A.O. Smith BTI 120 User Manual
2
ROUGH-IN-DIMENSIONS
Model
BTI-120
BTI-154
BTI-180
BTI-199
BTI-200
BTI-250
BTI-275
BTI-310
BTI-366
BTI-400
Dim.
Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm
Inches mm
A
63
1800
70
1778
70
1778
70
1778
72
1829
72
1829
72
1829
73
1854
73
1854
73
1854
B
4 1/4
108
4 1/4
108
4 1/4
108
4 1/4
108
4 1/2
114
4 1/2
114
4 1/2
114
4 1/2
114
4 1/2
114
4 1/2
114
C
59 1/2 1511
66 1/2 1689 66 1/2 1689 66 1/2 1889
70
1778
70
1778
70
1778
72
1829
72
1829
72
1829
D
50 7/8 1292 57 7/8 1470 57 7/8 1470 57 7/8 1470 61 5/8 1565 61 5/8 1565 61 5/8 1565 62 1/2 1588 62 1/2 1588
62 1/2 1588
E
19 11/16 500 19 11/16 500 19 11/16 500 19 11/16 500 20 1/2 521
20 1/2
521
20 1/2 521
20 1/2 521
22 1/2 572
22 1/2
572
F
19
483
19
483
19
483
19
483
21
533
21
533
21
533
21
533
21
533
21
533
G
1/2NPT 1/2NPT 1/2NPT 1/2NPT 1/2NPT
1/2NPT
1/2NPT
3/4NPT 3/4NPT 3/4NPT
(gas inlet)
H
51 7/8 1318
59
1499
59
1499
59
1499
61
1549
61
1549
61
1549
63
1600
63
1600
63
1600
I
5
127
6
152
6
152
6
152
6
152
6
152
6
152
6
152
6
152
6
152
(vent dia)
J
27 3/4 705
27 3/4 705
27 3/4
705 27 3/4
705 27 3/4 705
27 3/4
705
27 3/4 705
27 3/4 705
27 3/4 705
27 3/4
705
K 1 1/2NPT 1 1/2NPT 1 1/2NPT 1 1/2NPT 2NPT 2NPT 2NPT 1 1/2NPT 1 1/2NPT 1 1/2NPT
L 1 1/2NPT 1 1/2NPT 1 1/2NPT 1 1/2NPT 2NPT 2 NPT 2NPT 1 1/2NPT 1 1/2NPT 1 1/2NPT
Appox.
Shipping
400
181
470
213
470
213
470
213
603
274
603
274
603
274
725
329
725
329
725
329
Weight
lbs.
K.g
lbs.
K.g
lbs.
K.g
lbs.
K.g
lbs.
K.g
lbs.
K.g
lbs.
K.g
lbs.
K.g
lbs.
K.g
lbs.
K.g
STD.
Approx.
Shipping
-
-
-
-
-
-
-
-
686
311
686
311
686
311
833
378
833
378
833
378
Weight
lbs.
Kg.
lbs.
Kg.
lbs.
Kg.
lbs.
Kg.
lbs.
Kg.
lbs.
Kg.
ASME
FRONT VIEW
TOP VIEW
BACK VIEW
TABLE 1. ROUGH-IN-DIMENSIONS
TANK
APPROX
U.S Gallons/Hr. and Litres/Hr at TEMPERATURE RISE INDICATED
CAPACITY
EFF.
F°
36F°
40F°
50F°
54F°
60F°
70F° 72F° 80F° 90F° 100F° 108F° 110F° 120F° 126F° 13F°
140F°
Model
Btuh
KW U.S.Gal. Litres
%
C°
20C° 22.2C° 27.7C° 30C° 33.3C° 38.8C° 40C° 44.4C° 50C° 55.5C° 60C° 61.1C° 66.6C° 70C° 72.2C° 77.7C°
BTI-120 120,000
71
80
GPH 319
287
230
213
192
164
160
144
128
115
106
105
96
91
88
82
35
269
LPH 1209
1088
870
806
725
622
604
544
484
435
403
396
363
345
335
311
BTI-154 154,000
81
80
GPH
410
369
295
273
246
211
205
184
164
148
137
134
123
117
113
105
45
307
LPH 1551
1396
1117
1034
931
798
776
698
621
559
517
508
465
443
430
399
BTI-180 180,000
81
80
GPH 479
431
345
319
287
246
240
216
192
172
160
157
144
137
133
123
53
307
LPH 1813
1632
1306
1209
1088
933
907
816
725
653
604
593
544
518
502
466
BTI-190 190,000
81
80
GPH 506
455
364
337
303
260
253
228
202
182
169
165
152
144
140
130
56
307
LPH 1914 1723
1378 1276
1148
984
957
861
766
689
638
626
574
547
530
492
BTI-199 199,000
81
80
GPH
530
477
381
353
318
272
265
238
212
191
177
173
159
151
147
136
58
307
LPH 2005
1804
1443
1336
1203
1031 1002
902
802
722
668
656
601
573
555
516
BTI-250 250,000
100
80
GPH 665
599
479
444
399
342
333
299
266
240
222
218
200
190
184
171
73
379
LPH 2519
2267
1813
1679
1511
1295 1259 1133 1007
907
840
824
756
720
697
648
BTI-275 275,000
100
80
GPH
732
659
527
488
439
376
366
329
293
263
244
240
220
209
203
188
81
379
LPH 2770
2493
1995
1847
1662
1425 1385 1247 1108
997
923
907
831
792
767
712
BTI-310 310,000
85
80
GPH
825
743
594
550
495
424
413
371
330
297
275
270
248
236
228
212
91
322
LPH 3123
2811
2249
2082
1874
1606 1561 1405 1249
1124 1041
1022
937
892
865
803
BTI-366 366,000
85
80
GPH
974
877
701
649
584
501
487
438
390
351
325
319
292
278
270
250
107
322
LPH 3687
3318
2655
2458
2212
1896 1844 1659 1475
1327 1229
1207
1106
1053
1021
948
BTI-400 399,000
85
80
GPH 1062
956
765
708
637
546
531
478
425
382
354
348
319
303
294
273
117
322
LPH 4020 3618
2894
2680
2412
2067 2010 1809 1608
1447 1340
1315 1206
1148
1113
1034
TABLE 2. RECOVERY CAPACITIES, based on 80% efficiency
TABLE 3. GAS AND ELECTRICAL CHARACTERISTICS
F
TOP
OUTLET
1 1/2” NPT
TOP
INLET
1 1/2” NPT
Manifold Pressure
Maximum Supply Pressure Electrical Characteristics
Model
Type of Gas
Inches vs. W.C.
kPa
Inches W.C.
kPa
Volts/Hz
Amperes
Natrual
3.5
0.87
14
3.48
120/60
< 5
Propane
10
2.49
14
3.48
120/60
< 5
BTI 120-400
Minimum Supply Pressure, Natural Gas: 4.5 inches W.C. (1.12kPa)
Minimum Supply Pressure, Propane Gas: 11.0 inches W.C. (1.74kPa)
Minimum Pressures must be maintained under both load and no load (static and dynamic) conditions.
Minimum Supply Pressure, Propane Gas: 11.0 inches W.C. (1.74kPa)
Minimum Pressures must be maintained under both load and no load (static and dynamic) conditions.