A O Smith Acgss02407 Specifications 188427_ACGSS02407

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ACGSS02407

UP TO 96% THERMAL EFFICIENCY,DIRECT VENT

The A.O. Smith Cyclone Xi family of products represents the industry’s most technologically

advanced commercial water heaters. The innovative Cyclone Xi design takes performance to

its highest level with efficiencies of 95% and 96%. Models are available from 120,000 BTUs

and now up to 500,000 BTUs. In addition, the Cyclone Xi features an Intelligent Control

System making it the smartest water heater in the industry.

Cyclone Xi provides outstanding hot water output, with dramatic savings on operating costs

compared to units with standard 80% efficiency. A.O. Smith’s leading-edge engineering

delivers conventional power-vent or sealed combustion power direct-vent versatility, low NOx

emissions and excellent space-saving characteristics. Powered anodes, standard on all

Cyclone Xi models, provide superior tank protection for years of trouble free operation.

INTELLIGENT CONTROL SYSTEM WITH LCD DISPLAY

• Exclusive A.O. Smith designed control

• Provides detailed water heater status information

• Precise temperature control

• Built-in diagnostics

• Run histrory information

SUBMERGED COMBUSTION CHAMBER,

WITH HELICAL HEAT EXCHANGER COIL

• Positioned in center of tank, surrounded by water to virtually

eliminate radiant heat loss from chamber

• Spiral heat exchanger keeps hot burner gases swirling, uses centrifugal

force to maximize efficiency of heat transfer to water in tank

• Spiral heat exchanger prevents scale and sediment from forming on

water-side surface, which can reduce energy efficiency over time

POWERED ANODES STANDARD ON ALL MODELS

• Provides long-lasting tank protection in varying water conditions

• Does not require maintenance or inspection

PERMAGLAS®ULTRA COAT™GLASS LINING

• Exclusive process provides superior protection against corrosion

• Both sides of heat exchanger coil are lined for protection against flue gas

condensate inside coil

MECHANICAL VENTING VERSATILITY

• Conventional power-venting or sealed combustion direct venting

• Vents vertically or through sidewall

• Direct-vent intake and exhaust pipe can terminate separately outside building,

or through single opening, using concentric vent assembly

• Uses inexpensive PVC, CPVC or ABS pipe for intake and exhaust

HIGH EFFICIENCY PRE-MIX POWERED BURNER

• Down-fired pre-mix burner provides optimum efficiency and quiet operation

• Top-mounted burner position prevents condensation from affecting burner operation

BTH-120

through

BTH-500

Approved,

Rule 1146.2 Low NOx for

California and Texas

BTH-120-250

BTH-300-500

July 2007R

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December 2007R

ACGSS02407

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OTHER CYCLONE Xi FEATURES

SPACE-SAVING DESIGN FOR INSTALLATION FLEXIBILITY

• Reduced footprint, ease of service, protection from water damage in case of flooding

• Easy to remove top cover for convenient access to serviceable parts

• 0˝ installation clearances on sides and rear, 2˝ installation clearance on top, 4˝ alcove installation clearance in front

of unit

• 0˝ clearance to combustibles, approved for combustible floors

FACTORY-INSTALLED TEMPERATURE AND PRESSURE RELIEF VALVE

MAXIMUM HYDROSTATIC WORKING PRESSURE: 160 PSI

HANDHOLE CLEANOUT

• Allows easy access to tank interior for cleaning

CODES AND STANDARDS

•Design-certified by UL (Underwriters Laboratories) International, according to ANSZ21.10.3-CSA4.3 standards

governing storage-type water heaters

• Meets ASHRAE/IESNA 90.1-1999• Design-certified by Underwriters Laboratories to NSF standard 5 for 180° F (62° C) water

• Meets SCAQMD Rule 1146.2 for low-NOx emissions

• ASME tank construction optional on 120 to 250 model sizes. ASME tank construction standard on 300,400 and 500 models

THREE-YEAR LIMITED TANK WARRANTY

• For complete warranty details, consult written warranty shipped with heater, or contact A. O. Smith

INSTALLATION CONSIDERATIONS

1. Condensate Drain – This is a fully condensing water heater and should be located near a drain to permit proper

disposal of condensate.

2. Vent Termination – Exhaust gases of this water heater are less than 140° F. In cold climates water vapor in flue

gases will condense into a cloud of vapor where the vent exits the building. This vapor can gradually discolor exterior

building surfaces. Vent termination should be located where this vapor cloud and potential discoloration are not a

concern. Locating vent termination 6˝ or more from the wall helps vapor from being trapped along a building’s face.

To avoid this problem, the vent can be terminated on the roof. Always locate vent termination above the maximum

snowline, and do not locate vent termination above a walkway.

3 Air Intake – In cold climates, air intake should be located at least three feet from the vent termination of the water

heater and any other appliance vents that dischar

ge moisture-laden air (such as clothes dryers). This will help prevent

freeze-over of the intake screen required to prevent foreign objects from entering the intake pipe. Air intake should be

located above the maximum snowline.

4. Blockage Sensors – The water heater is equipped with sensors to shut it down if blockage of vent or air intake occurs.

