15900 Add 2.doc

Interior Renovations at U.S. Courthouse

GSA Number: GS-03P-98-CDC-0019

Pittsburgh, Pennsylvania

SECTION 15900

HVAC INSTRUMENTATION AND CONTROLS

PART 1 - GENERAL

1.1 REFERENCE

A. All applicable requirements of other portions of the Contract Documents apply to the Work of this Section, including, but not limited to, Division 1, General Requirements.

B. Related Sections include the following: Refer to specification 15910 Commissioning for additional requirements.

1.2 DEFINITIONS

A. BAS: Building automation system.

B. BASC: Building automation system contractor.

C. GUI: Graphical user interface

1.3 SUMMARY

A. The new work will be connected to the existing “Johnson Controls” BAS system installed in a previous project.

B. This contractor shall provide new devices to connect to the existing BAS control workstation. This contractor shall include all costs to program system graphics and point interface.

C. The BAS shall be configured to provide all control, sequences of operation, and systems monitoring as required by these specifications and by the drawings. Provide all required devices, sensors, hardware, software, wiring, controllers, etc. including any required and not specifically addressed in this specification but required for system functionality. It shall be the responsibility of the BASC to provide a complete and functioning system.

D. The design intent of the BAS is to utilize LON communication at the controller level and BACnet at the front end /operator workstation level.

E. All building automation wiring shall be provided for a complete and operable system. All wiring shall be installed in accordance with NEC and all local Codes. Run control wiring parallel and perpendicular to building lines; avoid diagonal runs. Division 16 will provide 120 V power source to junction boxes as indicated on the electrical drawings. Control Contractor shall furnish and install all additional 120 power to system as required. Contractor shall provide 24 volt step down control transformers and wiring for control devices as required.

F. All control panels, routers, valves actuators and wiring shall be labeled. Control wire labels shall identify:

1. Associated Equipment (Air Handling Unit)

2. Associated Equipment Tag (AHU-7)

3. Associated Control Device (Filter differential pressure transmitter).

4. Type of Control Point

a. Analog Input (AI)

b. Analog Output (AO)

c. Binary Input (BI)

d. Binary Output (BO)

G. This specification lists many options and features that will provide the Owner future expansion and flexibility, therefore all listed options and features must be available from the proposed control contractor at the time of bid.

H. The BAS shall provide the appropriate quantity of legal copies of all software tools, configuration tools, management tools, and utilities used during system commissioning and installation. All tools shall be generally available in the market. No closed and/or unavailable tools will be permitted.

I. All necessary documentation, configuration information, software configuration tools, programs, drivers, shall be licensed and otherwise remain with the Owner such that the Owner or his agents are able to perform repair, replacement, upgrades and expansions of the system without subsequence or future dependence on the BASC.

J. Any work that will cause the shut down or interfere with the proper operation of HVAC equipment or electrical systems must be performed after normal business hours and must be coordinated in advance with the owner

K. BASC is responsible for all configuration and programming to provide monitoring and control points for each node identified on the Control Architecture Diagram. The control sequences are described in the sequence of operation on the drawings and/or in the equipment specifications. Refer to the following Division 15 sections for manufacturer supplied equipment controllers:

1. Section 15056: “Variable Frequency Controllers”.

1.4 SCOPE

A. See section Summary Section 01100.

1.5 SYSTEM PERFORMANCE

A. Comply with the following performance requirements:

1. Graphic Display: Display graphic with minimum 20 dynamic points with current data within 10 seconds.

2. Graphic Refresh: Update graphic with minimum 20 dynamic points with current data within 8 seconds.

3. Object Command: Reaction time of less than two seconds between operator command of a binary object and device reaction.

4. Object Scan: Transmit change of state and change of analog values to control units or workstation within six seconds.

5. Alarm Response Time: Annunciate alarm at workstation within 45 seconds. Multiple workstations must receive alarms within five seconds of each other.

6. Program Execution Frequency: Run capability of applications as often as five seconds, but selected consistent with mechanical process under control.

