DFCM Addendum Cover Page, 9.2.2026

DFCM Addendum #002

Reference: USDC Raintree Mechanical Upgrades DFCM Project #25198410 U3P Event #CR27016

Date: September 25, 2026

To: Prequalified Mechanical Contractors

From: The Division of Facilities Construction and Management

Note: This Addendum shall be included as part of the Contract Documents. Items in this Addendum apply to all drawings and specification sections whether referenced or not involving the portion of the work added, deleted, modified, or otherwise addressed in the Addendum. Bidders are required to acknowledge receipt of this Addendum when their bid is submitted. Failure to do so may subject the Bidder to disqualification.

Addendum Items

Solicitation Schedule Changes: There are no changes to the Solicitation Schedule in this addendum.

DFCM Addendum Items: N/A

Click to enter text Click to enter text Click to enter text

A/E Addendum Items: A/E Addendum # 002- Dated 09/24/2026 Click to enter text

Total Attached Pages: 14

ADDENDUM #02

Project Name: USDC RAINTREE

DFCM Project #: 25198410

From: WHW Engineering LLC

8619 South Sandy Parkway Sandy, Utah 84070 Phone (801) 466-4021 Fax (801) 466-8536

To: All Bidding Contractors Addendum No: 02

Date: 09.24.26

This Addendum forms and becomes a part of the Contract Documents and modifies the original Bidding Documents dated 06.04.2024 as noted below. Acknowledge receipt of this Addendum in the space provided on the Bid Form. Failure to do so may subject the Bidder to disqualification.

This Addendum consists of 2 pages, 1 drawing and 11 specifications.

I. CHANGES/CLARIFICATIONS TO DRAWINGS:

a. ME101 – Reprinted as keynotes and general notes were overlapping.

II. CHANGES/CLARIFICATIONS TO SPECIFICATIONS:

a. This addendum includes an 11 page VFD specification

III. QUESTIONS AND ANSWERS:

Q1. Are the VFDs provided by the pump manufacturer or procured separately?

A1. Procured separately

Q2. Is there a specification available for the pump VFDs? If no specification, what is the preferred NEMA enclosure rating for the VFD?

A2. VFD spec section attached as part of this addendum

Q3. On addendum 1 sheet ME101 the General Notes are printed over top of some of the Sheet Notes. Can we get a new sheet ME101 where all of the notes are readable please.

Q3. ME101 has been reprinted and included as part of this addendum

Q4. The Note: EXISTING FIRE SPRINKLER PIPING SHALL REMAIN. PROTECT

DURING CONSTRUCTION. FIELD VERIFY. REMOVE AND REPLACE SPRINKLER

HEADS AFTER DEMOLITION. Does "replacing the heads" apply to the whole building or just in the mechanical rooms at their same location?

Q4. Mechanical rooms only.

Q5. Is there a contingency allowance that should be included in the bid?

Q5. No separate contingency allowance is required to be included in the bid.

Contractors shall include all costs necessary to complete the Work in accordance with the contract documents.

Q6. What roofing company holds the warranty and should be used for this project?

A6. Perkes Roofing is the warranty holding contractor and they must perform all roofing modifications.

PRIOR APPROVALS

THE FOLLOWING ITEMS, AS SUBMITTED, ARE CONSIDERED, IN GENERAL AND IN NAME ONLY, AS EQUAL TO THOSE ITEMS SPECIFIED. THIS REVIEW DOES NOT RELIEVE THE CONTRACTOR OR SUPPLIER OF THE RESPONSIBILITY OF CONFORMING TO THE DRAWINGS AND SPECIFICATIONS, NOR DOES IT RELIEVE THE CONTRACTOR OF THE REQUIREMENTS OF THE SPECIFICATIONS FOR COORDINATION WITH OTHER TRADES. ALL DIMENSIONS SHALL BE CONFIRMED AND CORRELATED AT THE JOBSITE. THE CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFYING EXISTING CONDITIONS AND THE SUITABILITY OF “EQUAL” PRODUCTS FOR THE SPECIFIED APPLICATION.

