Trane 4TTR3018–060 Installer's Manual page 16

STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below.
1 1/2 Ton
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
20
15
10
0
10 20
TOTAL REFRIGERANT LINE LENGTH (FEET)
2 1/2 Ton
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
20
15
10
0
10 20
TOTAL REFRIGERANT LINE LENGTH (FEET)
3 1/2 Ton
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
20
15
Use Design Subcool Value
10
0
10 20
TOTAL REFRIGERANT LINE LENGTH (FEET)
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
20
Add 2° of Subcooling
15
10
Design Add 1° of Subcooling
0
10 20
TOTAL REFRIGERANT LINE LENGTH (FEET)
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.
16
Add 3°
Add 2°
Add 1° of Subcooling
Use Design Subcool Value
25 30 40 60
Add 4°
Add 3°
Add 2° of Subcooling
Add 1° of Subcooling
Use Design Subcool Value
25 30 40 60
Add 6°
Add 5°
Add 3° of Subcooling
Add 2° of Subcooling
Add 1° of Subcooling
25 30 40 60
5 Ton
Add 6°
Add 5° of Subcooling
Add 4° of Subcooling
Add 3° of Subcooling
25 30 40 60
2 Ton
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
20
Use Design Subcool Value
15
10
0
10 20 25
TOTAL REFRIGERANT LINE LENGTH (FEET)
3 Ton
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
20
15
Use Design Subcool Value
10
0
10 20 25
TOTAL REFRIGERANT LINE LENGTH (FEET)
4 Ton
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
20
Add 1° of Subcooling
15
10
Use Design Subcool Value
0
10 20 25
TOTAL REFRIGERANT LINE LENGTH (FEET)
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
20 MIN.
Add 4°
Add 2°
Add 1° of Subcooling
30 40 60
Add 5°
Add 4°
Add 3° of Subcooling
Add 2°
Add 1° of Subcooling
30 40 60
Add 6°
Add 4° of Subcooling
Add 3° of Subcooling
Add 2° of Subcooling
30 40 60
18-AC79D1-6-EN