remote wastewater facilities improvements enclosed

Remote Wastewater Facilities Improvements Enclosed Controllers & Miscellaneous Equipment Lowell, Massachusetts Engineer: Stantec Section 16444 of 11 ------------------------------------------------------------------------------------------------------------------------------------------

195150058 CWSRF 4108 ADDENDUM 6, ATTACHMENT A

July 2017

SECTION 16444

ENCLOSED CONTROLLERS & MISCELLANEOUS EQUIPMENT

PART 1 - GENERAL

1.1 FILED SUB-BID REQUIREMENTS

A. This section is a part of the filed sub-bid for Division 16 – Electrical. See Section 16050 – Basic Electrical Materials and Methods.

1.2 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.3 SUMMARY

A. Section includes the SCADA and pump control panel enclosures located at the Rosemont Pumping Station and field mounted disconnects.

B. Related Section:

1. Section 16443 "Variable-Frequency Motor Controllers" for general-purpose, ac, adjustable-frequency, pulse-width-modulated controllers.

2. Section 16140 “Wiring Devices”.

3. Section 16075 "Electrical Identification."

4. Section 16123 "Control-Voltage Electrical Cables."

1.4 DEFINITIONS

A. MCCB: Molded-case circuit breaker.

B. MCP: Motor circuit protector.

C. N.C.: Normally closed.

D. N.O.: Normally open.

E. OCPD: Overcurrent protective device.

F. SCR: Silicon-controlled rectifier.

G. VFD: Variable Frequency Drive



July 2017

1.5 PERFORMANCE REQUIREMENTS

A. Seismic Performance: Enclosed controllers shall withstand the effects of earthquake motions determined according to ASCE/SEI 7.

1. The term "withstand" means "the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified and the unit will be fully operational after the seismic event."

1.6 ACTION SUBMITTALS

A. Product Data: For the SCADA and pump control panel enclosures. Include manufacturer's technical data on features, performance, electrical characteristics, ratings, and enclosure types and finishes.

B. Shop Drawings: For SCADA and pump control panel enclosures. Include dimensioned plans, elevations, sections, details, and required clearances and service spaces around controller enclosures.

1. Show tabulations of the following:

a. Each installed unit's type and details. b. Factory-installed devices. c. Nameplate legends. d. Short-circuit current rating of integrated unit. e. Listed and labeled for integrated short-circuit current (withstand) rating of OCPDs

in combination controllers by an NRTL acceptable to authorities having jurisdiction. f. Features, characteristics, ratings, and factory settings of individual OCPDs in

combination controllers.

2. Wiring Diagrams: For power, signal, and control wiring.

1.7 INFORMATIONAL SUBMITTALS

1.8 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. Comply with NFPA 70.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Store the SCADA and pump control panel enclosures indoors in clean, dry space with uniform temperature to prevent condensation. Protect the SCADA and pump control panel enclosures from exposure to dirt, fumes, water, corrosive substances, and physical damage.



July 2017

B. If stored in areas subject to weather, cover the SCADA and pump control panel enclosures to protect them from weather, dirt, dust, corrosive substances, and physical damage. Remove loose packing and flammable materials from inside controllers.

1.10 PROJECT CONDITIONS

A. Environmental Limitations: Rate equipment for continuous operation under the following conditions unless otherwise indicated:

1. Ambient Temperature: Not less than minus 22 deg F (minus 30 deg C) and not exceeding 104 deg F (40 deg C).

2. Altitude: Not exceeding 6600 feet (2010 m).

B. Interruption of Existing Electrical Systems: Do not interrupt electrical systems in facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary electrical service according to requirements indicated:

1. Notify Construction Manager no fewer than two days in advance of proposed interruption of electrical systems.

2. Indicate method of providing temporary utilities. 3. Do not proceed with interruption of electrical systems without Construction Manager's

written permission. 4. Comply with NFPA 70E.

1.11 COORDINATION

A. Coordinate layout and installation of the SCADA and pump control panel enclosures with other construction including conduit, piping, equipment, and adjacent surfaces. Maintain required workspace clearances and required clearances for equipment access doors and panels.

B. Coordinate sizes and locations of concrete bases with actual equipment provided. Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork requirements are specified with concrete.

