Trane 4TTR4018-060 - System Charge Adjustment; Temperature Measurements for Charging; Subcooling Charging Method

18-AC51D1-10E-EN 17
STEP 1 - Check the outdoor temperatures.
Subcooling (in cooling mode) is the only recom-
mended method of charging above 55º F ambi-
ent outdoor temperature.
Note: For Superheat (In Cooling Mode), refer to
the Superheat Charging Table
For best results the indoor temperature should
be kept between 70º F to 80º F.
Note: It is important to return in the spring or
summer to accurately charge the system in the
cooling mode when outdoor ambient tempera-
ture is above 55º F.
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5 and use
line length adders as shown in Section 5.2 if
required.
Total Line Length = __________ Ft.
Vertical Change (Lift) = __________ Ft.
Section 14. System Charge Adjustment
14.1 Temperature Measurements (Systems can be rated with TXV, EEV or Piston. Ensure charging method
is correct).
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
Indoor Temp
80º F
70º F
Outdoor Temp
55º F
120º F
LIFT