Trane 4TTX8024A Installer's Manual page 19

STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below.
2 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
50
25 ft. Maximum Lift
40
30
25
20
15
10
0 Use design subcooling
10 20
TOTAL REFRIGERANT LINE LENGTH (FT)
4 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
50
25 ft. Maximum Lift
40
30
25
20
15
Add 1º
10
0 Use Design Subcooling
10 20
TOTAL REFRIGERANT LINE LENGTH (FT)
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
STEP 3 - 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.
18-AC95D1-1
o
Add 3
o
Add 2
o
Add 1
25 30 40 60
Add 3º Add 4º
Add 2º Add 3º
Add 2º
25 30 40 60
3 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
50
25 ft. Maximum Lift
40
30
25
20
15
o
10 Add 1
0 Use design subcooling
10 20 25
TOTAL REFRIGERANT LINE LENGTH (FT)
5 Ton Unit
SUBCOOL CHARGING CHART CORRECTIONS TABLE
60
50
25 ft. Maximum Lift
40
30
25
20
15
Add 1º
10
0 Use Design Subcooling
10 20 25
TOTAL REFRIGERANT LINE LENGTH (FT)
20 MIN.
o
Add 3
o
Add 2
o
Add 1
30 40 60
Add 4º
Add 3º
Add 2º
Add 2º
30 40 60
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