PART 2 - PRODUCTS

2.1 SCADA / PUMP CONTROL PANEL ENCLOSURES 1. Panel Enclosure: Enclosure shall be constructed in conformance with applicable sections

of National Electrical Manufacturers' Association (NEMA) standards for enclosures. The electrical control equipment shall be mounted within a freestanding NEMA 4X stainless steel enclosure with back panel and double doors as defined on the electrical drawings.

2.2 MOTOR BRANCH COMPONENTS

A. Component Mounting.



July 2017

1. All motor branch circuits shall be of the highest industrial quality, securely fastened to a removable sub-plate with screws and lock washers. The sub-plate shall be tapped to accept all mounting screws. Self-tapping screws shall not be used to mount any component. All operating controls and instruments shall be securely mounted and shall be clearly labeled to indicate function.

B. Motor Branch Circuit Components. 1. All motor branch circuits shall be of the highest industrial quality, securely fastened to a

removable sub-plate with screws and lock washers. The sub-plate shall be tapped to accept all mounting screws. Self-tapping screws shall not be used to mount any component. All operating controls and instruments shall be securely mounted and shall be clearly labeled to indicate function.

C. Circuit Breakers and Operating Mechanisms. 1. A properly sized molded case circuit breaker shall be furnished for each pump motor. All

circuit breakers or MCPs shall be sealed by the manufacturer after calibration to prevent tampering.

D. VFD’s. 1. Reference Section 16443 "Variable-Frequency Motor Controllers" for general-purpose,

ac, adjustable-frequency, pulse-width-modulated controllers. VFD size shall be as indicated on the electrical drawings. The VFD type should be the same as specified for pump stations Chelmsford, Pawtucket, and Princeton.

E. Wiring.

1. The control panel, as furnished by the manufacturer, shall be completely wired. The Contractor shall field connect the power feeder lines to the main terminal block, final con-nections to the remote alarm devices, and the connections between the pump and the pump motor control. All wiring, workmanship, and schematic wiring diagrams shall be in compliance with applicable standards and specifications set forth by the National Electri-cal Code (NEC).

2. All user serviceable panel wiring shall be type MTW or THW, 600 volts, and shall be color

coded as follows:

a. Line and Load Circuits, AC or DC power Black

b. AC Control Circuit Less Than Line Voltage Red

c. Equipment Grounding Conductor Green

d. Current Carrying Neutral White

e. Hot with Circuit Breaker Open Orange

f. Interlock Control Circuit from External Source Yellow

3. Wire Identification and Sizing.



July 2017

a. Control circuit wiring inside the panel, with the exception of internal wiring of individual components, shall be of 16 gauge minimum, type MTW or THW, 600 volts. Power wiring shall be as defined in the electrical draw-ings.

b. The amp capacity of motor branch conductors and other power conduc-

tors shall not exceed the temperature rating of the connecting terminals. Wires shall be clearly numbered at each end in accordance with the electrical diagrams. All wires on the sub-plate shall be bundled and tied.

4. Wire Bundles.

a. Wires connected to components mounted on the enclosure door shall be

bundled and tied in accordance with good commercial practice. Bundles shall be made flexible at the hinged side of the enclosure. Adequate length and flex shall be provided to allow the door to swing to its full open position without undue stress or abrasion on the wire or insulation. Bun-dles shall be held in place on each side of the hinge by mechanical fas-tening devices.

2.3 ELECTRICAL CABINET ENCLOSURE

A. Enclosure shall be UL listed and meet or exceed NEMA 3RX requirements.

B. Cabinet Construction

1. The cabinet and door shall be constructed from type 316L stainless steel, minimum thickness 14 gauge. External welds shall be made by using the Heliarc welding method; whereas, internal welds will be made by the wire welding method. All welds shall be neatly formed and free of cracks, blow holes and other irregularities.

2. The cabinet shall be designed with a sloped top to prevent the accumulation of water on its top surface.

3. The door opening shall be double flanged on all (4) sides which increases strength around openings and keeps dirt and liquids from entering the enclosure when door is opened.

4. A door restraint shall be provided to prevent door movement in windy conditions.

5. The door opening will be a minimum of 80% of the front surface area. Double doors will overlap and utilize a removable center post.

6. The doors shall be furnished with a gasket that satisfies the physical properties as found in UL508 table 21.1 and shall form a weathertight seal between the cabinet and door.

7. The hinges shall be continuous and bolted to the cabinet and door utilizing 1/4-20 stainless steel carriage bolts and nylock nuts.