Description Manufacturer

Flexible Connectors Flex Hose

Modular indoor Air Handling Units Pace

Test and Balance BCS

Water Softener North Star

DMV-1 Lawler

Expansion Tanks American Wheatley

Cabinet Heaters Sterling HVAC

Air Handling Units Klimor

Hydronic Air Handler Coils Nationwide Coils

Hydronic Pumps Wilo

Hydronic Expansion Tanks Patterson

Air Separator Patterson

Automatic Air Vents Watson McDaniel

Y Strainers Griswold; Watts; Titan

Meter and Gauges Dwyer Instruments

Heat Exchangers Patterson; Polaris; DHT; Kelvion

Cabinet Heaters Sigma; Beacon Morris

Domestic Hot water Recirc Pumps Wilo

Potable Water Storage Tank Niles

Domestic Hot Water Generator Niles; Kelvion; DHT; RBI

Domestic Expansion Tank Patterson

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CONSULTANTS

PROJECT NAME & ADDRESS

CODE REVIEW STAMP

SHEET NO.

PROJECT MANAGER:

DATE:

CHECKED BY:

DRAWN BY:

REVISIONDATEMARK

06/04/2024

WHW JOB NO.:

24053

A

B

C

D

1 2 3

1 2 3

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B

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SHEET TITLE

WP

DL

USDC RAINTREE

MECHANICAL

UPGRADES

DFCM#25198410

1084 N 800 E

American Fork, UT 84003

CC 08/02/2024

1 Date 1 Addendum 01

MECHANICAL PLAN

ME101

1/8" = 1'-0"

MECHANICAL PLAN

SHEET NOTES

1 SEE SHEET ME401 FOR LARGE SCALE PLAN OF THIS

LOCATION.

2 SEE SHEET ME402 FOR LARGE SCALE PLAN OF THIS

LOCATION.

3 SEE SHEET ME403 FOR LARGE SCALE PLAN OF THIS

LOCATION.

4 SEE SHEET ME404 FOR LARGE SCALE PLAN OF THIS

LOCATION.

0'

SCALE : 1/8" = 1'-0"

8'4' 24'16'

GENERAL NOTES:

1. CONTRACTOR SHALL FIELD VERIFY

EXISTING MECHANICAL, STRUCTURAL,

ELECTRICAL AND ARCHITECTURAL

CONDITIONS, INCLUDING, BUT NOT LIMITED

TO; EXISTING ROUTING AND LOCATION OF

DUCTWORK, PIPING, ELECTRICAL, AND

STRUCTURAL ELEMENTS. CONTRACTOR SHALL

FIELD VERIFY ANY POTENTIAL CONFLICTS

BETWEEN NEW MECHANICAL ELEMENTS AND

EXISTING CONDITIONS PRIOR TO BEGINNING

FABRICATION OR ORDERING NEW EQUIPMENT.

2. PRIME CONTRACTOR SHALL PROVIDE ALL

COORDINATION BETWEEN SUB-TIER

CONTRACTORS. THIS SHALL INCLUDE THE

COORDINATION BETWEEN SUB-TIER

CONTRACTORS, SUB-TIER CONTRACTORS AND

FACILITIES, SUB-TIER CONTRACTORS AND

ARCHITECT/ENGINEER, ETC.

3. PROTECT THE INSULATION ON STRUCTURE

AND CEILING. CONTRACTOR SHALL BE

RESPONSIBLE TO REPAIR ANY DAMAGE TO

BUILDING DURING THE CONSTRUCTION

PROCESS.

4. EXISTING FIRE SPRINKLER PIPING SHALL

REMAIN. PROTECT DURING CONSTRUCTION.

FIELD VERIFY. REMOVE AND REPLACE

SPRINKLER HEADS AFTER DEMOLITION.

