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PERFORMANCE DATA (cont)
HYDRONIC HEATING CAPACITIES
LEGEND
*Based on 5 psig steam, 60 F entering-air temperature. All steam coils
are non-freeze type.
†Based on 200 F entering water, 20 F water temperature drop, 60 F
entering-air temperature.
NOTES:
1. Maximum operating limits for heating coils: 20 psig at 260 F.
2. Leaving db = ent db (F) +
3. See Heating Correction Factors table.
HEATING CORRECTION FACTORS
NOTE: Multiply capacity given in the Hydronic Heating Capacities table by the correction factor for conditions at which unit is actually
operating. Correct leaving-air temperature using formula in Note 2 of Hydronic Heating Capacities table.
UNIT
524A-B
524A-C
AIRFLOW
(Cfm)
1-ROW
STEAM*
2-ROW
HOT WATER COIL†
Cap. Ldb Cap. Ldb
Water
Flow
(Gpm)
PD
072
1,800
2,400
3,000
146
173
209
134
126
123
156.0
183.0
206.0
140
131
124
15.6
18.3
20.6
3.4
4.3
5.2
090
2,250
3,000
3,750
168
209
240
129
123
117
174.0
206.0
238.0
133
124
118
17.4
20.6
23.8
4.0
5.2
6.5
120
3,000
4,000
5,000
209
243
279
123
115
111
299.0
275.0
316.0
152
124
119
29.9
27.5
31.6
5.0
6.6
8.2
150
3,750
5,000
6,250
370
425
465
150
137
128
362.0
409.0
456.0
149
136
128
36.2
40.9
45.6
4.2
5.1
6.0
180
4,500
6,000
7,500
402
458
479
141
129
118
412.0
471.0
529.0
145
133
125
41.2
47.1
52.9
4.5
5.5
6.6
240
6,000
8,000
10,000
458
487
499
129
115
105
506.0
584.0
652.0
138
128
120
50.6
58.4
65.2
5.1
6.3
7.5
300
7,500
10,000
12,500
511
575
626
122
112
106
649.0
752.0
842.0
140
130
122
64.9
75.2
84.2
5.7
7.1
8.5
Cap. — Capacity (Btuh in thousands)
Lab — Leaving-Air Dry-Bulb Temp (F)
PD — Pressure Drop (ft water)
Capacity (Btuh)
1.1 x cfm
HOT WATER COIL
Water Temp
Drop
(F)
Ent Water
Temp
(F)
Entering-Air Temp (F)
40 50 60 70 80
10
140 0.72 0.64 0.57 0.49 0.41
160 0.89 0.81 0.74 0.66 0.58
240 1.06 0.98 0.90 0.83 0.75
200 1.22 1.15 1.07 1.00 0.92
220 1.39 1.32 1.24 1.17 1.09
20
140 0.64 0.57 0.49 0.41 0.33
160 0.81 0.74 0.66 0.58 0.51
240 0.98 0.91 0.83 0.75 0.68
200 1.15 1.08 1.00 0.93 0.85
220 1.32 1.25 1.17 1.10 1.02
30
140 0.56 0.49 0.41 0.33 0.24
160 0.74 0.66 0.58 0.51 0.43
240 0.91 0.83 0.76 0.68 0.60
200 1.08 1.00 0.93 0.85 0.78
220 1.25 1.18 1.10 1.03 0.95
STEAM COIL
Steam Pressure
(psig)
Entering-Air Temp (F)
40 50 60 70 80
0 1.06 0.98 0.91 0.85 0.78
2 1.09 1.02 0.95 0.89 0.82
5 1.13 1.06 1.00 0.93 0.87
50TFQ004-012
524A072-300