53
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 field-installed nozzles. Consult
AHU
Builder
®
software selection program for correct nozzle selection.
39M UNIT SIZE
42T
50W
51T
CIRCUITING TYPE
Half
Full
Double
Full
Double
Quarter
Half
Full
Double
Airflow (cfm) at 500 fpm
20,938
25,278
25,313
Total Face Area (sq ft)
41.9
50.6
50.6
Tubes in Face
36
36
36
36
36
36
28
28
28
28
—
36
36
36
36
36
36
Tube Length (in.)
67
67
67
67
67
67
104
104
104
104
—
81
81
81
81
81
81
No. of Circuits - Total
18
18
36
36
72
72
28
28
56
56
—
18
18
36
36
72
72
4-Row Coil
Upper
Lower
Upper
Lower
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
—
—
Suction Connections (in. OD)
1-3/8
1-3/8
1-5/8
1-5/8
—
—
1-5/8
1-5/8
—
—
—
1-3/8
1-3/8
1-5/8
1-5/8
—
—
Distributor Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-3/8
—
—
1-3/8
1-3/8
—
—
—
1-1/8
1-1/8
1-3/8
1-3/8
—
—
Distributor Nozzle Size
E-8
E-8
C-17
C-17
—
—
C-15
C-15
—
—
—
E-8
E-8
C-17
C-17
—
—
Intertwined Row Split Coils
No. of TXVs
2
2
2
2
—
—
2
2
—
—
—
2
2
2
2
—
—
Suction Connections (in. OD)
1-3/8
1-3/8
1-5/8
1-5/8
—
—
1-5/8
1-5/8
—
—
—
1-3/8
1-3/8
1-5/8
1-5/8
—
—
Distributor Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-3/8
—
—
1-3/8
1-3/8
—
—
—
1-1/8
1-1/8
1-3/8
1-3/8
—
—
Distributor Nozzle Size
E-8
E-8
C-17
C-17
—
—
C-15
C-15
—
—
—
E-8
E-8
C-17
C-17
—
—
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
—
—
Suction Connections (in. OD)
1-3/8
1-3/8
1-5/8
1-5/8
—
—
1-5/8
1-5/8
—
—
—
1-3/8
1-3/8
1-5/8
1-5/8
—
—
Distributor Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-3/8
—
—
1-3/8
1-3/8
—
—
—
1-1/8
1-1/8
1-3/8
1-3/8
—
—
Distributor Nozzle Size
E-8
E-8
C-17
C-17
—
—
C-15
C-15
—
—
—
E-8
E-8
C-17
C-17
—
—
Intertwined Row Split Coils
No. of TXVs
2
2
2
2
—
—
2
2
—
—
—
2
2
2
2
—
—
Suction Connections (in. OD)
1-3/8
1-3/8
1-5/8
1-5/8
—
—
1-5/8
1-5/8
—
—
—
1-3/8
1-3/8
1-5/8
1-5/8
—
—
Distributor Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-3/8
—
—
1-3/8
1-3/8
—
—
—
1-1/8
1-1/8
1-3/8
1-3/8
—
—
Distributor Nozzle Size
E-8
E-8
C-17
C-17
—
—
C-15
C-15
—
—
—
E-8
E-8
C-17
C-17
—
—
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
4
—
2
2
2
2
4
4
Suction Connections (in. OD)
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
—
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
1-5/8
Distributor Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
—
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-3/8
Distributor Nozzle Size
E-8
E-8
C-17
C-17
C-17
C-17
C-15
C-15
C-15
C-15
—
E-8
E-8
C-17
C-17
C-17
C-17
Intertwined Row Split Coils
No. of TXVs
2
2
2
2
4
4
2
2
4
4
—
2
2
2
2
4
4
Suction Connections (in. OD)
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
1-5/8
—
1-3/8
1-3/8
1-5/8
1-5/8
1-5/8
1-5/8
Distributor Connections (in. OD)
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
1-3/8
—
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-3/8
Distributor Nozzle Size
E-8
E-8
C-17
C-17
C-17
C-17
C-15
C-15
C-15
C-15
—
E-8
E-8
C-17
C-17
C-17
C-17
Single Circuit Coils
No. of TXVs
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Suction Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Connections (in. OD)
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Distributor Nozzle Size
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—