5. CONTRACTOR SHALL MAKE PROVISIONS

WITH A DESIGN-BUILD CONTRACTOR SHALL

PROVIDE NEW WIRING, CIRCUIT BREAKERS,

PANELS, CONDUIT, SWITCH GEARS, AND ALL

NECESSARY ELECTRICAL ACCOMODATIONS

FOR ANY NEW OR RE-LOCATED EQUIPMENT.

CONTRACTOR SHALL COORDINATE THE

DEMOLITION AND REMOVAL OF ANY

ELECTRICAL ELEMENTS ASSOCIATED WITH

EXISTING MECHANICAL EQUIPMENT. ALL

ABANDONED PIPING AND WIRING SHALL BE

REMOVED BACK TO PANEL UNLESS

OTHERWISE APPROVED. ELECTRICIAN SHALL

FIELD VERIFY AND CONFIRM ELECTRICAL

SCOPE AND EXISING CONDITIONS PRIOR TO

ANY DEMOLITION WORK OR ORDERING ANY

NEW MECHANICAL EQUIPMENT. ALL

ELECTRICAL WIRING AND CONTROLS SHALL

BE ROUTED IN CONDUIT.

6. PROVIDE A FULL TEST AND BALANCE

REPORT BY A LICENSED AND APPROVED TEST

AND BALANCE CONTRACTOR.

7. THE INTENT OF THE SCOPE OF WORK IS TO

REMOVE AND REPLACE ALL EXISTING

MECHANICAL EQUIPMENT LOCATED IN THE

MECHANICAL ROOMS. FIELD VERIFY ALL

EQUIPMENT, DUCTWORK AND PIPING COMING

INTO AND OUT OF THE MECHANICAL ROOM TO

ENSURE ALL SYSTEMS WORK AS DESIGNED.

8. COORDINATE WITH USDC FOR WHICH

DESIRED DEMOLISHED EQUIPMENT IS TO BE

SALAVAGED BACK TO OWNER FOR PARTS.

FIELD VERIFY.

9. ALL DEMOLISHED EQUIPMENT AND

MATERIAL SHALL BE BROKEN DOWN TO FIT

THROUGH EXISTING DOOR, OPENINGS, AND

HATCHES. FIELD VERIFY EXACT SCOPE OF

DEMOLITION AND REMOVAL PATH.

CONTRACTOR SHALL BE RESPONSIBLE TO

REPAIR ANY DAMAGE TO BUILDING DURING

REMOVAL OF EQUIPMENT AND MATERIAL.

10. CONTRACTOR SHALL COORDINATE WITH

DFCM PROVIDED HAZMAT REPORT AND

ABATEMENT CONTRACTOR PRIOR TO THE

DEMOLITION OF ANY EQUIPMENT, DUCTWORK,

DUCT INSULATION, PIPING, PIPE INSULATION,

ETC.

SHEET NOTES

5 PROVIDE NEW CEILING MOUNTED CABINET UNIT

HEATER IN THIS APPROXIMATE LOCATION. TIE INTO

EXISTING MECHANICAL PIPING. PROVIDE ALL NEW

CONTROLS AND VALVES AND TIE INTO NEW BMS.

PROVIDE WITH NEW TEMPERATURE SENSOR. FIELD

VERIFY.

6 AFTER ABATEMENT HAS REMOVED THE CEILING

FROM THE HALLWAY, PROVIDE NEW DROP CEILING

IN ITS PLACE. COORDINATE WITH ELECTRICIAN TO

PROVIDE NEW LIGHTING COMPATIBLE WITH NEW

CEILING. FIELD VERIFY.

7 PROVIDE NEW HYDRONIC BASEBOARD HEATER IN

THIS APPROXIMATE LOCATION. TIE INTO EXISTING

HYDRONIC PIPING. COORDINATE WITH BASEBOARD

MANUFACTUER TO MATCH INDIVIDUAL ROOM PIPING

OPTIONS TO MATCH EXISTING. PROVIDE WITH NEW

THERMOSTAT AND CONTROLS. FIELD VERIFY.

