23_09_23_direct_digital_control_for_hvac.pdf

MEDICAL REFERENCE LAB Proj. No. 04001400001

USMCFP SPRINGFIELD, SPRINGFIELD, MO AMENDMENT 8/27/2015

FINAL CONSTRUCTION DOCUMENTS

PROPERTY OF THE UNITED STATES GOVERNMENT

SENSITIVE BUT UNCLASSIFIED

Properly destroy documents/media when no longer needed.

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SECTION 23 09 23 - DIRECT-DIGITAL CONTROL FOR HVAC

PART 1 - GENERAL REQUIREMENTS

1.1 SUMMARY

A. Furnish and install a complete Automatic Temperature Control System. The system shall be complete in all respects including labor, materials, equipment, and services necessary, and shall be installed by personnel regularly employed by the manufacturer.

B. This system shall consist of all necessary hardware and all operating and applications software necessary to perform the control sequences of operation as called for in the Specifications and Drawings. All software required shall be turned over to the Owner ready for use including all operation parameters, setpoints and schedules.

C. The system hardware shall consist of field Stand-Alone Direct Digital Controllers (DDC).

D. The Drawings and Specifications are not intended to show all details. The Controls Contractor shall secure satisfactory information before submitting the proposal and include in the proposal a sum sufficient to cover all items of labor and material required or the complete installation for the devices and system described.

E. All work performed under this section of the Specifications shall comply with all codes, laws and governing bodies. If the Drawings and/or Specifications are in conflict with governing codes, the Contractor shall submit a proposal with appropriate modifications to the project to meet code restrictions. If this Specification and associated Drawings exceed governing code requirements, the Specification will govern.

F. The Controls Contractor shall execute his work in such a manner as to cause the minimum interference to the operation of the building.

1.2 COORDINATED WORK

A. The Controls Contractor shall cooperate with other contractors performing work on this project necessary to achieve a complete and neat installation. Each Contractor shall consult the Drawings and Specifications for all trades to determine the nature and extent of others work.

1.3 CONTRACTOR QUALIFICATIONS

A. Qualified Bidders: System shall be the product line as listed and as manufactured, installed and serviced by those listed below. The bidder shall the a factory branch office or factory authorized representative. Distributers are not acceptable.

Manufacturer Product Line

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1. Automated Logic Corp. InterOp

2. Johnson Controls, Inc. Metasys

3. Siemens Building Technologies, Inc. APOGEE

4. Schneider Electric Smart Struxure

B. Experience:

1. The Controls Contractor shall have a minimum of ten years experience in manufacturing, installing, and servicing computerized control systems.

a. All personnel of the Controls Contractor shall have a minimum of three years of experience within their appropriate trades.

2. All subcontractors utilized by the Controls Contractor shall have a minimum of five years experience within their appropriate trades.

C. Personnel, Coverage and Response Capabilities: The Controls Contractor shall have a fully staffed office with service technicians and systems engineers within a 50 mile radius of the project location.

D. Parts Stocking: The Controls Contractor shall have an independently verifiable inventory of electronic service parts. This electronic service parts inventory must have a worth of at least $100,000 per year over the last five years.

E. Past Projects: The Controls Contractor shall have completed a minimum of twenty projects within the last five years which are at least equal in dollar value and scope to this project. A list of similar projects, dollar volume, scope, contact name and contact number shall be provided by the Controls Contractor if asked for by the owner.

1.4 DEFINITIONS

A. The following definitions shall apply to work performed under this Division:

1. High voltage: 50 volts or higher.

2. Low voltage: Below 50 volts.

3. Control Wiring: Includes conduit, wire and wiring devices to install complete control systems including motor control circuits, interlocks, thermostats, EP and IP switches and like devices. Includes all wiring from Intelligent Devices and Controllers to all sensors and points defined in the input/output summary shown on the drawings or specified herein and required to execute the sequence of operations

4. Point: Point is a generic term used to describe a single item of information in a control system. Points may be further described as input, output, digital, binary, discrete, analog, modulating, internal, external, virtual or global. Each unique point used by digital controllers, or in digital control systems, is typically identified by an address.

