A.O. Smith BTH-120 through BTH-500 - Manual (Page 2)

ACGSS02407
Page 2 of 4
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 discharge 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/roof penetrations.
BTH-120 - 300 vent kit p/n 9003910105
BTH-400 - 500 vent kit p/n 9006144005
UP TO 96% THERMAL EFFICIENCY,DIRECT VENT
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