Loren Data's SAM Daily™

SAMDAILY.US - ISSUE OF DECEMBER 08, 2021 SAM #7312
MODIFICATION

Z -- Boiler replacement-VA Regional Office. Jackson, MS.

Notice Date

12/6/2021 7:33:29 AM
 

Notice Type

Solicitation
 

NAICS

238220 — Plumbing, Heating, and Air-Conditioning Contractors
 

Contracting Office

VBA FIELD CONTRACTING (36C10E) WASHINGTON DC 20006 USA
 

ZIP Code

20006
 

Solicitation Number

36C10E22R0001
 

Response Due

1/4/2022 1:00:00 PM
 

Archive Date

03/05/2022
 

Point of Contact

Jeffrey A Reed, Contract Specialist
 

E-Mail Address

jeffrey.reed@va.gov
(jeffrey.reed@va.gov)
 

Awardee

null
 

Description

26 October 2021 STATEMENT OF WORK FOR Boiler Replacement for Jackson Regional Office GENERAL DESCRIPTION: Background. The Department of Veterans Affairs Regional Office (VARO) located at 1600 East Woodrow Wilson Ave, Jackson Mississippi, 39216 has a need to replace one (1) boiler. Purpose. The purpose of this Statement of Work is to define the tasks necessary for completing the replacement of the old Superior Boiler at the Jackson Regional Office. The Period of Performance is thirty (30) days from the issuance of the Notice to Proceed. Objective. In accordance with the terms of this contract, the Contractor shall be required to furnish all necessary tools, labor, materials, supplies, equipment, services, and supervision to accomplish all tasks necessary for the performance of the work set forth in this Statement of Work (SOW). These services include, but are not limited to: equipment delivery, installation and removal, testing, supplies, maintenance, and documentation necessary for the successful completion of the work. Training for personnel using this equipment is also required. Accuracy of Measurement. The contractor is responsible for the accuracy of all measurements taken for proper installation of equipment. The Contractor shall verify all measurements relating to the required work prior to submission of their cost proposal to the Contracting Officer. SCOPE OF WORK: Contractor shall perform the following work: Submittals. A. Product Data: Include performance data, operating characteristics, furnished specialties and accessories. 1. Prior to flue vent installation, engineered calculations and drawings must be submitted to Architect/Engineer to thoroughly demonstrate that size and configuration conform to recommended size, length and footprint for each submitted boiler. B. Efficiency Curves: At a minimum, submit efficiency curves for 100%, 50% and 7% input firing rates at incoming water temperatures ranging from 80°F to 160°. C. Pressure Drop Curve. Submit pressure drop curve for the following flow ranges per designated capacities below 1500-2000 MBH: 25-350 GPM D. Shop Drawings: For boilers, boiler trim and accessories include: Plans, elevations, sections, details and attachments to other work Wiring Diagrams for power, signal and control wiring E. Source Quality Control Test Reports: Reports shall be included in submittals. F. Field Quality Control Test Reports: Reports shall be included in submittals. G. Operation and Maintenance Data: Data to be included in boiler emergency, operation and maintenance manuals. H. Warranty: Standard warranty specified in this Section I. Other Informational Submittals: 1. ASME Stamp Certification and Report: Submit ""H"" stamp certificate of authorization, as required by authorities having jurisdiction, and document hydrostatic testing of piping external to boiler. Existing Equipment Removal. 1. Prior to replacing the existing equipment, the Contractor shall coordinate the uninstall and the install with the Contract Officers Representative. Once schedule is approved, the Contractor will be responsible for disconnecting and removing any equipment being replaced or that is no longer needed from the area. Provide Equipment. MANUFACTURERS A. This specification is based on the Benchmark Standard Series boilers (1.5 MMBTU Benchmark Boiler Series with Edge [i] Control) as manufactured by AERCO International Inc. Equivalent units and manufacturers must meet all performance criteria, and will be considered upon prior approval. B. Basis-of-Design Product: Subject to compliance with requirements, provide AERCO International, Benchmark or Benchmark Platinum Series Boiler Models: BMK 750, 1000, 1500, 2000, 2500, 3000, 4000, 5000N, 5000, and 6000 (750,000 to 6,000,000 BTU/hr input) Approved Equals: AERCO Benchmark Platinum boilers BMK Bosch Buderus SB Series Superior Boiler - Creek Series Simons Boilers - FTC Titan Request for substitutions will be considered in accordance with provisions of Section 235216 - Condensing Boilers, in