City of Spokane

Spokane Municipal Code

***Note: Many local criminal codes can now be located under Chapter 10.60 SMC while others are now cited under the Revised Code of Washington (RCW), which was incorporated into the municipal code in 2022. (See SMC 10.58.010). Code Enforcement, including Noise Control and Animal Regulations are located in Chapters 10.62 through 10.74.

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Title 17F
Chapter 17F.030
Section 17F.030.090
 

Title 17F Construction Standards

Chapter 17F.030 Boiler and Pressure Vessel Code

Section 17F.030.090 Control and Limit Devices
  1. All automatically fired steam, vapor, or hot water boilers having a constant attendant who has no other duties while the boiler is in operation, installed prior to June 1989, shall be:
    1. Equipped with:
      1. An automatic low-water fuel cutoff; and
      1. An automatic water-feeding device; and
    1. Designed so that they may be readily tested at frequent intervals. (Reference WAC 296-104-300).
  1. All automatically-fired boilers installed after June 1998 shall have those requirements listed in subsection (A) above. The following are also required:
    1. All boilers that are automatically-fired low-pressure steam-heating boilers, small power boilers, and power steam boilers without a constant attendant who has no other duties shall be equipped with:
      1. Two high-steam pressure-limit controls, the highest of which shall be provided with a manual reset;
      1. Two low-water fuel cutoffs, one of which will be provided with a manual rest device and independent of the feed water controller;
      1. Coil type flash-steam boilers may use two high-temperature limit controls, one of which shall have a manual reset. This is instead of the low-water fuel cutoff;
      1. All control and limit devices shall be independently connected and electrically wired in series.
    1. All automatically-fired hot-water supply, low-pressure hot-water heating boilers and power hot-water boilers shall be equipped with:
      1. Two high-temperature limit controls, the highest of which shall be provided with a manual reset;
      1. One low-water fuel cutoff with manual reset and independent of the feed-water controller;
      1. For coil type hot-water boilers, a low-water flow-limit control installed in the circulating waterline may be used instead of the low-water fuel cutoff;
      1. All control and limit devices shall be independently connected and electrically wired in series. (Reference WAC 296-104-301)
  1. All automatically-fired boilers installed or refitted after December 1989 shall be equipped with items required in subsection (B) above. The following are also required with regard to installations or refits of gas, oil, or combinations of gas or oil:
    1. All boilers installed or refitted after December 1998 with in excess of four hundred thousand BTUs per hour, which are fired by gas, oil, or a combination of gas or oil, shall comply with the standards of WAC 296-104-302 and as periodically revised and updated.
    1. Verification of fuel train compliance and safety operations of a boiler/pressure vessel shall be documented on an “installer’s report” on a nationally recognized format, signed by the installer/tester certifying the start-up upon completion. Such report shall remain with the boiler/pressure vessel, and in the possession of the owner at all times. The report must be available to the inspecting agency. (Reference CSD-1 part CF.)
    1. For boiler/pressure vessels which are fired by gas or a gas-oil combination installed or refitted after July 1, 2010, the maximum allowable pressure drop for gas to the unit regulator shall be ten percent for two-pound psig service pressure and one-half inch water column for seven-inch water column service pressure. This standard shall apply to all gas piping from the utility service to the boiler/pressure vessel served.
  1. All automatically-fired boilers installed or refitted after December 2004 shall be equipped with the items required in subsection (C) above. The following are also required with regard to installations or refits of gas, oil, or combinations of gas or oil:
    1. All automatically fired boilers with input greater than four hundred thousand Btu/hr, including electric boilers with input greater than one hundred seventeen kw shall have a manually-operated remote shutdown switch or circuit breaker. The shutdown switch shall be located just outside the boiler room door and marked for easy identification. Consideration shall be given to the type and location of the switch to safeguard against tampering. If the boiler is on the building exterior, the switch shall be located just inside the door. If there is more than one door to the boiler room, there shall be a switch provided at each door.
    1. A means shall be provided for testing the operation of hot-water heating boiler low-water cutoff(s) without resorting to draining the entire system. Such means shall not render the device(s) inoperable. If the means temporarily isolate the device from the boiler during testing, it shall automatically return to its normal position. (Reference WAC 296-104-303)
  1. No person may operate a hot-water heating boiler unless equipped with a low-water fuel cutout of a rated working pressure equal to the maximum working pressure of the boiler, and located at or above the lowest safe water level.

Date Passed: Monday, June 24, 2013

Effective Date: Monday, July 1, 2013

ORD C34995 Section 4