OPERATION AND MAINTENANCE TRAINING

A. Provide services of manufacturer’s service representative to instruct OWNER’s personnel in operation and maintenance of equipment. Training shall include start-up and shutdown, servicing and preventative maintenance schedule and procedures, and troubleshooting procedures plus procedures for obtaining repair parts and technical assistance.

1. Manufacturer’s representative shall provide 1 day, 8 hours, on-site training.

2. Review operating and maintenance data contained in the operating and maintenance manuals.

3. Schedule training with OWNER, provide at least 7-day prior written notice to ENGINEER after approved O&M manuals have been reviewed and accepted.

END OF SECTION

City of Flint WPC

SECTION 11322 - DEGRITTING EQUIPMENT

PART 1 - GENERAL 1.01 SUMMARY

A. Section Includes: Labor, materials, and equipment necessary for fabrication, production, installation, and erection of the items specified in this Section as shown on Drawings and listed on Schedule.

1. The responsibility of furnishing a completely functioning Grit System is by the Grit System Supplier. The complete Grit System shall include grit hydraulic concentrator equipment, grit pumps, grit washer and classification unit, grit dewatering escalator, and all ancillary equipment as required and recommended by Grit System Supplier for a complete and functional system meeting the requirements of the Contract Documents.

B. Related Sections: Drawings and general provisions of the Contract, including General and Supplementary Conditions, Division 1 Specification Sections and the following sections apply to the Work of this Section.

1. Section 05500 Metal Fabrications 2. Section 05520 Handrails and Railings

3. Section 05530 Grating

C. Products Furnished But Not Installed Under This Section: Anchor bolts shall be installed under Div 3, in accordance with certified prints furnished by equipment manufacturer.

D. This is a performance specification. System conditions and locations are identified in this Specification. The manufacturer is solely responsible for the design of the system including all materials of construction, to meet the required conditions. The design parameters indicated in this section are minimum requirements and shall not be construed as the ENGINEER assuming design responsibility or liability. If any of these specified parameters are incompatible with the manufacturer’s design or specified operating conditions, it shall be the responsibility of the manufacturer to promptly inform the OWNER and ENGINEER in writing. In the event the manufacturer cannot achieve the performance requirement the OWNER will reject the equipment. The manufacturer is responsible for meeting or exceeding the design parameters indicated within this Contract.

1.02 REFERENCE STANDARDS

City of Flint WPC

10. ASTM A 276 11. ASTM A 312 12. ASTM A 479 1.03 SYSTEM DESCRIPTION

A. System shall consist of the following components:

1. Grit concentrator mounted in a concrete tank (Eutek HeadCell): The Grit Concentrator unit uses stacked trays mounted in a concrete tank. Flow enters the distribution box and enters each tray. This flow is introduced at the tangential to the stacked trays to create a vortex flow path in the tray/tank. The Grit Concentrator shall provide sufficient surface area to remove the specified grit particles from the specified peak flow and other flows listed on the schedule. These stacked trays shall concentrate the grit in a sump at the bottom of the unit. The de-gritted effluent from the Grit Concentrator shall be weir discharged as shown on the drawings.

The Grit Concentrator shall be all-hydraulic, self-activating and shall not require internal moving parts.

The Grit Concentrator technology shall be designed utilizing Computational Fluid Dynamics (CFD) and field data to verify its flow regime, headloss and grit removal characteristics.

2. Grit Pump: The Grit Pump shall convey the concentrated grit slurry from the underflow of the Grit Concentrator to the Grit Washing / Classification unit.

3. Grit Washing and Classification Unit (Eutek Slurry Cup): The Grit Washing / Classification unit shall receive the underflow from the Grit Concentrator. The unit shall be mounted above and discharge the concentrated and washed grit slurry to the Grit Dewatering Escalator. The de-gritted overflow shall be discharged upstream of the Grit Concentrator.

4. Grit Dewatering Escalator (Eutek Snail): The Grit Dewatering Escalator shall receive the underflow from the Grit Washing / Classification unit and allow the washed grit to settle in the integral clarifier. A slow moving belt shall carry the grit to the point of discharge allowing it to dewater during transport. The de-gritted overflow shall be discharged upstream of the primary grit removal equipment.

5. Control Valves and Accessories

6. Control Panels and Controls Logic Programming

a. The manufacturer control panel shall be supplied with a Rockwell compact logix programmable logic controller and Hirshman ethernet switches for LAN and IO traffic. A panelview plus series 7 1500 touchscreen shall be supplied.

b. The programmable logic controller, panelview and switch shall be programmed by the manufacturer for control of the manufacturer supplied equipment. Any signals needed for automatic operation shall be supplied over the fiber optic plant SCADA network. Coordinate with Tetra Tech for these signals to be delivered to the manufacturer’s system for control and monitoring.

City of Flint WPC

c. Turn over to OWNER and ENGINEER an electronic program copy for the panelview and PLC. Coordinate with OWNER and ENGINEER on software versions to use for the PLC programming software and the panelview plus software.

d. Coordinate IP addresses with OWNER and ENGINEER.

e. Integration of these manufacturer programmed systems to the existing plant-wide SCADA system shall be by Tetra Tech.

f. An on-line UPS shall be provided for powering the PLC, the panelview, and ethernet switch.

g. Refer to system configuration drawing I-100 for additional information and requirements. Provide copper and fiber patch cables as shown. Provide surface mounted fiber optic patch panel with ports and bulkheads as shown.

h. Variable frequency drives shall be supplied in separate enclosures and meet the requirements of specification section 16422. Variable frequency drives provided shall be Rockwell Powerflex 753 series or Schneider Electric Altivar Process 600 series. Provide with MTE Matrix AP input filter and output DV/DT filter for each drive. Control panel to be provided with transient voltage surge protection on the 480V 3 phase input.

7. Refer to the wiring diagrams on the electrical drawings and to the instrumentation system configuration for additional requirements to be provided.