1.5 WARRANTY

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A. Provide extended warranty for control devices and equipment as specified herein.

1.6 CONTRACTOR RESPONSIBILITIES

A. Contractor responsibilities shall include the following but shall not be limited to:

1. Controls Contractor:

a. Installation of the controls shall be by the Controls Contractor or his subcontractors. Unless noted otherwise, all control wiring shall be the responsibility of the Controls Contractor.

b. All control wiring at 50 volts and above shall be installed by a qualified Electrician.

c. Control wiring under 50 volts may be installed by the Contractor furnishing it.

d. All interlock wiring such as exhaust fan interlocked to supply fan, regardless of voltage.

2. Sheet Metal Contractor:

a. Setting of automatic control dampers, smoke control dampers, and necessary blank off plates.

b. Access doors where and as required.

3. Mechanical Contractor:

a. Installation of immersion wells and pressure tappings.

b. Installation of flow switches.

c. Setting of automatic control valves.

d. Installation of pressure tappings and associated shut-off cocks.

4. Electrical Contractor:

a. Rough-in of all conduits and wall boxes in concrete and block walls for sensors, thermostats and temperature control devices, etc.

b. All power wiring to mechanical equipment and temperature control cabinets.

1.7 ELECTRICAL WORK FOR CONTROLS:

A. Complying with the principle of "unit responsibility" all electrical work for automatic controls, except as otherwise specified, or shown on the electrical drawings shall be included in this Section.

B. Electrical work shall, in general, comply with the following:

1. All electrical work shall comply with the NEC, Division 26 of the Specifications and local electrical codes.

2. All low voltage wiring in finished rooms shall be concealed.

3. All low voltage wiring in unfinished rooms shall be concealed below nine feet and may be exposed above.

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4. All safety devices shall be wired through both hand and auto positions of motor starting device to ensure 100% safety shut-off.

5. All magnetic starters furnished by Electrical Contractor for mechanical equipment shall be furnished with integral 120 volt control transformers, sized to handle the additional VA needed for the controls - pilots, EP valves, etc.

6. The motor starter supplier shall provide auxiliary contacts as required for interlock by Controls Contractor, the supplier shall estimate an allowance of at least one auxiliary contact per starter. All interlock and control wiring shown on the electrical prints is by the Electrical Contractor.

7. Low voltage plenum rated wiring can be run exposed above working heights in equipment rooms and above accessible ceiling. Wiring shall be neatly tied to pipes, EMT or other devices and not laid on ceiling tile.

1.8 SUBMITTALS, DRAWINGS AND LAYOUTS

A. The controls manufacturer shall submit product data, shop drawings, description of operation and schematic drawings of the System to the Engineer for approval before starting work. At least seven sets of submittals shall be sent through channels. At least four sets of operator and maintenance manuals with "as built" drawings, parts lists, etc., shall be provided at job completion. The Engineer will note any required corrections and return to the Contractor. The Contractor shall then resubmit with the corrected or additional data. This procedure shall be repeated until all corrections are made to the satisfaction of the Engineer and the submittals are fully approved.

B. All control drawings shall be generated using AutoCAD software or equivalent. All project drawings shall be supplied to the Owner on an MS-DOS formatted diskette using the DXF file format or format as desired by the Owner upon project completion.

C. Product Data: Submit manufacturer’s technical product data for each control device furnished, indicating dimensions, capacities, performance characteristics, electrical characteristics, finishes of materials, and including installation instructions and start-up instructions.

D. Shop drawings shall include a riser diagram depicting locations of all controllers and work stations, with associated network wiring. Also included shall be individual schematics of each mechanical system showing all connected points with reference to their associated controller.

Typicals will be allowed where appropriate.

E. Maintenance Data: Submit maintenance data and recommended spare parts list for digital control equipment and control components; including "trouble-shooting" maintenance guide.

