This Product MasterSpec Section modifies the original MasterSpec text, and does not include the full content of the original MasterSpec Section


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Copyright 2014 AIA MasterSpec Premium 09/14

PRODUCT MASTERSPEC LICENSED BY ARCOM TO SERVICE WIRE CO.


Copyright 2014 by The American Institute of Architects (AIA)

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA

This Product MasterSpec Section is licensed by ARCOM to Service Wire Company ("Licensee").

This Product MasterSpec Section modifies the original MasterSpec text, and does not include the full content of the original MasterSpec Section.

Revisions made to the original MasterSpec text are made solely by the Licensee and are not endorsed by, or representative of the opinions of, ARCOM or The American Institute of Architects (AIA). Neither AIA nor ARCOM are liable in any way for such revisions or for the use of this Product MasterSpec Section by any end user. A qualified design professional should review and edit the document to suit project requirements.

For more information, contact Service Wire Company, 300 Davis Road, Culloden, WV 25510; Website: www.servicewire.com; Email: lee.perry@servicewire.com.

For information about MasterSpec contact ARCOM at (800) 424-5080 or visit www.MasterSpec.com.

SECTION 262923 - VARIABLE-FREQUENCY MOTOR CONTROLLERS

TIPS:

To view non-printing Editor's Notes that provide guidance for editing, click on Masterworks/Single File Formatting/Toggle/Editor's Notes.

To read detailed research, technical information about products and materials, and coordination checklists, click on Masterworks/Supporting Information.

Revise this Section by deleting and inserting text to meet Project-specific requirements.

This Section uses the term "Architect." Change this term to match that used to identify the design professional as defined in the General and Supplementary Conditions.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

See "Sustainable Design Considerations" Article in the Evaluations for a discussion of sustainable design requirements that may impact the editing of this Section.

PART 1 - GENERAL

1.1RELATED DOCUMENTS

Retain or delete this article in all Sections of Project Manual.

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

1.2SUMMARY

This Section is limited to separately enclosed, preassembled, combination VFCs furnished by a VFC manufacturer; it does not include panel-mounted variable-frequency drives intended to be field installed in separate enclosures by contractors or incorporated into machinery or processes as part of a packaged system. The Section Text does not include VFCs for constant-horsepower loads because they are seldom used in commercial (e.g., plumbing and HVAC) applications; however, they can be added to suit Project.

A.Section includes separately enclosed, preassembled, combination VFCs, rated 600 V and less, for speed control of three-phase, squirrel-cage induction motors.

B.Related Requirements:

Retain subparagraph below to cross-reference requirements Contractor might expect to find in this Section but are specified in other Sections.

1.Section 262419 "Motor-Control Centers" for VFCs installed in motor-control centers.

1.3DEFINITIONS

Retain terms that remain after this Section has been edited for a project.

A.ASD: Adjustable speed drive.

B.CE: Conformite Europeene (European Compliance).

C.CPT: Control power transformer.

D.DDC: Direct digital control.

E.EMI: Electromagnetic interference.

F.LED: Light-emitting diode.

G.NC: Normally closed.

H.NO: Normally open.

I.OCPD: Overcurrent protective device.

J.PID: Control action, proportional plus integral plus derivative.

K.RFI: Radio-frequency interference.

L.VFC: Variable-frequency motor controller.

M.VSD: Variable speed drive.

1.4ACTION SUBMITTALS

A.Product Data: For each type and rating of VFC indicated.

1.Include dimensions and finishes for VFCs.

2.Include rated capacities, operating characteristics, electrical characteristics, and furnished specialties and accessories.

B.Shop Drawings: For each VFC indicated.

1.Include mounting and attachment 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.

1.5INFORMATIONAL SUBMITTALS

Retain "Coordination Drawings" Paragraph below for situations where limited space necessitates maximum utilization for efficient installation of different components or if coordination is required for installation of products and materials by separate installers. Coordinate paragraph with other Sections specifying products listed below. Preparation of coordination drawings requires the participation of each trade involved in installations within the limited space.

A.Coordination Drawings: Floor plans, drawn to scale, showing dimensioned layout on which the following items are shown and coordinated with each other, using input from installers of the items involved:

1.Required working clearances and required area above and around VFCs.

2.Show VFC layout and relationships between electrical components and adjacent structural and mechanical elements.

3.Show support locations, type of support, and weight on each support.

4.Indicate field measurements.

Coordinate "Qualification Data" Paragraph below with qualification requirements in Section 014000 "Quality Requirements" and as may be supplemented in "Quality Assurance" Article.

B.Qualification Data: For testing agency.

