50
Table 11 —
Direct-Expansion Circuiting Data (cont)
Large Face Area Coils (cont)
LEGEND
TXV —
Thermostatic Expansion Valve (Field Supplied)
*When 2 nozzle sizes are listed, the smaller nozzle should be located on the upper distributor.
NOTE: Factory-supplied distributors have factory-selected nozzle sizes as shown. If necessary,
replace factory-supplied nozzles with field-supplied and installed nozzles. Consult
AHU
Builder
®
software selection program for correct nozzle selection.
39M UNIT SIZE
18T
21W
22T
25W
CIRCUITING TYPE
Half
Full
Double
Half
Full
Double
Half
Full
Double
Half
Full
Double
Airflow (cfm) at 500 fpm
8,898
10,720
11,016
12,205
Total Face Area (sq ft)
17.8
21.4
22.0
24.4
Tubes in Face
24
26
24
26
24
26
38
38
38
26
28
26
28
26
28
38
38
38
Tube Length (in.)
41
41
41
41
41
41
65
65
65
47
47
47
47
47
47
72
72
72
No. of Circuits - Total
12
13
24
26
48
52
19
38
76
13
14
26
28
52
56
19
38
76
4-Row Coil
Upper
Lower
Upper
Lower
Upper
Lower
Upper
Lower
Upper
Lower
Upper
Lower
Face Split Coils
No. of TXVs
2
2
2
2
—
—
2
2
—
2
2
2
2
—
—
2
2
—
Suction Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-5/8
—
—
1-3/8
1-5/8
—
1-1/8
1-1/8
1-5/8
1-5/8
—
—
1-3/8
1-5/8
—
Distributor Connections (in. OD)
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
Distributor Nozzle Size
G-4
G-6/G-4
C-12
C-12
—
—
E-10/E-8 C-20
—
G-6/G-4
G-6
C-12
C-15
—
—
E-10/E-8 C-20
—
Intertwined Row Split Coils
No. of TXVs
2
2
2
2
—
—
2
2
—
2
2
2
2
—
—
2
2
—
Suction Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-5/8
—
—
1-3/8
1-5/8
—
1-1/8
1-1/8
1-5/8
1-5/8
—
—
1-3/8
1-5/8
—
Distributor Connections (in. OD)
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
Distributor Nozzle Size
G-4
G-6/G-4
C-12
C-12
—
—
E-10/E-8 C-20
—
G-6/G-4
G-6
C-12
C-15
—
—
E-10/E-8 C-20
—
Single Circuit Coils
No. of TXVs
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Suction Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Nozzle Size
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
6-Row Coil
Face Split Coils
No. of TXVs
2
2
2
2
—
—
2
2
—
2
2
2
2
—
—
2
2
—
Suction Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-5/8
—
—
1-3/8
1-5/8
—
1-1/8
1-1/8
1-5/8
1-5/8
—
—
1-3/8
1-5/8
—
Distributor Connections (in. OD)
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
Distributor Nozzle Size
G-4
G-6/G-4
C-12
C-12
—
—
E-10/E-8 C-20
—
G-6/G-4
G-6
C-12
C-15
—
—
E-10/E-8 C-20
—
Intertwined Row Split Coils
No. of TXVs
2
2
2
2
—
—
2
2
—
2
2
2
2
—
—
2
2
—
Suction Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-5/8
—
—
1-3/8
1-5/8
—
1-1/8
1-1/8
1-5/8
1-5/8
—
—
1-3/8
1-5/8
—
Distributor Connections (in. OD)
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
7/8
7/8
1-3/8
1-3/8
—
—
1-1/8
1-3/8
—
Distributor Nozzle Size
G-4
G-6/G-4
C-12
C-12
—
—
E-10/E-8 C-20
—
G-6/G-4
G-6
C-12
C-15
—
—
E-10/E-8 C-20
—
Single Circuit Coils
No. of TXVs
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Suction Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Nozzle Size
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
8-Row Coil
Face Split Coils
No. of TXVs
2
2
2
2
4
4
2
2
4
2
2
2
2
4
4
2
2
4
Suction Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-5/8
1-3/8
1-5/8
1-3/8
1-5/8
1-5/8
1-1/8
1-1/8
1-5/8
1-5/8
1-5/8
1-5/8
1-3/8
1-5/8
1-5/8
Distributor Connections (in. OD)
7/8
7/8
1-3/8
1-3/8
1-3/8
1-3/8
1-1/8
1-3/8
1-3/8
7/8
7/8
1-3/8
1-3/8
1-3/8
1-3/8
1-1/8
1-3/8
1-3/8
Distributor Nozzle Size
G-4
G-6/G-4 C-12
C-12
C-12
C-12 E-10/E-8 C-20
C-20 G-6/G-4
G-6
C-12
C-15
C-12
C-15 E-10/E-8 C-20
C-20
Intertwined Row Split Coils
No. of TXVs
2
2
2
2
4
4
2
2
4
2
2
2
2
4
4
2
2
4
Suction Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-5/8
1-3/8
1-5/8
1-3/8
1-5/8
1-5/8
1-1/8
1-1/8
1-5/8
1-5/8
1-5/8
1-5/8
1-3/8
1-5/8
1-5/8
Distributor Connections (in. OD)
7/8
7/8
1-3/8
1-3/8
1-3/8
1-3/8
1-1/8
1-3/8
1-3/8
7/8
7/8
1-3/8
1-3/8
1-3/8
1-3/8
1-1/8
1-3/8
1-3/8
Distributor Nozzle Size
G-4
G-6/G-4 C-12
C-12
C-12
C-12 E-10/E-8 C-20
C-20 G-6/G-4
G-6
C-12
C-15
C-12
C-15 E-10/E-8 C-20
C-20
Single Circuit Coils
No. of TXVs
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Suction Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Nozzle Size
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—