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RECOVERY CAPACITY
INPUT
TYPE OF
MODEL
GAS
BTUH
120,000
NATURAL/
BTH 120
PROPANE
150,000
NATURAL/
BTH 150
PROPANE
199,900
NATURAL/
BTH 199
PROPANE
250,000
NATURAL/
BTH 250
PROPANE
300,000
NATURAL/
BTH 300
PROPANE
399,900
NATURAL/
BTH 400
PROPANE
499,900
NATURAL/
BTH 500
PROPANE
Recovery capacities are based on heater performance at 95% and 96% thermal efficiency.
Add "A" to model number when ordering ASME. Optional on 120 - 250 models. Standard on 300 - 500 models.
Maximum gas supply pressure for 120 - 250: 10.5" w.c. natural gas 14" w.c propane. Maximum gas supply pressure for 300-500 10" w.c. natural gas 13" w.c. propane.
Manifold pressure: 4" w.c. natural gas 10" w.c. propane. Electrical requirements: 120 VAC, Blower 2.2 Amps FL, Igniter 4.0 Amps.
(Natural or Propane) gas water heater(s) shall be A. O. Smith Cyclone Xi model # _________ or equal, with up to 96% thermal efficiency, a storage capacity of
______ gallons, an input rating of __________ BTUs per hour, a recovery rating of ___________ gallons per hour (gph) at 100° F rise and a maximum hydrostatic
working pressure of 160 PSI. Water heater(s) shall: 1. Have seamless glass-lined steel tank construction, with glass lining applied to all water-side surfaces
after the tank has been assembled and welded; 2. Have a spiral-shaped heat exchanger placed entirely inside the tank, which shall be glass-lined to protect
against acidic flue gas condensate; 3. Have foam insulation and an ASME-rated temperature and pressure relief valve; 4. Have a down-fired power burner
designed for precise mixing of air and gas for optimum efficiency, requiring no special calibration on start-up; 5. Be approved for 0˝ clearance to combustibles.
Heater shall be supplied with maintenance-free powered anode.
The control shall be an integrated solid-state temperature and ignition control device with integral diagnostics, graphic user interface, fault history display, and
shall have digital temperature readout.
The water heater(s) shall: 1. Be design-certified by UL (Underwriters Laboratories), according to ANSZ21.10 standards governing storage-type water heaters; 2. Meet
ASHRAE/IESNA 90.1-1999; 3. Be design-certified by Underwriters Laboratories for 180° F (62° C) water; 4. Meet SCAQMD Rule 1146.2 f o r low-NOx emissions.
For conventional-vent specification: The BTH-120 - 250 water heater(s) shall be suitable for venting in 3˝ PVC pipe for a total equivalent distance of 50 ft
and 4˝ PVC pipe for a total equivalent distance of 120 ft.
The BTH-300 - 500 water heater(s) shall be suitable for venting only in 4˝ PVC pipe, for a total equivalent distance of 70 ft.
For sealed-combustion direct-vent specification: The BTH-120 - 250 water heater(s) shall be suitable for venting with (3˝ or 4˝) _______ diameter PVC pipe for a
total equivalent distance of (50 ft or 120 ft) ________ feet. [Alternative venting: the heater(s) shall be suitable for sealed combustion direct venting using a (3˝ or 4˝)
________ diameter PVC exhaust pipe for a total distance of (50 ft or 120 ft) ________ equivalent feet of vent and (50 ft or 120 ft) _______ equivalent feet of intake.]
The BTH-300 - 500 water heater(s) shall be suitable for sealed combustion direct-vent using only 4˝ diameter PVC pipe and 4˝ di a meter PVC exhaust pipe for a
total equivalent distance of 70 ft.
Operation of the water heater(s) in a closed system where thermal expansion has not been compensated for (with a properly sized thermal expansion tank) will
void the warranty.
December 2007R
July 2007R
UP TO 96% THERMAL EFFICIENCY,DIRECT VENT
Fº
Thermal
Approx.
Efficiency
Capacity
KW
Cº
60 U.S. Gal
GPH
95%
35
227 Litres
LPH
100 U.S. Gals. GPH
95%
44
379 Litres
LPH
100 U.S. Gals. GPH
95%
58
379 Litres
LPH
100 U.S. Gals. GPH
95%
73
379 Litres
LPH
130 U.S. Gals. GPH 1164
96%
88
492 Litres
LPH
130 U.S. Gals. GPH 1552
96%
117
492 Litres
LPH
130 U.S. Gals. GPH 1919
95%
146
492 Litres
LPH
SUGGESTED SPECIFICATION
r P
n i
e t
d
n i
. U
. S
. A
U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED
30 Fº
40 Fº
50 Fº
60 Fº
70 Fº
17 Cº
22 Cº
28 Cº
33 Cº
39 Cº
461
345
276
230
197
1744
1308
1046
872
747
576
432
345
288
247
2179
1635
1308
1090
934
767
575
460
384
329
2904
2178
1743
1452
1245
960
720
576
480
411
3632
2724
2179
1816
1557
873
699
582
499
4406
3304
2644
2203
1888
1164
931
776
665
5875
4406
3525
2938
2518
1439
1151
959
822
7263
5447
4358
3631
3113
For Technical Information and Automated Fax Service, call 800-527-1953.
A. O. Smith reserves the right to make product changes or improvements without prior notice.
80 Fº
90 Fº
100 Fº 110 Fº 120 Fº 130 Fº 140 Fº
44 Cº
50 Cº
56 Cº
61 Cº
67 Cº
173
154
138
126
115
654
581
523
476
436
216
192
173
157
144
817
726
654
594
545
288
256
230
209
192
1089
968
871
792
726
360
320
288
262
240
1362
1211
1044
991
908
436
388
349
318
291
1652
1469
1322
1201
1102
582
517
465
423
388
2203
1958
1759
1602
1469
720
640
576
523
480
2724
2421
2179
1981
1816
ACGSS02407
72 Cº
78 Cº
106
99
402
374
133
123
503
467
177
164
670
622
221
206
838
778
269
250
1017
945
359
332
1356
1259
443
411
1676
1556
Page 4 of 4
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