writing no less than 30 days prior to bid date. Note: Water tube boilers are not permitted without written approval. Request and written approval must be submitted and obtained 14 days prior to bid date. CONSTRUCTION A. Description: Boiler shall be either natural gas or dual fuel (nat. gas/propane) fired, fully condensing, fire tube design. Power burner shall have full modulation, discharge into a positive or negative pressure vent and the minimum firing rate shall not exceed the following per model: BMK1500: 75,000 BTU/hr input Boilers that have an input greater than what is specified above at minimum fire will not be considered. Boiler efficiency shall increase with decreasing load (output), while maintaining setpoint. Boiler shall be factory-fabricated, factory-assembled and factory-tested, fire-tube condensing boiler with heat exchanger sealed pressure-tight, built on a steel base, including insulated jacket, flue-gas vent, combustion-air intake connections, water supply, return and condensate drain connections, and controls. B. Heat Exchanger: The heat exchanger shall be constructed of 439 stainless steel fire tubes and tubesheets, with a one-pass combustion gas flow design. The fire tubes shall be 1/2 or 5/8 OD, with no less than 0.049 wall thickness. The upper and lower stainless steel tube sheet shall be no less than 0.25 thick. The pressure vessel/heat exchanger shall be welded construction. The heat exchanger shall be ASME stamped for a working pressure not less than 150 psig. Access to the tube sheets and heat exchanger shall be available by burner and exhaust manifold removal. Minimum access opening shall be no less than 8-inch diameter. C. Pressure Vessel: The pressure vessel shall have a maximum water volume per each model as listed below: BMK1500: 44 gallons (166.6 liters) The boiler water pressure drop shall not exceed the following per model size: BMK1500-2000: 3 psig @ 170 gpm The boiler water connections shall be flanged 150 pound, ANSI rated. BMK1500 - 3000: 4-inch flange The pressure vessel shall be constructed of ASME SA53 carbon steel, with a 0.25 inch thick wall and 0.50-inch-thick upper head. Inspection openings in the pressure vessel shall be in accordance with ASME Section IV pressure vessel code. The boiler shall be designed so that the thermal efficiency increases as the boiler firing rate decreases. Modulating Air/Fuel Valve and Burner: The boiler burner shall be capable of the following firing turndown ratios without loss of combustion efficiency or staging of gas valves. The turndown ratios shall be as follows and are based on BTU size: BMK1500: 20:1 The burner shall not operate above 7.5% oxygen level or 55% excess air. The burner shall produce less than 20 ppm of NOx, under standard calibration, corrected to 3% excess oxygen when firing on natural gas. The burner shall be metal fiber mesh covering a stainless-steel body with spark or proven pilot ignition and flame rectification. All burner material exposed to the combustion zone shall be of stainless-steel construction. There shall be no moving parts within the burner itself. A modulating air/fuel valve shall meter the air and fuel input. The modulating motor must be linked to both the gas valve body and air valve body with a single linkage. The linkage shall not require any field adjustment. A variable speed cast aluminum pre-mix blower shall be used to ensure the optimum mixing of air and fuel between the air/fuel valve and the burner. Fuel: The boiler shall use one of the following gas train options: Natural gas or propane: The unit gas train shall be specifically designed and calibrated for a single predetermined fuel. The gas train shall be a ventless gas train. Dual Fuel Capability. Dual fuel boiler (natural gas/propane) shall include a combustion system capable of operating on both Natural Gas and Propane. The boiler efficiency and turndown shall remain unchanged regardless of fuel source. The dual fuel system shall incorporate independent natural gas and propane gas trains and a fuel selector switch. This switching mechanism shall be such that it shall not be possible to flow both fuels simultaneously. The unit shall be calibrated to run on both fuel sources at start-up. No additional re-calibration shall be required when switching between fuel sources for a period of one year from the initial calibration G. Minimum boiler efficiencies shall be as follows at a 20-degree delta-T: EWT 100% Fire 50% Fire 7% Fire 160 °F 86.5% 87% 87% 140 °F 87% 87.5% 87.5% 120 °F 88.5% 89% 90% 100 °F 93.2% 94.5% 95.2% 80 °F 95.6% 96.8% 98.2% H. Exhaust Manifold: The exhaust manifold shall be of