Trane 4TWX7060E - Page 18

18 18-BC109D1-1A-EN
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
STEP 2 - Determine the nal 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.
2 Ton Heat Pump
50
1°
40
30
25
Use Design Subcooling
15
10
0
20 30 40 50 60 70 80 90 100 110 120130 140 150
Add 1°
Add 1°
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
Add 2°
REFRIGERANT LINE LIFT (FT)
4 Ton Heat Pump
50
1°
40
1°
30
25
Use Design Subcooling
15
10
0
20 30 40 50 60 70 80 90 100 110 120130 140 150
REFRIGERANT LINE LIFT (FT)
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
Add 4°
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Add 2°
Add 1°
Add 1°
5 Ton Heat Pump
50
1°
40
1°
30
25
Use Design Subcooling
15
10
0
1°
20 30 40 50 60 70 80 90 100110 120130 140 150
Add 4°
Add 2°
Add 1°
Add 1°
REFRIGERANT LINE LIFT (FT)
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
3 Ton Heat Pump
50
4°
40
30
25
Use Design Subcooling
15
1°
10
0
20 30 40 50 60 70 80 90 100 110 120130 140 150
Add 1°
Add 2°
REFRIGERANT LINE LIFT (FT)
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Add 1°