Carrier 39LB - Manual (Page 21)

21
Table 7 — Direct Expansion Coil Circuiting Data (cont)
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.
SMALL FACE AREA (39LB, 39LC, 39LF)
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 1496 2596 3619 4372 5126
FACE AREA (sq ft) 2.72 4.72 6.58 7.95 9.32
TUBE FACE 12 16 20 20 20
TUBE LENGTH (in.) 26.1 34.0 37.9 45.8 53.7
NUMBER OF CIRCUITS 4 6 — 4 8 16 — 10 20 — 10 20 10 20
NUMBER OF TXVs 2 2 — 2 2 2 — 2 2 — 2 2 2 2
NUMBER OF CIRCUITS/TXV† 2 3 — 2 4 8 — 5 10 — 5 10 5 10
SUCTION CONNECTIONS
(in. OD)
7 /
8
1 1 /
8
— 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
— 7 /
8
7 /
8
1 1 /
8
— 7 /
8
7 /
8
— 7 /
8
7 /
8
7 /
8
7 /
8
4-ROW COIL
Circuit Equivalent Length (ft) 52 26 — 62 32 — — 34 18 — 40 20 45 23
Distributor Tube Length (in.)
Face Split 11 11 — 11 11 — — 11 18 — 11 18 11 18
Row Split 11 11 — 11 15 — — 16 18 — 16 18 16 18
Distributor Nozzle Size** 1 1 / 2 1 1 / 2 — 2 1 / 2 2 1 / 2 — — 4 4 — 5 5 5 5
6-ROW COIL
Circuit Equivalent Length (ft) 58 39 — — 47 24 — 51 26 — 59 30 67 34
Distributor Tube Length (in.)
Face Split 11 1 /
2
11 1 /
2
— — 11 1 /
2
11 1 /
2
— 11 1 /
2
13 — 11 1 /
2
13 11 1 /
2
13
Row Split 11 1 / 2 13 — — 15 16 — 16 18 1 / 2 — 16 18 1 / 2 16 18 1 / 2
Distributor Nozzle Size** 1 1 /
2
1 1 /
2
— — 2 1 /
2
3 — 4 4 — 5 5 5 5
8-ROW COIL††
Circuit Equivalent Length (ft) — 52 — — 63 32 — 68 34 — 78 39 89 45
Distributor Tube Length (in.)
Face Split — 11 1 /
2
— — 11 1 /
2
11 1 /
2
— 11 1 /
2
13 — 11 1 /
2
13 11 1 /
2
13
Row Split — 13 — — 15 16 — 16 18 1 /
2
— 16 18 1 /
2
16 18 1 /
2
Distributor Nozzle Size** — 1 1 / 2 — — 2 1 / 2 3 — 4 4 — 5 5 5 5
SMALL FACE AREA (39LB, 39LC, 39LF)
UNIT SIZE 15 18 21 25
CIRCUITING TYPE Half Full Half Full Half Full Half Full Double
CFM AT 550 FPM 6666 7689 9405 11,275
FACE AREA (sq ft) 12.12 13.98 17.1 20.5
TUBE FACE 26 30 30 36
TUBE LENGTH (in.) 53.7 53.7 65.5 65.5
NUMBER OF CIRCUITS 16 26 15 30 15 30 18 36 72
NUMBER OF TXVs 2 4* 2 4* 2 4* 2 4* 4*
NUMBER OF CIRCUITS/TXV† 6-7 6-7 7-8 7-8 7-8 7-8 9 9 18
SUCTION CONNECTIONS
(in. OD)
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 5 /
8
DISTRIBUTOR CONNECTIONS
(in. OD)
7 / 8
7 / 8
7 / 8 -1 1 / 8
7 / 8 -1 1 / 8
7 / 8 -1 1 / 8
7 / 8 -1 1 / 8 1 1 / 8 1 1 / 8 1 3 / 8
4-ROW COIL
Circuit Equivalent Length (ft) 45 23 45 23 54 26 54 26 —
Distributor Tube Length (in.)
Face Split 13 16 13 16 13/15 16 16 15 —
Row Split 21 16 23 16 23 1 /
2
16 26 15 —
Distributor Nozzle Size** 6 3 8 4 8 4 8 4 —
6-ROW COIL
Circuit Equivalent Length (ft) 67 34 67 34 81 40 — 40 —
Distributor Tube Length (in.)
Face Split 13 16 13 16 13/15 16 — 16 3 /
4
—
Row Split 21 16 23 1 /
2
16 23 1 /
2
16 — 16 3 /
4
—
Distributor Nozzle Size** 6 3 8 4 8 4 — 4 —
8-ROW COIL
Circuit Equivalent Length (ft) 89 45 89 45 — 54 — 54 26
Distributor Tube Length (in.)
Face Split 13 16 15 16 — 16 — 16 3 /
4
16
Row Split 21 16 23 1 /
2
16 — 16 — 16 3 /
4
16
Distributor Nozzle Size** 6 3 8 4 — 4 — 4 8
AHU — Air-Handling Unit Selection Program
TXV — Thermostatic Expansion Valve (Field-supplied)