corrosion resistant cast aluminum or 316 stainless steel with the following diameter flue connections: BMK750-1500: 6 inches The exhaust manifold shall have a collecting reservoir and a gravity drain for the elimination of condensation. I. Blower: The boiler shall include a variable-speed, DC centrifugal fan to operate during the burner firing sequence and pre-purge the combustion chamber. Motors: Blower motors shall comply with requirements specified in Division 23 Section ""Common Motor Requirements for HVAC Equipment."" a. Motor Sizes: Minimum size as indicated. If not indicated, large enough so driven load will not require a motor to operate in the service factor range above 1.0. J. Ignition: Ignition shall be via spark or proven pilot ignition with 100 percent main-valve shutoff and electronic flame supervision. K. Combustion Air: The boiler shall be designed such that the combustion air is drawn from the inside of the boiler enclosure, decoupling it from the combustion air supply and preheating the air to increase efficiency. L. Combustion Air Filter: The boiler shall be equipped with an automotive high flow air filter to ensure efficient combustion and unhindered burner components operation. M. Enclosure: The plastic and sheet metal enclosure shall be fully removable, allowing for easy access during servicing. CONTROLS Refer to Division 23, Section Instrumentation and Control of HVAC. The boiler shall have an integrated boiler control that provides contact closure for its associated accessories including but not limited to pump, valve and air inlet damper. The control shall have a 5-inch color touch screen display as well as six function buttons that are separate from the display. User shall have the ability to navigate the menus via touchscreen or navigation buttons. fControls not equipped with navigation button options shall not be permitted. The control shall be equipped with a multi-color linear LED light to indicate the level of firing and/or air/fuel valve position. The control shall display two temperatures using two dedicated three-digit seven-segment displays. The control shall offer an Enable/Disable toggle switch as well as two buttons for Testing and Resetting the Low Water Cutoff. The Manager designated boiler control shall be capable of the following functions without the need for additional external controls: Sequence up to 16 boilers, Control boiler pumps and/or modulating motorized valves, Building Automation: The control shall be able to communicate to Building Management Systems using RS485 and communicate using Modbus RTU protocol. The control system shall be segregated into three components: Edge [i] Control Panel, Power Panel and Input/Output Connection Box. The entire system shall be Underwriters Laboratories recognized The control panel shall consist of seven individual circuit boards using surface-mount technology in a single enclosure. Each board shall be individually field replaceable. These circuit boards shall include: A microcontroller board with integrated 5-inch touchscreen color display providing the user interface. A 7-segment display board. This board includes two 3-digit 7-segment displays. These displays shall be used to view a variety of temperature sensor values and operating and startup function status. An Interface board connects the microcontroller board to internal components using ribbon cables. An electric low-water cutoff board connects to the test and manual reset functions on the microcontroller board. A power supply board is designed to provide the different DC voltages to the rest of the boards. It also acts as voltage regulator and reduce power noise. An ignition and combustion board. This board controls the air/fuel valve and Safety Shutoff Valve, flame status and ignition transformer A connector board used to connect all external electrical connection. Control settings transfer using USB: The control shall simplify and significantly lessen startup and boiler setting time by being able to use a USB flash drive to copy settings from one boiler to another boiler. Installers shall use successfully preconfigured boiler settings in their portfolio to newly installed boilers. Combustion calibration: The control shall offer at least 5 calibration points. The use of less than 5 calibration points is not permitted to improve overall system efficiency under all firing rates. Each combustion calibration point shall operate with 5 to 7% O2 levels to improve operating efficiency. Deviating away from these values shall not be acceptable. Unit and Plant Status: The control shall provide a quick view of the unit status and plant