A.O. Smith ACGSS02407 User Manual

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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-edgeengineering delivers conventionalpower-ventor sealed combustion powerdirect-ventversatility, low NOx emissions and excellentspace-savingcharacteristics. 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-indiagnostics

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-sidesurface, which can reduce energy efficiency over time

POWERED ANODES STANDARD ON ALL MODELS

Provides long-lastingtank protection in varying water conditions

Does not require maintenance or inspection

PERMAGLAS® ULTRA COATGLASS 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-ventingor sealed combustion direct venting

Vents vertically or through sidewall

Direct-ventintake 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-MIXPOWERED BURNER

Down-firedpre-mixburner provides optimum efficiency and quiet operation

Top-mountedburner position prevents condensation from affecting burner operation

BTH-120throughBTH-500

Approved, Rule 1146.2 Low NOx for California and Texas

BTH-120-250

BTH-300-500

Page 1 of 4

ACGSS02407

JulyDecember2007R 2007R

UP TO 96% THERMAL EFFICIENCY,DIRECT VENT

OTHER CYCLONE Xi FEATURES

SPACE-SAVINGDESIGN 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-INSTALLEDTEMPERATURE AND PRESSURE RELIEF VALVE

MAXIMUM HYDROSTATIC WORKING PRESSURE: 160 PSI

HANDHOLE CLEANOUT

Allows easy access to tank interior for cleaning

CODES AND STANDARDS

•Design-certifiedby UL (Underwriters Laboratories) International, according toANSZ21.10.3-CSA4.3standards governingstorage-typewater heaters

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

Meets SCAQMD Rule 1146.2 for low-NOxemissions

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

THREE-YEARLIMITED 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 discharge moisture-ladenair (such as clothes dryers). This will help preventfreeze-overof 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/roof penetrations. BTH-120- 300 vent kit p/n 9003910105

BTH-400- 500 vent kit p/n 9006144005

Page 2 of 4

ACGSS02407

BTH-120-250

WATER OUTLET

1 1/2˝ NPT

A

B

G D

C

BTH-300-500

E

F

 

 

 

 

 

INSTALLATION CLEARANCES

 

 

 

GAS VALVE PIPING

 

 

 

MAXIMUM EQUIVALENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VENT LENGTH:

 

 

 

 

 

Sides

 

 

 

 

BTH-120

 

1/2˝ NPT

 

 

 

BTH-

 

using 3˝ pipe:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Front

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-150

 

3/4˝ NPT

 

 

120 – 250

 

50 ft.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rear

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-199

 

3/4˝ NPT

 

 

 

BTH-

 

using 4˝ pipe:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Top

 

 

1.5˝

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-250

 

3/4˝ NPT

 

 

120 – 250

 

120 ft.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To Combustibles*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-300

 

1 1/4˝ NPT

 

 

 

BTH-

 

using 3˝ pipe:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Approved for combustible floors

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-400

 

1 1/4˝ NPT

 

 

300 – 500

not applicable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-500

 

1 1/2˝ NPT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BTH-

 

using 4˝ pipe:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

300 – 500

 

70 ft.

DIMENSIONS AND SHIPPING WEIGHTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIMENSIONS

 

 

 

 

 

 

 

 

 

 

 

SHIP WEIGHT

 

SHIP WEIGHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODEL

 

A

B

C

 

D

 

 

E

 

F

 

 

G

STD

 

ASME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Water connections: 1-1/2˝

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 3 of 4

ACGSS02407

 

 

 

 

 

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.

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

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 300-50010"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-linedsteel tank construction, with glass lining applied to allwater-sidesurfaces after the tank has been assembled and welded; 2. Have aspiral-shapedheat exchanger placed entirely inside the tank, which shall beglass-linedto protect against acidic flue gas condensate; 3. Have foam insulation and anASME-ratedtemperature and pressure relief valve; 4. Have adown-firedpower burner designed for precise mixing of air and gas for optimum efficiency, requiring no special calibration onstart-up;5. Be approvedfor 0˝ clearance to combustibles.

Heater shall be supplied with maintenance-freepowered anode.

The control shall be an integrated solid-statetemperature 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-certifiedby UL (Underwriters Laboratories), according to ANSZ21.10 standardsgoverningstorage-typewater heaters; 2. Meet ASHRAE/IESNA90.1-1999;3. Bedesign-certifiedby Underwriters Laboratories for 180° F (62° C) water; 4. Meet SCAQMD Rule 1146.2 forlow-NOxemissions.

For conventional-vent specification: TheBTH-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: TheBTH-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 combustiondirect-ventusing 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

Printed in U.S.A.