BID DOCUMENTS FOR LINCOLN HIGH SCHOOL MECHANICAL EQUIPMENT PRE-PURCHASE 2600 SW 9 TH STREET DES MOINES, IOWA BID B7427 CONDENSING BOILERS

BID DOCUMENTS FOR LINCOLN HIGH SCHOOL MECHANICAL EQUIPMENT PRE-PURCHASE 2600 SW 9 TH STREET DES MOINES, IOWA BID B7427 CONDENSING BOILERS BID B7428 DOMESTIC WATER HEATERS BID B7429 POOL HEATER Owner Des Moines Independent Community School District 1917 Dean Avenue Des Moines, Iowa 50316

NOTICE OF LETTING LINCOLN HIGH SCHOOL MECHANICAL EQUIPMENT PRE-PURCHASE NOTICE IS HEREBY GIVEN: Sealed proposals will be received by the Purchasing Agent of the Des Moines Independent Community School District at his office, Des Moines Independent Community School District 1915 Prospect Road, Suite 1200, Des Moines, Iowa 50310 until three o'clock p.m. on the 11th day of April, 2016, for the pre-purchase of the following mechanical equipment for a mechanical upgrade project at Lincoln High School. Bid No. B7427 Condensing Boilers Bid No. B7428 Fuel Fired Domestic Water Heaters Bid No. B7429 Pool Heater Commencing March 30, 2016 copies of the bid documents are on file with and available from the Des Moines Public Schools 1917 Dean Avenue Des Moines, Iowa 50316. Bids must be submitted on the approved bid form available in the bid packet. No oral, facsimile, telegraphic or telephonic bids or modifications will be considered. Lump-sum bids will be received as indicated in the scope of work. Bids will be opened and read aloud immediately after specified closing time for receiving bids. All interested parties are invited to attend. Consideration of the bids received and the award of bids or other action may be made by the Board of Directors of the Des Moines Independent Community School District upon the proposals received in accordance with the law and the bid documents at its meeting to be held at 6:00 p.m. on April 19, 2016 in the District Board Room at 1800 Grand Avenue Des Moines Iowa or at any other published and/or posted location of the Board meeting. The Board of Directors may make the award to the lowest responsive, responsible bidder meeting specifications. The right is reserved to reject any or all bids, or any part thereof, and to waive informalities, and to enter into such purchase orders as shall be deemed in the best interests of the Des Moines Independent Community School District. By virtue of statutory authority, a preference will be given to products and provisions grown and coal produced within the State of Iowa, and to Iowa domestic labor. All bids will be governed by applicable provisions in the Iowa Code and Board Policies. Secretary of the Board Des Moines Independent Community School District

DES MOINES PUBLIC SCHOOLS LINCOLN HIGH SCHOOL MECHANICAL EQUIPMENT PRE-PURCHASE Scope of Work - March 30, 2016 Bid # B7427 Condensing Boilers Bid # B7428 Fuel Fired Domestic Water Heaters Bid # B7429 Pool Heater The Des Moines School District is seeking bids for pre-purchase of certain mechanical equipment for an upcoming mechanical upgrade at Lincoln High School. DOCUMENTS PROVIDED: 1. Notice of Letting 1 page 2. Scope of Work 2 pages 3. Bid Form 2 pages 4. Non Collusion Affidavit 1 page (complete, notarize and submit with bid) 5. Bidders Status Form 2 pages (complete and submit with bid) 6. TSB Form 2 pages (complete, notarize and submit with bid) 7. Specifications Section 220600 Pool Heater Section 223400 Fuel Fired Domestic Water Heaters Section 235216 Condensing Boilers 8. Three Equipment Schedules Pool heater, Fuel Fired Domestic Water Heaters and Condensing Boilers 9. DMPS standard terms and conditions found on its website at: dmschools.org/departments/operations/purchasing & central stores / open proposals click here near the top of the page. REQUIREMENTS: 1. Submit a signed quotation on the attached bid form. Bids are due at the time and location listed in the Notice of Letting. Include the completed TSB form, the Non Collusion Form and the Bidders Status Form with the bid. 2. Questions shall be directed in writing to douglas.ohde@dmschools.org 3. The successful firm will be notified on April 20, 2016. 4. The District will make award to bidders for each of the different bids separately or the District at its discretion can award more than one bid to a supplier based upon low combination pricing provided. 5. A purchase order for each award will be provided from the Des Moines Public Schools. Exclude all State of Iowa sales taxes and use taxes from your proposal. The District will provide a tax exempt certificate with the purchase order. 6. No bid bonds, performance bonds, or payment bonds are required. 7. All bids shall include freight charges for delivery free on board trucks at Lincoln High School 2600 SW 9 th Street, Des Moines Iowa 50315 for unloading by the district s contractor. 8. The District will pay for stored equipment in a bonded warehouse in Des Moines upon evidence that the full value is covered by insurance. If the equipment is temporarily stored, the quote shall include the costs to deliver the equipment on trucks to Lincoln High School.