status. The unit status screen shall provide temperature setpoint, all water inlet and outlet and supply air and exhaust temperature sensors values. It shall also provide unit current and target firing rates. Additional screens shall display unit run hours, cycle count and average cycles per hour. The plant status screens shall provide plant temperature setpoint, plant water supply and return temperatures, outdoor temperature. Additionally, a status screen shall show the boiler status of each plant unit, plant firing rate. Unit and Plant event history: The manager control shall display the last 500 historical events per plant or 200 historical events for single unit installations. Software update: The control shall be capable of field software updates without a need for hardware component(s) replacement. This shall be performed either using software on a USB flash drive or via Internet connection. The software update mechanism shall be performed by a trained technician. The software update menus shall be secured using a password level. After the software update, the control shall retain all of its prior field settings. Copy settings from one boiler to the other: To significantly reduce installation time by reducing long repetitive work, the control shall have the capability of saving its settings to a USB flash drive. In addition, the control shall have the ability of copying new settings from a flash drive. The controls shall annunciate boiler and sensor status and include extensive self-diagnostic capabilities. The control panel shall incorporate three self-governing features designed to enhance operation in external control modes. When operating by an external control signal, the control panel can work to eliminate nuisance faults, such as over-temperature, resulting from improper external signal or loss of external signal. These features include: Setpoint High Limit: Setpoint high limit allows for a selectable maximum boiler outlet temperature and acts as temperature limiting governor. Setpoint limit is based on a PID function that automatically limits firing rate to maintain outlet temperature within a 0-to-10-degree selectable band from the desired maximum boiler outlet temperature. Setpoint Low Limit: Allow for a selectable minimum operating temperature. Failsafe Mode: Failsafe mode allows the boiler to switch its mode to operate from an internal setpoint if its external control signal is lost, rather than shut off. This is a selectable mode, enabling the control to shut off the unit upon loss of external signal, if so desired. The boiler control system shall incorporate the following additional features for enhanced external system interface: System start temperature feature Pump delay timer Remote interlock circuit Delayed interlock circuit Delta-T Limiter Freeze protection Fault relay for remote fault alarm Warm-weather shutdown The control shall offer multi-level user security access using different passwords. For additional security, the passwords shall expire if control display was not touched for an extended period 30 minutes. Each boiler shall include an electric, single-seated combination safety shutoff valve/regulator with proof of closure switch in its gas train. Each boiler shall incorporate dual over-temperature protection with manual reset, in accordance with ASME Section IV and CSD 1. Each boiler shall be equipped with TComp combustion air temperature compensation. If the combustion air temperature changes, the control system will automatically compensate for air density changes by adjusting the blower speed. This will adjust oxygen and optimize the combustion efficiency under all seasonal temperature changes. Boilers without air temperature compensation shall be deemed unacceptable. Each boiler shall be onAER ready with a standard Ethernet port and include a 5-year onAER subscription at no additional charge. AERCO s onAER service grants the user online access to real time operation and status of their system plant from any computer, tablet or mobile device along with the following capabilities: Efficiency status and trends Efficiency and performance optimization tips Preventative Maintenance alerts and scheduling Predictive Maintenance algorithms. Warning and error messages Weekly or monthly performance and status reports Manage multiple boiler plants or buildings Customizable dashboard Add email contacts for alerts and reports, including local AERCO trained technicians Manage and store startup, maintenance and service documentation The boiler manufacturer shall be able to provide a network hub or a network switch to connect up to 16 boilers to an