Include this data, product data, shop drawings, final software code for sequences of operation and maintenance data in maintenance manual; in accordance with requirements of Division 1.

1.9 CONSTRUCTION RECORD DOCUMENTS

A. All additions or changes to the CONTROLS during the course of construction shall be reflected

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upon the CAD drawings and submitted to the Engineer before project close-out.

1.10 CONTROL EQUIPMENT AND DEVICES

A. The control system shall include all necessary and specified control equipment properly installed in accordance with specifications and drawings, and shall include the automatic control systems:

1. Heating hot water systems

2. 100% outside air systems

3. Laboratory Exhaust Fan Systems

4. Humidifiers

B. Control Dampers

1. Dampers required in the temperature functions of the automatic control system shall be factory fabricated. All dampers shall be sized as shown on drawings or as specified.

2. All damper frames shall have a flange for duct mounting.

3. The blades shall be parallel or opposed, as required, and suitable for the air velocities to be encountered in the system.

4. Damper blades shall not exceed 6" in width. Blades are to be suitable for high velocity performance. Damper blades shall be a maximum of 48" long. Longer units shall be fabricated in sections.

5. Replaceable Butyl rubber seals are to be provided on damper blades and installed along with the top and bottom of the frame. Jamb seals shall be installed inside the frame sides.

Seals and bearings shall be able to withstand temperatures ranging from -40°F to 200°F.

6. Dampers for control of outside air air shall be Ruskin CD-50 or equivalent extruded aluminum, low leakage damper, with nylon bearings and blade and frame seals on all mating surfaces. Damper leakage shall not exceed 4.0 CFM/square foot in full closed position at 1" WG pressure differential across damper.

7. All other dampers shall be equal to Ruskin CD-35 or equivalent with 16 gauge steel blades, 16 gauge steel channel frame, oilite bronze bearings, cadmium plated shafts and blade and jamb seals.

C. Control Valves

1. Control Valves shall be furnished by the Controls contractor and sized by the control manufacturer to meet the heating and cooling loads as specified. All control valves shall be suitable for the pressure conditions and shall close against the differential pressures involved.

2. Nominal body rating shall be not less than 150 PSI. However, the valve body and packing selected shall be sized to withstand the system static head plus the maximum pump head and the maximum temperature of the control medium (i.e. chilled water, steam, hot water, etc.).

3. Flow Characteristics: Valves for water service shall have equal percentage flow characteristics. Valves for steam service shall have linear flow characteristics.

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4. Two-way modulating valves shall have close-off ratings exceeding the maximum pressure difference, at any load condition, between the outlet and inlet.

5. Each valve shall be equipped with proper packing to assure there will be no leakage at the valve stem.

D. Operators

1. A damper or valve operator shall be provided for each automatic damper or valve and shall be of sufficient capacity to operate the damper or valve under all conditions and to guarantee tight close-off of dampers or valves as specified against system pressure encountered.

2. Each operator shall be of “Fail-in-Place” design except as follows: Pre-heat coils, return air dampers and other devices needing fail safe operation to account for low temperatures shall be provided with spring-return for Fail-Open. Humidifiers, hot water generator steam valves, outside air dampers and other devices needing fail safe operation to account for freeze protection, power failure, overheating or moisture damage shall be provided with spring-return for Fail-Closed.

3. Damper and valve operators shall be manufactured by Belimo, Johnson Controls or approved equal.

E. Sensors and Controllers: Install space sensors, thermostats and humidistats at 48” above finished floor to meet ADA requirements unless otherwise noted on the plans.

1. Pressure Sensor/Transmitter: Sensor span shall be not less than 150 percent and not more than 300 percent of the working pressure. Accuracy shall be 0.5 percent of calibrated span.