7. Performance: Programmable controllers shall execute DDC PID control loops, and scan and update process values and outputs at least once per second.

8. Reporting Accuracy and Stability of Control: Report values and maintain measured variables within tolerances as follows:

1.6 SUBMITTALS

Retain two paragraphs and associated subparagraphs below for general submittal requirements for controls systems.

A. Product Data: Include manufacturer's technical literature for each control device. Indicate dimensions, capacities, performance characteristics, electrical characteristics, finishes for materials, and installation and startup instructions for each type of product indicated.

Retain three subparagraphs below for DDC systems.

1. DDC System Hardware: Bill of materials of equipment indicating quantity, manufacturer, and model number. Include technical data for operator workstation equipment, interface equipment, control units, transducers/transmitters, sensors, actuators, valves, relays/switches, control panels, and operator interface equipment.

2. Control System Software: Include technical data for operating system software, operator interface, color graphics, and other third-party applications.

3. Controlled Systems: Instrumentation list with element name, type of device, manufacturer, model number, and product data. Include written description of sequence of operation including schematic diagram.

B. Shop Drawings: Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

1. Bill of materials of equipment indicating quantity, manufacturer, and model number.

2. Schematic flow diagrams showing fans, pumps, coils, dampers, valves, and control devices.

3. Wiring Diagrams: Power, signal, and control wiring.

4. Details of control panel faces, including controls, instruments, and labeling.

Retain first subparagraph below if "Sequence of Operation" Article is included in this Section or on Drawings; delete if Division 15 Section "Sequence of Operation" is included in the Project Manual.

5. Written description of sequence of operation.

6. Schedule of dampers including size, leakage, and flow characteristics.

7. Schedule of valves including flow characteristics.

Retain three subparagraphs and associated subparagraphs below for DDC systems.

8. DDC System Hardware:

a. Wiring diagrams for control units with termination numbers.

b. Schematic diagrams and floor plans for field sensors and control hardware.

c. Schematic diagrams for control, communication, and power wiring, showing trunk data conductors and wiring between operator workstation and control unit locations.

9. Control System Software: List of color graphics indicating monitored systems, data (connected and calculated) point addresses, output schedule, and operator notations.

10. Controlled Systems:

a. Schematic diagrams of each controlled system with control points labeled and control elements graphically shown, with wiring.

b. Scaled drawings showing mounting, routing, and wiring of elements including bases and special construction.

c. Written description of sequence of operation including schematic diagram.

d. Points list.

C. Software and Firmware Operational Documentation: Include the following:

1. Software operating and upgrade manuals.

2. Program Software Backup: On a magnetic media or compact disc, complete with data files.

3. Device address list.

4. Printout of software application and graphic screens.

5. Software license required by and installed for DDC workstations and control systems.

D. Software Upgrade Kit: For Owner to use in modifying software to suit future systems revisions or monitoring and control revisions.

Coordinate paragraph below with qualification requirements in Division 1 Section "Quality Requirements" and as supplemented in "Quality Assurance" Article.

E. Qualification Data: For installer and manufacturer.

Retain first paragraph below if Contractor is responsible for field quality-control testing.

F. Field quality-control test reports.

G. Operation and Maintenance Data: For HVAC instrumentation and control system 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. Maintenance instructions and lists of spare parts for each type of control device and compressed-air station.

2. Interconnection wiring diagrams with identified and numbered system components and devices.

3. Keyboard illustrations and step-by-step procedures indexed for each operator function.

4. Inspection period, cleaning methods, cleaning materials recommended, and calibration tolerances.

5. Calibration records and list of set points.

1.7 QUALITY ASSURANCE

Delete first paragraph below if not required or not available at Project location.

A. Installer Qualifications: Automatic control system manufacturer's authorized representative who is trained and approved for installation of system components required for this Project.

B. 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.

1.8 DELIVERY, STORAGE, AND HANDLING

Retain first paragraph below if factory installation of controls is required.

