ComfortStar 18 Installation Manual page 17

Design superheat with TXV throttle
Outdoor DB (°F)
95/79
115 13
110 13
105
12
100 11
95 11
90
11
85 12
80 13
75
14
70 10
65 7
60
6
55 6
Design superheat with piston throttle
Outdoor DB (°F)
95/79
115 16
110
18
105 20
100 23
95
25
90 27
85 29
80
25
75 22
70
22
65
21
60 20
55
19
Determine the final superheat value using total Line Length and Lift measured in 5.3 and the charts below
60
50
45
40
35
30
25
20
15
10
0
Indoor Unit Inlet DB/WB (°F)
90/75 85/71
12 11
11 10
11 10
10 10
10 10
10 10
10 9
11 9
12 9
9 8
6 6
5 5
5 5
Indoor Unit Inlet DB/WB (°F)
90/75 85/71
11 6
13 8
15 10
17 13
20 15
22 17
24 19
20 16
18 14
18 13
17 13
16 12
15 11
18K AC with TXV
Use Design Superheat Value
15 25 40
Total Refrigerant Line Length-feet
14
80/67 75/63
11 10
10 10
10 9
10 9
9 8
9 8
9 8
9 8
8 7
6 5
6 5
5 5
5 5
80/67 75/63
5 5
5 5
5 5
7 5
9 5
12 5
14 8
11 7
9 5
8 5
8 5
7 5
5 5
Add 2° of Superheat
Add 4° of Superheat
Add 2° of Superheat
50 60 75
70/58
9
9
8
8
8
8
8
8
5
5
5
5
5
70/58
5
5
5
5
5
5
5
5
5
5
5
5
5
100