online network. Each boiler shall have integrated Boiler Sequencing Technology (BST), capable of multi-unit sequencing with lead-lag functionality and parallel operation. The system will incorporate the following capabilities: Efficiently sequence 2 to 16 units on the same system to meet load requirement. Integrated control and wiring for seamless installation of optional isolation valve. When valves are utilized, the system shall operate one motorized valve per unit as an element of load sequencing. Valves shall close with decreased load as units turn off, with all opening under no-load conditions. Automatically rotate lead/lag amongst the units on the chain and monitor run hours per unit and balance load in an effort to equalize run hours among active units. Option to manually designate lead and last boiler Designated manager control, used to display and adjust key system parameters. Automatic bump-less transfer of manager function to next unit on the chain in case of designated manager unit failure; manager/client status should be shown on the individual unit displays. For boiler plants greater than 16 units, the Boiler Manufacturer shall supply as part of the boiler package a completely integrated AERCO Control System (ACS) to control all operation and energy input of the multiple boiler heating plant. The ACS shall be comprised of a microprocessor-based control utilizing the MODBUS protocol to communicate with the Boilers via the RS-485 port. One ACS controller shall have the ability to operate up to 32 AERCO boilers. The controller shall have the ability to vary the firing rate and energy input of each individual boiler throughout its full modulating range to maximize the condensing capability and thermal efficiency output of the entire heating plant. The ACS shall control the boiler outlet header temperature within +2ºF. The controller shall be a PID type controller and uses Ramp Up/Ramp Down control algorithm for accurate temperature control with excellent variable load response. The ACS controller shall provide contact closure for auxiliary equipment such as system pumps and combustion air inlet dampers based upon outdoor air temperature. The ACS shall have the following anti-cycling features: Manual designation of lead boiler and last boiler. Lead boiler rotation at user-specified time interval. Delay the firing/shutting down of boilers when header temperature within a predefined deadband. When set on Internal Setpoint Mode, temperature control setpoint on the ACS shall be fully field adjustable from 50ºF to 190ºF in operation. When set on Indoor/Outdoor Reset Mode, the ACS will operate on an adjustable inverse ratio in response to outdoor temperature to control the main header temperature. Reset ratio shall be fully field adjustable from 0.3 to 3.0 in operation. When set on 4ma to 20ma Temperature Control Mode, the ACS will operate the plant to vary header temperature setpoint linearly as an externally applied 4-20 ma signal is supplied. When set on MODBUS Temperature Control Mode, the ACS will operate the plant to vary header temperature setpoint as an external communication utilizing the MODBUS protocol is supplied via the RS-232 port. The ACS controller shall have a vacuum fluorescent display for monitoring of all sensors and interlocks. Non-volatile memory backup of all control parameters shall be internally provided as standard. The controller will automatically balance the sequence of operating time on each boiler by a first-on first-off mode and provide for setback and remote alarm contacts. Connection between central ACS system and individual boilers shall be twisted pair low voltage wiring, with the boilers daisy-chained for ease of installation. ELECTRICAL POWER Controllers, Electrical Devices and Wiring: Electrical devices and connections are specified in Division 26 sections. Single-Point Field Power Connection: Factory-installed and factory-wired switches, motor controllers, transformers and other electrical devices shall provide a single-point field power connection to the boiler. Electrical Characteristics: Electrical Specifications Models BMK750-2000 Voltage 120 V Phase 1 Frequency 60 Hz Full Load Current 13-16 Amps VENTING The exhaust vent must be UL Listed for use with Category II, III and IV appliances and compatible with operating temperatures up to 230°F, condensing flue gas service. UL listed vents of Polypropylene and Al 29-4C stainless steel must be used with boilers. PVC/CPVC is approved for use with BMK750-1000 models The minimum exhaust vent duct size for each boiler is six-inch (BMK750-1500), 8-inch diameter. Combustion-Air Intake: Boilers shall be capable of drawing combustion air from the outdoors via a metal or PVC duct connected between the boiler and the outdoors. The minimum ducted combustion air duct size for each boiler is six-inch (BMK750-1500), diameter. Common vent and common combustion air must be an available option for boiler installation. Consult manufacturer for common vent and combustion air sizing. Follow guidelines specified in manufacturer s venting guide. SOURCE QUALITY CONTROL Burner and Hydrostatic Test: Factory adjust burner to eliminate excess oxygen, carbon dioxide, oxides of nitrogen emissions and carbon monoxide in flue gas, and to achieve combustion efficiency. Perform hydrostatic testing. Test and inspect factory-assembled boilers, before shipping, according to ASME Boiler and Pressure Vessel Code. If boilers are not factory assembled and fire-tested, the local vendor is responsible for all field assembly and testing. Allow Owner access to source quality-control testing of boilers. Notify Architect fourteen days in advance of testing. Execution. EXAMINATION A. Before boiler installation examine roughing-in for concrete equipment bases, anchor-bolt sizes and locations and piping and electrical connections to verify actual locations, sizes and other conditions affecting boiler performance, maintenance and operations. Final boiler locations indicated on Drawings are approximate. Determine exact locations before roughing-in for piping and electrical connections. Examine mechanical spaces for suitable conditions where boilers will be installed. Proceed with installation only after unsatisfactory conditions have been corrected. BOILER INSTALLATION Install boilers level on concrete bases. Concrete base is specified in Division 23 Section ""Common Work Results for HVAC,"" and concrete materials and installation requirements are specified in Division 03. Install gas-fired boilers according to NFPA 54. Assemble and install boiler trim. Install electrical devices furnished with boiler but not specified to be factory mounted. Install control wiring to field-mounted electrical devices. CONNECTIONS Piping installation requirements are specified in other Division 23 sections. Drawings indicate general arrangement of piping, fittings and specialties. Install piping adjacent to boiler to permit service and maintenance. Install piping from equipment drain connection to nearest floor drain. Piping shall be at least full size of connection. Provide an isolation valve if required. Connect gas piping to boiler gas-train inlet with unions. Piping shall be at least full size of gas train connection. Provide a reducer if required. Connect hot water piping to supply and return boiler tappings with shutoff valve and union or flange at each connection. Install piping from safety relief valves to nearest floor drain. Boiler Venting Install flue venting kit and combustion-air intake. Connect venting full size to boiler connections. [Comply with requirements in Division 23 Section ""Breechings, Chimneys and Stacks.""] Ground equipment according to Division 26 Section ""Grounding and Bonding for Electrical Systems."" Connect wiring according to Division 26 Section ""Low-Voltage Electrical Power Conductors and Cables."" FIELD QUALITY CONTROL A. Perform tests and inspections and prepare test reports. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies and equipment installations, including connections, and to assist in testing. B. Tests and Inspections 1. Perform installation and startup checks according to manufacturer's written instructions. 2. Perform hydrostatic test. Repair leaks and retest until no leaks exist. 3. Start units to confirm proper motor rotation and unit operation. Adjust air-fuel ratio and combustion. 4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment. a. Check and adjust initial operating set points and high- and low-limit safety set points of fuel supply, water level and water temperature. b. Set field-adjustable switches and circuit-breaker trip ranges as indicated. C. Remove and replace malfunctioning units and retest as specified above. D. Occupancy Adjustments: When requested within 2 months of date of Substantial Completion, provide on-site assistance adjusting system to suit actual occupied conditions. Provide up to two visits to Project during other than normal occupancy hours for this purpose. E. Performance Tests: The boiler manufacturer is expected to provide partial load thermal efficiency curves. These thermal efficiency curves must include at least three separate curves at various BTU input levels. If these curves are not available, it is the responsibility