HAR §12-223.1-8. connected that it shall be easily readable

The thermometer shall be so located that it shall always indicate the temperature of the water in the water heater at or near the outlet; and (4) Flow-sensing device: potable water heaters requiring forced circulation to prevent overheating of the tubes, coils, or vessel should have an acceptable flow-sensing device or temperature-sensing device to prevent burner operation at a flow rate inadequate to protect the water heater unit against overheating at all allowable firing rates. This safety controls shall shut down the burner and prevent restarting until an adequate flow is restored and shall be independent of all other controls. [Eff and comp 12/21/19; am and comp SEP - 8 2024 ] (Auth: HRS §397-4) (Imp: HRS §397-4) ### 12-223.1-8 Modular steam heating, modular hot-water heating boilers, and modular water heaters. (a) Individual modules. The following shall apply to individual modules: (1) The individual modules shall comply with all the requirements of the code of construction and this subsection. The individual modules shall be limited to a maximum input of 400,000 Btu per hour (117 kw/hr) for gas, 3 gallons/hour (11.4 l/hr) for oil, or 117 kw for electricity; (2) Each module of a modular steam heating boiler shall be equipped with a: - (A) Safety valve, see section 12-223.1-9(a)(1); - (B) Blowoff valve, see section 12-223.1-13(o)(1); and - (C) Drain valve, see section 12-223.1-13(o)(2); and 223.1-20 3559 §12-223.1-8 (3) Each module of a modular hot-water heating boiler shall be equipped with a: (A) Safety relief valve, see section 12-223.1-9(a)(2); and (B) Drain valve, see section 12-223.1-13(o)(2). (b) Assembled Modular Heating boilers. The following shall apply to assembled modular heating boilers: (1) The individual modules shall be manifolded together at the job site without any intervening valves; (2) The assembled modular steam heating boiler shall also be equipped with a: (A) Feedwater connection, see Exhibit 5, titled, "Steam Boilers in Battery - Pumped Return Acceptable Piping Installation", dated October 1, 2023, which is made a part of this chapter and located at the end of this chapter, and Exhibit 6, titled, "Steam Boilers in Battery - Gravity Return Acceptable Piping Installation", dated October 1, 2023, which is made a part of this chapter and located at the end of this chapter; and (B) Return pipe connection, see Exhibit 5, titled, "Steam Boilers in Battery - Pumped Return Acceptable Piping Installation", dated October 1, 2023, which is made a part of this chapter and located at the end of this chapter, and 6, titled, "Steam Boilers in Battery - Gravity Return Acceptable Piping Installation", dated October 1, 2023, which is made a part of this chapter and located at the end of this chapter; and (3) The assembled modular hot-water boiler shall also be equipped with a: (A) Makeup water connection, see Exhibit 7, titled, "Hot Water Boilers in Battery Acceptable Piping Installation", dated October 1, 2023, which is made a part of 223.1-21 3 5 5 9 §12-223.1-8 this chapter and located at the end of this chapter; (B) Provision for thermal expansion, see Exhibit 7, titled, "Hot Water Boilers in Battery Acceptable Piping Installation", dated October 1, 2023, which is made a part of this chapter and located at the end of this chapter, and Exhibit 8, titled, "Expansion Tank Capacities for Gravity Hot-Water Systems", dated October 1, 2023, which is made a part of this chapter and located at the end of this chapter; and (C) Stop valves (treating the assembled modular boiler as a single unit), see Exhibit 7, titled, "Hot Water Boilers in Battery Acceptable Piping Installation", dated October 1, 2023, which is made a part of this chapter and located at the end of this chapter. (c) Modular hot-water heating boilers. The following shall apply to modular hot-water heating boilers: (1) Each module of a modular hot-water heating boiler shall be equipped with a: (A) Pressure or altitude gage, see section 12-223.1-7(b)(1); (B) Thermometer, see section 12-223.1-7(b)(2); and (C) Temperature control, see section 12-223.1-7(b)(3)(A); and (2) The assembled modular hot-water heating boiler shall be equipped with a: (A) Temperature control, see 12-223.1-7(b)(3)(B); and (B) Low-water fuel cutoff, see 12-223.1-7(b)(4). (d) Modular steam heating boilers. The following shall apply to modular steam heating boilers: (1) Each module of a modular steam boiler shall be equipped with a: (A) Steam gage, see section 12-223.1-7(a)(1); 223.1-22 3559