Page 2 Lincoln High School Mechanical Equipment Pre-purchase 9. The start of an overall one year warranty period for all equipment shall be the date of substantial completion of the mechanical contract in mid fall of 2016. Extended warranties shall be as indicated in each specification section and the warranty period shall also start at the date of substantial completion. 10. The mechanical equipment shall be available for delivery to the school on June 15, 2016. Delivery date shall be confirmed on the bid form where indicated. 11. The price shall include all submittals for approval by the mechanical engineers KPE Engineering 12. Awarded bidder shall coordinate with the selected mechanical contractor by providing submittals, delivery coordination, and field requirements. 13. The price shall include all field quality control and demonstration items required of the manufacturer as called out in the specifications to include in part startup and owner training. END OF DOCUMENT

BID FORM BIDS DUE NOT LATER THAN 3:00 PM ON APRIL 11, 2016 PROPOSAL FOR: Lincoln High School Mechanical Equipment Pre-Purchase Bid B7427 Condensing Boilers Bid B7428 Fuel Fired Domestic Water Heaters Bid B7429 Pool Heater TO: Des Moines Independent Community School District 1915 Prospect Road Suite 1200 Des Moines, IA 50310 SUBMITTED BY: Name of Bidder Des Moines Independent Community School District: The undersigned has examined the bid documents and hereby proposes and agrees to furnish and provide all products, materials, transportation, and services as required for the expeditious furnishing of the equipment required in conformity with this bid request. The undersigned agrees that bids, if accepted by the Owner, will be the basis for a purchase order(s) with the Owner. The Contractor shall comply with the terms and conditions of the District purchasing department. The undersigned further acknowledges the following Addenda: NO. NO. NO. DATE DATE DATE BID FOR CONDENSING BOILERS BID NO. B7427 The undersigned proposes to provide the equipment FOB jobsite as specified for the lump sum price as follows: PRICE EXCLUDING ALL TAXES - $ This bid is based upon utilizing the following equipment manufacturer Confirm delivery date of June 15, 2016 - Yes No - if no delivery date would be

BID FORM BID FOR FUEL FIRED DOMESTIC WATER HEATERS BID NO. B7428 The undersigned proposes to provide the equipment FOB jobsite as specified for the lump sum price as follows: PRICE EXCLUDING ALL TAXES - $ This bid is based upon utilizing the following equipment manufacturer Confirm delivery date of June 15, 2016 - Yes No - if no delivery date would be BID FOR POOL HEATER BID NO. B7429 The undersigned proposes to provide the equipment FOB jobsite as specified for the lump sum price as follows: PRICE EXCLUDING ALL TAXES - $ This bid is based upon utilizing the following equipment manufacturer Confirm delivery date of June 15, 2016 - Yes No - if no delivery date would be OPTION FOR A COMBINED BID (may combine 2 or 3 bids state bid numbers included in spots below) The undersigned proposes to provide the equipment FOB jobsite under bids B, B and B for a combined lump sum price as follows: PRICE EXCLUDING ALL TAXES - $ This bid is based upon utilizing the following equipment manufacturers as listed above for each quote. Delivery dates are as listed above for each quote. SUBMITTED BY: Name of Bidder Address: Phone # Fax # Email address (Authorized Signature)

DES MOINES INDEPENDENT NON-COLLUSION AFFIDAVIT COMMUNITY SCHOOL DISTRICT LINCOLN HIGH SCHOOL MECHANICAL EQUIPMENT PRE-PURCHASE NON-COLLUSION AFFIDAVIT The Bidder shall provide this affidavit: NON-COLLUSION AFFIDAVIT TO BE EXECUTED BY BIDDER AND SUBMITTED WITH BID State of Iowa ) ) ss. County of Polk ) (Name) being first duly sworn, deposes and says that he or she is of, (Title) (Bidder) the party making the foregoing bid that the bid is not made in the interest of, or on the behalf of, any undisclosed person, partnership, company, association, organization, or corporation; that the bid is genuine and not collusive or sham; that the bidder has not directly or indirectly induced or solicited any other bidder to put in a false or sham bid, and has not directly or indirectly colluded, conspired, connived, or agreed with any bidder or anyone else to put in a sham bid, or that anyone shall refrain from bidding; that the bidder has not in any manner, directly or indirectly, sought by agreement, communication, or conference with anyone to fix the bid price of the bidder or any other bidder, or to fix any overhead, profit, or cost element of the bid price, or of that of any other bidder, or to secure any advantage against the public body awarding the contract of anyone interested in the proposed contract; that all statements contained in the bid are true; and, further, that the bidder has not, directly or indirectly, submitted his or her bid price or any breakdown thereof, or the contents thereof, or divulged information or data relative thereto, or paid, and will not pay, any fee to any corporation, partnership, company association, organization, bid depository, or to any member or agent thereto to effectuate a collusive or sham bid." The undersigned certifies under penalty of perjury that the foregoing is true and correct; THIS STATEMENT MUST BE NOTARIZED. NAME OF BIDDER: BY: Signature Title Type/Print Name Date STATE OF, COUNTY, ss: Subscribed and sworn to before me by the said day of, 2016. on this Notary Public in and for the State of

DES MOINES INDEPENDENT TSB FORM COMMUNITY SCHOOL DISTRICT Page 1 LINCOLN HIGH SCHOOL MECHANICAL EQUIPMENT PRE-PURCHASE Bidder is / is not a certified Iowa Targeted Small Business, (TSB). Bidder's Company Name Telephone No. Address City State Zip Signature (Same person who signs proposal) Title Type/Print Name Date THIS STATEMENT MUST BE NOTARIZED. STATE OF, COUNTY, ss: day of Subscribed and sworn to before me by the said, 201_. on this Notary Public in and for the State of