A. Factory-Mounted Components: Where control devices specified in this Section are indicated to be factory mounted on equipment, arrange for shipping of control devices to equipment manufacturer.

B. System Software: Update to latest version of software at Project completion.

1.9 COORDINATION

A. Coordinate location of thermostats, humidistats, and other control sensors with plans before installation.

1.10 WARRANTY

A. Provide all services, materials and equipment necessary for the successful operation of the entire control system for a period of one year after the date of Certificate of Contract Completion and Owner Operating Personnel training or Acceptance of Installation.

B. The adjustment, required testing, and repair of the system includes all computer equipment, software, transmission, equipment and all sensors and control devices.

C. The contractor shall have the ability to provide on-line support services. On-line support services shall allow the local subcontractor to dial out over telephone lines to monitor and control the Building’s building system. This remote connection to the Building shall be within 2 hours of the time that the problem is reported. This coverage shall be extended to include normal business hours, after business hours, weekends and holidays.

D. If the problem cannot be resolved on-line by the local office, the national office of the building automation system manufacturer shall have the same capabilities for remote connection to the Building. If the problem cannot be resolved with on-line support services, the BAS subcontractor shall dispatch the appropriate personnel to the job site to resolve the problem within 4 hours of the time that the problem is reported.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection:

1. Manufacturers: Subject to compliance with requirements, provide products by one of the manufacturers specified.

2.2 CONTROL SYSTEM

A. Manufacturers:

1. All components shall be compatible and match existing building management control manufacturer.

2.3 OPERATION ENVIRONMENT REQUIREMENTS

A. All Products shall be rated for continuous operation under the following conditions:

1. Pressure: Pressure conditions normally encountered in the installed location.

B. Vibration: Vibration conditions normally encountered in the installed location.

C. Temperature:

1. Products installed indoors in conditioned spaces: Ambient temperatures in the range of 32°F to 112°F.

2. Products installed outdoors or in unconditioned indoor spaces: Ambient temperatures in the range of -20°F to 150°F.

D. Humidity: 10% to 95% relative humidity, noncondensing and humidity.

2.4 UNITARY CONTROLLERS

A. Unitized, capable of stand-alone operation with sufficient memory to support its operating system, database, and programming requirements, and with sufficient I/O capacity for the application.

1. Configuration: Local keypad and display; diagnostic LEDs for power, communication, and processor; wiring termination to terminal strip or card connected with ribbon cable; memory with bios; and 72-hour battery backup.

2. Operating System: Manage I/O communication to allow distributed controllers to share real and virtual object information and allow central monitoring and alarms. Perform automatic system diagnostics; monitor system and report failures.

3. Enclosure: Dustproof rated for operation at 32 to 120 deg F (0 to 50 deg C).

2.5 GRAPHICAL USER INTERFACE

A. Basic Interface Description

1. New component shall be added to display and alarm control sequence.

2. Operator workstation interface software shall minimize operator training through the use of English language prompting, 30-character English language point identification, on-line help, and industry standard PC application software. Interface software shall simultaneously communicate with up to 4 Building Level Networks and share data between any of the 4 networks. The software shall provide, as a minimum, the following functionality:

a. Real-time graphical viewing and control of environment

b. Scheduling and override of building operations

c. Collection and analysis of historical data

d. Point database editing, storage and downloading of controller databases.

e. Alarm reporting, routing, messaging, and acknowledgment

f. Display dynamic data trend plot.

1) Must be able to run multiple plots simultaneously.

2) Each plot must be capable of supporting 10 pts/plot minimum.

3) Must be able to command points directly off dynamic trend plot application.

4) Definition and construction of dynamic color graphic displays.

5) Program editing

g. Transfer trend data to 3rd party software

h. Scheduling reports

i. Operator Activity Log

B. System Configuration & Definition

1. Network wide control strategies shall not be restricted to a single DDC Controller or HVAC Mechanical Equipment controller, but shall be able to include data from any and all other network panels to allow the development of Global control strategies.

