05/15/15 DESIGN NO. _____ SECTION 15592 FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) PART 1 - GENERAL 1.01 DESCRIPTION OF WORK A. 20 1.02 COMMISSIONING REQUIRMENTS A. 28 1.03 1.04 1 Provide equipment required for the installation of a complete system for the burning of natural gas or No. 2 fuel oil and for the pumping of No. 2 fuel oil. Product specific requirements are contained herein; Section 15501, General Provisions for Heating, Ventilating and Air Conditioning Work, shall be referred to for general requirements. HVAC Contractor shall comply with the Commissioning Requirements of Contract Specification Section S01660. RELATED SECTIONS A. Division 1 Sections (General Requirements) B. Divisions 2 to 9 Sections C. Division 15 Sections D. Division 16 Sections SUPPLEMENTAL SUBMITTALS Burner submittals will be submitted with the boiler package; only transfer pump submittals and submittals for other appurtenances defined herein are to be submitted for new projects under this Section; for burner replacement projects, submit complete burner system details in addition to submissions for appurtenances defined herein. A. Product Data 1. NYCSCA Provide manufacturers product data indicating capacities of equipment. Include all equipment installation instructions. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 1 05/15/15 B. DESIGN NO. _____ Shop Drawings 1. C. Test Report: 1. D. Wiring Diagrams: Submit manufacturer's electrical requirements for power supply wiring to boilers/burners and transfer pumps. Submit manufacturer's wiring diagrams for interlock and control wiring required for final installation of boilers/burners, transfer pumps & controls. Clearly differentiate between portions of wiring that are factory-installed and portions to be fieldinstalled. Boiler/burner and pump drawings shall show interface with all external controls necessary for a complete installation. Submit field test and inspection reports prior to placing the burner in operation. Certificates 1. DEP Permit: Provide for boilers with fuel input equaling or exceeding 2,800,000 BTUH. 2. Burner UL Listing: Submit UL 726 listing for oil burning boilers, UL 795 (or ANSI Z21.13) listing for gas burning boilers, UL 726 and UL 795 (or ANSI Z21.13) listings for boilers with dual fuel burners. Per DEP requirements effective Feb. 17, 2014, it is permissible that a new burner be listed by UL, CSA Group, ETL, or any other national recognized testing laboratory that uses UL testing conditions and have their Listing Mark label. 3. DEP Certification of Compliance: Verification of meeting DEP Assembled Equipment Acceptance Requirements per DEP Rules Effective Feb. 17, 2014: (on DEP’s list of accepted equipment; or UL, CSA Group or ETL Listed with Contractor’s Professional Engineer’s Certification of Compliance; or Unlisted Custom equipment with Contractor’s Professional Engineer’s Certification of Compliance). 4. DEP Certificate of Operation, or Certificate of Registration if applicable: a. NYCSCA Boilers with fuel input equaling or exceeding 2,800,000 BTUH: At the completion of the burning system installation Work, obtain a "Certificate of Operation" from the Department FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 2 05/15/15 DESIGN NO. _____ of Environmental Protection (Air Resources) and deliver this Certificate of Operation to the Authority before the request for final payment is made. Certificate shall name the Department of Education as the owner. b. 5. E. NYCSCA Contractor’s affidavit. start-up and demonstration Contract Closeout Submittals: 1. Submit operating instruction manuals, complete with schematic wiring and piping diagrams, for the boiler/burner units and all combustion and operating controls. 2. Piping and Wiring Diagram: Provide “As Built” wiring diagram and piping layout of the oil or gas for the boiler/burner or burner system. The diagram and layout shall be framed and mounted where directed in the Boiler Room. Frame shall be of aluminum satin finish, with one side of frame removable and with a plywood backing. Provide safety glass in the front. All parts of the installation shall be indicated exactly as installed and shall be properly identified. Valve identification numbers shall agree with valve tags of Section 15502: HVAC Identification and all piping shall be clearly shown and labeled. 3. Maintenance Data: Submit maintenance data and parts list for each burner, control, accessory and pumps; including "trouble-shooting" in the maintenance guide. 20 20 Projects with boilers with fuel input less than 2,800,000 BTUH but greater than or equal to 350,000 BTUH: Must be registered with the DEP. Deliver this Certificate of Registration to the Authority before the request for final payment is made. Registrations shall name the Department of Education as the owner. F. Maintenance Materials G. Provide a set of Manufacturer’s guarantees for each burner, transfer pump, and other fuel burning appurtenances. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 3 05/15/15 1.05 DESIGN NO. _____ SUPPLEMENTAL QUALITY A. Codes and Standards 1. NFPA Compliance: Install oil-fired burners in accordance with NFPA Standard 31-2001: Standard for the Installation of Oil Burning Equipment and related NYC Mechanical Code Amendments. 2. NFPA Compliance: Install oil-fired burners in accordance with NFPA Standard 8501-1997: Standard for Single Burner Boiler operation and related NYC Mechanical Code Amendments. 3. NFPA Compliance: Install gas-fired burners in accordance with NFPA Code 54-2006: National Fuel Gas Code and related NYC Fuel Gas Code Amendments. 4. ASME CSD-1-2004 Compliance: Install gas fired burner’s gas and oil train piping in full accordance with ASME CSD-1-2004 requirements. 5. All appliances regulated by the New York City Construction Codes shall be listed and labeled (reference Sections MC 301.4 and MC 301.6 of the 2014 NYC Mechanical Code). Testing of material shall be in accordance with Section §28-113 of the NYC Administrative Code (reference Section MC 301.5). Whenever the NYC Construction Codes or the Rules of the Department of Buildings requires that material be listed or labeled and material proposed to be used is not so listed or labeled, the use of such material shall be subject to prior approval by the Commissioner (Office of Technical Certification and Research OTCR) and such material shall be used only to the extent set forth in such approval. Materials that were previously approved by the Board of Standards and Appeal (BSA) or by the Department (MEA) before the effective date of the NYC Construction Codes may continue to be used, but only to the extent set forth in such approval, and only if such approval is not specifically amended or repealed by the Commissioner. 20 20 NYCSCA ASSURANCE B. System shall be arranged for lead/lag operation as per code requirements. sequential C. Fuel burning equipment shall be designed to operate satisfactorily and efficiently without objectionable smoke, odor, or noise. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 4 05/15/15 DESIGN NO. _____ D. Special Inspections are required on any installation of fresh air louvers, dampers, fresh air fans, fuel oil piping, fuel burners, gas piping, boilers, and all other items and accessories, in accordance with the requirements of New York City Construction Codes. E. At the completion of the Work, file all necessary final applications and relevant papers, Drawings, Amendments, and all other items and accessories and secure for the Authority, a Certificate of Operation or Registration (as applicable) from the NYC Bureau of Air Resources and the NYS Department of Environmental Conservation for the burning system and all the approvals from the Building Department and the Bureau of Electrical Control. Submit with the request for final payment proof of filing for an inspection certificate from the Bureau of Electrical Control and a certificate of satisfaction from the Building Department. Acceptable evidence of filing with the Bureau of Electrical Control will be the job posting card issued by the Bureau. F. Contractor is responsible for any and all fees assessed by the NYC Bureau of Air Resources for inspection and/or cancellation if the initial BAR inspection fails to result in the issuance of the Certificate of Operation (as applicable) for the installation. G. Certificates of approval issued by the Building Department (CID), Department of Health, Department of Water Resources, Bureau of Electrical Control, Fire Department, Department of Air Resources, Department of Highways, and all other departments having jurisdiction in connection with this Work shall be submitted before final payment is made. H. Contractor shall register, file applications and obtain all related permits, certifications and approvals required by all agencies including but not limited to: 20 22 NYCSCA 1. Plumbing Inspection - sign off (DOB/CID). 2. Certificate of approval Installation - (DOB/CID). 3. Bureau of Electrical Controls. (DOB/BEC). for Fuel Oil Burner FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 5 05/15/15 DESIGN NO. _____ 4. STATIONARY COMBUSTION INSTALLATION - Application/ Permit New York State Department of Environmental Conservation (D.E.C.). 5. APPLICATION FOR CERTIFICATE OF OPERATION (as applicable) OF FUEL BURNING EQUIPMENT, Air Resources (B.A.R.) Tests, Inspection and Certificate of Operation (as applicable) - NYC Department of Environmental Protection (DEP). 6. Coordination, inspection and Natural Gas Utility Company. 7. DEP Certificate of Compliance approval by the I. Before submitting any equipment shop drawings for approval, the HVAC Contractor, Automatic Temperature Controls Contractor and the Equipment Vendor and Manufacturer shall coordinate the controls required for the system. 20 J. Per Section MC 1303.1, joints and connections shall be approved and of a type approved for fuel-oil piping systems. All threaded joints and connections shall be made tight with suitable lubricant or pipe compound. Pipe joint compounds and thread seal tape that utilize Teflon (PTFE) shall be approved for usage on fuel oil lines. Per Section FGC 403.9.3 of the NYC Fuel Gas Code, joints and connections shall be approved and of a type approved for natural gas piping systems. All threaded joints and connections shall be made tight with suitable lubricant or pipe compound. Pipe joint compounds and thread seal tape that utilize Teflon (PTFE) shall be approved for usage on natural gas lines. 