Bidder Status Form To be completed by all bidders Please answer Yes or No for each of the following: Yes Yes Yes Yes Yes No No No No No Des Moines Independent Community School District NON-COLLUSION AFFIDAVIT Document 00314-1 My company s office in Iowa is suitable for more than receiving mail, telephone calls, and e-mail. My company has been conducting business in Iowa for at least 3 years prior to the first request for bids on this project. My company is not a subsidiary of another business entity or my company is a subsidiary of another business entity that would qualify as a resident bidder in Iowa. Part A My company is authorized to transact business in Iowa. (To help you determine if your company is authorized, please review the worksheet on the next page). My company has an office to transact business in Iowa. If you answered Yes for each question above, your company qualifies as a resident bidder. Please complete Parts B and D of this form. If you answered No to one or more questions above, your company is a nonresident bidder. Please complete Parts C and D of this form. To be completed by resident bidders My company has maintained offices in Iowa during the past 3 years at the following addresses: Part B Dates: Dates: / / to / / Address: City, State, Zip: / / to / / Address: City, State, Zip: Dates: / / to / / Address: You may attach additional sheet(s) if needed. To be completed by non-resident bidders City, State, Zip: Part C 1. Name of home state or foreign country reported to the Iowa Secretary of State: 2. Does your company s home state or foreign country offer preferences to bidders who are residents? Yes No 3. If you answered Yes to question 2, identify each preference offered by your company s home state or foreign country and the appropriate legal citation. You may attach additional sheet(s) if needed. To be completed by all bidders Part D I certify that the statements made on this document are true and complete to the best of my knowledge and I know that my failure to provide accurate and truthful information may be a reason to reject my bid. Firm Name: Signature: Date: You must submit the completed form to the governmental body requesting bids per 875 Iowa Administrative Code Chapter 156. This form has been approved by the Iowa Labor Commissioner. 309-6001 02-14

Des Moines Independent Community School District NON-COLLUSION AFFIDAVIT Document 00314-2 Worksheet: Authorization to Transact Business This worksheet may be used to help complete Part A of the Resident Bidder Status form. If at least one of the following describes your business, you are authorized to transact business in Iowa. Yes No My business is currently registered as a contractor with the Iowa Division of Labor. Yes No My business is a sole proprietorship and I am an Iowa resident for Iowa income tax purposes. Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No No No No My business is a general partnership or joint venture. More than 50 percent of the general partners or joint venture parties are residents of Iowa for Iowa income tax purposes. My business is an active corporation with the Iowa Secretary of State and has paid all fees required by the Secretary of State, has filed its most recent biennial report, and has not filed articles of dissolution. My business is a corporation whose articles of incorporation are filed in a state other than Iowa, the corporation has received a certificate of authority from the Iowa secretary of state, has filed its most recent biennial report with the secretary of state, and has neither received a certificate of withdrawal from the secretary of state nor had its authority revoked. My business is a limited liability partnership which has filed a statement of qualification in this state and the statement has not been canceled. My business is a limited liability partnership which has filed a statement of qualification in a state other than Iowa, has filed a statement of foreign qualification in Iowa and a statement of cancellation has not been filed. My business is a limited partnership or limited liability limited partnership which has filed a certificate of limited partnership in this state, and has not filed a statement of termination. My business is a limited partnership or a limited liability limited partnership whose certificate of limited partnership is filed in a state other than Iowa, the limited partnership or limited liability limited partnership has received notification from the Iowa secretary of state that the application for certificate of authority has been approved and no notice of cancellation has been filed by the limited partnership or the limited liability limited partnership. My business is a limited liability company whose certificate of organization is filed in Iowa and has not filed a statement of termination. My business is a limited liability company whose certificate of organization is filed in a state other than Iowa, has received a certificate of authority to transact business in Iowa and the certificate has not been revoked or canceled. 309-6001 02-14

POOL HEATER LINCOLN HIGH SCHOOL PRE-PURCHASE 220600-1 SECTION 220600 POOL HEATER PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section Includes: 1. Gas-fired, pool heater 1.3 ACTION SUBMITTALS A. Product Data: For each type and size of pool heater indicated. Include rated capacities, operating characteristics, electrical characteristics, and furnished specialties and accessories. B. Shop Drawings: 1. Wiring Diagrams: For power, signal, and control wiring. 1.4 INFORMATIONAL SUBMITTALS A. Product Certificates: For each type of gas-fired, pool heater B. Pool-Water Heater Labeling: Certified and labeled by testing agency acceptable to authorities having jurisdiction. C. Source quality-control reports. D. Field quality-control reports. E. Warranty: Sample of special warranty. 1.5 CLOSEOUT SUBMITTALS A. Operation and Maintenance Data: For fuel-fired, pool heaters to include in emergency, operation, and maintenance manuals.

POOL HEATER LINCOLN HIGH SCHOOL PRE-PURCHASE 220600-2 1.6 QUALITY ASSURANCE A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. B. ASME Compliance: 1. Where ASME-code construction is indicated, fabricate and label commercial, pool heaters to comply with ASME Boiler and Pressure Vessel Code. C. ANSI Z21.56/CSA 4.7 1.7 COORDINATION A. Coordinate sizes and locations of concrete bases with actual equipment provided. 1.8 WARRANTY A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of fuel-fired, pool heaters that fail in materials or workmanship within specified warranty period. 1. Failures include, but are not limited to, the following: a. Structural failures including storage tank and supports. b. Faulty operation of controls. c. Deterioration of metals, metal finishes, and other materials beyond normal use. 2. Warranty Periods: From date of Substantial Completion. a. Gas-Fired, Pool Heaters: 1) Heat Exchanger: Ten years. 2) Controls and Other Components: Two years. 3) Thermal Shock: Twenty years PART 2 - PRODUCTS 2.1 GAS-FIRED, POOL HEATER A. Manufacturers: Subject to compliance with requirements, provide products by the following: 1. Laars 2. Raypak 3. Lochinvar. B. General: 1. Fuel Type: Natural Gas.