8. The latching mechanism shall be a 3- point draw roller type.



July 2017

9. An operating handle shall be furnished. The handle shall be stainless steel with a ¾ inch diameter shank. The latching handle shall have a provision for padlocking in the closed position.

10. A light/alarm switch bracket shall be provided.

C. Cabinet Ventilation

1. Cabinet requiring ventilation shall be provided with louvered vents in the front door with a removable air filter.

2. Louvers shall satisfy the NEMA rod entry test for 3R ventilated enclosures.

3. The filter will cover the vents and shall be held firmly in place with bottom and side brackets and springloaded clamps.

4. Exhaust air will be vented out between the top of the cabinet and door.

5. The ventilation plenum area shall have a removable plate with provisions for mounting an optional fan assembly.

6. The ventilation system will be designed to handle a minimum of 100 cubic feet of air per minute.

D. Equipment Mounting

1. Adjustable Channels

a. The enclosure shall be equipped with two adjustable "C" mounting channels on both side walls and back wall of the enclosure, allowing versatile positioning of shelves or panels.

b. The channel assembly shall provide infinite vertical and horizontal adjustment and not limit the positioning of shelves or panels. All mounting hardware will be furnished.

2. Aluminum Back Panel

a. If equipment is to be panel mounted, the enclosure shall be provided with a 5052-H32 aluminum back panel having a thickness of 0.125 inch. Note: Cabinets wider than 48 inches will utilize two (2) panels side by side vertically.

b. The panel shall be natural finish. All mounting hardware will be furnished.

E. Options

1. Thermostat Controlled Fan

a. Fan kit shall consist of fan, thermostat, guard, lead assembly and mounting screws. The standard fan kit is 110VAC and shall be factory installed or shipped separately.

2. Thermostat Controlled Heater



July 2017

a. Heater kit shall consist of strip heater, thermostat and guard. The standard heater kit is 110VAC and shall be factory installed or shipped separately.

3. Electrical Convenience Receptacle

a. Provide 120V duplex receptacle for each cabinet.

4. Light with Switch

a. Provide 15W LED luminaire in vaportight fixture and single pole toggle switch.

5. Horn/Strobe

a. Provide Federal Signal SLM600 Streamline horn/strobe or equivalent.

2.4 TERMINAL BLOCKS

A. Provide terminal blocks in all terminal boxes panels, control and instrumentation cabi-

nets/panels requiring terminations as indicated or by wiring diagrams for equipment actu-ally purchased. All terminals shall be rated 600 V, 20 amp, minimum. All terminals shall be screw type with provisions for white wire markers.

2.5 WIRING

A. Grounding.

1. The SCADA and pump control panel manufacturer shall provide a common ground bar mounted on the enclosure back plate. The mounting surface of the ground bar shall have any paint removed before making final connections.

2. The Contractor shall make the field connections to the main ground lug and each pump motor in accordance with the National Electric Code.

B. Equipment Marking.

1. A permanent, corrosion-resistant name plate(s) shall be attached to the control and include the following information:

a. Equipment serial number

b. Supply voltage, phase and frequency

c. Current rating of the minimum main conductor

d. Electrical wiring diagram number

e. Motor horsepower and full load current

f. Motor overload heater element

g. Motor circuit breaker trip current rating



July 2017

h. Name and location of equipment manufacturer

2. Control components shall be permanently marked using the same identification shown on the electrical diagram. Identification label shall be mounted adjacent to the device.

3. Switches, indicators, and instruments shall be plainly marked to indicate function,

position, etc. Marking shall be mounted adjacent to the above the device.

2.6 ACCESSORIES

A. Wiring devices, refer to section 16140 “Wiring Devices”.

B. SAFETY SWITCHES

1. Provide heavy duty type, safety switches, with external operating handles, 3 pole, single throw, rated 600 volt, 60 Hertz with ampere rating as indicated and NEMA rating as indicated on the drawings with means to padlock off.

2. Heavy duty safety switches to be UL listed, File E 2875 and 154828, and meet or exceed NEMA Standard KS1.

3. Provide H.D. safety switches at 600 volt for motors and package equipment, as

indicated.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine areas and surfaces to receive the SCADA and pump control panel enclosures, with Installer present, for compliance with requirements and other conditions affecting performance of the Work.