8 REMOVE AND REPLACE EXISTING CEILING FAN IN

THIS APPROXIMATE LOCATION. TIE INTO EXISTING

DUCTWORK. FAN SHALL RUN CONTINUOUSLY. FIELD

VERIFY.

9 REMOVE AND REPLACE EXISTING ROOF MOUNTED

EXHAUST FAN IN THIS APPROXIMATE LOCATION. TIE

INTO EXISTING DUCTWORK. FAN SHALL RUN

CONTINUOUSLY. FIELD VERIFY.

VARIABLE FREQUENCY CONTROLLERS 262923 - 1

USDC RAINTREE

MECHANICAL UPGRADES

DFCM PROJECT #25198410

SECTION 262923 - VARIABLE FREQUENCY CONTROLLERS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes solid-state, PWM, VFCs for speed control of three-phase, squirrel-cage induction motors.

B. Related Sections include the following:

1. Division 26 Common Work Results

1.3 DEFINITIONS

A. BMS: Building management system.

B. IGBT: Integrated gate bipolar transistor.

C. LAN: Local area network.

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

E. PWM: Pulse-width modulated.

F. VFC: Variable frequency controller.

1.4 SUBMITTALS

A. Product Data: For each type of VFC. Include dimensions, mounting arrangements, location for conduit entries, shipping and operating weights, and manufacturer's technical data on features, performance, electrical ratings, characteristics, and finishes.

B. Shop Drawings: For each VFC.

1. Include dimensioned plans, elevations, sections, and details, including required clearances and service space around equipment. Show tabulations of installed devices, equipment features, and ratings. Include the following:

a. Each installed unit's type and details.

VARIABLE FREQUENCY CONTROLLERS 262923 - 2

b. Nameplate legends.

c. Short-circuit current rating of integrated unit.

d. Listed and labeled for series rating of overcurrent protective devices in combination controllers by an NRTL acceptable to authorities having jurisdiction.

e. Features, characteristics, ratings, and factory settings of each motor-control center unit.

2. Wiring Diagrams: Power, signal, and control wiring for VFCs. Provide schematic wiring diagram for each type of VFC.

C. Coordination Drawings: Floor plans, drawn to scale, showing dimensioned layout, required working clearances, and required area above and around VFCs where pipe and ducts are prohibited. Show VFC layout and relationships between electrical components and adjacent structural and mechanical elements. Show support locations, type of support, and weight on each support. Indicate field measurements.

D. Manufacturer Seismic Qualification Certification: Submit certification that VFCs, accessories, and components will withstand seismic forces defined in Division 16 Section "Electrical Supports and Seismic Restraints." Include the following:

1. Basis for Certification: Indicate whether withstand certification is based on actual test of assembled components or on calculation.

a. 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."

b. 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."

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.

E. Qualification Data: For [manufacturer] [testing agency] [manufacturer and testing agency].

F. Field quality-control test reports.

G. Operation and Maintenance Data: For VFCs, all installed devices, and components to include in emergency, operation, and maintenance manuals. In addition to items specified in Division 1 Section "Operation and Maintenance Data," include the following:

1. Routine maintenance requirements for VFCs and all installed components.

2. Manufacturer's written instructions for testing and adjusting overcurrent protective devices.

VARIABLE FREQUENCY CONTROLLERS 262923 - 3

H. 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.

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

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: A qualified manufacturer. Maintain, within 100 miles of Project site, a service center capable of providing training, parts, and emergency maintenance and repairs.

B. Testing Agency Qualifications: An independent agency, with the experience and capability to conduct the testing indicated, that is a member company of the InterNational Electrical Testing Association or is a nationally recognized testing laboratory (NRTL) as defined by OSHA in 29 CFR 1910.7, and that is acceptable to authorities having jurisdiction.

1. Testing Agency's Field Supervisor: Person currently certified by the InterNational Electrical Testing Association or the National Institute for Certification in Engineering Technologies to supervise on-site testing specified in Part 3.