POOL HEATER LINCOLN HIGH SCHOOL PRE-PURCHASE 220600-3 2. Pressure Rating: 150 psig. 3. Heat Exchanger: Cupro-Nickel. 4. Jacket: Metal, with enameled finish, or plastic. 5. Burner: For use with pool heater. 6. Venting: Direct Vent appliance with sealed combustion, intake and exhaust piping. 7. Automatic Ignition: Manufacturer's proprietary system for automatic, gas ignition. 8. Temperature Control: Adjustable thermostat. 9. Mixing valve: Integral valve with controls to maintain minimum water temperature entering heat exchanger. C. Controls: water heater system shall have an onboard control interface to include following: 1. Operation of low water temperature of 105 degrees F. 2. Building management integration 3. Low water flow safety. 4. High limit control 5. Inlet outlet temperature readout. 6. Error code display 7. Automatic gas valve control. D. Pool Heater pump: 1. Integral pump allowing for circulation of pool water through heater. 2. Pump shall be part of the pool heater and wired for control. 2.2 SOURCE QUALITY CONTROL A. Factory Tests: Test and inspect assembled pool heaters specified to be ASME-code construction, according to ASME Boiler and Pressure Vessel Code. B. Hydrostatically test commercial pool heaters to minimum of one and one-half times pressure rating before shipment. C. Prepare test and inspection reports. PART 3 - EXECUTION 3.1 POOL HEATER INSTALLATION A. Commercial, Pool Heater Mounting: Install commercial pool heaters on concrete base. 1. Exception: Omit concrete bases for commercial pool heaters if installation on stand, bracket, suspended platform, or directly on floor is indicated. 2. Maintain manufacturer's recommended clearances. 3. Arrange units so controls and devices that require servicing are accessible. 4. Install dowel rods to connect concrete base to concrete floor. Unless otherwise indicated, install dowel rods on 18-inch centers around the full perimeter of concrete base. 5. For supported equipment, install epoxy-coated anchor bolts that extend through concrete base and anchor into structural concrete floor.

POOL HEATER LINCOLN HIGH SCHOOL PRE-PURCHASE 220600-4 6. Place and secure anchorage devices. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded. 7. Install anchor bolts to elevations required for proper attachment to supported equipment. 8. Anchor pool heaters to substrate. B. Install pool heaters level and plumb, according to layout drawings, original design, and referenced standards. Maintain manufacturer's recommended clearances. Arrange units so controls and devices needing service are accessible. C. Install gas-fired, pool heaters according to NFPA 54. 1. Install gas shutoff valves on gas supply piping to gas-fired, pool heaters without shutoff valves. 2. Install gas pressure regulators on gas supplies to gas-fired, pool heaters without gas pressure regulators if gas pressure regulators are required to reduce gas pressure at burner. 3. Install automatic gas valves on gas supplies to gas-fired, pool heaters if required for operation of safety control. 4. Comply with requirements for gas shutoff valves, gas pressure regulators, and automatic gas valves specified in Section 231123 "Facility Natural-Gas Piping." D. Install combination temperature-and-pressure relief valves in water piping for pool heaters without storage. Extend commercial-water-heater relief-valve outlet, with drain piping same as domestic-water piping in continuous downward pitch, and discharge by positive air gap onto closest floor drain. E. Install pool heater drain piping as indirect waste to spill by positive air gap into open drains or over floor drains. Install hose-end drain valves at low points in water piping for pool heaters that do not have tank drains. F. Install thermometer on outlet piping of pool heaters. G. Fill pool heaters with water. 3.2 CONNECTIONS A. Comply with requirements for gas piping specified in Section 231123 "Facility Natural-Gas Piping." B. Drawings indicate general arrangement of piping, fittings, and specialties. C. Where installing piping adjacent to fuel-fired, pool heaters, allow space for service and maintenance of pool heaters. Arrange piping for easy removal of pool heaters. 3.3 FIELD QUALITY CONTROL A. Perform tests and inspections. 1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing. 2. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.

POOL HEATER LINCOLN HIGH SCHOOL PRE-PURCHASE 220600-5 3. Operational Test: After electrical circuitry has been energized, start units to confirm proper operation. 4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment. B. Prepare test and inspection reports. 3.4 DEMONSTRATION A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain gas-fired, pool heaters. END OF SECTION 220600

FUEL-FIRED, DOMESTIC-WATER HEATERS LINCOLN HIGH SCHOOL PRE-PURCHASE 223400-1 SECTION 223400 - FUEL-FIRED, DOMESTIC-WATER HEATERS PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section Includes: 1. Gas-fired, tankless, domestic-water heaters. 2. Domestic-water heater accessories. 1.3 ACTION SUBMITTALS A. Product Data: For each type and size of domestic-water heater indicated. Include rated capacities, operating characteristics, electrical characteristics, and furnished specialties and accessories. B. Shop Drawings: 1. Wiring Diagrams: For power, signal, and control wiring. 1.4 INFORMATIONAL SUBMITTALS A. Product Certificates: For each type of gas-fired, tankless, domestic-water heater, from manufacturer. B. Domestic-Water Heater Labeling: Certified and labeled by testing agency acceptable to authorities having jurisdiction. C. Source quality-control reports. D. Field quality-control reports. E. Warranty: Sample of special warranty. 1.5 CLOSEOUT SUBMITTALS A. Operation and Maintenance Data: For fuel-fired, domestic-water heaters to include in emergency, operation, and maintenance manuals.

