Emerson Liebert CRV - Page 58

Refrigerant Connections for Air-Cooled Units
Liebert
®
CRV
™
48
Subtract Line 6 (Measured Line Temperature) from Line 5 (Liquid Pressure converted to
Temperature) to obtain Calculated Subcooling.
Elevation Correction
Subtract Line 3 (Correction for Condenser Elevation above Evaporator) from Line 8 (Calculated
Subcooling) to obtain Corrected Subcooling.
Verification Against MC Condenser
Subtract Line 7 (MC Condenser Subcooling Reading) from Line 9 (Corrected Subcooling) to obtain
Difference.
• If Line 10 (Difference value) is less than ± 3°F, NO charge adjustment is needed.
• If Line 10 (Difference value) is greater than -3°F, add additional charge.
• If Line 10 (Difference value) is greater than +3°F, remove charge.
Circuit 1
Line 5
Line 6
8. Calculated Subcooling
Circuit 1
Line 8
Line 3
9. Corrected Subcooling
Circuit 1
Line 9
Line 7
10. Difference