Trane 4TTZ0 Installer's Manual page 22

14.5 Manual Charging Procedure in Cooling between 55°F and 120°F OD Ambient
NOTE: Outdoor Temperature (ODT) must be
between 55°F and 120°F. See Section 14.1
IMPORTANT: Be sure to set Dip Switches on
the Outdoor Control Board for Line Length and
Lift. Use the corresponding charge chart and
dip switch column in Section 14.2 to determine
desired liquid pressure when using the manual
charging procedure.
STEP 1 - Stabilize the system by operating for a
minimum of 20 minutes.
At startup, or whenever charge is removed or
added, the system must be operated for a mini-
mum of 20 minutes to stabilize before accurate
measurements can be made.
STEP 2 - Measure the liquid line temperature
and pressure at the outdoor unit's service valve.
Measured Liquid Line Temp = __________ º F
Liquid Gage Pressure = __________ PSIG
Dip Switch setting from 14.2 Step 2 __________
22
20 MIN.
18-BC53D2-6
107 °F