Recovery Capacity

					UP TO 96% THERMAL EFFICIENCY,DIRECT VENT
RECOVERY CAPACITY
								U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED
MODEL	TYPE OF	INPUT		Thermal	Approx.	Fº	30 Fº	40 Fº	50 Fº	60 Fº	70 Fº	80 Fº	90 Fº	100 Fº	110 Fº	120 Fº	130 Fº	140 Fº
	GAS	BTUH	KW	Efﬁciency	Capacity	Cº	17 Cº	22 Cº	28 Cº	33 Cº	39 Cº	44 Cº	50 Cº	56 Cº	61 Cº	67 Cº	72 Cº	78 Cº

BTH 120	NATURAL/	120,000		95%	60 U.S. Gal	GPH	461	345	276	230	197	173	154	138	126	115	106	99
	PROPANE		35		227 Litres	LPH	1744	1308	1046	872	747	654	581	523	476	436	402	374

BTH 150	NATURAL/	150,000		95%	100 U.S. Gals. GPH		576	432	345	288	247	216	192	173	157	144	133	123
	PROPANE		44		379 Litres	LPH	2179	1635	1308	1090	934	817	726	654	594	545	503	467

BTH 199	NATURAL/	199,900		95%	100 U.S. Gals. GPH		767	575	460	384	329	288	256	230	209	192	177	164
	PROPANE		58		379 Litres	LPH	2904	2178	1743	1452	1245	1089	968	871	792	726	670	622

BTH 250	NATURAL/	250,000		95%	100 U.S. Gals. GPH		960	720	576	480	411	360	320	288	262	240	221	206
	PROPANE		73		379 Litres	LPH	3632	2724	2179	1816	1557	1362	1211	1044	991	908	838	778

BTH 300	NATURAL/	300,000		96%	130 U.S. Gals. GPH		1164	873	699	582	499	436	388	349	318	291	269	250
	PROPANE		88		492 Litres	LPH	4406	3304	2644	2203	1888	1652	1469	1322	1201	1102	1017	945

BTH 400	NATURAL/	399,900		96%	130 U.S. Gals. GPH		1552	1164	931	776	665	582	517	465	423	388	359	332
	PROPANE		117		492 Litres	LPH	5875	4406	3525	2938	2518	2203	1958	1759	1602	1469	1356	1259

BTH 500	NATURAL/	499,900		95%	130 U.S. Gals. GPH		1919	1439	1151	959	822	720	640	576	523	480	443	411
	PROPANE		146		492 Litres	LPH	7263	5447	4358	3631	3113	2724	2421	2179	1981	1816	1676	1556

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.

SUGGESTED SPECIFICATION

(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 riseand 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 approvedfor 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 userinterface, 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 governingstorage-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 for 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-combustiondirect-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 sealedcombustion 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 120ft) _______ 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˝ diameter 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 sizedthermal expansion tank) will void the warranty.

		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.

		Page 4 of 4
DecemberJuly2007R2007R		ACGSS02407
DecemberJuly2007R2007R	Printed in U.S.A.

ACGSS02407, BTH-120 through BTH-500 specifications

A.O. Smith is renowned for its innovative water heating solutions, and their BTH series, which ranges from BTH-120 to BTH-500, exemplifies this commitment to quality and efficiency. These models are designed for commercial applications, providing reliable performance for businesses in various industries.

The BTH-120 to BTH-500 models feature a robust construction that ensures durability and longevity. Built with high-quality materials, these commercial water heaters are designed to withstand the rigors of heavy use. Their compact design makes them easy to install in limited spaces while maintaining high performance levels.

One of the standout features of the A.O. Smith BTH series is its advanced heating technology. These units utilize a high-efficiency gas burner system, providing rapid heating capabilities that ensure hot water is readily available when needed. This is particularly beneficial for businesses requiring consistent hot water supply, such as hotels, restaurants, and hospitals.

The BTH series also includes sophisticated controls that enhance user convenience and operational efficiency. With intuitive digital displays, operators can easily monitor temperature settings and operational status. This allows for precise control over heating schedules, which can lead to energy savings and improved operational effectiveness.

Another significant characteristic of the BTH models is their energy efficiency. These water heaters meet or exceed the latest energy standards, ensuring businesses can reduce their operational costs while being mindful of environmental impact. The high recovery rates of these units mean that they can provide substantial amounts of hot water without excessive energy consumption, making them a cost-effective option for any commercial setting.

Safety is also a paramount consideration in the design of the BTH series. These water heaters are equipped with multiple safety features, including thermal overload protection and integrated safety shut-off valves. This ensures peace of mind for operators, knowing that the system is designed to function safely under high demands.

In summary, A.O. Smith’s BTH-120 through BTH-500 models offer a combination of durability, advanced heating technology, user-friendly controls, energy efficiency, and safety features. These characteristics make them an ideal choice for various commercial applications, delivering performance and reliability that businesses can count on for their hot water needs.

30 Fº

40 Fº

50 Fº

60 Fº

70 Fº

80 Fº

90 Fº

22 Cº

28 Cº

33 Cº

39 Cº

44 Cº

50 Cº

LPH

1676

SUGGESTED SPECIFICATION

For Technical Information and Automated Fax Service, call 800-527-1953.

ACGSS02407, BTH-120 through BTH-500 specifications