Daikin Maverick I Installation And Maintenance Manual page 47

Figure 39: System Charging Chart: MPS 020B
Daikin IM 972-1
SYSTEM CHARGE CHAR
20 TON, CIRCUITS 1 & 2
CAUTION: BOTH COMPRESSORS MUST BE OPERATING BEFORE CHECKING
REFRIGERANT CHARGE.
RETURN AIR TEMPERATURE MUST BE WITHIN COMFORT CONDITIONS
BEFORE FINAL REFRIGERANT CHECK!
MEASURE PRESSURE AT COMPRESSOR SUCTION AND DISCHARGE.
INSTRUCTIONS:
MEASURE OUTDOOR AMBIENT TO UNIT.
PLACE (X) ON CHART WHERE SUCTION AND DISCHARGE INTERSECT.
IF (X) IS BELOW OUTDOOR AMBIENT LINE, ADD CHARGE AND REPEAT
STEPS 1-3.
IF (X) IS ABOVE OUTDOOR AMBIENT LINE, RECOVER EXCESS CHARGE
AND REPEAT STEPS 1-3.
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
100 105 110 115
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
100 105 110 115 120
SUCTION PRESSURE (PSIG)
T - REFRIGERANT 410A
120 125 130 135 140 145 150
SUCTION PRESSURE (PSIG)
20 TON, CIRCUIT 1
125 130 135 140 145 150
20 TON, CIRCUIT 2
Maintenance
115
105
95
85
75
65
55
155 160 165
115
105
95
85
75
65
55
155 160 165
47