Table 20 — Direct Expansion Coil Circuiting Data (cont)
MEDIUM FACE AREA COILS (cont)
39T UNIT SIZE 32 39 49
CIRCUITING TYPE Half Full Double Half Full Double Half Full Double
Airflow (cfm) at 550 fpm 14,785 17,067 21,255
Total Face Area (sq ft) 26.9 31.0 38.7
Tubes in Face (Upper/Lower) 38 40 44
Tube Length (in.) 81
1
⁄
2
89
3
⁄
8
101
3
⁄
16
No. of Circuits — Total 19 38 76 20 40 80 22 44 88
4-Row Coil
Circuit Equivalent Length (in.) 64.8 37.7 — 70.1 40.3 — 78 44.2 —
Face-Split Coils
No. of TXVs 24 — 2 4 — 2 4 —
No. of Circuits/Distributor* 9,10 9,10 — 10 10 — 11 11 —
Suction Connections (in. OD) 1
3
⁄
8
1
5
⁄
8
—1
3
⁄
8
1
5
⁄
8
—1
3
⁄
8
1
5
⁄
8
—
Distributor Connections (in. OD) 1
1
⁄
8
1
1
⁄
8
—1
1
⁄
8
1
1
⁄
8
—1
3
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) 21 18 — 21 18 — 21 21 —
Distributor Nozzle Size† 158—178—2012—
Row-Split Coils
No. of TXVs 24 — 4 4 — 4 4 —
No. of Circuits/Distributor* 9,10 9,10 — 5 10 — 5,6 11 —
Suction Connections (in. OD) 1
3
⁄
8
1
5
⁄
8
—1
1
⁄
8
1
5
⁄
8
—1
1
⁄
8
1
5
⁄
8
—
Distributor Connections (in. OD) 1
1
⁄
8
1
1
⁄
8
—
7
⁄
8
1
3
⁄
8
—
7
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) 28 18 — 16 18 — 16 21 —
Distributor Nozzle Size† 15 8 — 8 8 — 12 12 —
6-Row Coil
Circuit Equivalent Length 98 48.3 — 105.9 52.2 — 117.7 58.1 —
Face-Split Coils
No. of TXVs 24 — 2 4 — 2 4 —
No. of Circuits/Distributor* 9,10 9,10 — 10 10 — 11 11 —
Suction Connections (in. OD) 1
3
⁄
8
1
5
⁄
8
—1
3
⁄
8
1
5
⁄
8
—1
3
⁄
8
1
5
⁄
8
—
Distributor Connections (in. OD) 1
1
⁄
8
1
1
⁄
8
—1
1
⁄
8
1
1
⁄
8
—1
3
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) 21 18 — 21 18 — 21 21 —
Distributor Nozzle Size† 158—178—2012—
Row-Split Coils
No. of TXVs 24 — 4 4 — 4 4 —
No. of Circuits/Distributor* 9,10 9,10 — 5 10 — 5,6 11 —
Suction Connections (in. OD) 1
3
⁄
8
1
5
⁄
8
—1
1
⁄
8
1
5
⁄
8
—1
1
⁄
8
1
5
⁄
8
—
Distributor Connections (in. OD) 1
1
⁄
8
1
1
⁄
8
—
7
⁄
8
1
3
⁄
8
—
7
⁄
8
1
3
⁄
8
—
Distributor Tube Length (in.) 28 18 — 16 18 — 16 21 —
Distributor Nozzle Size† 15 8 — 8 8 — 12 12 —
8-Row Coil
Circuit Equivalent Length — 64.8 31.7 — 70.1 34.3 — 78 38.2
Face-Split Coils
No. of TXVs 48—48—48
No. of Circuits/Distributor* — 9,10 9,10 — 10 10 — 11 11
Suction Connections (in. OD) —1
5
⁄
8
1
5
⁄
8
—1
5
⁄
8
1
5
⁄
8
—1
5
⁄
8
1
5
⁄
8
Distributor Connections (in. OD) —1
1
⁄
8
1
1
⁄
8
—1
1
⁄
8
1
1
⁄
8
—1
3
⁄
8
1
3
⁄
8
Distributor Tube Length (in.) — 18 13 — 18 13 — 21 13
Distributor Nozzle Size† —8 4 — 8 4 —12 6
Row-Split Coils
No. of TXVs —4 8 — 4 8 — 4 8
No. of Circuits/Distributor* — 9,10 9,10 — 10 10 — 11 11
Suction Connections (in. OD) —1
5
⁄
8
1
5
⁄
8
—1
5
⁄
8
1
5
⁄
8
—1
5
⁄
8
1
5
⁄
8
Distributor Connections (in. OD) —1
3
⁄
8
1
1
⁄
8
—1
3
⁄
8
1
1
⁄
8
—1
3
⁄
8
1
3
⁄
8
Distributor Tube Length (in.) — 18 13 — 18 13 — 21 13
Distributor Nozzle Size† —8 4 — 8 4 —12 6
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 61 medium face area coil has 6 circuits on each distributor; the lower coil has 6 circuits
on one distributor and 7 circuits on the other 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.
57
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