Trane 4TWR4 Installation And Operation Manual page 13

14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5.3.
Total Line Length = __________ Ft.
Vertical Change (Lift) = __________ Ft.
STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below.
For 017N - 060N Models:
017N Models
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
Add 1°
50
40
30
25 Use Design Subcooling
15
10
0
20 30 40 50 60 70 80
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
024N Models
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)
036N Models
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)
048N Models
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
TOTAL REFRIGERANT LINE LENGTH (FEET)
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
18-BC95D1-5E-EN
4°
Add 1° Add 2°
1°
1°
Add 1°
90 100 110 120 130 140 150
Add 4°
Add 2°
Add 1° of Subcooling
Use Design Subcool Value
25 30 40 60
Add 5°
Add 4°
Add 3° of Subcooling
Add 2°
Add 1° of Subcooling
25 30 40 60
Add 6°
Add 4° of Subcooling
Add 3° of Subcooling
Add 2° of Subcooling
25 30 40 60
018N Models
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)
030N Models
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)
042N Models
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
60
50
40
30
25
Add 1° of Subcooling
20
15
Use Design Subcool Value
10
0
10 20 25
TOTAL REFRIGERANT LINE LENGTH (FEET)
060N Models
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 25
TOTAL REFRIGERANT LINE LENGTH (FEET)
LIFT
Add 3°
Add 2°
Add 1° of Subcooling
30 40 60
Add 4°
Add 3°
Add 2° of Subcooling
Add 1° of Subcooling
30 40 60
Add 6°
Add 5°
Add 3° of Subcooling
Add 2° of Subcooling
30 40 60
Add 6°
Add 5° of Subcooling
Add 4° of Subcooling
Add 3° of Subcooling
30 40 60
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