Page 1
BTH-120
through
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
BTH-500
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
December 2007R
July 2007R
Rule 1146.2 Low NOx for
Approved,
California and Texas
BTH-120-250
BTH-300-500
Page 1 of 4
ACGSS02407
Page 2
UP TO 96% THERMAL EFFICIENCY,DIRECT VENT
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
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
BTH-120 - 300 vent kit p/n 9003910105
BTH-400 - 500 vent kit p/n 9006144005
ge moisture-laden air (such as clothes dryers). This will help prevent
oof penetrations.
Page 2 of 4
ACGSS02407
Page 3
BTH-120-250
WATER OUTLET
1 1/2˝ NPT
A
B
BTH-300-500
G
INSTALLATION CLEARANCES
Sides 0˝
Front 0˝
Rear 0˝
Top 1.5˝
To Combustibles* 0˝
• Approved for combustible floors
D
F
GAS VALVE PIPING
E
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
C
MAXIMUM EQUIVALENT
VENT LENGTH:
BTH-
using 3˝ pipe:
120 – 250
BTH-
using 4˝ pipe:
120 – 250
BTH-
300 – 500
BTH-
using 3˝ pipe:
not applicable
using 4˝ pipe:
300 – 500
50 ft.
120 ft.
70 ft.
DIMENSIONS AND SHIPPING WEIGHTS
MODEL
BTH-120
BTH-150
BTH-199, 250
BTH-300, 400, 500
Water connections: 1-1/2˝
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
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
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
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
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
DIMENSIONS
SHIP WEIGHT
STD
SHIP WEIGHT
ASME
Page 3 of 4
ACGSS02407
Page 4
UP TO 96% THERMAL EFFICIENCY,DIRECT VENT
RECOVERY CAPACITY
U.S. Gallons/Hr and Litres/Hr at TEMPERATURE RISE INDICATED
MODEL
BTH 120
BTH 150
BTH 199
BTH 250
BTH 300
BTH 400
BTH 500
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.
TYPE OF
GAS
NATURAL/
PROPANE
NATURAL/
PROPANE
NATURAL/
PROPANE
NATURAL/
PROPANE
NATURAL/
PROPANE
NATURAL/
PROPANE
NATURAL/
PROPANE
INPUT
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
120,000
150,000
199,900
250,000
300,000
399,900
499,900
Thermal
Efficiency
95%
35 227 Litres LPH 1744 1308 1046 872 747 654 581 523 476 436 402 374
95%
44 379 Litres LPH 2179 1635 1308 1090 934 817 726 654 594 545 503 467
95%
58 379 Litres LPH 2904 2178 1743 1452 1245 1089 968 871 792 726 670 622
95%
73 379 Litres LPH 3632 2724 2179 1816 1557 1362 1211 1044 991 908 838 778
96%
88 492 Litres LPH 4406 3304 2644 2203 1888 1652 1469 1322 1201 1102 1017 945
96%
117 492 Litres LPH 5875 4406 3525 2938 2518 2203 1958 1759 1602 1469 1356 1259
95%
146 492 Litres LPH 7263 5447 4358 3631 3113 2724 2421 2179 1981 1816 1676 1556
Approx.
Capacity
60 U.S. Gal GPH 461 345 276 230 197 173 154 138 126 115 106 99
100 U.S. Gals. GPH 576 432 345 288 247 216 192 173 157 144 133 123
100 U.S. Gals. GPH 767 575 460 384 329 288 256 230 209 192 177 164
100 U.S. Gals. GPH 960 720 576 480 411 360 320 288 262 240 221 206
130 U.S. Gals. GPH 1164 873 699 582 499 436 388 349 318 291 269 250
130 U.S. Gals. GPH 1552 1164 931 776 665 582 517 465 423 388 359 332
130 U.S. Gals. GPH 1919 1439 1151 959 822 720 640 576 523 480 443 411
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
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.
December 2007R
July 2007R
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
.A.S.UnidetnirP
ACGSS02407
Loading...