System information

18-BC53D2-6 19
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. See Section 14.2.
For outdoor temperatures below 55º F, follow
the Superheat charging instructions (in heating
mode). See Section 14.6.
NOTE: It is important to return in the spring or
summer to accurately charge the system in the
cooling mode with outdoor ambient temperature
below 55ºF.
For best results the indoor temperature should
be kept between 70º F to 80º F.
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5.3.
Total Line Length = __________ Ft.
Vertical Change (Lift) = __________ Ft.
Section 14. System Charge Adjustment
14.1 Temperature Measurements
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
LIFT
Indoor Temp
80º F
70º F
Outdoor Temp 1
55º F
120º F
Outdoor Temp 2
See Section 14.6 for
Outdoor
Temperatures
Below 55º F
See Section 14.2 for
Outdoor
Temperatures
Above 55º F
55º F