Retain "Seismic Qualification Certificates" Paragraph below if required by seismic criteria applicable to Project. Coordinate with Section 260548.16 "Seismic Controls for Electrical Systems." See ASCE/SEI 7 for certification requirements for equipment and components.

C.Seismic Qualification Certificates: For each VFC, accessories, and components, from manufacturer.

1.Certificate of compliance.

2.Dimensioned Outline Drawings of Equipment Unit: Identify center of gravity and locate and describe mounting and anchorage provisions.

3.Detailed description of equipment anchorage devices on which the certification is based, and their installation requirements.

Retain "Product Certificates" Paragraph below to require submittal of product certificates from manufacturers.

D.Product Certificates: For each VFC from manufacturer.

Retain "Harmonic Analysis Report" Paragraph below if an analysis is required from VFC manufacturer. See "Harmonic Distortion" Article in the Evaluations and the Drawing Coordination Checklist for additional information.

E.Harmonic Analysis Report: Provide Project-specific calculations and manufacturer's statement of compliance with IEEE 519.

F.Source quality-control reports.

Retain "Field quality-control reports" Paragraph below if Contractor is responsible for field quality-control testing and inspecting.

G.Field quality-control reports.

H.Sample Warranty: For special warranty.

1.6CLOSEOUT SUBMITTALS

A.Operation and Maintenance Data: For VFCs to include in emergency, operation, and maintenance manuals.

1.In addition to items specified in Section 017823 "Operation and Maintenance Data," include the following:

Retain first subparagraph below if circuit breakers are specified in VFCs; retain second if field-adjustable overload relays are specified.

a.Manufacturer's written instructions for testing and adjusting thermal-magnetic circuit breaker and motor-circuit protector trip settings.

b.Manufacturer's written instructions for setting field-adjustable overload relays.

c.Manufacturer's written instructions for testing, adjusting, and reprogramming microprocessor control modules.

d.Manufacturer's written instructions for setting field-adjustable timers, controls, and status and alarm points.

Retain one or both subparagraphs below for projects with multiple sizes and types of VFCs, and when retaining motor-running overload protection in "Bypass Systems" Article. See Evaluations for discussion.

e.Load-Current and Overload-Relay Heater List: Compile after motors have been installed, and arrange to demonstrate that selection of heaters suits actual motor nameplate, full-load currents.

f.Load-Current and List of Settings of Adjustable Overload Relays: Compile after motors have been installed, and arrange to demonstrate that switch settings for motor-running overload protection suit actual motors to be protected.

1.7MAINTENANCE MATERIAL SUBMITTALS

Revise this article to include extra materials that Owner may require and that may fail more frequently due to continual use. Coordinate extra materials with features retained in Part 2.

Coordinate quantity of fuses with Section 262813 "Fuses" for required space in spare-fuse cabinet.

A.Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1.Power Fuses: Equal to [10] <Insert number> percent of quantity installed for each size and type, but no fewer than [three] <Insert number> of each size and type.

2.Control Power Fuses: Equal to [10] <Insert number> percent of quantity installed for each size and type, but no fewer than [two] <Insert number> of each size and type.

3.Indicating Lights: [Two] <Insert number> of each type and color installed.

4.Auxiliary Contacts: Furnish [one] <Insert number> spare(s) for each size and type of magnetic controller installed.

5.Power Contacts: Furnish [three] <Insert number> spares for each size and type of magnetic contactor installed.

6.<Insert extra materials>.

1.8QUALITY ASSURANCE

Retain "Testing Agency Qualifications" Paragraph below if Contractor selects testing agency or if Contractor is required to provide services of a qualified testing agency in "Field Quality Control" Article. Qualification requirements are in addition to those specified in Section 014000 "Quality Requirements," which also defines "NRTL" (nationally recognized testing laboratory).

A.Testing Agency Qualifications: Member company of NETA or an NRTL.

1.Testing Agency's Field Supervisor: Currently certified by NETA to supervise on-site testing.

1.9DELIVERY, STORAGE, AND HANDLING

Retain first option in first paragraph below for controllers that are not required to have factory-installed space heaters; otherwise, retain second option.

A.If stored in space that is not permanently enclosed and air conditioned, remove loose packing and flammable materials from inside controllers and [install temporary electric heating, with at least 250 W per controller] [connect factory-installed space heaters to temporary electrical service].

Dimensions of VFCs, especially those with bypass systems, specialty enclosures, or various options, can vary considerably in size between manufacturers. Retain "Product Selection for Restricted Space" Paragraph below with "Basis-of-Design Product" Paragraph in "Manufacturers" Article if installation space for VFCs is limited; show maximum dimensions on Drawings. See "Installation Considerations" and "Large Equipment" articles in the Evaluations for additional guidance.