22 1.06 MAINTENANCE MATERIALS A. 1.07 WARRANTY A. NYCSCA Furnish spare Hydramotor fuel safety shut-off valve set, one per each boiler. Burner guarantee shall be for two years. All other guarantees shall be for one year. All guarantee periods shall start at Substantial Completion. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 6 05/15/15 DESIGN NO. _____ PART 2 - PRODUCTS 2.01 2 MANUFACTURERS A. If burners are provided with the boilers: burners shall be provided by the same manufacturer as the boilers. Refer to the following Sections: Section 15555: Fire-Tube Boilers (Steam) Section 15556: Cast-Iron Boilers Section 15559: Flexible Water-Tube Boilers (Steam) Boiler Manufacturer shall select burners that comply with the specifications and best match the boilers. B. Burner Replacement Projects: as follows: 1. 2. 3. 4. 5. 11 2.02 20 Webster Industrial Combustion S. T. Johnson Profire (Cleaver Brooks) Power Flame BOILER BURNER A. NYCSCA Approved manufacturers are The gas fuel burning system shall be compliant with ASME CSD-1-2004 for the following features (including but not limited to) (based on fuel input rates as applicable): 1. Manual shutoff valves 2. Pilot flame and main flame establishing periods 3. Flame failure response time 4. Valve closing time 5. Action to be taken on pilot or main flame failure 6. Fuel pressure supervision 7. Pilot and main gas regulators 8. Pressure test ports FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 7 05/15/15 DESIGN NO. _____ 9. Gas pressure regulator venting limiters or hard piped vents) (integral vent 10. Low and high gas pressure switches and their venting (integral vent limiters or hard piped vents) 11. Number of automatic safety shut off valves 12. Proof of Closure requirements 13. Action on power or control input interruption after safety shutdown and lockout 14. Proven low fire start 15. Action on loss of combustion air 16. Gas pressure relieving devices 17. Manual leak testing valves for safety shut off valves 18. Manifolding of any hard piped vent lines 19. Pre and post purge durations 20. Automatic ignition devices 21. Sequencing of components on both pilot and main gas trains All controls and safety devices covered by ASME CSD-1 shall be accepted and listed for the intended service by a nationally recognized testing agency, such as, but not limited to CSA, FM, or UL. Provide gas filters/strainers, drips and sediment traps as indicated in ASME CSD-1-2004. B. NYCSCA The oil fuel burning system shall be compliant with ASME CSD-1-2004 for the following features (including but not limited to) (based on fuel input rates as applicable): 1. Fuel pump piping 2. Pilot flame and main flame establishing periods 3. Flame failure response time FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 8 05/15/15 DESIGN NO. _____ 4. Valve closing time 5. Action to be taken on pilot or main flame failure 6. Fuel pressure supervision 7. Regulators and venting 8. Pressure test ports 9. Number of automatic safety shut off valves 10. Proven low fire start 11. Action on loss of combustion air 12. Shutoff valve and/or pressure relief valve 13. Pre and post purge durations 14. Atomizing media supply pressure interlock switch 15. Oil pressure interlock switch 16. Automatic ignition devices 17. Sequencing of components on both pilot gas and main oil trains All controls and safety devices covered by ASME CSD-1 shall be accepted and listed for the intended service by a nationally recognized testing agency, such as, but not limited to CSA, FM, or UL. Provide oil strainers as indicated in ASME CSD-1-2004. C. Each burner shall be arranged for single fuel operation of No. 2 oil or natural gas. Adjust burner and controls so that combustion efficiency is maintained automatically at the minimum efficiency values indicated in Specification Sections 15555, 15556, and 15559 over the entire range of modulation of No. 2 fuel oil or natural gas. D. Pressure Atomizing: Each burner shall be of pressure atomizing forced draft design and be capable of firing the specified boiler to its rated input capacity for No. 2 fuel oil. Burner shall be capable of producing a continuous stable flame, through a minimum 2 to 1 turn- 26 10 22 3 NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 9 05/15/15 DESIGN NO. _____ down ratio in firing rate without changing tips or making other manual adjustment from high fire position to low fire. The burner shall include stainless steel atomizing guns. 10 E. Air Atomizing: Each burner shall be an air atomizing forced draft combustion system. The burner shall be capable of firing the specified boiler at its rated input capacity for No. 2 fuel oil. Burner shall be of the full modulation type with a turndown ratio of 3:1 or better from high fire position to low fire. F. Burner shall be of the high static forced draft type. All of the combustion air shall be provided by an integral blower of the forward curved type, direct drive 3540 rpm, 208 volt or 460V, 60 Hz, 3 phase motor. The blower fan shall be mounted directly on the blower motor shaft and the entire assembly shall be removable as a single unit through the motor side of the burner. The burner shall be steel of the all welded construction and shall have a stainless steel flame retention firing head. The burner shall be equipped with twin combustion air inlet shutter dampers with nylon bearings for smooth and repeatable operation of the dampers. G. Burner shall be provided with a gas spark ignition pilot. Pilot piping shall have a factory installed shut off cock, "Y" strainer and gas pressure regulator. Provide the following as required by ASME CSD-1-2004: solenoid pilot safety shut-off valve(s), gas pressure switch(s) and plugged leakage test connections. Provide a lubricated plug cock in the field piping directly before the pilot piping. Provide a "Y" strainer after the lubricated plug cock. Transformers, relays, switches and other accessories required to make the burner systems operative shall be provided. Refer to Plumbing (15416) for venting of pilot piping. H. Burner Oil System 5 22 7 4 22 NYCSCA 1. The fuel oil firing system of the burner shall be a single nozzle air atomizing system or a mechanical high pressure atomizing design using simplex nozzles capable of effectively atomizing No. 2 fuel oil. The burner fuel oil train shall be factory installed and shall include: one (1) 2 way direct acting normally closed fuel oil safety solenoid shut off valve, one (1) 2 way normally closed fuel oil hydramotor safety shut-off valve with one (1) FM proof of closure switch similar to ASCO/General FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 10 05/15/15 DESIGN NO. _____ Controls HOV1 safety shut-off valve, fuel oil valve discharge spring loaded in line check valve, fuel oil pressure regulator, fuel oil metering valve, low fuel oil pressure switch, fuel oil pressure gauge, fuel oil return solenoid valve, oil relief valves, check valves, and Y-type bronze 100 mesh strainer upstream of both fuel oil safety shut off valves. Provide all burner assemblies with antidrip nozzles to retain oil contained in the oil piping and nozzle upon the closing of the main shut-off valve and safety shut-off valves or other approved by the Authority method that can perform the same function. I. 22 5 J. 2. Fuel oil piping to each burner must include one(1) 2 way normally closed hydramotor safety shut-off valve with one (1) FM proof of closure switch, ASCO/General Controls HOV1 SAFETY SHUT-OFF VALVE. 3. Hydramotor safety shut off valve must be installed in accordance with recommendations of the manufacturer and must allow easy viewing of the OPEN - SHUT view window from a standing position in front of the boiler. Burner Oil Pump 1. Fuel oil shall be delivered to the burner nozzle by a positive displacement fuel oil pump mounted integrally as part of the burner assembly or conveniently located pump set near the burner. The burner oil pump shall include the following: Fuel oil pumps and motors with built in pressure regulator, fuel oil simplex strainer (100 mesh basket), fuel oil strainer suction inlet compound gauge, and fuel oil strainer outlet compound gauge, fuel oil pump discharge pressure gauge, oil safety valves. 2. All pressure gauges shall be liquid filled and fitted with pulsation dampers and shut off cocks. Atomizing Air Compressor: 1. 22 NYCSCA The burner shall include a factory assembled, mounted atomizing air compressor set to provide atomizing air for the proper atomization of the fuel oil. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 11 05/15/15 11 23 K. DESIGN NO. _____ 2. The atomizing air compressor set shall include the following components: Air compressor and motor drive, low compressor oil level safety switch, air filter, pressure relief valve, bleed line with cock, pulsation tank and accumulator. 3. The atomizing air piping train shall be factory installed and shall include: Low atomizing air pressure switch, check valve, atomizing air pressure gauge 4. All pressure gauges shall be liquid filled and fitted with pulsation dampers and shut off cocks. Burner Gas System 1. The gas multiport velocity stream. type with high fire 2. Gas Train: The burner manufacturer shall provide a factory assembled and pre-wired gas train (manifold). The gas train burner manifold shall be capable of providing sufficient gas to the burner for burner operation at the full firing rate of the boiler with the required gas pressure at the inlet to the gas burner manifold. Gas train shall include the following components as required by ASME CSD-1-2004: motorized safety shut off valve(s) with proof of closure switch(s) and high and low gas pressure switches. Provide gas pressure regulator, pressure gauges at regulator inlet and outlet and burner manifold, strainers, manual gas shut off valves, and plugged test cocks. 9 8 burning components shall be of the type designed to inject many high jets of gas into the combustion air Burner shall be of the full modulation a turndown ratio of 3:1 or better from position to low fire. High and low gas pressure switches if required by ASME CSD-1, shall be vented to the atmosphere and may be connected to the appliance regulator vent on the same gas train. Cross manifolding between burners is allowed on equipment operating off the same service and pressure. Manifolded atmospheric vent lines shall be connected to a common vent line having a cross sectional area not less than the area of the largest vent plus 50 percent of the combined area of all the additional vents with allowance for length of run and fittings. NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 12 05/15/15 DESIGN NO. _____ “Ventless” gas pressure switches may be used alleviating the requirement for outside venting; however, pressure switches in this category shall be UL 353 listed and shall be equipped with an integral vent limiter in lieu of the requirement for outside venting. The utilities have accepted the following pressure switches or their equal as being “Ventless”: 1. 