of the boiler manufacturer to complete the following performance tests: Engage a factory-authorized service representative to inspect component assemblies and equipment installations, including connections, and to conduct performance testing. Boilers shall comply with performance requirements indicated, as determined by field performance tests. Adjust, modify, or replace equipment to comply. Perform field performance tests to determine capacity and efficiency of boilers. a. Test for full capacity. b. Test for boiler efficiency at [low fire, 20, 40, 60, 80, 100, 80, 60, 40 and 20] percent of full capacity. Determine efficiency at each test point. Repeat tests until results comply with requirements indicated. Provide analysis equipment required to determine performance. Provide temporary equipment and system modifications necessary to dissipate the heat produced during tests if building systems are not adequate. Notify Architect in advance of test dates. Document test results in a report and submit to Architect. Quality Assurance. A. Manufacturer Qualifications: The manufacturer must have been regularly engaged in the manufacture of condensing hydronic boilers for not less than thirty (30) years. The manufacturer must be headquartered in North America and manufacture pressure vessels in an ASME-certified facility wholly owned by the manufacturer. The specifying engineer, contractor and end customer must have the option to visit the factory to witness test fire and other relevant procedures B. Electrical Components, Devices and Accessories: Boilers must be listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use. C. AHRI Performance Compliance: Condensing boilers must be rated in accordance with applicable federal testing methods and is capable of achieving the energy efficiency and performance ratings within prescribed tolerances. D. ASME Compliance: Condensing boilers must be constructed in accordance with ASME Boiler and Pressure Vessel Code, Section IV Heating Boilers . E. ASHRAE/IESNA 90.1 Compliance: Boilers shall have minimum efficiency according to ""Gas and Oil-Fired Boilers - Minimum Efficiency Requirements."" F. DOE Compliance: Minimum efficiency shall comply with 10 CFR 430, Subpart B, Appendix N, ""Uniform Test Method for Measuring the Energy Consumption of Furnaces and Boilers."" G. UL Compliance: Boilers must be tested for compliance with UL 795, ""Commercial-Industrial Gas Heating Equipment."" Boilers shall be listed and labeled by a testing agency acceptable to authorities having jurisdiction. H. NOx Emission Standards: When installed and operated in accordance with manufacturer s instructions, the following condensing boiler models shall comply with the NOx emission standards outlined in South Coast Air Quality Management District (SCAQMD), Rule 1146.1; and the Texas Commission on Environmental Quality (TCEQ), Title 30, Chapter 117, and Rule 117.465 or the NOx emissions referenced below: BMK750-2000, BMK4000-6000: 9 ppm NOx corrected to 3% oxygen at all firing rates when firing on natural gas Warranty. A. Standard Warranty: Boilers shall include manufacturer's standard form in which manufacturer agrees to repair or replace components of boilers that fail in materials or workmanship within specified warranty period. Warranty Period for Fire-Tube Condensing Boilers The pressure vessel/heat exchanger shall carry a 10 year from shipment, non-prorated, limited warranty against any failure due to condensate corrosion, thermal stress, mechanical defects or workmanship. The pressure vessel is warranted against failure due to thermal shock for 20 years from date of shipment. The burner shall be conditionally guaranteed against any failure for (5) years from shipment. Manufacturer labeled control panels are conditionally warranted against failure for (2) two years from shipment. All other components, with the exception of the igniter, flame detector and O2 sensor, are conditionally guaranteed against any failure for (18) eighteen months from shipment. Field Services. Contractor shall provide the services of a local factory authorized representative to supervise all phases of equipment startup. A letter of compliance with all factory recommendations and installation instructions shall be submitted to the engineer with operation and maintenance instructions. Training on Equipment The Contractor will provide a training session on all newly installed equipment for the Support Service Staff of the...
 

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Record

SN06191398-F 20211208/211206230118 (samdaily.us)
 

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