SECTION DOMESTIC WATER PUMPS

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1 SECTION DOMESTIC WATER PUMPS PART 1 - GENERAL 1.1 SUMMARY A. Section includes the following all-bronze and bronze-fitted centrifugal pumps for domestic cold- and hot-water circulation: 1. Close-coupled, in-line, sealless centrifugal pumps. 1.2 SUBMITTALS A. Product Data: For each type and size of domestic water pump specified. Include certified performance curves with operating points plotted on curves; and rated capacities of selected models, furnished specialties, and accessories. B. Shop Drawings: Diagram power, signal, and control wiring. C. Operation and Maintenance Data: For domestic water pumps to include in emergency, operation, and maintenance manuals. D. Startup Reports: Submit reports documenting the activities required to be performed in PART 3. These reports are to be submitted two weeks after the startup is completed. E. Training Reports: Submit reports on training documenting dates and attendance. 1.3 QUALITY ASSURANCE A. Product Options: Drawings indicate size, profiles, and dimensional requirements of domestic water pumps and are based on the specific system indicated. Refer to Division 01 Section "Product Requirements." B. Electrical Components, Devices, and Accessories: 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. UL Compliance: Comply with UL 778 for motor-operated water pumps. 1.4 DELIVERY, STORAGE, AND HANDLING A. Retain shipping flange protective covers and protective coatings during storage. B. Protect bearings and couplings against damage. C. Comply with pump manufacturer's written rigging instructions for handling. WHITE CAREER ACADEMY DOMESTIC WATER PUMPS

2 1.5 COORDINATION A. Coordinate size and location of concrete bases. Concrete, reinforcement, and formwork requirements are specified in Division 3. PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Manufacturers: Subject to compliance with requirements, provide products by one of the manufacturers specified. 1. Close coupled, in-line, sealless centrifugal pumps: a. Armstrong Pumps Inc. b. Bell & Gossett Domestic Pump; ITT Industries. c. Taco, Inc. 2.2 CLOSE COUPLED, IN-LINE, SEALLESS CENTRIFUGAL PUMPS A. Description: Factory-assembled and -tested, single-stage, close-coupled, in-line, sealless centrifugal pumps as defined in HI Pump and Motor Assembly: Hermetically sealed, replaceable-cartridge-type unit with motor and impeller on common shaft and designed for installation with pump and motor shaft mounted horizontally. 2. Casing: Bronze, with threaded companion-flange connections. 3. Impeller: Corrosion-resistant material. 4. Motor: Single speed, unless otherwise indicated. Comply with requirements in Division 23 Section "Common Motor Requirements for HVAC Equipment." 2.3 CONTROLS A. Aquastat: Electric; adjustable for control of hot-water circulation pump. 1. Type: strap on sensor, for installation in hot-water circulation piping. 2. Range: 65 to 200 deg F (18 to 93 deg C). 3. Operation of Pump: On or off. 4. Transformer: Provide if required. 5. Power Requirement: 120 V, ac. 6. Settings: Start pump at 105 deg F (41 deg C) and stop pump at 125 deg F (52 deg C). 2.4 BUILDING-AUTOMATION-SYSTEM INTERFACE A. Provide auxiliary contacts in pump controllers for interface to building automation system. Include the following: 1. On-off status of each pump. 2. Alarm status. WHITE CAREER ACADEMY DOMESTIC WATER PUMPS

3 PART 3 - EXECUTION 3.1 EXAMINATION A. Examine roughing-in of domestic-water-piping system to verify actual locations of connections before pump installation. 3.2 PUMP INSTALLATION A. Install pumps with access for periodic maintenance including removal of motors, impellers, couplings, and accessories. B. Independently support pumps and piping so weight of piping is not supported by pumps and weight of pumps is not supported by piping. C. Install centrifugal pumps with motor and pump shafts horizontal. D. Install continuous-thread hanger rods and spring hangers of sufficient size to support pump weight. Vibration isolation devices are specified in Division 23 Section "Vibration Controls for HVAC." Fabricate brackets or supports as required. Hanger and support materials are specified in Division 23 Section "Hangers and Supports for Piping and Equipment." E. Suspend vertically mounted, in-line centrifugal pumps independent of piping. Install pumps with motor and pump shafts vertical. Use continuous-thread hanger rods spring hangers of sufficient size to support pump weight. Vibration isolation devices are specified in Division 23 Section "Mechanical Vibration and Seismic Controls." Hanger and support materials are specified in Division 23 Section "Hangers and Supports for Piping and Equipment." 3.3 CONTROL INSTALLATION A. Install strap on-type thermostats in hot-water return piping. 3.4 CONNECTIONS A. Piping installation requirements are specified in other Division 23 Sections. Drawings indicate general arrangement of piping, fittings, and specialties. B. Install piping adjacent to pumps to allow service and maintenance. C. Connect domestic water piping to pumps. Install suction and discharge piping equal to or greater than size of pump nozzles. Refer to Division 22 Section "Domestic Water Piping." 1. Install flexible connectors adjacent to pumps in suction and discharge piping of the following pumps: a. Separately coupled, in-line centrifugal pumps. b. Close-coupled, horizontally mounted, in-line centrifugal pumps. c. Close-coupled, vertically mounted, in-line centrifugal pumps. 2. Install shutoff valve and strainer on suction side of pumps, and check valve and throttling valve on discharge side of pumps. Install valves same size as connected piping. Refer to WHITE CAREER ACADEMY DOMESTIC WATER PUMPS