2. 3. 4. Antunes series LGP-G, HGP-G Honeywell series C6097 Karl Dungs series GMH, GML Siemens series QPH, QPL On elevated pressure systems of over 14" w.c., all regulators must be vented outside to the atmosphere. On services supplying 14" w.c. and less, regulators with valve bodies 1¼" and larger shall be vented outside to the atmosphere. Regulators with valve bodies smaller than 1¼" and those installed on services supplying 14” w.c. and less may be equipped with approved appliance vent limiters in lieu of outside venting. The Siemens SKP series of combination valve/regulator (with integral vent limiter) or approved equal may be utilized for their rated pressures and body sizes without outside venting. Per Section FGC 410.3, a vent to the outside is not required for regulators less than 1¼ inches NPS equipped with and labeled for utilization with approved vent-limiting devices installed in accordance with the manufacturer’s instructions. L. NYCSCA Parallel positioning control (linkage-less): The parallel positioning control with air to fuel ratio control shall include a master proportional controller (Honeywell R7999 or approved equal) with sub-base (Honeywell Q7999A or approved equal) which shall be connected to the load to sense the changes in load. The output of the controller shall transmit a signal simultaneously to the forceddraft damper(s) and fuel valve operators (Honeywell ML7999 or approved equal). A separate ratio-adjustment controller which has been calibrated for the system to prevent a fuel-rich mixture shall be utilized in the line to the fuel valve and shall vary the signal for the fuel flow proportionally to the air flow. This action shall change the fuel flow to establish the optimum air to fuel ratio. The parallel positioning control shall be capable of offsetting variations in pressure-drop characteristics FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 13 05/15/15 DESIGN NO. _____ in final control elements, fuel viscosity, air temperature, or barometric pressure. Stable burner operation shall exist when the continuous firing rate is from 25 percent to 100 percent of the maximum required firing rate. The turndown of the burner firing rate shall be made during the normal firing cycle without interruption or change of burner components. A capability for manual control shall be provided that allows a smooth transition between manual and automatic control. All controller adjustment and calibrations of fuel feed and air flow shall be made at the front of the control cabinet or panel, with flush-mounted indicators provided to show adjustments and results. Provide a Display Module (Honeywell S7999B or approved equal) to integrate with the fuel/air controller. M. Burner Controls 1. 7 Provide all the controls, including the protective and modulating flame control devices required for the safe operation of the burning equipment. Provide all the electric wiring for the burner controls. Safety devices, including pressure controls, combustion controls, relays, and all other items and accessories, shall have their electric switching mechanism connected to an ungrounded conductor or conductors. a. Controls for each burner shall include automatic gas-electric ignition with magnetic gas valve, ignition transformer, electronic flame failure programming control, safety devices, and all other items and accessories. Burners shall operate on a full modulation principal cycle, at predetermined maximum and minimum boiler pressures. Gas piping, oil piping, sensing devices, transformers, relays, switches and other accessories required to make the burner system operative, shall be provided. b. Modulating flame control mechanism for each burner shall consist of a modulating electric damper control motor(s), modulating pressure controller, metering device, and all other items and accessories, so that the air atomizing system, and combustion air dampers, and the parallel position control be actuated by the master proportional controller 20 NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 14 05/15/15 DESIGN NO. _____ (Honeywell R7999 or approved response to the heating load. c. Each system shall also be equipped with a flame failure control, low water cut-off, pressure operating control, pressure limit control, outside air intake damper control, magnetic oil valve, sequence draft control, burner smoke alarm shutdown and all other items and accessories. Solenoid Valves: Each burner shall be provided with 120-volt normally closed, packless solenoid valve in the oil supply and in the pilot gas supply. The oil valve shall be wired through an auxiliary contact of the burner motor starter and into the burner programming circuit, so that the valve will open only when the gas pilot flame has been proven and will remain open until the steam demand has been satisfied, unless flame failure occurs. The pilot gas valve shall be wired into the burner programming circuit to open only at the end of the pre-purge period and to remain open until the main flame has been proven. Both valves shall be UL approved, and, in addition, the gas valves shall be approved by the American Gas Association. Each solenoid valve shall be manufactured by Automatic Switch Co. (ASCO), Honeywell, ASCO/General Controls Co. The solenoid oil valve shall be designated by the manufacturer for use with No. 2 fuel oil at the pressure of this system. The solenoid pilot gas valve shall be designated by the manufacturer for use with natural gas at the pressure available. 3. Hydramotor valves: Each burner shall be provided with 120-volt electrohydraulically operated 2-way normally closed bronze, underported, globe-type oil safety shut off valve with a single, quick opening stem guided seat. Hydramotor valve shall be provided with a FM proof of closure switch. The valve and proof of closure switch shall be wired through auxiliary contacts of the burner motor starter and into the burner programming circuit so that the valve will open only when the gas pilot flame has been proven and will remain open until the steam demand has been satisfied, unless flame failure occurs. FM proof of closure interlock switch shall be wired into the flame safeguard preignition interlock circuit and will not allow burner start up without proof of closure. 7 NYCSCA in 2. 1 22 equal) FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 15 05/15/15 DESIGN NO. _____ Hydramotor valves shall be UL listed, shall have complete closure in 1 second or less and shall be Model HOV1 as manufactured by ASCO/General Controls. Provide two tee fittings between the two oil safety shut-off valves. The first tee leg shall be equipped with a test port that can be opened to verify that the upstream solenoid safety valve is closed. The second tee leg shall be equipped with an oil relief valve and connected back to the oil return line to relieve any excess pressure between the shut-off valves. 22 22 NYCSCA 4. Metering Device: Each burner unit shall be equipped with an approved B.A.R. metering device. The metering device shall be designed so that its maximum delivery rate will be fixed so as not to exceed the required firing rate of the burner. 5. Modulating Direct Coupled Actuators: Provide Direct Coupled Actuators (Honeywell ML7999 Universal Parallel Positioning Actuators or approved equal). The parallel positioning master proportional controller shall control the combustion air dampers to maintain proper combustion as the oil flow is varied in response to heating load. The modulating motors shall be equipped with a high-fire switch to prove that the motors have moved to the high-fire position during the pre-purge period, and with a low-fire switch to prevent burner ignition unless the modulating motors are at the low fire position. The parallel positioning control shall have external switches mounted on the driven members of the air dampers indicating high fire and low fire position during the purge period; also an external switch indicating low fire position of the fuel metering arrangement to prevent burner ignition unless both external low fire light off indicating switches are electrically closed. Also, the end switch on the sequential draft damper shall be interlocked with burner motor controls, to ensure 100% opening, prior to pre-purge. 6. Modulating Controller: On each boiler, provide a modulating controller, Honeywell P7810C Combination Pressuretrol controller consisting of an analog header pressure sensor firing rate controller, On/Off Cut-In/Cut-Out controller, and Limit controller with manual reset. Connect the controller to the boiler so that varying boiler pressures will actuate the parallel positioning FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 16 05/15/15 DESIGN NO. _____ master proportional controller that in turn will actuate the Direct Coupled Actuators to maintain constant steam pressure. Piping connection shall include a syphon. Provide Direct Coupled Actuators for all combustion air dampers and all fuel valves (gas or oil). 7. 8. NYCSCA Pressure Operating Control a. Provide on each boiler a pressure operating control, which shall be installed with syphon as indicated on the Drawings and approved Shop Drawings. Control shall be integrated into the Honeywell Pressuretrol P7810C or equal. Operating control shall function to stop the operation of the burner when the boiler pressure reaches 8 PSIG and to cause the burner to start when the pressure drops to a selected lower pressure. b. When the lead-lag programming control, specified in Paragraph 2.05, requires a pressure control installed on the steam header, it shall be in addition to the control installed on the boiler and shall be one of the makes specified in 7.a. In this case, the control installed on the header shall act as the primary operating control, and shall be set in accordance with the recommendation of the lead-lag control manufacturer. The pressure operating controls installed on the boilers shall all be set alike: cut-out pressure not to exceed 8 PSIG; cut-in pressure at a pressure lower (approximately 1 PSIG) than the header (lead-lag) control cut-in pressure. Pressure Limit Control: Provide on each boiler a pressure limit control, wired in series with all other control devices to the ungrounded conductor, to stop the burner and to interrupt completely the power to the flame failure control if the boiler pressure exceeds 12 PSIG maximum. Control shall be installed with a siphon. It shall be equipped with manual reset feature and shall be integrated into the Honeywell Pressretrol P7810C or approved equal. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 17 05/15/15 DESIGN NO. _____ 9. Flame Failure Control a. Each burner shall be provided with a flame failure (combustion safety) programming control which will de-energize all electrically operated fuel valves and burner equipment per ASME CSD-1-2004, and actuate a visual alarm mounted on the control panel after an operating flame failure has occurred. Automatic start up and shutdown programming shall be a part of this safety equipment. b. Pilot and main flame shall be detected by a lead sulphide infrared or ultraviolet scanner as per burner manufacturer's recommendation. Scanner shall be so located as not to be actuated by hot refractory or other hot body. When ultraviolet flame detection is used, a test is required to verify that ultraviolet radiation from the ignition spark is not being detected. c. Control shall provide for prepurge prior to light off, proof of pilot before main fuel valves open, proof of main flame only during run, and post purge at the end of each firing period per ASME CSD-1-2004. Control shall affect a safety shutdown prior to the opening of the main fuel valves if the presence of the pilot flame has not been proven. 1) NYCSCA Burner pre-purge cycle and post-purge cycle shall operate as follows: The prepurge cycle shall be 100% air flow and shall have a duration equivalent to a minimum of 4 air changes. The post-purge cycle shall be 15 seconds minimum (adjustable) for burners greater than 20 gph per ASME CSD-1-2004. d. In case of electrical power supply failure, control shall recycle automatically when power is restored. In case of safety shutdown, control shall not permit recycling of the burner equipment until after the manual operation of a reset button. e. The control shall accomplish a safe start component check during each start. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 18 05/15/15 DESIGN NO. _____ f. Flame failure control for each burner shall be installed in the control cabinet with remote mounted Keypad/Display Module or Touch-Screen installed at a height of 4'0" off the floor, incorporating at a minimum a two line by sixteen character backlit LCD display and three button keypad or Touch-Screen to provide both operational and comprehensive diagnostic information. The FIREYE E300 Expansion Module or Honeywell S7830 Expanded Annunciator Module shall provide additional monitoring and first out annunciator capability for up to 16 specific interlock functions. The Flame Monitor control, working in conjunction with the Expansion Module, shall display the exact safety interlock that caused the safety shutdown. The description of each safety interlock shall be programmed with the keypad/display or Touch-Screen to match the current wiring configuration. g. 15 10. Provide a low fire hold minimum temperature aquastat and wire into boiler modulation and limit circuit to prevent boiler from modulating to high fire until water temperature reaches 180oF. Aquastat shall be similar to Honeywell Model L 4006B or L6006A and shall be installed in tapping in shell below water level closest to water surface. 11. Night setback: existing CIP Project buildings – Wireless pneumatic thermostats shall be provided as defined in Section 15974. 12. For Fire tube boilers with fuel input greater than or equal to 12,500,000 BTUH (300 BHP nominally), and above: All boiler / burner controls shall meet NFPA 8501 requirements in entirety, including the following: -Two safety shut-off valves in series, each with proof of closure (fuel oil or gas). -Two safety shut-off valves in series in the pilot gas line, with an automatic vent valve between the 14 NYCSCA Controls shall be Honeywell 7800 series or FIREYE E110 Flame Monitor. Provide all the required modules. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 19 05/15/15 DESIGN NO. _____ two valves. The vent pipe shall be routed to outside independent of other vents. 13. For Water tube boilers with fuel input greater than or equal to 12,500,000 BTUH (300 BHP nominally) & above: In addition to requirements above, the following shall also be satisfied: -Purge cycle shall be sufficient for at least eight air changes. Prove purge airflow by air pressure measurement and ‘open damper’ interlock for all dampers in the flow path. -Prove pilot flame within 10 seconds, after which pilot shall be shut off; vent the gas piping between pilot safety shutoff valves to the atmosphere. N. Burner Control Panel: 1. 1 20 The burner manufacturer shall provide for each boiler/burner, a boiler/burner control panel that shall house all required operating controls and electrical components. The burner control panel shall be constructed of not less than 16 gage sheet steel in accordance with NYC Electrical Code and shall be complete with hinged and removable front access door. The panel shall contain the following equipment assembled, connected and wired: Burner Motor Circuit Breaker Burner Motor Starter3 ph. with overload protection Forced Draft Fan Motor Circuit Breaker Forced Draft Fan Motor Starter - 3 ph. with overload protection Fuel Oil Pump Circuit Breaker Fuel Oil Pump Motor Starter - 3 ph. with overload protection Atomizing Air Compressor Circuit Breaker Atomizing Air Comp. Motor Starter - 3 ph. with overload protection Control Circuit Transformer Control Power ON-OFF Switch Manual-Automatic Switch Control Potentiometer Low Fire Potentiometer Flame Safeguard & Programming Control With Honeywell 7830 Display Module or approved equal NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 20 05/15/15 DESIGN NO. _____ Parallel Positioning Control With Honeywell S7999B Display Module or approved equal Alarm Silence Push Button Alarm Bell Draft Control Draft Gauge Flue Temperature Gauge Smoke Density Monitor 2. The Burner Control Panel shall be equipped with BAR approved Draft Controls. Each draft control system shall include the following: Draft program control, linear actuator (field mounted), draft indicator with 3 way cock, low draft switch with time delay. 3. The following lights and/or alarms shall be included as a minimum readable from the exterior of a closed control panel: Power On Flame Failure Pilot ON Main Fuel Oil Valves ON Main Gas Valves ON Pre purge Post Purge 1 20 4. 1 20 Light x x x x x x x Alarm x The FIREYE E300 Expansion Module and E110 Flame Monitor or the Honeywell S7830 Expanded Annunciator Module and 7800 Flame Monitor shall read and/or annunciate (audible alarm) the following information readable from the exterior of a closed control panel: Pre purge Post Purge Low Atomizing Air Pressure Low Fuel Oil Pressure Low Water Burner Smoke Density High Limit Steam Pressure Low Draft Low Gas Pressure High Gas Pressure Fuel Selector Switch Air Flow Provide a relay coil in parallel with the alarm horn which will close a set of dry contacts when NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 21 05/15/15 DESIGN NO. _____ the alarm horn annunciates. Dry contacts shall be wired to low voltage field wiring strip terminals by OEM. (Subsequent AWG 16 twisted pair connection to field wiring strip shall be by Div 16 Contractor to the alarm auto-dialer). 5. 1 20 Local display shall afford the operator the maximum amount of information in an easily understood format. Storage capacity shall include the number of alarm failures for each point as well as the following information Time Fuel Oil Firing Time Gas Firing 6. O. 2.03 13 NYCSCA Interface Drawings shall be provided by the boiler/burner manufacturer for the entire control system of the boiler/burner and auxiliaries including but not limited to feedwater and code related devices as controlled by the burner control panel. Two drawings shall be provided. One a ladder diagram for sequence of operation and two, a line drawing of the actual wiring of the panel complete with wire numbers and color code. All burner smoke alarm controls and stack controls installed in the stacks shall be fitted with glass lens caps, sealing bellows or equal approved method to assure positive stack seal. STEAM BOILER EQUIPMENT CONTROL POINTS A. The fuel burner manufacturer shall provide a control interface (Control System Gateway) between the Steam Boiler(s) electronic control panels and the LonWorks Building Management System (BMS). The Temperature Control Contractor (TCC) shall provide integration of monitoring and alarm functions as indicated in Contract Specification 15985 and on the Drawings. B. The Temperature Control Contractor shall provide to the burner unit manufacturer a listing of LonWorks DDC input/output Standard Network Variable Type (SNVT) listings, Functional Profiles, and Configuration Properties that are to be integrated from the electronic burner control system into the LonWorks BMS. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 22 05/15/15 C. NYCSCA DESIGN NO. _____ CONTROL SYSTEM “GATEWAY” 1. The manufacturer of the electronic fuel burner plant controller shall provide a protocol translator gateway for native control systems that are not LonWorks compliant in order to convert to the LonTalk protocol (ANSI approved standard EIA/CEA-709.1-A-1999). 2. The protocol translator gateway shall enable the electronic fuel burner plant controller network devices to communicate directly with the Authority’s LonWorks based Building Management System. 3. Provide interoperable protocols as specified: Modbus, Profibus, or approved equal. Use of a proprietary burner management protocol other than Modbus or Profibus is subject to approval of the Authority’s Facility Management Systems Integrator. 4. The data transfer between Modbus/Profibus and the LonTalk protocol shall provide the required Standard Network Variable Types (SNVTs) and configuration parameters to monitor the Steam Boiler plant from the LonWorks based Building Management System using the LonTalk protocol. 