2414 HOYT AVE 2017-11-27 - Laserfiche WebLink

WATER HEATERS 504.4 Pressure-Limiting Devices.A water heater instal- appliance has been tested, inspected and meets the require- lation shall be provided with overpressure protection by ments of the applicable standards or code. means of an approved, listed device installed in accordance 505.4.1 Single-Wall Heat Exchanger. An indirect- with the terms of its listing and the manufacturer's installation fired water heater that incorporates a single-wall heat instructions. exchanger shall be in accordance with the following 504.5 Temperature-Limiting Devices. A water heater requirements: installation or a hot water storage vessel installation shall be (1) The heat transfer medium shall be either potable provided with overtemperature protection by means of an water or contain fluids recognized as safe by the approved,listed device installed in accordance with the terms Food and Drug Administration(FDA)as food grade. of its listing and the manufacturer's installation instructions. (2) Bear a label with the word"Caution,"followed by 504.6 Temperature, Pressure, and Vacuum Relief the following statements: I Devices. Temperature,pressure, and vacuum relief devices (a) The heat-transfer medium shall be potable I or combinations thereof, and automatic gas shutoff devices, water or other nontoxic fluid recognized as safe shall be installed in accordance with the terms of their listings by the FDA. and the manufacturer's installation instructions.A shutoff valve (b) The maximum operating pressure of the heat shall not be placed between the relief valve and the water heater exchanger shall not exceed the maximum oper- or on discharge pipes between such valves and the atmosphere. ating pressure of the potable water supply. The hourly British thermal units(Btu)(kWh)discharge capac • - ity or the rated steam relief capacity of the device shall be not (3) The word"Caution" and the statements in letters less than the input rating of the water heater. shall have an uppercase height of not less than 0.120 of an inch(3.048 mm).The vertical spacing between 505.0 Oil-Burning and Other Water Heaters. lines of type shall be not less than 0.046 of an inch (1.168 mm). Lowercase letters shall be compatible 505.1 Water Heaters. Water heaters deriving heat from with the uppercase letter size specification. fuels or types of energy other than gas shall be constructed I and installed in accordance with the approved standards ref- 506.0 Air for Combustion and Ventilation. I erenced in Table 501.1(2), Section 505.3, or Section 505.4. Vents or chimneys for such appliances shall be approved 506.1 General.Air for combustion, ventilation, and dilu types.An adequate supply of air for combustion and for ade- tion of flue gases for appliances installed in buildings shall quate ventilation of heater rooms or compartments shall be be obtained by application of one of the methods covered in provided.Each such appliance shall be installed in a location Section 506.2 through Section 506.7.3. Where the require approved by the Authority Having Jurisdiction and local and ments of Section 506.2 are not met,outdoor air shall be intro state fire prevention agencies. duced in accordance with methods covered in Section 506.4 505.2 Safety Devices. Storage-type water heaters and hot through Section 506.7.3. water boilers deriving heat from fuels or types of energy other Exception: This provision shall not apply to direct-vent than gas, shall be provided with, in addition to the primary appliances. [NFPA 54:9.3.1.1] temperature controls, an overtemperature safety protection 506.1.1 Other Types of Appliances.Appliances of device constructed, listed, and installed in accordance with other than natural draft design and other than Category I nationally recognized applicable standards for such devices vented appliances shall be provided with combustion, and a combination temperature and pressure-relief valve. ventilation,and dilution air in accordance with the appli- 505.3 Oil-Fired Water Heaters. Oil-fired water heaters ance manufacturer's instructions. [NEPA 54:9.3.1.2] shall be installed in accordance with NFPA 31. 506.1.2 Draft Hood and Regulators.Where used,a 505.4 Indirect-Fired Water Heaters. Indirect-fired water draft hood or a barometric draft regulator shall be heaters shall comply with the applicable sections of the ASME installed in the same room or enclosure as the appliance served so as to prevent a difference in pressure between IBoiler and Pressure Vessel Code,or to one of the other appli- cable standards shown in Table 501.1(2). Each water heater the hood or regulator and the combustion air supply. shall bear a label in accordance withASME requirements,or an [NFPA 54:9.3.1.4] approved testing agency,certifying and attesting that such an 506.1.3 Makeup Air.Where exhaust fans,clothes dry- ers, and kitchen ventilation systems interfere with the TABLE 501.1(2) operation of appliances, makeup air shall be provided. 1 WATER HEATERS [NFPA 54:9.3.1.5] TYPE STANDARD 506.2 Indoor Combustion Air. The required volume of Electric,Household UL 174 indoor air shall be determined in accordance with Section Oil Fired Storage Tank UL 732 506.2.1 or Section 506.2.2,except that where the air infiltration Gas,75 000 Btu/h or less CSA 221.10.1 rate is known to be less than 0.40 ACH(air change per hour), Gas,Above 75 000 Btu/h CSA 221.10.3 Section 506.2.2 shall be used.The total required volume shall Electric,Commercial UL 1453 be the sum of the required volume calculated for appliances Solid Fuel -- UL 2523 — located within the space.Rooms communicating directly with For SI units: 1000 British thermal units per hour=0.293 kW the space in which the appliances are installed through open- ings not furnished with doors, and through combustion air ja 2015 UNIFORM PLUMBING CODE .,