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Table SP-4 – Model S Horizontal Unit Heater Steam Capacities con't
2 Lbs. Steam 60 F Entering Air Temp
Motor
Motor
Size
HP
RPM
1050
19-S2
1/25
950
800
1550
31-S
1/20
1300
1100
1550
45-S
1/20
1300
1100
1550
53-S
1/8
1300
1100
1550
69-S
1/8
1300
1100
1550
77-S
1/8
1300
1100
91-S
1/6
1100
127-S
1/6
1100
137-S
1/4
1100
181-S
1/4
1100
207-S
1/2
1100
243-S
1/2
1100
273-S
1/2
1100
Notes:
1. Constant speed units are rated at capacities shown in regular type: Capacities in italic faced type apply only to units with multi-speed motors.
2. Capacities based on 2 psi steam and 60 F entering air.
16
Selection
Procedure
BTU
Condensate
Per Hour
EDR
Lbs Per Hr
Low Final Temp. "Bypass" Units
19,300
80
18,300
77
16,300
68
30,400
127
27 ,800
116
25,300
106
45,800
191
41,300
173
37 ,300
156
53,300
223
50,200
209
46,200
192
69,400
290
63,400
264
57 ,600
240
76,600
320
71,700
299
65,800
274
91,000
380
125,800
524
135,800
567
180,700
755
206,900
863
238,700
995
272,200
1135
Final
CFM 70 F
Temp
Air Basis
20
106
390
19
108
360
17
110
300
31
104
635
29
109
520
26
112
450
47
107
897
43
112
740
39
116
630
55
105
1090
52
109
940
48
114
795
72
108
1337
66
112
1125
60
116
955
79
107
1510
74
111
1304
68
116
1100
94
108
1740
130
108
2440
140
107
2700
187
109
3392
214
107
4059
248
108
4607
283
105
5644
Outlet
Oper.
Velocity
Weight
220
205
40
173
359
302
40
257
363
304
55
259
439
383
55
327
407
346
70
295
458
300
80
341
394
95
448
135
495
135
430
180
514
185
439
230
536
235
UH-PRC001-EN
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