFRIGERANT CHECK!
INSTRUCTIONS: 1. MEASURE PRESSURE AT COMPRESSOR SUCTION AND LIQUID.
2. MEASURE OUTDOOR AMBIENT TO UNIT.
3. PLACE AN "X" ON THE CHART WHERE THE SUCTION AND LIQUID INTERSECT.
4. IF "X" IS BELOW OUTDOOR AMBIENT TEMPERATURE LINE, ADD CHARGE AND REPEAT STEPS 1-3.
5. IF "X" IS ABOVE AMBIENT TEMPERATURE LINE, RECOVER EXCESS CHARGE AND REPEAT STEPS 1-3.
IM 962-4 • AIR-COOLED SPLIT SYSTEM CONDENSERS
A/C SYSTEM CHARGE CHART
110.0
115.0
120.0
125.0
VAPOR PRESSURE (PSIG)
130.0
135.0
140.0
145.0
22
Charging Charts
115
105
95
85
75
65
55
150.0
155.0
160.0
165.0
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