FUEL-FIRED, DOMESTIC-WATER HEATERS LINCOLN HIGH SCHOOL PRE-PURCHASE 223400-2 1.6 QUALITY ASSURANCE A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. B. ASHRAE/IESNA Compliance: Fabricate and label fuel-fired, domestic-water heaters to comply with ASHRAE/IESNA 90.1. C. ASME Compliance: 1. Where ASME-code construction is indicated, fabricate and label commercial, domestic-water heater storage tanks to comply with ASME Boiler and Pressure Vessel Code: Section VIII, Division 1. 2. Where ASME-code construction is indicated, fabricate and label commercial, finned-tube, domestic-water heaters to comply with ASME Boiler and Pressure Vessel Code: Section IV. D. NSF Compliance: Fabricate and label equipment components that will be in contact with potable water to comply with NSF 61 Annex G, "Drinking Water System Components - Health Effects." 1.7 COORDINATION A. Coordinate sizes and locations of concrete bases with actual equipment provided. 1.8 WARRANTY A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of fuel-fired, domestic-water heaters that fail in materials or workmanship within specified warranty period. 1. Failures include, but are not limited to, the following: a. Structural failures including storage tank and supports. b. Faulty operation of controls. c. Deterioration of metals, metal finishes, and other materials beyond normal use. 2. Warranty Periods: From date of Substantial Completion. a. Gas-Fired, Tankless, Domestic-Water Heaters: 1) Heat Exchanger: Ten years. 2) Controls and Other Components: Two years. PART 2 - PRODUCTS 2.1 GAS-FIRED, TANKLESS, DOMESTIC-WATER HEATERS A. Manufacturers: Subject to compliance with requirements, provide products by the following:

FUEL-FIRED, DOMESTIC-WATER HEATERS LINCOLN HIGH SCHOOL PRE-PURCHASE 223400-3 1. Intellihot 2. Aerco 3. Lochinvar. B. Standard: ANSI Z21.10.3/CSA 4.3 for gas-fired, instantaneous, domestic-water heaters for indoor application. C. Construction: Copper piping or tubing complying with NSF 61 Annex G barrier materials for potable water, without or minimal storage capacity. 1. Tappings: ASME B1.20.1 pipe thread. 2. Pressure Rating: 150 psig. 3. Heat Exchanger: Stainless Steel 316L. 4. Insulation: Comply with ASHRAE/IESNA 90.1. 5. Jacket: Metal, with enameled finish, or plastic. 6. Burner: For use with tankless, domestic-water heaters and natural-gas fuel. 7. Automatic Ignition: Manufacturer's proprietary system for automatic, gas ignition. 8. Temperature Control: Adjustable thermostat. D. Support: Bracket for wall mounting. E. Controls: water heater system shall have an onboard control interface to include following: 1. Cascade sequencing 2. Building management integration 3. Low water flow safety 4. Inlet outlet temperature readout. 5. Error code display 6. Automatic gas valve control. 2.2 DOMESTIC-WATER HEATER ACCESSORIES A. Domestic-Water Compression Tanks: 1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to the following: a. AMTROL, Inc. b. Pentair Pump Group. c. Smith, A. O. Corporation. d. Taco, Inc. 2. Description: Steel, pressure-rated tank constructed with welded joints and factory-installed butylrubber diaphragm. Include air precharge to minimum system-operating pressure at tank. 3. Construction: a. Tappings: Factory-fabricated steel, welded to tank before testing and labeling. Include ASME B1.20.1 pipe thread. b. Interior Finish: Comply with NSF 61 Annex G barrier materials for potable-water tank linings, including extending finish into and through tank fittings and outlets.

FUEL-FIRED, DOMESTIC-WATER HEATERS LINCOLN HIGH SCHOOL PRE-PURCHASE 223400-4 c. Air-Charging Valve: Factory installed. B. Drain Pans: Corrosion-resistant metal with raised edge. Comply with ANSI/CSA LC 3. Include dimensions not less than base of domestic-water heater, and include drain outlet not less than NPS 3/4 with ASME B1.20.1 pipe threads or with ASME B1.20.7 garden-hose threads. C. Piping-Type Heat Traps: Field-fabricated piping arrangement according to ASHRAE/IESNA 90.1. D. Heat-Trap Fittings: ASHRAE 90.2. E. Manifold Kits: Domestic-water heater manufacturer's factory-fabricated inlet and outlet piping for field installation, for multiple domestic-water heater installation. Include ball-, butterfly-, or gate-type shutoff valves to isolate each domestic-water heater and calibrated balancing valves to provide balanced flow through each domestic-water heater. F. Gas Shutoff Valves: ANSI Z21.15/CSA 9.1-M, manually operated. Furnish for installation in piping. G. Gas Pressure Regulators: ANSI Z21.18/CSA 6.3, appliance type. Include 2-psig pressure rating as required to match gas supply. H. Automatic Gas Valves: ANSI Z21.21/CSA 6.5, appliance, electrically operated, on-off automatic valve. I. Combination Temperature-and-Pressure Relief Valves: Include relieving capacity at least as great as heat input, and include pressure setting less than domestic-water heater working-pressure rating. Select relief valves with sensing element that extends into storage tank. 1. Gas-Fired, Domestic-Water Heaters: ANSI Z21.22/CSA 4.4-M. J. Pressure Relief Valves: Include pressure setting less than domestic-water heater working-pressure rating. 1. Gas-Fired, Domestic-Water Heaters: ANSI Z21.22/CSA 4.4-M. K. Vacuum Relief Valves: ANSI Z21.22/CSA 4.4-M. L. Domestic-Water Heater Stands: Manufacturer's factory-fabricated steel stand for floor mounting, capable of supporting domestic-water heater and water. Provide dimension that will support bottom of domesticwater heater a minimum of 18 inches above the floor. M. Domestic-Water Heater Mounting Brackets: Manufacturer's factory-fabricated steel bracket for wall mounting, capable of supporting domestic-water heater and water. 2.3 SOURCE QUALITY CONTROL A. Factory Tests: Test and inspect assembled domestic-water heaters specified to be ASME-code construction, according to ASME Boiler and Pressure Vessel Code. B. Hydrostatically test commercial domestic-water heaters to minimum of one and one-half times pressure rating before shipment. C. Prepare test and inspection reports.