Static pressure and differential pressure analog sensors shall be diaphragm type with solid state pre-amplifier. Transmitter shall produce a linear 4 to 20 ma or 0 to 10 V dc output corresponding to the sensed pressure measurement. Transmitter shall have offset and span adjustments. Unless otherwise noted or shown, locate static pressure sensors for variable air volume air handling units 2/3 of the duct distance downstream of the supply fan

2. Low Limit Thermostats shall be of manual reset type, with setpoint adjustment. The sensing element shall be 20 foot minimum and shall be installed completely across the coil.

When any one foot of the element senses a temperature as low as the setpoint, the thermostat contacts shall open. These shall contain double pole switches for simultaneous remote alarms or as desired. Thermostat shall be Johnson Controls A70 or equivalent.

3. Duct Type Temperature Transmitter shall be a general purpose sensing element, moisture resistant transmitter for mounting into a duct. The operating range shall be as indicated with an accuracy of + 1% over the full range. The output shall be compatible with the panel it serves.

4. Duct Averaging Type Temperature Transmitter shall be a general purpose sensing element, moisture resistant transmitter for mounting into a duct. The operating range shall be as indicated with an accuracy of + 1% over the full range. The output shall be compatible with the panel it serves. Transmitter shall be with 17 feet of sensor capillary.

5. Space Temperature Transmitter shall contain an sensing element to monitor room air temperatures in the range of 30°F to 90°F, unless indicated otherwise. The transmitter shall be factory calibrated to an accuracy of + 1%. The assembly shall be installed within a metal ventilated enclosure suitable for wall mounting. The output shall be an compatible

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with the panel it serves. Transmitter shall be factory calibrated to an accuracy of + 1% over the full range.

6. Pipe Temperature Transmitter shall contain an sensing element to monitor water temperature. The Contractor shall provide brass wells of sufficient size for the pipe to be installed. The output shall be compatible with the panel it serves. Transmitter shall be factory calibrated to an accuracy of + 1% over the full range.

7. Outdoor Air Temperature Transmitter shall contain a sensing element mounting in an enclosure rated for outdoor use. The output shall be compatible with the panel it serves.

Transmitter shall be factory calibrated to an accuracy of + 1% over the full range.

8. Humidity Transmitter Duct shall be capable of providing continuous measurement of percent relative humidity with an accuracy of + 4% over the range of 10 to 80% RH. The output shall be proportional VDC over a cable pair.

9. Pressure Transducer for air, water or steam service shall have a stainless steel sensor. The device shall output a 4-20 ma signal which is linear in relation to the sensed pressure.

Accuracy shall be + .05% of the full scale. Power shall be from the controller and range from 22-26 volts DC. The unit shall have temperature compensation so that thermal effects are no more than + .05% of the full scale from 0°F to 175°F. The unit shall be suitable for the media and pressure measured. On steam systems, provide pressure sensors with a pigtail siphon between the sensor isolation valve and sensor.

10. Differential Pressure Transducer for air or water service shall have a stainless steel sensor.

The device shall output a 0-5 volt DC or 4-20 ma signal which is linear in relation to the sensed pressure. Accuracy shall be + .01% of full scale. The power shall be from the controller and shall be in the range of 22-26 volts DC. The unit shall have temperature compensation so that thermal effects are no more than + .05% of the full scale from 32°F to 100°F. The transducer shall be suitable for the media and pressure measured

11. Current Transformers:

a. Current transformers shall be designed to be installed or removed without dismantling the primary bus or cables. The transformer shall be of a split core design.

b. The core and windings shall be completely encased in a UL approved thermoplastic rated 94VA. No metal parts shall be exposed other than the terminals.

c. Current transformers shall meet the following specifications:

1) Frequency Limits: 50 to 400 Hz.

2) Insulation: 0.6 KV Class, 10 KV BIL.

3) Accuracy: ± 1% at 5.0 to 25.0 VA accuracy class with U.P.F. burden.

d. Provide a disconnect switch for each current transformer.