4 Division 23 Section "Valves" for general-duty valves for domestic water piping and Division 22 Section "Domestic Water Piping Specialties" for strainers. 3. Install pressure gages at suction and discharge of pumps. Install at integral pressure-gage tappings where provided or install pressure-gage connectors in suction and discharge piping around pumps. Refer to Division 23 Section "Meters and Gages for HVAC Piping" for pressure gages and gage connectors. D. Ground equipment according to Division 26 Section "Grounding and Bonding." E. Connect wiring according to Division 26 Section "Conductors and Cables." F. Connect Aquastats to pumps that they control. G. Interlock pump with water heater burner and time delay relay. 3.5 CONTRACTOR STARTUP AND REPORTING A. Engage a factory-authorized service representative to perform startup service. Startup service includes the testing, inspections and startup test reports. 1. Complete installation and startup checks according to manufacturer's written instructions. 2. Check piping connections for tightness. 3. Clean strainers on suction piping. 4. Set Aquastats for automatic starting and stopping operation of pumps. 5. Perform the following startup checks for each pump before starting: a. Verify bearing lubrication. b. Verify that pump is free to rotate by hand and that pump for handling hot liquid is free to rotate with pump hot and cold. If pump is bound or drags, do not operate until cause of trouble is determined and corrected. c. Verify that pump is rotating in the correct direction. 6. Prime pump by opening suction valves and closing drains, and prepare pump for operation. 7. Start motor. 8. Open discharge valve slowly. 9. Adjust temperature settings on aquastats. 10. Adjust timer settings. B. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain controls and pumps. Refer to Division 01 Section "Demonstration and Training." C. Final Checks Before Startup: Perform the following preventive maintenance operations and checks before startup: 1. Lubricate oil-lubricated-type bearings. 2. Remove grease-lubricated bearing covers and flush bearings with kerosene and thoroughly clean. Fill with new lubricant according to manufacturer's recommendations. 3. Disconnect couplings and check motors for proper rotation. Rotation shall match direction of rotation marked on pump casing. WHITE CAREER ACADEMY DOMESTIC WATER PUMPS

5 4. Check that pumps are free to rotate by hand. Pumps for handling hot liquids shall be free to rotate with pump hot and cold. Do not operate pump if bound or if it drags even slightly until cause of trouble is determined and corrected. 5. Check that pump controls are correct for required application. D. Starting procedure for pumps with shutoff power not exceeding safe motor power: 1. Prime pumps by opening suction valves and closing drains, and prepare pumps for operation. 2. Open cooling water supply valves if stuffing boxes are water cooled. 3. Open the liquid supply valves if pumps are so fitted. 4. Open circulating line valves if pumps should not be operated against dead shutoff. 5. Start motors. 6. Open discharge valves slowly. 7. Observe leakage from stuffing boxes and adjust sealing liquid valves for proper flow to ensure lubrication of packing. Let packing "run in" before reducing leakage through stuffing boxes, then tighten glands. 8. Check general mechanical operation of pumps and motors. 9. Close circulating piping valves once there is sufficient flow through pumps to prevent overheating. 10. Remove startup strainers from suction diffusers and install permanent strainers after system has been in operation. E. When pumps are to be started against closed check valves with discharge gate valves open, steps are same except open discharge gate valves some time before motors are started. 3.6 DEMONSTRATION AND COMMISSIONING A. Train Owner s maintenance personnel on procedures and schedules for starting up and shutting down, troubleshooting, servicing, and maintaining chillers. The training will occur after the startup report has been provided to the owner and the trainer will provide tow (20 Installation an Operations manuals for the use of the owners personnel during training. B. Review data in maintenance manuals. Refer to Division 01 Section Operation and Maintenance Data. All required and recommended maintenance will be reviewed as well as operational troubleshooting. If the IOM does not include a written troubleshooting guide one will be provided. C. Schedule training with Owner, through Architect, with at least seven days advance notice. D. Demonstrate proper operation of equipment to commissioning agent or designated owners personnel. The scope of the demonstration will include functional performance requirements under both local and building automation control as well as any commissioning requirements in Division 01 or 23. END OF SECTION WHITE CAREER ACADEMY DOMESTIC WATER PUMPS

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