FUEL-FIRED, DOMESTIC-WATER HEATERS LINCOLN HIGH SCHOOL PRE-PURCHASE 223400-5 PART 3 - EXECUTION 3.1 DOMESTIC-WATER HEATER INSTALLATION A. Commercial, Domestic-Water Heater Mounting: Install commercial domestic-water heaters on concrete base. 1. Exception: Omit concrete bases for commercial domestic-water heaters if installation on stand, bracket, suspended platform, or directly on floor is indicated. 2. Maintain manufacturer's recommended clearances. 3. Arrange units so controls and devices that require servicing are accessible. 4. Install dowel rods to connect concrete base to concrete floor. Unless otherwise indicated, install dowel rods on 18-inch centers around the full perimeter of concrete base. 5. For supported equipment, install epoxy-coated anchor bolts that extend through concrete base and anchor into structural concrete floor. 6. Place and secure anchorage devices. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded. 7. Install anchor bolts to elevations required for proper attachment to supported equipment. 8. Anchor domestic-water heaters to substrate. B. Install domestic-water heaters level and plumb, according to layout drawings, original design, and referenced standards. Maintain manufacturer's recommended clearances. Arrange units so controls and devices needing service are accessible. 1. Install shutoff valves on domestic-water-supply piping to domestic-water heaters and on domestichot-water outlet piping. Comply with requirements for shutoff valves specified in Section 220523.12 "Ball Valves for Plumbing Piping," Section 220523.13 "Butterfly Valves for Plumbing Piping," and Section 220523.15 "Gate Valves for Plumbing Piping." C. Install gas-fired, domestic-water heaters according to NFPA 54. 1. Install gas shutoff valves on gas supply piping to gas-fired, domestic-water heaters without shutoff valves. 2. Install gas pressure regulators on gas supplies to gas-fired, domestic-water heaters without gas pressure regulators if gas pressure regulators are required to reduce gas pressure at burner. 3. Install automatic gas valves on gas supplies to gas-fired, domestic-water heaters if required for operation of safety control. 4. Comply with requirements for gas shutoff valves, gas pressure regulators, and automatic gas valves specified in Section 231123 "Facility Natural-Gas Piping." D. Install combination temperature-and-pressure relief valves in water piping for domestic-water heaters without storage. Extend commercial-water-heater relief-valve outlet, with drain piping same as domesticwater piping in continuous downward pitch, and discharge by positive air gap onto closest floor drain. E. Install water-heater drain piping as indirect waste to spill by positive air gap into open drains or over floor drains. Install hose-end drain valves at low points in water piping for domestic-water heaters that do not have tank drains. Comply with requirements for hose-end drain valves specified in Section 221119 "Domestic Water Piping Specialties."

FUEL-FIRED, DOMESTIC-WATER HEATERS LINCOLN HIGH SCHOOL PRE-PURCHASE 223400-6 F. Install thermometer on outlet piping of domestic-water heaters. Comply with requirements for thermometers specified in Section 220519 "Meters and Gages for Plumbing Piping." G. Assemble and install inlet and outlet piping manifold kits for multiple domestic-water heaters. Fabricate, modify, or arrange manifolds for balanced water flow through each domestic-water heater. Include shutoff valve and thermometer in each domestic-water heater inlet and outlet, and throttling valve in each domestic-water heater outlet. H. Install piping-type heat traps on inlet and outlet piping of domestic-water heater storage tanks without integral or fitting-type heat traps. I. Fill domestic-water heaters with water. J. Charge domestic-water compression tanks with air. 3.2 CONNECTIONS A. Comply with requirements for domestic-water piping specified in Section 221116 "Domestic Water Piping." B. Comply with requirements for gas piping specified in Section 231123 "Facility Natural-Gas Piping." C. Drawings indicate general arrangement of piping, fittings, and specialties. D. Where installing piping adjacent to fuel-fired, domestic-water heaters, allow space for service and maintenance of water heaters. Arrange piping for easy removal of domestic-water heaters. 3.3 FIELD QUALITY CONTROL A. Perform tests and inspections. 1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing. 2. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist. 3. Operational Test: After electrical circuitry has been energized, start units to confirm proper operation. 4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment. B. Domestic-water heaters will be considered defective if they do not pass tests and inspections. Comply with requirements in Section 014000 "Quality Requirements" for retesting and reinspecting requirements and Section 017300 "Execution" for requirements for correcting the Work. C. Prepare test and inspection reports.

FUEL-FIRED, DOMESTIC-WATER HEATERS LINCOLN HIGH SCHOOL PRE-PURCHASE 223400-7 3.4 DEMONSTRATION A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain gas-fired, tankless domestic-water heaters. END OF SECTION 223400

CONDENSING BOILERS LINCOLN HS STEAM PRE-PURCHASE 235216-1 SECTION 235216 - CONDENSING BOILERS PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section includes gas-fired, fire-tube, or water-tube condensing boilers, trim, and accessories for generating hot water. 1.3 ACTION SUBMITTALS A. Product Data: For each type of product. 1. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for boilers. 2. Include rated capacities, operating characteristics, and furnished specialties and accessories. B. Shop Drawings: For boilers, boiler trim, and accessories. 1. Include plans, elevations, sections, and mounting details. 2. Include details of equipment assemblies. Indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection. 3. Include diagrams for power, signal, and control wiring. C. Delegated-Design Submittal: For each boiler. 1. Design calculations and vibration isolation base details, signed and sealed by a qualified professional engineer. a. Design Calculations: Calculate requirements for selecting vibration isolators and seismic restraints and for designing vibration isolation bases. b. Vibration Isolation Base Details: Detail fabrication, including anchorages and attachments to structure and to supported equipment. Include adjustable motor bases, rails, and frames for equipment mounting. 1.4 INFORMATIONAL SUBMITTALS A. Source quality-control reports. B. Field quality-control reports.