C. Source Limitations: Obtain VFCs of a single type through one source from a single manufacturer.

D. 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.

E. Comply with NFPA 70.

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

Comply with indicated maximum dimensions and clearances.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver VFCs in shipping splits of lengths that can be moved past obstructions in delivery path as indicated.

B. Store VFCs indoors in clean, dry space with uniform temperature to prevent condensation. Protect VFCs from exposure to dirt, fumes, water, corrosive substances, and physical damage.

C. If stored in areas subject to weather, cover VFCs to protect them from weather, dirt, dust, corrosive substances, and physical damage. Remove loose packing and

VARIABLE FREQUENCY CONTROLLERS 262923 - 4

flammable materials from inside controllers; install electric heating of sufficient wattage to prevent condensation.

1.7 PROJECT CONDITIONS

A. Environmental Limitations: Rate equipment for continuous operation, capable of driving full load without derating, under the following conditions, unless otherwise indicated:

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

Comply with indicated maximum dimensions.

1.8 COORDINATION

A. Coordinate layout and installation of VFCs 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 features of VFCs, installed units, and accessory devices with pilot devices and control circuits to which they connect.

C. Coordinate features, accessories, and functions of each VFC and each installed unit with ratings and characteristics of supply circuit, motor, required control sequence, and duty cycle of motor and load.

1.9 EXTRA MATERIALS

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

1. Spare Fuses: Furnish one spare for every five installed, but no fewer than one set of three of each type and rating.

2. Indicating Lights: Two of each type installed.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

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

1. ABB Power Distribution, Inc.; ABB Control, Inc. Subsidiary.

2. Mitsubishi

3. Eaton Corporation; Cutler-Hammer Products.

VARIABLE FREQUENCY CONTROLLERS 262923 - 5

4. Yaskawa

5. Prior approved equal

2.2 VARIABLE FREQUENCY CONTROLLERS

A. Description: NEMA ICS 2, IGBT, PWM, VFC; listed and labeled as a complete unit and arranged to provide variable speed of an NEMA MG 1, Design B, 3-phase induction motor by adjusting output voltage and frequency.

1. Provide unit suitable for operation of premium-efficiency motor as defined by

NEMA MG 1.

B. 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.

C. Output Rating: 3-phase; 6 to 60 Hz, with voltage proportional to frequency throughout voltage range.

D. Unit Operating Requirements:

1. Input frequency tolerance of 50/60 Hz, plus or minus 6 percent.

2. Minimum Efficiency: 96 percent at 60 Hz, full load.

3. Minimum Displacement Primary-Side Power Factor: 96 percent.

4. Overload Capability: 1.1 times the base load current for 60 seconds; 2.0 times the base load current for 3 seconds.

5. Starting Torque: 100 percent of rated torque or as indicated.

6. Speed Regulation: Plus or minus 1 percent.

E. Isolated control interface to allow controller to follow control signal over an 11:1 speed range.

1. Electrical Signal: 4 to 20 mA at 24 V.

F. Internal Adjustability Capabilities:

1. Minimum Speed: 5 to 25 percent of maximum rpm.

2. Maximum Speed: 80 to 100 percent of maximum rpm.

3. Acceleration: 2 to a minimum of 22 seconds.

4. Deceleration: 2 to a minimum of 22 seconds.

5. Current Limit: 50 to a minimum of 110 percent of maximum rating.

G. Self-Protection and Reliability Features:

1. Input transient protection by means of surge suppressors.

2. Under- and overvoltage trips; inverter overtemperature, overload, and overcurrent trips.

3. Motor Overload Relay: Adjustable and capable of NEMA ICS 2, Class 10 performance.

4. Notch filter to prevent operation of the controller-motor-load combination at a natural frequency of the combination.

VARIABLE FREQUENCY CONTROLLERS 262923 - 6

5. Instantaneous line-to-line and line-to-ground overcurrent trips.

6. Loss-of-phase protection.

7. Reverse-phase protection.

8. Short-circuit protection.

9. Motor overtemperature fault.

H. Multiple-Motor Capability: Controller suitable for service to multiple motors and having a separate overload relay and protection for each controlled motor. Overload relay shall shut off controller and motors served by it when overload relay is tripped.