5. The data transfer between the manufacturer’s steam boiler electronic control panels and the Authority’s LonWorks based Building Management System is to be accomplished using a Field Server, or approved equal, protocol translator gateway and additional integration hardware specified below per the requirements of Facility Management Systems Integrator Specification Section 15973. All the required software and configuration files shall be provided and be downloadable via the serial or Ethernet port of the gateway. 6. Where the use of a unique proprietary protocol is utilized by the burner manufacturer, a custom designed configurable “gateway” shall be provided by the manufacturer of the burner. Use of a unique burner manufacturer proprietary protocol is subject to the approval of the Authority’s Facility Management Systems Integrator. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 23 05/15/15 DESIGN NO. _____ D. The burner manufacturer shall retain the services of a Field Server approved Systems Integrator, or approved equal, who shall demonstrate the proper integration of the boiler control system to the satisfaction of the Authority’s Facility Management Systems Integrator and in accordance with the requirements of the Drawings and Specification Sections 15970, 15985 and 15973. E. Submit manufacturer's wiring diagrams for interlock and control wiring required for final installation of the burner controls interface. Clearly differentiate between portions of wiring that are factory-installed and portions to be field-installed by the burner control panel manufacturer. F. The above addresses electronic burner control systems. For electric air/fuel burner control systems (example: where a digital steam header pressuretrol is used in lieu of an analog electronic pressure control), the Temperature Control Contractor and the Mechanical Contractor shall provide sensors, wells, control devices, current switches/transformers, LonWorks Controllers, etc. as required to comply with the Sequence of Operation indicated in Specification Section 15985. 2.04 FLUE GAS TEMPERATURE INDICATORS A. 2.05 Provide a thermocouple type flue gas temperature indicator for each boiler. Thermocouple shall be located on the boiler smoke box, and the indicator shall be flush mounted in the burner control cabinet. Temperature scale shall be graduated in 10°F increments, from 0°F. to approximately 1000°F. Excess thermocouple wire shall be coiled and secured within the control cabinet. Installation shall be made in accordance with the manufacturer's written instructions. Flue gas temperature indicators shall be Preferred Instruments Model JC11F. SMOKE DENSITY MONITORS FOR BURNERS A. 31 NYCSCA Provide a system of smoke indicating equipment for each boiler to provide continuous and accurate smoke detection. Provide one dedicated remote audio/visual annunciating alarm per boiler outside the Boiler Room located adjacent to the main door of the Boiler Room. Each remote alarm shall be powered from its respective main opacity monitor. The alarm shall not have any delay and the burner shutdown delay shall be 120 seconds per FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 24 05/15/15 DESIGN NO. _____ the NYC Bureau of Air Resources. Time delays shall be fixed (i.e. shall not be adjustable). B. The Smoke Density Control shall employ a reflex light principle whereby a focused light beam from the control is directed at a unique reflector across the breeching. The solid state photocell in the control compares the level of light received with that transmitted. When smoke is detected, the signal output shall be used to actuate alarms, indicate on meters and recorders the accurate density, shut off the burners. The combustion shutdown shall be so designed that once it has been activated, the burner cannot resume operation without manual reset of the smoke density monitor. The smoke alarm shutdown shall be wired in the flame safeguard, non-recycling limit circuit. C. The control shall be designed for stability, simple installation and trouble-free operation through the use of solid state circuits, including electronic compensation for lamp deterioration and voltage variations. A relay, with an adjustable set point, accurate within 2%, shall actuate an alarm circuit when the smoke density exceeds an acceptable level, and on failure of the Control. A D.C. voltage output signal shall be provided for recorders and meters. D. Manufacturers: Smoke Opacity Monitor: Preferred Instruments Model JC30D, Hayes Cleveland Series A08700 Model A-08740 Remote Audible/Visible Alarm: Preferred Instruments Model SDAVB, Hayes Cleveland Model L05500-00 2.06 LEAD LAG PROGRAMMING CONTROL A. NYCSCA Provide a lead-lag programming control to sequence automatically the firing of multiple boilers with changing load conditions. The sequence for start-up and operation shall be such that the first (lead) boiler starts-up and reaches its burner delivery (high fire) rate. If the first boiler is unable to meet the steam pressure, the second (lag) boiler shall automatically fire. (On a three-boiler installation, the two lag boilers shall be automatically alternated with each call for operation). Both boilers shall operate in unison, FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 25 05/15/15 DESIGN NO. _____ modulating to meet the demand. If the demand is exceeded by both boilers firing at low fire, the lag boiler shall automatically shut down. The lead boiler shall shut down when the demand has been exceeded. Selection of the lead boiler shall be made either manually by means of a selector dial on the control cabinet or automatically as an electrical function of the programming control. 2.07 SEQUENCE OF OPERATION FOR BREECHING DAMPER A. During the period when there is no call for burner operation by the boiler pressure operating control, the breeching damper shall be maintained in the safe closed position. Safe closed position shall be understood to mean that the damper blade shafts have been rotated approximately 70o from the fully open position. B. When the boiler pressure operating control calls for burner operation, the following sequence of operation shall take place: ï‚· ï‚· ï‚· ï‚· ï‚· 1. 24 NYCSCA On call for heat: outdoor air intake damper, combustion air damper at burner and sequence draft damper shall prove open, prior to pre-purge. Sequence draft damper shall be driven to full open position during pre-purge. For ignition, the sequence draft damper shall move to safe starting position. When the fuel oil valve opens, draft damper control is placed under automatic draft control. During normal burner shutdown, the draft damper is driven open for post purge and is closed at the end of purging. Safety burner shutdown shall cause the draft damper to remain where it was at the moment of shutdown until flame safeguard is reset. Breeching damper shall move to safe starting position, which shall be adjustable in the field. On call for heat operation, the sequential draft damper cycle shall be initiated; on proving open, damper purge cycle shall start. Forced draft fan and, where provided, induced draft fan shall start. After pre-purge, safe starting draft must be proven in combustion chamber before light off can take place. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 26 05/15/15 24 DESIGN NO. _____ 2. Forced draft fan and, where provided, induced draft fan shall be controlled through auxiliary fan relay in burner control panel. 3. As soon as safe starting draft is established, the flame failure control shall go through normal sequence of pilot ignition, pilot proving, main flame ignition and proving. When main flame is proved, draft controller shall modulate to maintain constant combustion chamber draft, within .01" W.C. of adjustable setting, regardless of firing rate or atmospheric conditions. 4. When boiler pressure operating control is satisfied, flame failure control shall de-energize the gas or oil solenoid valve, shutting off main flame. Forced draft fan and, where provided, induced draft fan shall continue to run for 15 second (minimum) Post Purge Period. During this period, breeching damper shall remain open to permit venting of gases. After completion of post purge period, breeching damper shall move to safe closed position. 5. At any time during an operating cycle, if the draft in the combustion chamber should fail for any reason, a signal light in the draft controller shall so indicate and if draft is not reestablished within 5 to 7 seconds, the burner shall be shut down. 6. In case of flame or power failure or any emergency, burner shall shut down and breeching damper shall open fully and remain open. Burner and fan motors shall shut down with burner lockout. Draft sequence controller shall recycle after manual reset of flame failure control. 