88-A4AC6001-1F-EN
17
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.
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.
Section 14. System Charge Adjustment
(Systems can be rated with TXV, EEV or Piston)
14.1 Temperature Measurements
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
Indoor Temp
80º F
70º F
Outdoor Temp
55º F
120º F
LIFT
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.
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