CONDENSING BOILERS LINCOLN HS STEAM PRE-PURCHASE 235216-1 C. Sample Warranty: For special warranty. D. Other Informational Submittals: 1. ASME Stamp Certification and Report: Submit "A," "S," or "PP" stamp certificate of authorization, as required by authorities having jurisdiction, and document hydrostatic testing of piping external to boiler. 2. CSA B51 pressure vessel Canadian Registration Number (CRN). 1.5 CLOSEOUT SUBMITTALS A. Operation and Maintenance Data: For boilers to include in emergency, operation, and maintenance manuals. 1.6 WARRANTY A. Manufacturer's Warranty: Manufacturer agrees to repair or replace components of boilers that fail in materials or workmanship within specified warranty period. 1. Warranty Period for Fire-Tube Condensing Boilers: a. Leakage and Materials: 10 years from date of Substantial Completion. b. Heat Exchanger Damaged by Thermal Stress and Corrosion: Nonprorated for five years from date of Substantial Completion. 2. Warranty Period for Water-Tube Condensing Boilers: 20 years from date of Substantial Completion. PART 2 - PRODUCTS 2.1 PERFORMANCE REQUIREMENTS A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. B. ASME Compliance: Fabricate and label boilers to comply with 2010 ASME Boiler and Pressure Vessel Code. C. ASHRAE/IES 90.1 Compliance: Boilers shall have minimum efficiency according to "Gas and Oil Fired Boilers - Minimum Efficiency Requirements." D. DOE Compliance: Minimum efficiency shall comply with 10 CFR 430, Subpart B, Appendix N. E. UL Compliance: Test boilers for compliance with UL 795. Boilers shall be listed and labeled by a testing agency acceptable to authorities having jurisdiction. F. CSA Compliance: Test boilers for compliance with CSA B51.

CONDENSING BOILERS LINCOLN HS STEAM PRE-PURCHASE 235216-1 G. Mounting Base: For securing boiler to concrete base. 1. Seismic Fabrication Requirements: Fabricate mounting base and attachment to boiler pressure vessel, accessories, and components with reinforcement strong enough to withstand seismic forces defined in Section 230548 "Vibration and Seismic Controls for HVAC" when mounting base is anchored to building structure. H. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Fulton 2. RBI 3. Lochinvar 4. Laars 5. Thermal Solutions 6. AWP - Mestek 2.2 FORCED-DRAFT, FIRE-TUBE CONDENSING BOILERS A. Description: Factory-fabricated, -assembled, and -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. Water-heating service only. B. Heat Exchanger: Nonferrous, corrosion-resistant combustion chamber. C. Pressure Vessel: Carbon steel with welded heads and tube connections. D. Burner: Natural gas, forced draft. E. Blower: Centrifugal fan to operate during each burner firing sequence and to prepurge and postpurge the combustion chamber. 1. Motors: Comply with NEMA designation, temperature rating, service factor, and efficiency requirements for motors specified in Section 230513 "Common Motor Requirements for HVAC Equipment." a. Motor Sizes: Minimum size as indicated; if not indicated, large enough so driven load will not require motor to operate in service factor range above 1.0. F. Gas Train: Combination gas valve with manual shutoff and pressure regulator. G. Ignition: Spark ignition with 100 percent main-valve shutoff with electronic flame supervision. H. Casing: 1. Jacket: Sheet metal, with snap-in or interlocking closures. 2. Control Compartment Enclosures: NEMA 250, Type 1A. 3. Finish: Baked-enamel or Powder-coated protective finish. 4. Insulation: Minimum 2-inch-thick, mineral-fiber or polyurethane-foam insulation surrounding the heat exchanger. 5. Combustion-Air Connections: Inlet and vent duct collars.

CONDENSING BOILERS LINCOLN HS STEAM PRE-PURCHASE 235216-1 2.3 WATER-TUBE CONDENSING BOILERS A. Description: Factory-fabricated, -assembled, and -tested, copper-finned, water-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. Water-heating service only. B. Heat Exchanger: Finned-copper primary and stainless-steel secondary heat exchangers. C. Combustion Chamber: Stainless steel, sealed. D. Burner: Natural gas, forced draft drawing from gas premixing valve. E. Blower: Centrifugal fan to operate during each burner firing sequence and to prepurge and postpurge the combustion chamber. 1. Motors: Comply with NEMA designation, temperature rating, service factor, and efficiency requirements for motors specified in Section 230513 "Common Motor Requirements for HVAC Equipment." a. Motor Sizes: Minimum size as indicated; if not indicated, large enough so driven load will not require motor to operate in service factor range above 1.0. F. Gas Train: Combination gas valve with manual shutoff and pressure regulator. G. Ignition: Silicone carbide hot-surface ignition that includes flame safety supervision and 100 percent mainvalve shutoff. H. Integral Circulator: Cast-iron body and stainless-steel impeller sized for minimum flow required in heat exchanger. I. Casing: 1. Jacket: Sheet metal, with snap-in or interlocking closures. 2. Control Compartment Enclosures: NEMA 250, Type 1A. 3. Finish: Textured epoxy. 4. Insulation: Minimum 2-inch- thick, mineral-fiber insulation surrounding the heat exchanger. 5. Combustion-Air Connections: Inlet and vent duct collars. 2.4 TRIM A. Include devices sized to comply with ASME B31.1. B. Aquastat Controllers: Operating, firing rate, and high limit. C. Safety Relief Valve: ASME rated. D. Pressure and Temperature Gage: Minimum 3-1/2-inch-diameter, combination water-pressure and - temperature gage. Gages shall have operating-pressure and -temperature ranges, so normal operating range is about 50 percent of full range.

