A.O. Smith BTN 120-40D Manuale Utente
Commercial Gas Water Heaters
SUGGESTED SPECIFICATION
Water Heater(s) shall be Model __________ as manufactured by A. O. SMITH, or equal. Water heater(s) shall be of glass-lined design,
and gasfi red, equipped to burn __________ gas and design certifi ed by the Underwriter Laboratory under Volume III tests for
commercial heaters for delivery of 180°F water, and meet the requirements of ASHRAE/IES 90.1-2004. Heaters shall have an input
rating of __________ and a recovery rating of __________ GPH at a temperature rise of 100°F with a storage capacity of __________
gallons. Heaters shall be equipped with 1 1/2” water inlet and outlet openings (BTN 200, 250, 275, 310 rear openings are 2”), a 2 3/4”
x 3 3/4” boiler-type handhole cleanout and shall have a maximum working pressure of 160 psi. Water heater(s) shall be equipped
with an integrated control system consisting of a 180°F adjustable thermostat with upper and lower sensing bulbs, which average
the water temperatures at the top and bottom of the tank for maximum water temperature control. Heater(s) shall be provided
with a manual reset gas shutoff device, a gas pressure regulator set for the type of gas supplied, coated steel burners, an approved
draft diverter, anodes for cathodic protection, fl ue damper and IID system. A.G.A. pressure and temperature relief valve shall be
furnished and installed by the factory. The heater shall be insulated with foam insulation or equal. The outer jacket shall have a
baked enamel fi nish over a bonderized undercoating. All internal surfaces of the heater(s) exposed to water shall be glass-lined
with an alkaline borosilicate composition that has been fused-to-steel by fi ring at a temperature range of 1400° to 1600°F. Heater
tank shall have a 3 year limited warranty against corrosion or sediment buildup as outlined in the written warranty. Fully illustrated
instruction manual to be included.
and gasfi red, equipped to burn __________ gas and design certifi ed by the Underwriter Laboratory under Volume III tests for
commercial heaters for delivery of 180°F water, and meet the requirements of ASHRAE/IES 90.1-2004. Heaters shall have an input
rating of __________ and a recovery rating of __________ GPH at a temperature rise of 100°F with a storage capacity of __________
gallons. Heaters shall be equipped with 1 1/2” water inlet and outlet openings (BTN 200, 250, 275, 310 rear openings are 2”), a 2 3/4”
x 3 3/4” boiler-type handhole cleanout and shall have a maximum working pressure of 160 psi. Water heater(s) shall be equipped
with an integrated control system consisting of a 180°F adjustable thermostat with upper and lower sensing bulbs, which average
the water temperatures at the top and bottom of the tank for maximum water temperature control. Heater(s) shall be provided
with a manual reset gas shutoff device, a gas pressure regulator set for the type of gas supplied, coated steel burners, an approved
draft diverter, anodes for cathodic protection, fl ue damper and IID system. A.G.A. pressure and temperature relief valve shall be
furnished and installed by the factory. The heater shall be insulated with foam insulation or equal. The outer jacket shall have a
baked enamel fi nish over a bonderized undercoating. All internal surfaces of the heater(s) exposed to water shall be glass-lined
with an alkaline borosilicate composition that has been fused-to-steel by fi ring at a temperature range of 1400° to 1600°F. Heater
tank shall have a 3 year limited warranty against corrosion or sediment buildup as outlined in the written warranty. Fully illustrated
instruction manual to be included.
For Technical Information and Automated Fax Service, call 800-527-1953. A.O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
www.hotwater.com
AOSCG10500
Revised September 2008
PG 4 OF 4
Dimension Tables for BTN Models 120-400
Model
Approx.
Tank Cap.
(Gals.)
Type of
Gas
Input
Rating
Btu/Hr.
A
B
C
D
E
F
G
H
I
J
Approx. Ship.
Weight
Std.
ASME
BTN120
71
nat
120,000
63
4 1/4
59 1/2
50 7/8
19 5/8
19
1/2
51 7/8
6
27 3/4
400
--
BTN154
81
nat
154,000
68
4 1/2
62
53 5/8
20 1/2
21
1/2
54 5/8
6
27 3/4
470
--
BTN180
99
nat
180,000
72
4 1/2
70
61 5/8
20 1/2
21
1/2
61
6
27 3/4
470
--
BTN199
99
nat
199,000
72
4 1/2
70
61 5/8
20 1/2
21
1/2
61
6
27 3/4
470
--
BTN200(A)
100
nat
199,000
72
4 1/2
70
61 5/8
20 1/2
21
1/2
61
6
27 3/4
603
625
BTN250(A)
100
nat
250,000
72
4 1/2
70
61 5/8
20 1/2
21
1/2
61
6
27 3/4
603
625
BTN275(A)
100
nat
275,000
72
4 1/2
70
61 5/8
20 1/2
21
1/2
61
6
27 3/4
603
625
BTN310(A)
85
nat
310,000
73
4 1/2
72
62 1/2
20 1/2
21
1/2
63
6
27 3/4
603
625
BTN366(A)
85
nat
366,000
73
4 1/2
72
62 1/2
22 1/2
21
1/2
63
6
27 3/4
725
833
BTN400(A)
85
nat
390,000
73
4 1/2
72
62 1/2
22 1/2
21
1/2
63
6
27 3/4
725
833
All dimensions are in inches.
Recovery Capacities for BTN
Model
Input
Rating
Btu/Hr.
Gal.
Temperature Rise - Degrees F - Gallons Per Hour
30
40
50
60
70
80
90
100
110
120
130
140
BTN120
120,000
71
388
291
233
194
166
145
129
116
106
97
90
83
BTN154
154,000
81
498
373
299
249
213
187
166
149
136
124
115
107
BTN180
180,000
99
582
436
349
291
249
218
194
175
159
145
134
125
BTN199
199,000
99
643
482
386
322
276
241
214
193
175
161
148
138
BTN200(A)
199,000
100
643
482
386
322
276
241
214
193
175
161
148
138
BTN250(A)
250,000
100
808
606
485
404
346
303
269
242
220
202
186
173
BTN275(A)
275,000
100
889
667
533
444
381
333
296
267
242
222
205
190
BTN310(A)
310,000
85
1002
752
601
501
430
376
334
300
273
251
231
215
BTN366(A)
366,000
85
1183
887
710
592
507
444
394
355
323
296
273
254
BTN400(A)
390,000
85
1261
945
756
630
540
473
420
378
344
315
291
270
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