I. Automatic Reset/Restart: Attempts three restarts after controller fault or on return of power after an interruption and before shutting down for manual reset or fault correction. Bidirectional autospeed search shall be capable of starting into rotating loads spinning in either direction and returning motor to set speed in proper direction, without damage to controller, motor, or load.

J. Power-Interruption Protection: To prevent motor from re-energizing after a power interruption until motor has stopped.

K. Torque Boost: Automatically varies starting and continuous torque to at least 1.5 times the minimum torque to ensure high-starting torque and increased torque at slow speeds.

L. Motor Temperature Compensation at Slow Speeds: Adjustable current fall-back based on output frequency for temperature protection of self-cooled, fan-ventilated motors at slow speeds.

M. Input Line Conditioning: Line reactors

N. Status Lights: Door-mounted LED indicators shall indicate the following conditions:

1. Power on.

2. Run.

3. Overvoltage.

4. Line fault.

5. Overcurrent.

6. External fault.

O. Panel-Mounted Operator Station: Start-stop and auto-manual selector switches with manual speed control potentiometer and elapsed time meter.

P. Indicating Devices: Meters or digital readout devices and selector switch, mounted flush in controller door and connected to indicate the following controller parameters:

1. Output frequency (Hz).

2. Motor speed (rpm).

3. Motor status (running, stop, fault).

4. Motor current (amperes).

5. Motor torque (percent).

6. Fault or alarming status (code).

VARIABLE FREQUENCY CONTROLLERS 262923 - 7

7. PID feedback signal (percent).

8. DC-link voltage (VDC).

9. Set-point frequency (Hz).

10. Motor output voltage (V).

Q. Control Signal Interface:

1. Electric Input Signal Interface: A minimum of 2 analog inputs (0 to 10 V or 0/4-20 mA) and 6 programmable digital inputs.

2. Remote Signal Inputs: Capability to accept any of the following speed-setting input signals from the BMS or other control systems:

a. 0 to 10-V dc.

b. 0-20 or 4-20 mA.

c. Potentiometer using up/down digital inputs.

d. Fixed frequencies using digital inputs.

e. RS485.

f. Keypad display for local hand operation.

3. Output Signal Interface:

a. A minimum of 1 analog output signal (0/4-20 mA), which can be programmed to any of the following:

1) Output frequency (Hz).

2) Output current (load).

3) DC-link voltage (VDC).

4) Motor torque (percent).

5) Motor speed (rpm).

6) Set-point frequency (Hz).

4. Remote Indication Interface: A minimum of 2 dry circuit relay outputs (120-V ac, 1 A) for remote indication of the following:

a. Motor running.

b. Set-point speed reached.

c. Fault and warning indication (overtemperature or overcurrent).

d. PID high- or low-speed limits reached.

R. Communications: Provide an RS485 interface allowing VFC to be used with an external system within a multidrop LAN configuration. Interface shall allow all parameter settings of VFC to be programmed via BMS control. Provide capability for VFC to retain these settings within the nonvolatile memory.

S. Integral Disconnecting Means: NEMA KS 1, fusible switch with lockable handle.

T. Isolating Switch: Non-load-break switch arranged to isolate VFC and permit safe troubleshooting and testing, both energized and de-energized, while motor is operating in bypass mode.

VARIABLE FREQUENCY CONTROLLERS 262923 - 8

U. Remote Indicating Circuit Terminals: Mode selection, controller status, and controller fault.

2.3 ACCESSORIES

A. Devices shall be factory installed in controller enclosure, unless otherwise indicated.

B. Push-Button Stations, Pilot Lights, and Selector Switches: NEMA ICS 2, heavy-duty type.

C. Stop and Lockout Push-Button Station: Momentary-break, push-button station with a factory-applied hasp arranged so padlock can be used to lock push button in depressed position with control circuit open.

