Trane 4TTR5018E - Page 19

18-AC76D1-5 19
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below.
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.
20 MIN.
018 and 024 Units
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 1° of Subcooling
Add 4° of
Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
030 Units
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 2° of Subcooling
Add 4° of Subcooling
Add 6° of
Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
036 Units
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 2° of Subcooling
Add 4° of
Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
042 Units
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 2° of Subcooling
Add 4° of Subcooling
Add 5° of
Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
048 Units
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 6080
Add 2° of Subcooling
Add 4°
Add 6° of
Subcooling
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
049 Units
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 6°
Add 5°
Add 4°
Add 3°
Add 2°
Add 2°
Add 1°
Add 3°
Use Design Subcool Value
60
50
40
30
25
20
15
10
0
060 Units
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FEET)
REFRIGERANT LINE LIFT (FEET)
10 20 25 30 40 60
Add 2° of Subcooling
Add 5°
Use Design Subcool Value
60
50
40
30
25
20
15
10
0