12. Current Sensing Switches

a. Current sensing switch shall be self-powered with solid-state circuitry and a dry contact output. Current sensing switches shall consist of a solid state current sensing circuit, adjustable trip point, solid state switch, SPDT relay and an LED indicating the on or off status. A conductor of the load shall be passed through the window of the device. It shall accept overcurrent up to twice its trip into range.

1.11 ELECTRICAL CONTROL POWER AND LOW VOLTAGE WIRING

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A. Provide interlock wiring between supply and return fans, electrical wiring for relays (including power feed) for temperature and pressure indication. Provide interlock wiring between refrigeration machines, pumps and condensing equipment as required for the specified sequence of operation and the refrigeration system integral controller(s). Do not provide interlock wiring if a dedicated digital output has been specified for the equipment or the sequence of operation requires independent start/stop.

B. Provide power wiring, conduit and connections for low temperature thermostats, high temperature thermostats, alarms, flow switches, actuating devices for temperature, humidity, pressure and flow indication, point resets and user disconnect switches for electric heating appliances controlled by this Section.

C. Provide all other wiring required for the complete operation of the specified systems.

D. Controls Network Communication Requirements

1. Wired network communication shall be via channels consisting of a 24 AWG twisted pair installed in a 3/4” EMT.

2. In all communication conduits, provide one spare twisted pair to be installed, tagged and labeled at each end.

3. Telephone lines, where required as a remote communication source, shall utilize voice band, non-switched, private line channels consistent with Bell Systems Technical Reference Pub. 41001 and shall be four-wire unconditioned 3002 channels. The modems shall have 25 pin EIA connectors and RS-232C interface.

4. Communication conduits shall not be installed closer than six feet from high power transformers or run parallel within six feet of electrical high power cables. Care shall be taken to route the cable as far from interference generating devices as possible.

5. All shields shall be ground (earth ground) at one point only, to eliminate ground loops.

6. There shall be no power wiring, in excess of 30 VAC rms, run in conduit with communications wiring. In cases where signal wiring is run in conduit with communication wiring, all communication wiring and signal wiring shall be run using separate twisted shielded pairs (24awg) with the shields grounded in accordance with the manufacturer’s wiring practice.

E. Power & Communication Wiring Transient Protection

1. The control manufacturer’s shall submit catalog data sheets providing evidence that all CONTROLS products offered by the manufacturer are tested and comply with the standard for Transient Surge withstand capabilities for electrical devices ANSI C62.41, IEEE-587- 1980, Categories A and B. Such testing shall have included power and communication trunk wiring. Compliance with IEEE-587 shall imply conformance with IEEE-472 transient standards based on the stated position of ANSI and IEEE regarding applicability of the rated standards.

2. Communications trunk wiring shall be protected with a transient surge protection device providing the minimal protection specifications of the General semiconductor, Model #422E device.

3. The communications circuitry, input/output circuitry, and CU’s, shall provide protection

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against a 1000 volt, 3 amp transient signal, directly applied to the communication or input/output terminations. The manufacturer’s catalog data sheet shall provide evidence of conformance with this requirement. Systems not complying with this requirement shall provide equivalent protection external to the ATCS controller. Protection shall be provided for the individual communications and input/output terminations for each ATCS controller.

Submittal documentation shall clearly define how this requirement will be met and how the external protection will not affect the performance of the controllers.

F. Input/Output Control Wiring

1. Control wiring shall be sized to accommodate the voltage drop associated with the distance between the control device and the controller. Minimum size shall be as specified herein.

2. RTD wiring shall be three-wire or four-wire twisted, shielded, minimum number 22 gauge.

3. Other analog inputs shall be a minimum of number 22 gauge, twisted, shielded.

4. Binary control function wiring shall be a minimum of number 18 gauge.

5. Analog output control functions shall be a minimum of number 22 gauge, twisted, shielded.

6. Binary input wiring shall be a minimum of number 22 gauge.

7. Thermistors shall be equipped with the manufacturer’s calibrated lead wiring.

8. 120V control wiring shall be #14 THHN in 3/4” conduit. Provide 4 or 20% fill extra wire in each conduit.