CONDENSING BOILERS LINCOLN HS STEAM PRE-PURCHASE 235216-1 E. Boiler Air Vent: Automatic. F. Drain Valve: Minimum NPS 3/4 hose-end gate valve. G. Circulation Pump: Nonoverloading, in-line pump with split-capacitor motor having thermal-overload protection and lubricated bearings; designed to operate at specified boiler pressures and temperatures. 2.5 CONTROLS A. Refer to Section 230923 "Direct Digital Control (DDC) System for HVAC". B. Boiler operating controls shall include the following devices and features: 1. Control transformer. 2. Set-Point Adjust: Set points shall be adjustable. 3. Operating Pressure Control: Factory wired and mounted to cycle burner. 4. Low-Water Cutoff and Pump Control: Cycle feedwater pump(s) for makeup water control. 5. Sequence of Operation: Electric, factory-fabricated and field-installed panel to control burner firing rate to maintain space temperature in response to thermostat with heat anticipator located in heated space. a. Include automatic, alternating-firing sequence for multiple boilers to ensure maximum system efficiency throughout the load range and to provide equal runtime for boilers. 6. Sequence of Operation: Electric, factory-fabricated and field-installed panel to control burner firing rate to reset supply-water temperature inversely with outside-air temperature. At 0 deg F outsideair temperature, set supply-water temperature at 200 deg F; at 60 deg F outside-air temperature, set supply-water temperature at 140 deg F. a. Include automatic, alternating-firing sequence for multiple boilers to ensure maximum system efficiency throughout the load range and to provide equal runtime for boilers. C. Burner Operating Controls: To maintain safe operating conditions, burner safety controls limit burner operation. 1. High Cutoff: Automatic reset stops burner if operating conditions rise above maximum boiler design temperature. 2. Low-Water Cutoff Switch: Electronic probe shall prevent burner operation on low water. Cutoff switch shall be manual-reset type. 3. Blocked Inlet Safety Switch: Manual-reset pressure switch field mounted on boiler combustion-air inlet. 4. Audible Alarm: Factory mounted on control panel with silence switch; shall sound alarm for above conditions. D. Building Automation System Interface: Factory install hardware and software to enable building automation system to monitor, control, and display boiler status and alarms. 1. Hardwired Points: a. Monitoring: On/off status, common trouble alarm low-water-level alarm. b. Control: On/off operation, hot-water-supply temperature set-point adjustment.

CONDENSING BOILERS LINCOLN HS STEAM PRE-PURCHASE 235216-1 2. A communication interface with building automation system shall enable building automation system operator to remotely control and monitor the boiler from an operator workstation. Control features available, and monitoring points displayed, locally at boiler control panel shall be available through building automation system. 2.6 ELECTRICAL POWER A. Controllers, Electrical Devices, and Wiring: Electrical devices and connections are specified in electrical Sections. B. Single-Point Field Power Connection: Factory-installed and -wired switches, motor controllers, transformers, and other electrical devices necessary shall provide a single-point field power connection to boiler. 1. House in NEMA 250, Type 1 enclosure. 2. Wiring shall be numbered and color coded to match wiring diagram. 3. Install factory wiring outside of an enclosure in a metal raceway. 4. Provide branch power circuit to each motor and to controls with a disconnect switch or circuit breaker. 5. Provide each motor with overcurrent protection. 2.7 VENTING KITS A. Kit: Complete system, per manufacturer s recommendations. 2.8 SOURCE QUALITY CONTROL A. 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 test. B. Test and inspect factory-assembled boilers, before shipping, according to 2010 ASME Boiler and Pressure Vessel Code. C. Allow Owner access to source quality-control testing of boilers. Notify Architect 14 days in advance of testing. PART 3 - EXECUTION 3.1 EXAMINATION A. 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 performance of the Work. 1. Final boiler locations indicated on Drawings are approximate. Determine exact locations before roughing-in for piping and electrical connections.

CONDENSING BOILERS LINCOLN HS STEAM PRE-PURCHASE 235216-1 B. Examine mechanical spaces for suitable conditions where boilers will be installed. C. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 BOILER INSTALLATION A. Equipment Mounting: 1. Install boilers on cast-in-place concrete equipment base(s). Comply with requirements for equipment bases. B. Install gas-fired boilers according to NFPA 54. C. Assemble and install boiler trim. D. Install electrical devices furnished with boiler but not specified to be factory mounted. E. Install control wiring to field-mounted electrical devices. 3.3 CONNECTIONS A. Piping installation requirements are specified in other Sections. Drawings indicate general arrangement of piping, fittings, and specialties. B. Install piping adjacent to boiler to allow service and maintenance. C. 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. D. Connect piping to boilers, except safety relief valve connections, with flexible connectors of materials suitable for service. Flexible connectors and their installation are specified in Section 232116 "Hydronic Piping Specialties." E. Connect gas piping to boiler gas-train inlet with union. Piping shall be at least full size of gas-train connection. Provide a reducer if required. F. Connect hot-water piping to supply- and return-boiler tappings with shutoff valve and union or flange at each connection. G. Install piping from safety relief valves to nearest floor drain. H. Boiler Venting: 1. Install flue venting kit and combustion-air intake. 2. Connect full size to boiler connections. I. Ground equipment according to Section 260526 "Grounding and Bonding for Electrical Systems." J. Connect wiring according to Section 260519 "Low-Voltage Electrical Power Conductors and Cables."