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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 Heat Pump
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
50
40
30
25
Use Design Subcooling
15
10
0
20
30
40
50
60
70
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
2 1/2 Ton Heat Pump
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
50
40
30
25
Use Design Subcooling
15
10
0
20
30
40
50
60
70
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
3 1/2 Ton Heat Pump
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
50
40
30
25
Use Design Subcooling
15
10
0
20
30
40
50
60
70
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
5 Ton Heat Pump
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
50
40
30
25
Use Design Subcooling
15
10
0
20
30
40
50
60
70
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
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
Add 1°
4°
Add 1°
Add 2°
1°
1°
Add 1°
80
90 100 110 120 130 140 150
1°
Add 2°
Add 1°
Add 1°
1°
80
90 100 110 120 130 140 150
Add 4°
Add 1°
Add 2°
Add 1°
Add 1°
80
90 100 110 120 130 140 150
Add 4°
1°
1°
Add 2°
Add 1°
Add 1°
1°
80
90 100 110 120 130 140 150
2 Ton Heat Pump
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
1°
50
40
30
25
Use Design Subcooling
15
10
0
20
30
40
50
60
70
80
90 100 110 120 130 140 150
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
3 Ton Heat Pump
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
50
Add 1°
40
30
25
Use Design Subcooling
15
10
0
20
30
40
50
60
70
80
90 100 110 120 130 140 150
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
4 Ton Heat Pump
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
1°
50
1°
40
Add 1°
30
25
Use Design Subcooling
15
10
0
20
30
40
50
60
70
80
90 100 110 120 130 140 150
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Subcooling Correction = __________º F
Final Subcooling Value = __________º F
20 MIN.
Add 2°
Add 1°
Add 1°
4°
Add 2°
Add 1°
1°
Add 4°
Add 2°
Add 1°
88-A4HP4001-1F-EN
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