G. Splices

1. Splices in shielded cables shall consist of terminations and the use of shielded cable couplers that maintain the integrity of the shielding. Terminations shall be in accessible locations. Cables shall be harnessed with cable ties as specified herein.

H. Conduit and Fittings

1. Conduit for Control Wiring, Control Cable and Transmission Cable: Electrical metallic tubing (EMT) with compression fittings, cold rolled steel, zinc coated or zinc-coated rigid steel with threaded connections.

2. Outlet Boxes (Dry Location): Sheradized or galvanized drawn steel suited to each application, in general, four inches square or octagon with suitable raised cover.

3. Outlet Boxes (Exposed to Weather): Threaded hub cast aluminum or iron boxes with gasket device plate.

4. Pull and Junction Boxes: Size according to number, size, and position of entering raceway as required by National Electrical Codes. Enclosure type shall be suited to location.

I. Relays

1. Relays other than those associated with digital output cards shall be general purpose, enclosed plug-in type with 8-pin octal plug and protected by a heat and shock resistant duct cover. Number of contacts and operational function shall be as required.

2. Solid State Relays (SSR): Input/output isolation shall be greater than 10 E9 ohms with a breakdown voltage of 1500V root mean square or greater at 60 Hz. The contact life shall

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be 10 x 10 E6 operations or greater. The ambient temperature range of SSRs shall be -20 to +140F. Input impedance shall not be less than 500 ohms. Relays shall be rated for the application. Operating and release time shall be for 100 milliseconds or less. Transient suppression shall be provided as an integral part of the relay.

3. Contactors: Contactors shall be of the single coil, electrically operated, mechanically held type. Positive locking shall be obtained without the use of hooks, latches, or semipermanent magnets. Contactor shall be double-break, silver-to-silver type protected by arcing contacts. The number of contacts and rating shall be selected for the application.

Operating and release times shall be 100 milliseconds or less. Contactors shall be equipped with coil transient suppression devices.

PART 2 - PRODUCTS AND MATERIALS

2.1 GENERAL PRODUCT DESCRIPTION

A. The Controls System shall consist of the following:

1. Standalone Application Specific Controllers (ASC's)

B. The failure of any single component shall not interrupt the execution of control strategies at other operational devices.

2.2 SYSTEM SOFTWARE FEATURES

A. General:

1. All necessary software to form a complete operating system, as described in this specification, shall be provided.

2. The software programs specified in this section shall be provided as an integral part of the stand-alone controller, and shall not be dependent upon any higher level computer for execution.

B. Control Software Description:

1. Equipment Cycling Protection: Control software shall include a provision for limiting the number of times each piece of equipment may be cycled within any one-hour period.

2. Heavy Equipment Delays: The system shall provide protection against excessive demand situations during start-up periods by automatically introducing time delays between successive start commands to heavy electrical loads.

C. Energy Management Applications: Stand-alone controllers shall have the ability to perform any or all of the following energy management routines:

1. Time of Day Scheduling

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2. Calendar Based Scheduling

3. Holiday Scheduling

4. Load Rolling

5. Heating/Cooling Interlock

D. Programs: All programs shall be executed automatically without the need for operator intervention, and shall be flexible enough to allow user customization. Programs shall be applied to building equipment described in the "Execution" portion of this specification.

E. Programming Capability: Stand-alone controllers shall be able to execute configured processes defined by the user to automatically perform calculations and control routines.

1. Process Inputs and Variables: It shall be possible to use any of the following in a configured process:

a. Any system-measured point data or status

b. Any calculated data

c. Any results from other processes

d. Boolean logic operators (and, or)

2. Process Triggers: Configured processes may be triggered based on any combination of the following:

a. Time of day

b. Calendar Date

c. Other processes

d. Events (e.g., point alarms)

F. Alarm Management: Alarm management shall be provided to monitor, buffer, and direct alarm reports to operator devices and memory files. Each stand-alone controller shall perform distributed, independent alarm analysis and filtering to minimize operator interruptions due to non-critical alarms, minimize network traffic, and prevent alarms from being lost. At no time shall the stand-alone controller’s ability to report alarms be affected by either operator activity at the local I/O device, or communications with other ASC's on the network.

