7-5. DX COIL Guideline H/P
- Guideline H/P -
< TA type >
No. of refrigerant circuit by Dx-coil copper tube dia. and Dx-coil size (Ton)
Copper tube diameter
Dx-coil capacity
0.6 Ton
0.8 Ton
1 Ton
1.25 Ton
1.5 Ton
2 Ton
2.25 Ton
2.5 Ton
3 Ton
4 Ton
4.5 Ton
5 Ton
6 Ton
8 Ton
10 Ton
12 Ton
14 Ton
16 Ton
20 Ton
24 Ton
28 Ton
32 Ton
Ton
Std.
AHU Air flow rate
Min.
(cfm)
Max.
Min.
Dx-coil internal
volume (inch³)
Max.
Copper tube dia. (inch)
Capacity (kBtu/h)
Coil on Air temp.
Evaporating temp.
Superheat
Air Suction temp.
(Design temp.)
Capacity (kBtu/h)
Coil on Air temp.
Evaporating temp.
Superheat
Air Suction temp.
(Design temp.)
Number of Circuits
5/16"
3/8"
Min
Max
Min
2
3
2
2
3
2
2
3
2
3
4
2
3
4
2
3
4
2
4
6
3
4
6
3
5
8
3
6
8
4
6
8
4
6
8
4
8
12
6
10
14
8
16
22
12
16
24
12
18
24
14
20
26
16
24
32
18
30
40
22
34
46
26
40
54
30
0.6
0.8
1
250
300
350
200
240
280
300
360
420
18
26
34
30
38
46
Ø1/2", Ø3/8", Ø5/16" (Recommended Ø3/8" or less)
7
9
12
8.5
10.5
13.5
– 28 –
1/2"
Max
Min
Max
2
2
2
2
2
2
2
2
2
3
2
2
3
2
2
3
2
2
4
2
2
4
2
2
5
2
3
6
3
3
6
3
4
6
3
4
10
4
6
12
5
7
16
8
10
18
8
10
18
8
10
20
10
12
28
12
14
34
14
18
36
16
20
38
18
22
1.25
1.5
2
450
550
650
360
440
520
540
660
780
43
51
68
58
69
92
15
18
24
59 - 75°F WB (64 - 90°F DB)
44°F
12R
80°F DB / 67°F WB
17
20
27
54 - 82°F DB
126°F
8R
68°F DB
2.25
2.5
3
750
800
950
600
640
760
900
960
1140
77
85
102
104
115
138
27
30
36
30
34
40