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Table 7 — Direct Expansion Coil Circuiting Data
LEGEND
*May be field manifolded for either face split or row split.
†Where each TXV has the same number of circuits, that number is
shown once. When coil has an uneven number of circuits per TXV,
both values are shown.
**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
selection program for correct nozzle selection.
††Not available on 39LB units.
LARGE FACE AREA (39LA, 39LD)
UNIT SIZE 03 06 08 10 12
CIRCUITING TYPE Qtr Half Full Qtr Half Full Qtr Half Full Qtr Half Full Half Full
CFM AT 550 FPM 1996 3245 4345 5247 6149
FACE AREA (sq ft) 3.63 5.90 7.90 9.54 11.18
TUBE FACE 16 20 24 24 24
TUBE LENGTH (in.) 26.1 34.0 37.9 45.8 53.7
NUMBER OF CIRCUITS 4 8 16—1020—1224—12241224
NUMBER OF TXVs 222—22—22—2222
NUMBER OF CIRCUITS/TXV† 2 4 8—510—612—612612
SUCTION CONNECTIONS
(in. OD)
7
/
8
1
1
/
8
1
3
/
8
—1
1
/
8
1
3
/
8
—1
1
/
8
1
5
/
8
—1
1
/
8
1
5
/
8
1
1
/
8
1
5
/
8
DISTRIBUTOR CONNECTIONS
(in. OD)
7
/
8
7
/
8
1
1
/
8
—
7
/
8
1
1
/
8
—
7
/
8
1
5
/
8
—
7
/
8
1
5
/
8
7
/
8
1
1
/
8
4-ROW COIL
Circuit Equivalent Length (ft) 52 26 — — 32 — — 34 18 — 40 20 45 23
Distributor Tube Length (in.)
Face Split 11 11 — — 11 — — 13 15 — 13 15 13 15
Row Split 13 15 — — 16 — — 18 18 — 18 18 18 18
Distributor Nozzle Size** 22——3——44—5566
6-ROW COIL
Circuit Equivalent Length (ft) — 39 20 — 47 24 — 51 26 — 59 30 67 34
Distributor Tube Length (in.)
Face Split — 11 11 — 11 13 — 13 15 — 13 15 13 15
Row Split — 15 16 — 16 18 — 18 21 — 18 21 18 21
Distributor Nozzle Size** —2 3—33—44—5566
LARGE FACE AREA (39LA, 39LD)
UNIT SIZE 15 18 21 25
CIRCUITING TYPE Half Full Half Full Half Full Double Half Full Double
CFM AT 550 FPM 8200 9740 11,880 13,750
FACE AREA (sq ft) 14.91 17.71 21.6 25.0
TUBE FACE 32 38 38 22U-22L
TUBE LENGTH (in.) 53.7 53.7 65.5 65.5
NUMBER OF CIRCUITS 16 32 19 38 19 38 — 22 44 88
NUMBER OF TXVs 24*24*24* — 2 22244
NUMBER OF CIRCUITS/TXV† 8 8 9-10 9-10 9-10 9-10 — 5-6 5-6 11 11 11 11
SUCTION CONNECTIONS
(in. OD)
1
3
/
8
1
3
/
8
1
3
/
8
1
3
/
8
1
3
/
8
1
1
/
8
—1
1
/
8
1
1
/
8
1
3
/
8
1
3
/
8
1
5
/
8
1
5
/
8
DISTRIBUTOR CONNECTIONS
(in. OD)
1
1
/
8
1
1
/
8
1
1
/
8
1
1
/
8
1
1
/
8
1
1
/
8
—
7
/
8
7
/
8
1
3
/
8
1
3
/
8
1
3
/
8
1
3
/
8
4-ROW COIL
Circuit Equivalent Length (ft) 45 23 45 23 54 26 — 54 54 26 26 — —
Distributor Tube Length (in.)
Face Split 15 16 16 16 16 16
3
/
4
— 12121515——
Row Split 26 16 28 16 28 16
3
/
4
— 21212323——
Distributor Nozzle Size** 84105105— 8855——
6-ROW COIL
Circuit Equivalent Length (ft) 67 34 67 34 81 40 — — — 40 40 — —
Distributor Tube Length (in.)
Face Split 15 16 16 18 16 18
1
/
2
———1515——
Row Split 23 16 28 18 28 18
1
/
2
———2222——
Distributor Nozzle Size** 84105105———55——
AHU — Air-Handling Unit Selection Program
TXV — Thermostatic Expansion Valve (Field-supplied)