1. Point Change Report Description: All alarm or point change reports shall include the points' English language description, and the time and date of occurrence.

2. Prioritizing: The user shall be able to define the specific system reaction for each point.

Alarms shall be prioritized to minimize nuisance reporting and to speed operator response to critical alarms. A minimum of three priority levels shall be provided. Users shall have the ability to manually inhibit alarm reporting for each point. The user shall also be able to define conditions under which point changes need to be acknowledged by an operator, and/or logged for analysis at a later date.

3. Report Routing: Alarm reports and messages shall be directed to an operator device.

4. Alarm Messages: In addition to the point's descriptor and the time and date, the user shall be able to print, display or store a 60-character alarm message to more fully describe the alarm condition or direct operator response. Each stand-alone controller shall be capable of storing a library of at least 100 Alarm Messages. Each message may be assignable to any number of points in the panel.

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2.3 APPLICATION SPECIFIC CONTROLLERS - HVAC APPLICATIONS

A. Each ASC shall operate as a standalone controller capable of performing its specified control responsibilities independently of other controllers in the network. Each ASC shall be a microprocessor-based, multi-tasking, real-time digital control processor.

B. Each ASC shall have sufficient memory to support its own operating system and data bases including:

1. Control Processes

2. Energy Management Applications

3. Operator I/O (Portable Service Terminal)

C. The operator interface to any ASC point data or programs shall be through the Digital Panel or portable operator's terminal connected to any ASC on the network.

D. ASC's shall directly support the temporary use of a portable service terminal that can be connected to the ASC via zone temperature or directly at the controller. The capabilities of the portable service terminal that can be connected to the ASC via zone temperature or directly at the controller. The capabilities of the portable service terminal shall include, but not be limited to, the following:

1. Display temperatures

2. Display status

3. Display setpoints

4. Display control parameters

5. Override binary output control

6. Override analog setpoints

7. Modification of gain and offset constants

E. Powerfail Protection: All system setpoints, proportional bands, control algorithms, and any other programmable parameters shall be stored such that a power failure of any duration does not necessitate reprogramming the ASC.

PART 3 - EXECUTION

3.1 STARTUP AND DEMONSTRATION

A. Control system shall be set up and checked by factory trained competent technicians skilled in the setting and adjustment of the control system equipment used in this project. This technician is to be experienced in the type of HVAC systems associated with this project.

B. At the completion of the startup, this contractor shall demonstrate the sequence of operations for each system to the Architect or his representative.

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3.2 TRAINING

A. General: At a time mutually agreed upon between the Contracting Officer’s Representative (C.O.R.) and Contractor, provide the services of a factory trained and authorized representative to train C.O.R. for a minimum of eight hours on the operation and maintenance of the equipment provided under this section.

B. Content: Training shall include but not be limited to:

1. Overview of the system and/or equipment as it relates to the facility as a whole.

2. Operation and maintenance procedures and schedules related to startup and shutdown, troubleshooting, servicing, preventive maintenance and appropriate operator intervention.

3. Review data included in the operation and maintenance manuals. Refer to Division 1

Section "Operation and Maintenance Data."

C. Certification: Contractor shall submit to the Engineer a certification letter stating that the C.O.R. has been trained as specified herein. Letter shall include date, time, attendees and subject of training. The certification letter shall be signed by the Contractor and the C.O.R.

indicating agreement that the training has been provided.

D. Schedule: Schedule training with Owner with at least 7 days' advance notice.

END OF SECTION 230923

2. All subcontractors utilized by the Controls Contractor shall have a minimum of five years experience within their appropriate trades.

d. Provide a disconnect switch for each current transformer.