B.Product Selection for Restricted Space: Drawings indicate maximum dimensions for VFCs, including clearances between VFCs, and adjacent surfaces and other items.

1.10WARRANTY

When warranties are required, verify with Owner's counsel that special warranties stated in this article are not less than remedies available to Owner under prevailing local laws.

A.Special Warranty: Manufacturer agrees to repair or replace VFCs that fail in materials or workmanship within specified warranty period.

Verify available warranties and warranty periods for units and components.

1.Warranty Period: [Five] <Insert number> years from date of Substantial Completion.

PART 2 - PRODUCTS

Manufacturers and products listed in SpecAgent and Masterworks Paragraph Builder are neither recommended nor endorsed by the AIA or ARCOM. Before inserting names, verify that manufacturers and products listed there comply with requirements retained or revised in descriptions and are both available and suitable for the intended applications. For definitions of terms and requirements for Contractor's product selection, see Section 016000 "Product Requirements."

2.1MANUFACTURERS

A.Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1.Cerus Industrial, Inc.

2.Danfoss Inc.

3.Eaton.

4.Rockwell Automation, Inc.

5.Schneider Electric USA, Inc.

6.Siemens Industry, Inc.

7.Yaskawa Electric America, Inc.

2.2SYSTEM DESCRIPTION

Show VFC pole quantities, voltage, accessories, size and type, short-circuit current (withstand) rating (or available short-circuit currents), and enclosure type for each controller on Drawings. See "Specifying VFCs" Article and Editing Instruction No. 9 in the Evaluations for selection considerations.

Standard and optional features vary considerably among VFC manufacturers. Not all features, accessories, and options in this article are available for every rating, with every type of enclosure, and from every listed manufacturer. Also, features and options depend on motor characteristics and operating criteria of driven equipment. Verify, with manufacturer, availability and unique characteristics. Show on Drawings the features and accessories that apply to each VFC.

A.General Requirements for VFCs:

1.VFCs and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

In first subparagraph below, retain UL 508A for VFCs with UL-recognized components or retain UL 508C when the packaged enclosed controller is tested. For additional details on this selection, see Editing Instruction No. 10 in the Evaluations.

2.Comply with NEMA ICS 7, NEMA ICS 61800-2, and [UL 508A] [UL 508C] <Insert standard>.

Retain first option in "Application" Paragraph below for constant-torque loads such as positive-displacement pumps and reciprocating and screw compressors; retain second option for variable-torque loads such as centrifugal blowers, compressors, fans, and pumps.

B.Application: [Constant torque] [and] [variable torque] <Insert application>.

Low-voltage VFCs are available for use with three-phase ac motors from 1/2 to 500 hp (depending on voltage rating), and in single- or three-phase input voltages from 200- to 575-V ac; however, not all listed manufacturers may offer VFCs in all these ratings and voltage ranges. Using single-phase voltages for VFCs controlling three-phase motors may require substantial derating of the VFCs; consult manufacturers for limitations and derating requirements.

C.VFC Description: Variable-frequency motor controller, consisting of power converter that employs pulse-width-modulated inverter, factory built and tested in an enclosure, with integral disconnecting means and overcurrent and overload protection; listed and labeled by an NRTL as a complete unit; arranged to provide self-protection, protection, and variable-speed control of one or more three-phase induction motors by adjusting output voltage and frequency.

Retain one or both of first two subparagraphs below as required to support motors and driven equipment specified in other Divisions. See "Multispeed and Variable-Speed Considerations" Article in the Evaluations in Section 230513 "Common Motor Requirements for HVAC Equipment," for guidance on motor requirements and applications using VFCs. There are similar discussions in the Evaluations of the common motor requirement Sections in Divisions 11, 21, and 22.

1.Units suitable for operation of NEMA MG 1, Design A and Design B motors, as defined by NEMA MG 1, Section IV, Part 30, "Application Considerations for Constant Speed Motors Used on a Sinusoidal Bus with Harmonic Content and General Purpose Motors Used with Adjustable-Voltage or Adjustable-Frequency Controls or Both."

2.Units suitable for operation of inverter-duty motors as defined by NEMA MG 1, Section IV, Part 31, "Definite-Purpose Inverter-Fed Polyphase Motors."

3.Listed and labeled for integrated short-circuit current (withstand) rating by an NRTL acceptable to authorities having jurisdiction.

D.Design and Rating: Match load type, such as fans, blowers, and pumps; and type of connection used between motor and load such as direct or through a power-transmission connection.

Retain first option in "Output Rating" Paragraph below for variable-torque drives; retain second option for constant-torque drives.

E.Output Rating: Three phase; 10 to [
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