D. Control Relays: Auxiliary and adjustable time-delay relays.

E. Standard Displays:

1. Output frequency (Hz).

2. Set-point frequency (Hz).

3. Motor current (amperes).

4. DC-link voltage (VDC).

5. Motor torque (percent).

6. Motor speed (rpm).

7. Motor output voltage (V).

F. Historical Logging Information and Displays:

1. Real-time clock with current time and date.

2. Running log of total power versus time.

3. Total run time.

4. Fault log, maintaining last four faults with time and date stamp for each.

G. Current-Sensing, Phase-Failure Relays for Bypass Controller: Solid-state sensing circuit with isolated output contacts for hard-wired connection; arranged to operate on phase failure, phase reversal, current unbalance of from 30 to 40 percent, or loss of supply voltage; with adjustable response delay.

2.4 FACTORY FINISHES

A. Finish: Manufacturer's standard paint applied to factory-assembled and -tested VFCs before shipping.

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PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine areas, surfaces, and substrates to receive VFCs for compliance with requirements, installation tolerances, and other conditions affecting performance.

B. Examine roughing-in for conduit systems to verify actual locations of conduit connections before VFC installation.

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

3.2 APPLICATIONS

A. Select features of each VFC to coordinate with ratings and characteristics of supply circuit and motor; required control sequence; and duty cycle of motor, controller, and load.

B. Select horsepower rating of controllers to suit motor controlled.

3.3 INSTALLATION

A. Anchor each VFC assembly to steel-channel sills arranged and sized according to manufacturer's written instructions. Attach by bolting. Level and grout sills flush with mounting surface.

B. Controller Fuses: Install fuses in each fusible switch.

3.4 IDENTIFICATION

A. Identify VFCs, components, and control wiring according to Division 16 Section "Electrical Identification."

B. Operating Instructions: Frame printed operating instructions for VFCs, including control sequences and emergency procedures. Fabricate frame of finished metal, and cover instructions with clear acrylic plastic. Mount on front of VFC units.

3.5 CONTROL WIRING INSTALLATION

A. Install wiring between VFCs and remote devices according to Division 16 Section "Conductors and Cables."

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

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C. Connect hand-off-automatic switch and other automatic-control devices where applicable.

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

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

3.6 CONNECTIONS

A. Conduit installation requirements are specified in other Division 126 Sections.

Drawings indicate general arrangement of conduit, fittings, and specialties.

B. Ground equipment according to Division 26.

3.7 FIELD QUALITY CONTROL

A. Prepare for acceptance tests as follows:

1. Test insulation resistance for each enclosed controller element, bus, component, connecting supply, feeder, and control circuit.

2. Test continuity of each circuit.

B. Manufacturer's Field Service: Engage a factory-authorized service representative to perform the following:

1. Inspect controllers, wiring, components, connections, and equipment installation. Test and adjust controllers, components, and equipment.

2. Assist in field testing of equipment including pretesting and adjusting of solid-state controllers.

3. Report results in writing.

C. Testing Agency: Owner will engage a qualified testing and inspecting agency to perform field tests and inspections and prepare test reports.

D. Testing Agency: Engage a qualified testing and inspecting agency to perform the following field tests and inspections and prepare test reports:

E. Perform the following field tests and inspections and prepare test reports:

1. Perform each electrical test and visual and mechanical inspection, except optional tests, stated in NETA ATS. Certify compliance with test parameters.

2. Correct malfunctioning units on-site, where possible, and retest to demonstrate compliance; otherwise, replace with new units and retest.

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3.8 ADJUSTING

A. Set field-adjustable switches and circuit-breaker trip ranges.

3.9 DEMONSTRATION

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain variable frequency controllers. Refer to Division 1 Section "Demonstration and Training."

END OF SECTION 16269