20 24 2.08 22 TRANSFER OIL PUMPS A. NYCSCA Provide factory-assembled, package type transfer oil pumps. Assembled on a structural steel or cast iron base shall contain the following: 1. Two fuel oil pumps with motors 2. One duplex oil strainer (100 mesh strainer basket) 3. Two vacuum gauges (at inlet and outlet of strainer) FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 27 05/15/15 13 NYCSCA DESIGN NO. _____ 4. Two pressure gauges (one at each pump discharge) 5. Two relief valves (one at each pump discharge) 6. High limit manual reset oil pressure switch (at discharge of pump set) 7. Pre-wired control cabinet B. Transfer oil pumps shall deliver the constant flow of the capacity shown on the Drawings to a low pressure piping loop which will convey the oil to the suction side of the burner oil pumps and then back to the oil storage tank. Oil flowing in the loop will be bled off at the individual burner oil pumps for delivery to the burners. Excess oil discharged by the transfer pumps and burner oil pumps shall be returned to the oil tank via the piping loop. Oil piping configuration shall be as set forth on the Drawings. Under no circumstance shall the transfer pumps be used as the burner fuel oil pumps for atomizing the oil at the burners at high pressure. C. Fuel oil positive displacement gear pumps shall be of the capacity shown on the Drawings. Pumps shall be mounted on a steel channel base directly connected to the motors. Pump shall have cast-iron housing, steel gears, bronze bearings, steel shaft, and mechanical seals. D. Each pump motor shall be provided with a circuit breaker and with a magnetic type motor starter. Pump selector switch shall operate so that power to the non-operating motor starter is disconnected when its circuit breaker is tripped. In addition to the foregoing, each pump shall be provided with protective and disconnecting devices, and wiring to comply with NY City Regulations and Codes. Also, the transfer oil pumps shall be wired through the emergency break glass station switches for complete shutdown of the pumps in the event of an emergency. E. Transfer oil pumps shall be wired to burner panels so that when boiler is operating on oil, the transfer oil pump shall start automatically. Transfer oil pumps shall be automatically locked out when operating on gas. The Temperature Control Contractor shall integrate transfer pump system into the Building Management System/Direct Digital Control, BMS/DDC, if BMS/DDC system is provided. Upon any fuel oil pumpset failure and/or alarm condition, the general alarm contact shall be closed and initiate an alarm at the operator’s workstation. The Temperature Control Contractor shall hardwire the digital input to FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 28 05/15/15 DESIGN NO. _____ the nearest available Lon controller or provide LonPoint module or “gateway” as required to integrate the transfer oil pumpset into the LNS network system as required to provide integration and alarm functions as indicated in Contract Specification 15985. F. Gauges and relief valves shall be as specified. G. Transfer Oil Pumps shall be installed on a concrete base specified in Section 03300. H. Control Cabinet I. 30 NYCSCA 1. A galvanized or cadmium plated steel control cabinet not lighter than No. 14 gage with hinged front door shall be mounted on the pumps base. Hinges shall be heavy duty with removable pins. Switches shall be installed on the outside of the front face of the cabinet. Each item of control equipment shall be identified by engraved laminated plastic nameplates. 2. Cutouts shall be provided in the door to operate the circuit breakers and the motor starter resets. A wiring diagram of the pump shall be mounted on the interior surface of the cabinet door. 3. The control cabinet shall contain the following equipment, all factory wired, as well as other necessary hardware and devices: 3 pole circuit breaker for each oil pump motor, magnetic starter for each pump motor, pump selector switch, control circuit fuse block, high limit oil pressure switch, 4 pole power supply terminal block, and required number of terminals to wire necessary external components. 4. Exterior of cabinet shall be finished in gray enamel. Cabinet shall bear building trades union label. Per Section MC 1305.3.4, appropriate safeties shall be provided so that the detection of heat within the boiler equipment room shall prevent additional fuel oil from being pumped into the piping system within such room. Provide fusible link operated lever gate valves in the supply pipe at the wall of the boiler room. Per Section MC 1305.13.3.3, rooms above the lowest floor containing fuel oil tanks shall be equipped with automatic smoke detection. Fuel oil burning equipment rooms shall be FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 29 05/15/15 DESIGN NO. _____ equipped with automatic heat detection in accordance with Section BC 907 of the 2014 NYC Building Code. Div 16 Contractor (refer to Section 16720) shall wire heat detectors to Fire Alarm Panel to automatically shut-down the transfer pumps if excessive heat is detected. Mechanical Contractor shall coordinate with Division 16 Contractor for transfer pump shutdown. NYCSCA J. Per Section MC 1305.9.4, a drain pipe shall be installed at the base of shafts enclosing the supply and overflow/return piping. The pipe shall lead to a dedicated sump or minimum 55 gallon container with a leak detection alarm, arranged so as to sound an alarm and stop the transfer pump. The alarm shall be connected to a local audible alarm and to a remote alarm located at a supervising station. The wiring shall comply with the NYC Electrical Code. Per Section MC 1305.9.3, where it is necessary to make horizontal offsets in the supply and overflow/return piping and pipe shafts, including the lowest level, such piping shall be enclosed in a sleeve of other piping of at least No. 10 standard Gage steel, two sizes larger than the supply piping and arranged to drain into the shaft. Horizontal piping offsets shall be further enclosed in construction having a 2-hour fire-resistance rating except that no such enclosure or pipe sleeve shall be required for the pipes serving the equipment within the room containing the pump, tank, or equipment where such room is itself enclosed with construction and materials having at least a 2-hour fire-resistance rating. Horizontal piping shall include all piping at or above the roof level. No 2-hour fireresistance rated enclosure is required for horizontal piping offsets located outside the building. K. A remote control shall be provided to stop the flow of oil to any boiler equipment located on levels above the lowest floor in buildings. Such control shall be located outside the entrance to the room in which the equipment is located and as close to such entrance as practicable, except that when an outside location is impracticable, such control may be located immediately inside the room in which the burner is located, provided such location is accessible at all times. All such controls shall be permanently labeled: “REMOTE CONTROL FOR BURNER”, or as appropriate to the oil-burning equipment. Reference Section MC 1305.10. L. Transfer oil pumps shall be of the highest grade manufactured by Preferred Utilities Manufacturing Corp., Viking Pump Division of Houdaille Industries, Inc., FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 30 05/15/15 DESIGN NO. _____ Worthington Pump Co, Iron Fireman, Lonergan Pump Systems Inc with Tuthill Pumps and EASCO/GPEG LD2D. 2.09 22 NYCSCA FUEL OIL ACCESSORIES A. Per Section MC 1305.3.4, appropriate safeties shall be provided so that the detection of heat within the boiler equipment room shall prevent additional fuel oil from being pumped into the piping system within such room. Provide fusible link operated link lever gate valve in the supply pipe at the wall of the boiler room. Additionally, provide spring loaded lever gate valve in the fuel oil supply line to the transfer pumps. Lever gate valves shall be quick-closing, spring loaded, lever gate valves held open by a wire with a fusible link arranged so that the valves will automatically close if the link melts. Valves shall be Preferred Utilities Mfg Corp. Type 110. B. Strainers (Oil Burner): Provide simplex strainers in the oil supply close to each burner (ahead of the magnetic oil valve) and duplex at the fuel oil transfer pumps in an accessible location. Strainer basket shall be 3/64" perforated 100-mesh stainless steel installed in a heavy gray cast-iron body. Body shall be provided with an easily removable cover, screwed or yoke fastened at the top, and with a plugged, large size drain at the bottom. Strainers shall be designed for operation on pressures up to 15 pounds per square inch and tested hydrostatically at 250-pounds per square inch. Strainers shall be of the highest grade manufactured by Hayward Manufacturing Co., Kraissl Co., Preferred Utilities Mfg. Corp., Ray Burner Co., O. C. Keckley Company, or approved equal. C. Relief Valves: Provide relief valves in the oil piping. Valve bodies shall be one piece bronze construction suitable for pressure to 300 p.s.i. Each relief valve shall be equipped with a locking device to prevent vibration from disturbing the setting after initial adjustment has been made. D. Flexible metal connectors and hoses used where rigid connections are impractical or to reduce the effect of jarring and vibration shall be listed and labeled in accordance with UL 536 and shall be installed in compliance with its label and the manufacturer’s installation instructions. Connectors made from combustible materials shall not be used inside buildings or above ground outside of buildings. Reference Section FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 31 05/15/15 DESIGN NO. _____ MC 1302.8. length. 2.10 Flexible connectors shall not exceed 18” in BOILER ROOM O.A.I. DAMPERS AND MOTORS A. 1 B. 1 Parallel blade damper motors shall be spring return type designed to operate with a transformer on single phase, 120 volt, 60 Hz service. Transformer shall have thermal overload protection. Each damper (parallel blade damper, fire damper, and smoke damper) shall be equipped with an external type switch that shall be so wired into the burner control circuit as to prevent the opening of the main fuel valves unless all of the outside air dampers are open. C. Provide electric wiring between each burner control cabinet and its corresponding parallel blade outside air damper motor. D. Per Sections MC 706.1.1 and FGC 304.9.2, each of the appliances served shall be interlocked with the forced mechanical air supply system to prevent main burner operation when the forced mechanical air supply system is not in operation. The air flow and all damper operations shall be proven prior to burner operation. 1 E. NYCSCA The boiler room outside air intake opening shall be divided equally into the number of sections corresponding with the number of boilers. Each section shall be provided with (fire dampers and smoke dampers as required per Sections MC 709.2 and FGC 304.10.1) and parallel type multi-blade dampers, automatically operated by the burner control for which they are intended. The parallel type dampers shall open fully whenever the burner combustion fan is operating and the parallel type dampers shall close when the burner combustion fan is not operating. Motors shall be securely mounted on the damper frame and connected with linkage to the damper blades. Per Section FGC 304.10.2, a sign stating, “Louvers, dampers and/or ventilation openings must not be blocked or disabled.” shall be permanently affixed, in clear view, adjacent to the opening(s) within the room containing the equipment. The letters used on the sign shall be at least 1” in height. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 32 05/15/15 2.11 DESIGN NO. _____ FIRE EXTINGUISHER A. 2.12 Provide in location at each burner, one 5 pound capacity BC dry chemical charge fire extinguisher. (Refer to Section 10522: Fire Extinguisher and Cabinets). FUEL BURNING AND HANDLING EQUIPMENT CONTROL POINTS A. 13 Temperature Controls Contractor (TCC) shall provide integration of monitoring and alarm functions by providing control points as indicated in Section 15985. Burner manufacturer shall provide gateway to convert from their protocol to the LonWorks protocol (LonTalk). PART 3 – EXECUTION 3.01 SUPPLEMENTAL INSTALLATION A. Electric Work: 1 1. 20 2. NYCSCA Mechanical Contractor to provide at a minimum, burner, atomizing air compressor and transfer oil pumps starters, control wiring, power wiring connections from each burner control cabinet to burner and atomizing air compressor and all other items and accessories to make system fully operational. Equipment shall be provided with terminal boxes to receive connecting conduits. The use of wire nuts in lieu of terminal boxes for the splice connections is prohibited. All electric work shall conform to the requirements of the Bureau of Electrical Control, and other authorities having jurisdiction. File an application for electrical inspection with the Bureau of Electrical Control. At the completion of the electrical work, submit with the application for progress payment, the pink copy of the job posting card issued by the Bureau of Electrical Control in connection with each application for certificate of electrical inspection. Electrical wiring is under Division 16. Electrical Contractor to provide power wiring to each burner control cabinet, lead-lag programming control, each transfer pump set and all other items and accessories to make system fully operational. For packaged assemblies, Mechanical Contractor to provide terminals on the equipment to receive the service wiring, together with motor starters, contactors, protective and disconnecting devices, FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 33 05/15/15 DESIGN NO. _____ 1 20 NYCSCA and all other items and accessories, as required to make the installations complete. Mechanical Contractor to provide all wiring between the control cabinets and the burner equipment, burner controls and emergency cut-out switches, low water cut-offs, burner smoke density monitors, forced draft fans, draft sequence equipment, boiler leadlag control and outside air intake damper motors. 3. Conduit: Wiring shall run in conduit (per the NYC Electrical Code), except the wiring in control cabinets, and where flexible connections are necessary. Wiring connections between each control cabinet and the ignition assembly box shall be in either standard conduit with oil impervious gasketed connections or in flexible oil tight conduit (Sealtite). Wiring connections between the ignition assembly box and the burner motor, between all motors and all other items and accessories shall be in flexible oil tight conduit with Scotchlok 2 connectors inside junction box. In other locations, flexible metal conduit (Sealtite) may be used for final connections not exceeding 3' in length. Conduits shall be not less than 3/4" standard weight galvanized steel conduit, large enough to accommodate the wires specified. Flexible oil tight conduit (Sealtite) shall be U.L. approved. No conduit shall be installed in contact with the boiler room floor. 4. Conductors: a. Conductors shall be copper of 98% conductivity, and free of splints, flaws, or other defects. They shall be in accordance with the NYC Electric Code, and with Bulletin No. 8, 1963 of the Department of Water Supply, Bureau of Electrical Control. Conductors shall be delivered in their original packages or reels, which shall be marked with the manufacturer's identification and date of manufacture. Conductors manufactured more than one year prior to delivery at the job will not be accepted. b. Wiring between the burner control cabinet and associated equipment installed shall be type THHN, 90o C, 600 volts. FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 34 05/15/15 25 3.02 5. Magnetic Motor Starters (for packaged equipment): Starters for control of the motors shall be magnetic type and shall be equipped with proper size thermal overload relays, and enclosed triplepole (25-ampere contactor) magnetic switch providing overload and voltage failure protection. Where motor starters with disconnect switches are required, the starters may be combination type. Where fuse protection are required, the starters shall be equipped with proper size fuses. 6. All electrical connections and all electrical work in the gas meter room shall be explosion proof. The Division 16 Electrical Contractor shall provide Hand-Automatic starters, disconnects, thermal overload and accessories as required and as specified in Section 16441: Safety Switches and Section 16480: Motors, Control Equipment and Circuitry. B. Boiler draft control signal piping between the boiler and draft control shall be of size required by DEP BAR and the equipment manufacturer. Cross tee's shall be used at every directional change. Unused tappings shall contain brass plugs. The tapping used to obtain the draft control signal shall be an over-fire draft tap. Taps at the vent outlet of the boiler are not acceptable. C. Per Section MC 1004.3, clearances shall be maintained around equipment and appliances so as to permit inspection, servicing, repair, replacement and visibility of all gauges. When equipment is installed or replaced, clearance shall be provided to allow access for inspection, maintenance and repair. Passageways around all sides of equipment shall have an unobstructed width as required by the manufacturer and in no case less than 18”, unless the boiler’s listing or department approval or manufacturer’s installation instructions state otherwise. INSTALLATION OF THE SMOKE DENSITY MONITOR FOR BURNERS A. NYCSCA DESIGN NO. _____ The Smoke Alarm unit and reflector shall be designed for mounting on the flue, breeching, or stack as required. They shall slip-fit on mounting pipe and lock in place with an Allen head set screw and clamp respectively fitted with a sealing rubber bellows between the Smoke Alarm Unit and pipe nipple which is pressure tight. The Control and Reflector shall be supported independently of the breeching. The alignment of the Light beam must not FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 35 05/15/15 DESIGN NO. _____ be affected by thermal distortion or vibration of the breeching, stack or flue. 3.03 B. The light source and photoelectric receiver shall be mounted on opposite sides in exact visual alignment. Each shall be contained in an aluminum dustproof housing. Provide pressure and glass lens caps for boiler smoke box openings to make it pressure tight. Pressure caps and their lenses shall be easily removable for cleaning. C. The location chosen for scanning across the stack, breeching or flue must reveal the true smoke pattern. Visual observation of actual smoke conditions should be made at the point selected for mounting, before installation and approved by the Authority. The location should also be readily accessible for maintenance and be within the ambient temperature limits of the equipment. After the location has been selected, openings must be made at directly opposite points in each wall. The diameter of these openings shall be in accordance with the manufacturers’ installation instructions. Mounting nipples shall be installed. To assure an accurate smoke indication, the span of the light beam shall be adjusted to approximately equal the inside stack diameter at the point of smoke discharge. D. Provide pressure sealing bellows, glass or lens caps to prevent blowout of combustion products. INSTALLATION OF THE SPRING LOADED LEVER GATE VALVE A. 22 3.04 Install the valve in a horizontal oil pipe run where shown on the Drawings. Run the trip wire with the fusible link(s) over the fuel oil transfer pumps in an accessible location. In applications utilizing long wire runs with many fusible links, a weight should be added to insure that the valve will close reliably and quickly. FIELD QUALITY CONTROL/INTERDISCIPLINARY TESTS AND FUNCTIONAL PERFORMANCE TESTS (FPT) A. Performance Tests 1. NYCSCA Performance tests are required upon the completion of the burner installations. Performance tests shall be conducted in compliance with Part II of the Engineering Criteria Fuel Oil Burning Equipment for boilers having burner inputs equaling or exceeding 2,800,000 BTUH. Test holes 5/16" in diameter shall be drilled in numbers and locations FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 36 05/15/15 DESIGN NO. _____ 13 2. approved by the Bureau of Air Resources. Insulation (if any) around the test hole location shall be removed from an area 4" by 4", dust removed and exposed insulation walls painted. Contractor shall submit signed functional performance testing affidavit signed by the factory authorized service representative indicating that all of the manufacturer’s functional performance tests have been successfully completed and that the equipment is operating as designed. Refer to the Drawings and Section 15985 since a BMS/DDC system is to be provided and the equipment is to be integrated into the BMS/DDC system. Prior to the date of the scheduled performance test to be conducted by the Bureau of Air Resources' personnel, and on a date convenient to the Authority, Contractor shall demonstrate that: a. The burner is limited by a means approved by the Bureau of Air Resources to a burning rate approved in the Work Permit. b. Induced draft fans, if any have their speed adjusted on the job site to that required in the plans or specifications. c. With breeching damper in open position, the pressure drop across the damper does not exceed 0.05" water column at high fire. d. The burner parallel positioning system is adjusted so that the flue gas levels satisfy B.A.R. Criteria. e. Demonstrate that the burner flame, at maximum or "high" fire, does not impinge on any refractory or boiler surfaces. f. The "turndown" ratio of the fuel burner shall not be less than specified. g. All fuel burners shall "modulate" between low fire and high fire. The fuel burner shall modulate to the low fire position and shut off at low fire upon reaching the limit control cut-off pressure. h. Calibrate the parallel proportional controller. 24 NYCSCA positioning master FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 37 05/15/15 DESIGN NO. _____ 3. 