Section 14. System Charge Adjustment (Systems Can Be Rated With Txv, Eev Or Piston) - Trane A4AC6036B1000A Installation And Operation Manual

Section 14. System Charge Adjustment
NOTE: For systems using a indoor piston metering device, refer to the Superheat charging method and chart.
For systems using a TXV or EEV indoor metering device, refer to Subcool charging method and charts.
14.1 Temperature Measurements
STEP 1 - Check the outdoor temperatures.
Subcooling (in cooling mode) is the only recom-
mended method of charging above 55º F ambient
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 temperature
is above 55º F.
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
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.
Note: Use this method when matched with a
TXV or EEV indoor unit.
88-A4AC6001-1F-EN
(Systems can be rated with TXV, EEV or Piston)
120º F
55º F
Outdoor Temp
80º F
70º F
Indoor Temp
LIFT
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