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PHYSICAL DATA
524A-B,C UNITS
LEGEND
*Refer to Alternate Fan Motor Data table, page 80, for alternate motor data.
†Units are shipped without refrigerant charge.
UNIT 524A
072 090 120 150 180 240 300
NOMINAL CAPACITY (Tons) 67
1
/
2
10 12
1
/
2
15 20 25
OPERATING WEIGHT (lb)
Base Unit with TXV (3 Row/4 Row) 381/399 385/404 405/425 670/695 685/713 690/730 1020/1050
Plenum 175 175 175 225 225 225 325
Economizer 185 185 185 340 340 340 340
Hot Water Coil 195 195 195 285 285 285 345
Steam Coil 215 215 215 340 340 340 405
FANS
Qty...Diam. (in.) 1...15 1...15 1...15 2...15 2...15 2...15 2...18
Nominal Airflow (cfm) 2400 3000 4000 5000 6000 8000 10,000
Airflow Range (cfm) 1800-3000 2250-3750 3000-5000 3750-6250 4500-7500 6000-10,000 7500-12,500
Nominal Motor Hp (Standard Motor)*
208/230-1-60 1.3 2.4 — — — — —
208/230-3-60 and 460-3-60 2.4 2.4 2.4 2.9 3.7 5.0 7.5
575-3-60 1.0 2.0 2.0 3.0 3.0 5.0 7.5
Motor Speed (rpm)
208/230-1-60 1725 1725 — — — — —
208/230-3-60 and 460-3-60 1725 1725 1725 1725 1725 1745 1745
575-3-60 1725 1725 1725 1725 1725 1745 1755
REFRIGERANT R-22
Operating charge (lb)
(approx per circuit)† 3.0 3.0 1.5/1.5 2.0/2.0 2.5/2.5 3.5/3.5 4.5/4.5
DIRECT-EXPANSION COIL Enhanced Copper Tubes, Aluminum Sine-Wave Fins
Max Working Pressure (psig) 435
Face Area (sqft) 6.67 8.33 10.01 13.25 17.67 19.88 24.86
No. of Splits 11222 2 2
Split Type...Percentage ——
Face...50/50
No. of Circuits per Split (3 Row/4 Row) 12/12 15/15 9/9 9/12 12/16 13/18 15/20
Fins/in. 15 15 17 15 15 17 15
STEAM COIL
Max Working Pressure (psig at 400 F) 175
Total Face Area (sqft) 6.67 6.67 6.67 13.33 13.33 13.33 15.0
Rows...Fins/in. 1...9 1...9 1...9 1...10 1...10 1...10 1...10
HOT WATER COIL
Max Working Pressure (psig) 150
Total Face Area (sqft) 6.67 6.67 6.67 13.33 13.33 13.33 15.0
Rows...Fins/in. 2...8.5 2...8.5 2...8.5 2...8.5 2...8.5 2...8.5 2...12.5
Water Volume
(gal) 8.3 13.9 14.3
(ft
3
) 1.1 1.85 1.90
PIPING CONNECTIONS
Quantity...Size (in.)
DX Coil — Suction (ODF) 1...1
1
/
8
1...1
1
/
8
2...1
1
/
8
2...1
1
/
8
2...1
1
/
8
2...1
1
/
8
2...1
3
/
8
DX Coil — Liquid Refrigerant (ODF) 1...
5
/
8
2...
5
/
8
Steam Coil, In (MPT) 1...2
1
/
2
1...2
1
/
2
Steam Coil, Out (MPT) 1...1
1
/
2
1...1
1
/
2
Hot Water Coil, In (MPT) 1...1
1
/
2
1...1
1
/
2
1...2
Hot Water Coil, Out (MPT) 1...1
1
/
2
1...1
1
/
2
1...2
Condensate (PVC) 1...1
1
/
4
ODM/1 IDF
FILTERS Throwaway — Factory Supplied
Quantity...Size (in.) 4...16 x 24 x 2
4...16 x 20 x 2
4...16 x 24 x 2
4...20 x 24 x 2
4...20 x 25 x 2
Access Location Right or Left Side
DX — Direct Expansion
TXV—Thermostatic Expansion Valve
50TFQ004-012
524A072-300