Table 20 — Direct Expansion Coil Circuiting Data
LARGE FACE AREA COILS
39T UNIT SIZE 07 09 11 13
CIRCUITING TYPE Quarter Half Full Half Full Half Full Double Half Full Double
Airflow (cfm) at 550 fpm 3688 4921 5748 7173
Total Face Area (sq ft) 6.7 8.9 10.5 13.0
Tubes in Face 18 22 22 24
Tube Length (in.) 42
15
⁄
16
46
7
⁄
8
54
3
⁄
4
62
5
⁄
8
No. of Circuits — Total 4 9 18 11 22 11 22 44 12 24 48
4-Row Coil
Circuit Equivalent Length (in.) 89.9 39.1 24.8 41.7 26.1 47.0 28.7 — 52.2 31.4 —
Face-Split Coils
No. of TXVs 2 222222 — 22 —
No. of Circuits/Distributor* 2 4,5 9 5,6 11 5,6 11 — 6 12 —
Suction Connections (in. OD)
7
⁄
8
1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
—1
1
⁄
8
1
3
⁄
8
—
Distributor Connections (in. OD)
7
⁄
8
7
⁄
8
1
1
⁄
8
7
⁄
8
1
3
⁄
8
7
⁄
8
1
3
⁄
8
—
7
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) 11 16 15 21 18 21 18 — 21 18 —
Distributor Nozzle Size† 4 445566 — 88 —
Row-Split Coils
No. of TXVs 2 222222 — 22 —
No. of Circuits/Distributor* 2 4,5 9 5,6 11 5,6 11 — 6 12 —
Suction Connections (in. OD)
7
⁄
8
1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
—1
1
⁄
8
1
3
⁄
8
—
Distributor Connections (in. OD)
7
⁄
8
7
⁄
8
1
1
⁄
8
7
⁄
8
1
3
⁄
8
7
⁄
8
1
3
⁄
8
—
7
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) 11 16 15 21 18 21 18 — 21 18 —
Distributor Nozzle Size† 4 445566 — 88 —
6-Row Coil
Circuit Equivalent Length (in.) — 59.4 29.0 63.4 30.9 71.2 34.9 — 79.1 38.8 —
Face-Split Coils
No. of TXVs — 222222 — 22 —
No. of Circuits/Distributor* — 4,5 9 5,6 11 5,6 11 — 6 12 —
Suction Connections (in. OD) —1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
—1
1
⁄
8
1
3
⁄
8
—
Distributor Connections (in. OD) —
7
⁄
8
1
1
⁄
8
7
⁄
8
1
3
⁄
8
7
⁄
8
1
3
⁄
8
—
7
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) — 161521182118 — 2118 —
Distributor Nozzle Size† — 445566 — 88 —
Row-Split Coils
No. of TXVs — 222222 — 22 —
No. of Circuits/Distributor* — 4,5 9 5,6 11 5,6 11 — 6 12 —
Suction Connections (in. OD) —1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
—1
1
⁄
8
1
3
⁄
8
—
Distributor Connections (in. OD) —
7
⁄
8
1
1
⁄
8
7
⁄
8
1
3
⁄
8
7
⁄
8
1
3
⁄
8
—
7
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) — 161521182118 — 2118 —
Distributor Nozzle Size† — 445566 — 88 —
8-Row Coil
Circuit Equivalent Length (in.) — 79.7 39.1 85.0 41.7 — 47.0 22.7 — 52.2 25.4
Face-Split Coils
No. of TXVs — 2222—2 4 —2 4
No. of Circuits/Distributor* — 4,5 9 5,6 11 — 11 11 — 12 12
Suction Connections (in. OD) —1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
Distributor Connections (in. OD) —
7
⁄
8
1
1
⁄
8
7
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
Distributor Tube Length (in.) — 16151518—18 13 —18 13
Distributor Nozzle Size† — 4455—6 3 —8 4
Row-Split Coils
No. of TXVs — 2222—2 4 —2 4
No. of Circuits/Distributor* — 4,5 9 5,6 11 — 11 11 — 12 12
Suction Connections (in. OD) —1
1
⁄
8
1
3
⁄
8
1
1
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
Distributor Connections (in. OD) —
7
⁄
8
1
1
⁄
8
7
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
—1
3
⁄
8
1
3
⁄
8
Distributor Tube Length (in.) — 16151518—18 13 —18 13
Distributor Nozzle Size† — 4455—6 3 —8 4
LEGEND
TXV — Thermostatic Expansion Valve (Field-Supplied)
*Where each distributor has the same number of circuits, that number is shown once. When a coil has
an uneven number of circuits per distributor, both values are shown. For example, the upper coil of a
half-circuit size 32 large face area coil has 5 circuits on one distributor and 6 circuits on the other
distributor; the lower coil has 6 circuits on each distributor.
†Factory-supplied distributors have factory-selected nozzle sizes shown. If necessary, replace factory-
supplied nozzles with field-supplied and installed nozzles. Consult Electronic Catalog
AHU Builder™
program for correct nozzle selection.
51
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