B. Examine the SCADA and pump control panel enclosures before installation. Reject enclosed controllers that are wet, moisture damaged, or mold damaged.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION

A. Comply with NECA 1.

3.3 IDENTIFICATION

A. Identify the SCADA and pump control panel enclosures, components, and control wiring. Comply with requirements for identification specified in Section 16075 "Electrical Identification."



July 2017

1. Identify field-installed conductors, interconnecting wiring, and components; provide warning signs.

2. Label each enclosure with engraved nameplate. 3. Label each enclosure-mounted control and pilot device.

3.4 CONTROL WIRING INSTALLATION

A. Install wiring between enclosed controllers and remote devices and plants SCADA control system as indicated. Comply with requirements in Section 16123 "Control-Voltage Electrical Cables."

B. Bundle, train, and support wiring in enclosures.

C. Connect selector switches and other automatic-control selection devices where applicable.

1. Connect selector switches to bypass only those manual- and automatic-control devices that have no safety functions when switch is in manual-control position.

2. Connect selector switches with enclosed-controller circuit in both manual and automatic positions for safety-type control devices such as low- and high-pressure cutouts, high-temperature cutouts, and motor overload protectors.

3.5 START-UP SERVICE

A. The equipment manufacturer shall furnish the services of a qualified factory trained Field Service Engineer for one 8-hour working day(s) at the site to inspect the installation and instruct the Owner's personnel on the operation and maintenance of the pumping units. After the pumps have been completely installed and wired, the Contractor shall have the manufacturer do the following:

1. Megger stator and power cables.

2. Check for proper rotation.

4. Check power supply voltage.

5. Measure motor operating load and no load current.

A. During the initial inspection, the manufacturer's service representative shall review

recommended operation and maintenance procedures with the Owner's personnel.

3.5 FIELD QUALITY CONTROL

A. Testing Agency: Engage a qualified testing agency to perform tests and inspections.

B. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections.

C. Perform tests and inspections. 1. Manufacturer's Field Service: Engage a factory-authorized service representative

to inspect components, assemblies, and equipment installations, including



July 2017

connections, and to assist in testing.

D. Tests and Inspections:

1. Inspect the SCADA and pump control panel enclosures, wiring, components, connections, and equipment installation. Test and adjust controllers, components, and equipment.

2. Test insulation resistance for each enclosed-controller element, component, connecting motor supply, feeder, and control circuits.

3. Test continuity of each circuit.

4. Verify that voltages at controller locations are within plus or minus 10 percent of motor nameplate rated voltages. If outside this range for any motor, notify Engineer before starting the motor(s).

5. Test each motor for proper phase rotation.

6. Perform each electrical test and visual and mechanical inspection stated in NETA Acceptance Testing Specification. Certify compliance with test parameters.

7. Correct malfunctioning units on-site, where possible, and retest to demonstrate compliance; otherwise, replace with new units and retest at no cost to the customer.

8. Test and adjust controls, remote monitoring, and safeties. Replace damaged and malfunctioning controls and equipment.

E. The SCADA and pump control panel enclosures will be considered defective if they do not pass tests and inspections.

F. Prepare test and inspection reports including a certified report that identifies enclosed controllers and that describes scanning results. Include notation of deficiencies detected, remedial action taken, and observations after remedial action.

3.6 ADJUSTING

A. Set field-adjustable switches and program microprocessors for required start and stop sequences in VFD’s.

3.7 PROTECTION

A. Temporary Heating: Apply temporary heat to maintain temperature according to manufacturer's written instructions until enclosed controllers are ready to be energized and placed into service.

B. Replace controllers whose interiors have been exposed to water or other liquids prior to Substantial Completion.

3.8 DEMONSTRATION



July 2017

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain the SCADA and pump control panel enclosures, and to use and program VFD’s.

END OF SECTION

tjcallo

Typewritten Text

Addendum No. 6 Attachment B

tjcallo

Typewritten Text

Addendum No. 6 Attachment C

tjcallo

Typewritten Text

Addendum No. 6 Attachment D

tjcallo

Typewritten Text

Addendum No. 6 Attachment E

tjcallo

Typewritten Text

Addendum No. 6 Attachment F

Addendum No. 6

Attachment G

Sketch SK-1

Remote Wastewater Facilities Improvements Common Motor Requirements for HVAC Equipment Lowell, Massachusetts Engineer: Stantec Section 15513 Page 1 of 3

195150058 CWSRF 4108 July 2017 ADDENDUM No. 6, ATTACHMENT H

DIVISION 15 - MECHANICAL – HVAC

(Filed Sub-Bid Required) SECTION 15513

COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT

PART 1 - GENERAL

1.0 FILED SUB-BID REQUIREMENTS

A. This section is a part of the filed sub-bid for Division 15 – Mechanical - HVAC. See Section 15049 – Heating, Ventilating and Air Conditioning.