A light on the heater’s diagnostic panel will alert service technicians to this problem.

5. Noise – Vent terminal should be located away from bedroom windows or other areas where blower noise will be

objectionable. Avoid venting into corners or confined areas, which will amplify sound. Anchoring intake or vent pipe

to walls or ceilings can cause noise to be transmitted to living areas, and isolation mounts should be used where

anchoring is required.

6 Optional Concentric Vent Kit - Helps to minimize unsightly wall/r

oof penetrations.

BTH-120 - 300 vent kit p/n 9003910105

BTH-400 - 500 vent kit p/n 9006144005

UP TO 96% THERMAL EFFICIENCY,DIRECT VENT

ACGSS02407

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INSTALLATION CLEARANCES

Sides 0˝

Front 0˝

Rear 0˝

Top 1.5˝

To Combustibles* 0˝

• Approved for combustible floors

DIMENSIONS AND SHIPPING WEIGHTS

Water connections: 1-1/2˝

MAXIMUM EQUIVALENT

VENT LENGTH:

BTH-

120 – 250

using 3˝ pipe:

50 ft.

BTH-

120 – 250

using 4˝ pipe:

120 ft.

BTH-

300 – 500

using 3˝ pipe:

not applicable

BTH-

300 – 500

using 4˝ pipe:

70 ft.

GAS VALVE PIPING

BTH-120 1/2˝ NPT

BTH-150 3/4˝ NPT

BTH-199 3/4˝ NPT

BTH-250 3/4˝ NPT

BTH-300 1 1/4˝ NPT

BTH-400 1 1/4˝ NPT

BTH-500 1 1/2˝ NPT

MODEL

DIMENSIONS SHIP WEIGHT

STD

SHIP WEIGHT

ASME

A B C D E F G

INCHES/CM INCHES/CM INCHES/CM INCHES/CM INCHES/CM INCHES/CM INCHES/CM LBS/KG LBS/KG

BTH-120 55.5/141 44.5/113 35/88.9 27.75/70.5 7.5/19.1 6.3/16 47/119.4 460Lbs/208.7Kg 490Lbs/222.2Kg

BTH-150 75.5/191.8 64.5/163.8 55.5/141 27.75/70.5 7.5/19.1 6.3/16 68/172.7 555Lbs/251.7Kg 595Lbs/269.9Kg

BTH-199, 250 75.5/191.8 64.5/163.8 55.5/141 27.75/70.5 7.5/19.1 6.3/16 72/182.9 555Lbs/251.7Kg 595Lbs/269.9Kg

BTH-300, 400, 500 75.5/191.8 64.5/163.8 50.77/129 33.12/84.1 8/20.3 4.86/12.3 67.25/170.8 N/A 855Lbs/408.2 Kg

D

F

BTH-300-500

BTH-120-250

E

G

C

B

WATER OUTLET

1 1/2˝ NPT

A

UP TO 96% THERMAL EFFICIENCY,DIRECT VENT

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 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 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-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˝ 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 sized thermal expansion tank) will

void the warranty.

ACGSS02407

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U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED

MODEL TYPE OF

GAS

INPUT Thermal

Efficiency

Approx.

Capacity

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

BTUH KW 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/

PROPANE

120,000 95% 60 U.S. Gal GPH 461 345 276 230 197 173 154 138 126 115 106 99

35 227 Litres LPH 1744 1308 1046 872 747 654 581 523 476 436 402 374

BTH 150 NATURAL/

PROPANE

150,000 95% 100 U.S. Gals. GPH 576 432 345 288 247 216 192 173 157 144 133 123

44 379 Litres LPH 2179 1635 1308 1090 934 817 726 654 594 545 503 467

BTH 199 NATURAL/

PROPANE

199,900 95% 100 U.S. Gals. GPH 767 575 460 384 329 288 256 230 209 192 177 164

58 379 Litres LPH 2904 2178 1743 1452 1245 1089 968 871 792 726 670 622

BTH 250 NATURAL/

PROPANE

250,000 95% 100 U.S. Gals. GPH 960 720 576 480 411 360 320 288 262 240 221 206

73 379 Litres LPH 3632 2724 2179 1816 1557 1362 1211 1044 991 908 838 778

BTH 300 NATURAL/

PROPANE

300,000 96% 130 U.S. Gals. GPH 1164 873 699 582 499 436 388 349 318 291 269 250

88 492 Litres LPH 4406 3304 2644 2203 1888 1652 1469 1322 1201 1102 1017 945

BTH 400 NATURAL/

PROPANE

399,900 96% 130 U.S. Gals. GPH 1552 1164 931 776 665 582 517 465 423 388 359 332

117 492 Litres LPH 5875 4406 3525 2938 2518 2203 1958 1759 1602 1469 1356 1259

BTH 500 NATURAL/

PROPANE

499,900 95% 130 U.S. Gals. GPH 1919 1439 1151 959 822 720 640 576 523 480 443 411

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.

RECOVERY CAPACITY

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.

.A.S.UnidetnirP

July 2007R

December 2007R