13 B. C. 4. Provide manpower, scaffolds, instruments, burner operators and invite the Authority, as required to perform a test of the operation of all the installed equipment including a pre-performance test similar to that described in the Bureau of Air Resources Criteria. This test shall precede the actual performance test conducted by Bureau of Air Resources personnel on their inspection date, by no more than 10 working days. Contractor shall have a licensed oil burner operator present at this pre performance test and at the final one. 5. After the aforementioned adjustments are made and all violations corrected, Contractor shall, on the date designated by the Bureau of Air Resources, return with all necessary manpower, scaffolds, and any other items and accessories, all as above listed and as needed to assist at the performance test required by the Bureau of Air Resources Supervisory Personnel: Provide field service personnel in the employ of the Fuel Burning Equipment and Control System Manufacturer for such time as required to put installed equipment into operation. Supervisory services shall include the following: 1. Inspect fuel burner and control installations prior to start-up. 2. Supervise initial firing of burners. 3. Boiler/Burner testing. 4. Training of Personnel. 5. Service. Boiler Pre-Start Up and Start-Up Interdisciplinary Tests: 1. NYCSCA The Temperature Control Contractor shall test the LonWorks DDC interface gateway system and demonstrate compliance with requirements of the Specifications to the satisfaction of the Authority’s Facility Management Systems Integrator. Replace all damaged and malfunctioning controls and equipment. Upon completion of boiler/burner and controls installations, a manufacturers representative shall FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 38 05/15/15 DESIGN NO. _____ visit the site; inspect the installations and notify the Authority’s Representative (and copy CID) of any Work which must be done or modified prior to firing boilers. D. 6 NYCSCA 2. Upon completion of required Work, or modifications to installed Work and all pressure testing, the manufacturer's representative, with the Authority’s Construction Inspection Division shall supervise the boiler/burner start-up. Start-up burner units in accordance with the burner manufacturer's startup instructions and in the presence of a manufacturer's representative. 3. Fire the boilers and conduct a preliminary test, for the purpose of checking general operation of the boilers, proving mechanical and electrical controls and making necessary adjustments, all in the presence of the Authority Facility Inspection Department and the Custodian (NYC Department of Education). The Contractor shall submit a signed start-up affidavit signed by the factory authorized service representative indicating that all of the manufacturer’s pre-start up and start up interdisciplinary test procedures have been successfully completed. 4. Provide pre-start up check list, start-up list and operating instructions for each boiler, framed under rigid plastic and place where directed in the Boiler Room. Boiler Tests: Manufacturer's representatives shall be present for all specified boiler tests. 1. Training of Personnel: Approved Fuel Burner and Control System manufacturer's representatives and Temperature Control System Contractor shall instruct duly authorized personnel in the operation and maintenance of the fuel burners and control systems. Provide a period of 5 days (8 hours per day), not to include travel time for on-site instruction of personnel. This time shall be exclusive of all pre-start-up, start-up and service call time. Provide supervisors capable of instruction, in all phases of fuel burner and control construction, operation and accessories. If more than one instructor is required to adequately cover the overall subject (burners, FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 39 05/15/15 DESIGN NO. _____ controls and accessories), the instruction time shall be consecutive not concurrent. E. 3.05 Service: Provide the services of a competent field service representative to furnish fuel burner/boiler service to the facility. Service must be available within 48 hours from the time of notification. ACCEPTANCE TEST A. 3.06 Boilers/Burners shall not be placed in operation until completion of construction, inspection and testing and a Certificate of Compliance has been issued by the commissioner. All final inspections and tests of boilers/burners shall be subject to the provisions for Special Inspections except for inspections and test made by a qualified boiler inspector in the employ of the Building Department or a duly authorized insure company as provide in section 204 or the labor law. COMMISSIONG OF STEAM BOILER BURNERS A. HVAC Contractor shall comply with the Commissioning Requirements of Contract Specification S01660 for steam boiler burners. B. For steam boiler burners, all testing for steam and condensate piping, gas piping, oil fuel piping, hydrostatic testing of boilers, and smoke test of boiler chimney shall be completed prior to commencement of the commissioning process. 28 20 END OF SECTION BB:JV:RE 05/15/15 Notes to Specifier (Delete from Specification) 1. Edit as required 2. Edit as required. 3. Use oil Pressure Atomizing for burners with the capacity of 20 gph or less of No. 2 fuel oil. 4. Edit as required; use either air or pressure atomizing system. 5. Delete if using pressure atomizing oil burners. NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 40 05/15/15 DESIGN NO. _____ 6. Check with Project Engineer on the training, 5 days shall be the minimum. 7. Edit as required. 8. Verify with the Plumbing Engineer the gas pressure available at the site in order to determine if a gas booster pressure pump is required for the project. Edit as required. 9. HVAC Design Requirements No. 6.2.19, Gas or Oil schematics must be utilized in Contract Drawings. 10. Edit title; delete Pressure or Air Atomizing as required. 11. The Authority must review the gas connection fee as defined by the local utility prior to authorizing the use of natural gas as the source of fuel for the boilers. 12. The salvage of equipment scheduled to be removed is to be addressed in the scoping/design phase of new projects. The A/E of Record shall contact the NYC Department of Education Central Repair Shops in order to determine whether there is any interest in salvaging the components scheduled to be removed. Equipment designated to be salvaged shall be specified by the A/E to be delivered by the Contractor to a location designated by Shops. The specific equipment to be salvaged and specific delivery location shall be precisely detailed in the bid documents. 13. For fuel burning equipment installed in schools with LonWorks DDC temperature control systems. Edit as required. Steam boilers should only be used on CIP projects as New Construction and Major Modification projects will utilize gas fired hot water condensing boilers. CIP projects will not be provided with a BMS/DDC network. The integration of a steam boiler into a BMS/DDC network would be for a special case only. 14. Delete paragraphs 12 & 13, if boiler BHP is less than 300. 15. Edit as required if digital controls as defined in Section 15971 are to be used in the Classrooms and Offices when replacing existing pneumatic controls. Standard is to retain/repair pneumatic backbone when updating the terminal pneumatic controls. 16. Not used. 17. Not used. NYCSCA number of days for piping FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 41 05/15/15 DESIGN NO. _____ 18. Not used. 19. Not used. 20. Edit as required for the type of fuel selected (No. 2 oil or natural gas). 21. Not used. 22. Delete if the selected fuel for the boilers is gas. 23. Delete if the selected fuel for the boilers is No. 2 fuel oil. 24. Delete requirement for induced draft fan when this type of system is not used in the project. 25. Delete where the gas service is located outdoors. 26. For burner projects, Engineer of Record shall insert the required efficiencies into this Article from the referenced boiler Sections and then delete references to the boiler Sections. 27. Edit as required if no BMS/DDC system is to be provided. 28. This paragraph is intended for projects that must comply with the NYC Green Schools Rating System (generally all capacity projects) and the following CIP projects: a. b. HVAC upgrades (boiler replacements/ BMS/DDC Systems DDC-only systems/ AC upgrades, etc) Temperature Control systems 29. Designer shall show on the Electrical Drawing Set the required wiring (twisted pair, AWG#16) from the boiler control panels to the Alarm digital communicator (auto-dialer). Reference Electrical Design Requirement 7.3.14. 30. Edit as required. Fuel oil burning equipment rooms shall be equipped with automatic heat detection in accordance with Sections BC 907, MC 1305.3.4 and MC 1305.13.3.3. Div 16 Contractor (refer to Section 16720) shall wire heat detectors to Fire Alarm Panel to automatically shut-down the transfer pumps if excessive heat is detected. Mechanical Contractor shall coordinate with Division 16 Contractor for transfer pump shutdown. The above is applicable to all CIP projects coupled with a fire alarm replacement project or where the existing fire alarm system is expandable. NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 42 05/15/15 31. DESIGN NO. _____ Drawings shall show the remote audio/visual alarms located outside of the Boiler Room adjacent to the main door of the Boiler Room. NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 43 05/15/15 DESIGN NO. _____ LIST OF SUBMITTALS SUBMITTAL DATE SUBMITTED DATE APPROVED Product Data: ______________ _____________ Shop Drawings: ______________ _____________ 1. Wiring Diagrams ______________ _____________ Test Report: ______________ _____________ 1. Manufacturers Product Data 2. Installation Instructions 3. Capacities 1. Field Test and Inspection Reports Certificates: ______________ _____________ 1. 2. 3. 4. DEP Permit Burner Listing DEP Certificate of Compliance DEP Certificate of Operation (or Registration as applicable) 5. Start-up and demonstration affidavit Contract Closeout Submittals: ______________ _____________ 1. Operating Instruction Manuals 2. Framed Piping and Wiring Diagrams 3. Maintenance manual 22 Maintenance Materials: ______________ _____________ Manufacturer’s Guarantees: ______________ _____________ * * * NYCSCA FUEL BURNING/PUMPING EQUIPMENT (FOR STEAM BOILERS) 15592 - 44