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 general requirements for single-phase and polyphase, general-purpose, horizontal, small and medium, squirrel-cage induction motors for use on alternating-current power systems up to 600 V and installed at equipment manufacturer's factory or shipped separately by equipment manufacturer for field installation.

1.3 COORDINATION

A. Coordinate features of motors, installed units, and accessory devices to be compatible with the following:

1. Motor controllers. 2. Torque, speed, and horsepower requirements of the load. 3. Ratings and characteristics of supply circuit and required control sequence. 4. Ambient and environmental conditions of installation location.

PART 2 - PRODUCTS

2.1 GENERAL MOTOR REQUIREMENTS

A. Comply with NEMA MG 1 unless otherwise indicated.

B. Comply with IEEE 841 for severe-duty motors.



2.2 MOTOR CHARACTERISTICS

A. Duty: Continuous duty at ambient temperature of 40 deg C and at altitude of 3300 feet above sea level.

B. Capacity and Torque Characteristics: Sufficient to start, accelerate, and operate connected loads at designated speeds, at installed altitude and environment, with indicated operating sequence, and without exceeding nameplate ratings or considering service factor.

2.3 POLYPHASE MOTORS

A. Description: NEMA MG 1, Design B, medium induction motor.

B. Efficiency: Premium efficient, as defined in NEMA MG 1.

C. Service Factor: 1.15.

D. Multispeed Motors: Variable torque.

1. For motors with 2:1 speed ratio, consequent pole, single winding. 2. For motors with other than 2:1 speed ratio, separate winding for each speed.

E. Multispeed Motors: Separate winding for each speed.

F. Rotor: Random-wound, squirrel cage.

G. Bearings: Regreasable, shielded, antifriction ball bearings suitable for radial and thrust loading.

H. Temperature Rise: Match insulation rating.

I. Insulation: Class F.

J. Code Letter Designation:

1. Motors 15 HP and Larger: NEMA starting Code F or Code G. 2. Motors Smaller Than 15 HP: Manufacturer's standard starting characteristic.

K. Enclosure Material: Cast iron for motor frame sizes 324T and larger; rolled steel for motor frame sizes smaller than 324T Insert number.

2.4 ADDITIONAL REQUIREMENTS FOR POLYPHASE MOTORS

A. Motors Used with Reduced-Voltage and Multispeed Controllers: Match wiring connection requirements for controller with required motor leads. Provide terminals in motor terminal box, suited to control method.

B. Motors Used with Variable-Frequency Controllers:

1. Windings: Copper magnet wire with moisture-resistant insulation varnish, designed and tested to resist transient spikes, high frequencies, and short time rise pulses produced by pulse-width-modulated inverters.

2. Premium-Efficient Motors: Class B temperature rise; Class F insulation.



3. Inverter-Duty Motors: Class F temperature rise; Class H insulation. 4. Thermal Protection: Comply with NEMA MG 1 requirements for thermally protected

motors.

C. Severe-Duty Motors: Comply with IEEE 841, with 1.15 minimum service factor.

2.5 SINGLE-PHASE MOTORS

A. Motors larger than 1/20 hp shall be one of the following, to suit starting torque and requirements of specific motor application:

1. Permanent-split capacitor. 2. Split phase. 3. Capacitor start, inductor run. 4. Capacitor start, capacitor run.

B. Multispeed Motors: Variable-torque, permanent-split-capacitor type.

C. Bearings: Prelubricated, antifriction ball bearings or sleeve bearings suitable for radial and thrust loading.

D. Motors 1/20 HP and Smaller: Shaded-pole type.

E. Thermal Protection: Internal protection to automatically open power supply circuit to motor when winding temperature exceeds a safe value calibrated to temperature rating of motor insulation. Thermal-protection device shall automatically reset when motor temperature returns to normal range.

PART 3 - EXECUTION (Not Applicable)

END OF SECTION 15513

remote wastewater facilities improvements enclosed

Documents