Trane 4TTV7X48A1000A - System Charge Adjustment

18-BC111D1-1A-EN
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System Charge Adjustment
Table 28. Temperature Measurements
Check the outdoor temperatures.
Subcooling using “Charging Mode-Cooling” is the only
recommended method of charging between 55 ° F and 120° F ambient
outdoor temperature.
120° F
55° F
For best results the indoor temperature should be kept between 70° F
to 80° F.
80° F
70° F
Table 29. Subcooling Charging Corrections
Determine the final subcooling value using total Line Length and Lift
measured in “Required Refrigerant Line Length” and the “Subcooling
Charging Corrections Charts.”
Subcooling Charging Correction Worksheet
Total Line Length (ft) ________________________
Total Vertical Charge (lift) ________________________
(Values from — Required Refrigerant Line Length)
Design Subcooling Value ________________________
(from nameplate or Service Facts)
Final Subcooling Value ________________________
Note: The only mode approved for setting or validating system charge is using Charging Mode-Cooling. Charging Mode-Cooling is a variable
speed test mode found in the UX360 comfort control Technician Menu’s. Test modes can also be accessed using the Diagnostic Mobile
App on Link systems. Outdoor Temperature must be between 55°F and 120°F with Indoor Temperature kept between 70°F and 80°F.