Daikin MPS025B - Maintenance - System Charge Charts (MPS 025 B); MPS 025 B Refrigerant Charging Charts

IM 972-2 • MAVERICK I ROOFTOP SYSTEMS 46 www.DaikinApplied.com
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Figure 39: System Charging Chart: MPS 025B
25 TON, CIRCUITS 1 & 2
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25 TON, CIRCUIT 1
25 TON, CIRCUIT 2
BOTH COMPRESSORS MUST BE OPERA
TING BEFORE CHECKING
REFRIGERANT CHARGE.
BEFORE FINAL REFRIGERANT CHECK!
RETURN AIR TEMPERATURE MUST BE WITHIN COMFORT
CONDITIONS
MEASURE PRESSURE AT C
OMPRESSOR SUCTION AND DISCHARGE.
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 EX
CESS CHARGE
AND REPEAT STEPS 1-3.
CAUTION:
INSTRUCTIONS:
DISCHARGE PRESSURE (PSIG)
OUTDOOR AMBIENT ( F, DB)
SUCTION PRESSURE (PSIG)
DISCHARGE PRESSURE (PSIG)
OUTDOOR AMBIENT ( F, DB)
SUCTION PRESSURE (PSIG)
SYSTEM CHARGE CHART - REFRIGERANT 410A