2. Provide automatic backup and restore of all DDC controller and HVAC Mechanical Equipment controller databases on the workstation hard disk. In addition, all database changes shall be performed while the workstation is on-line without disrupting other system operations. Changes shall be automatically recorded and downloaded to the appropriate DDC Controller or HVAC Mechanical Equipment Controller. Changes made at the DDC Controllers or HVAC Mechanical Equipment Controllers shall be automatically uploaded to the workstation, ensuring system continuity.

3. System configuration, programming, editing, graphics generation shall be performed on-line. If programming and system back up must be done with the PC workstation off-line, the BAS contractor shall provide at least 2 operator workstations.

C. Alarm Management.

1. Alarm Routing shall allow the user to send alarm notification to selected printers or PC location based on time of day, alarm severity, or point type.

2. Alarm Notification shall be provided via two alarm icons, to distinguish between routine, maintenance type alarms and critical alarms. These alarm icons shall be displayed when user is working in other Windows programs. The BAS alarm display screen shall be displayed when the user clicks on the alarm icon.

3. Alarm Display shall list the alarms with highest priority at the top of the display. The alarm display shall provide selector buttons for display of the associated point graphic and message. The alarm display shall provide a mechanism for the operator to sort alarms.

4. Alarm messages shall be customizable for each point to display detailed instructions to the user regarding actions to take in the event of an alarm.

D. Automatic Alarm Paging

1. Alarm paging shall be The integrated alarm paging system and system software shall adhere to the following:

a. Alarm paging shall be accomplished by a text message via some or all of the following methods:

1) Email.

2) Pager.

3) Cell phone.

b. Enhanced Alarming – Receiving enhanced text alarm messages from the BAS network and send to one or multiple alphanumeric pagers a 16 character English language text message.

c. Alarm Segregation – System alarms to be sent to pagers based on categories and parameters such as: Type of alarm - HVAC (fans, pumps, temperature), MAINTENANCE (filters, runtime), LIFE SAFETY (Fire & smoke alarms), SECURITY (system security, intrusion & lighting override) CRITICAL (emergency generators & power distribution alarms. The paging system software shall perform alarm segregated routing, by type of alarm, to the appropriate personnel responding to the alarm condition.

d. System Scheduler – The system scheduler shall have the flexibility to accommodate vacations, holidays, equipment shutdowns and personnel changes. All schedules shall have the ability to be edited, viewed and printed.

e. Custom Time Programming – System time programming such as: Shift Paging, Time of Day Paging, paging only while on duty and weekend & Holiday paging.

f. Auto Archiving – Paging system software shall auto archive and have the ability to recall then view and/or print a report.

2.6 Field Devices

A. Furnish and install the following field devices, all devices shall be approved for installation in the Pittsburgh Federal Court house and shall be suitable for the environmental conditions where they are to be installed.

B. Temperature Sensors - with accuracy of + 0.5(F @ 77(F.

1. Duct temperature sensors - Precision platinum RTD element or thermister type. All duct cross sections greater than 10 sq. ft shall have serpentine averaging element to adequately average stratified air temperatures.

2. Low Temperature Detection Thermostat - Provide low-temperature protection thermostats of manual-reset type, with sensing elements 20'-0" in length downstream of hot water coil and upstream of chilled water coil. Provide thermostat designed to operate in response to coldest 1'-0" length of sensing element, regardless of temperature at other parts of element. Support element properly to cover entire duct width. Provide separate thermostats for each 25 sq. ft of coil face area or fraction thereof.

C. Humidity Sensors: Fully interchangeable calibration free element. Sensors shall be temperature compensated and have a minimum long term stability of 1% per year.

1. Accuracy: + 2% RH @ 77(F from 0 to 90% RH and (3% from 90 to 100% RH, including hystersis, non-linearity and repeatability.

2. Range: 0% to 100% RH.

D. Static Pressure Transmitter: Nondirectional sensor with suitable range for expected input, and temperature compensated.

1. Range: Field selectable, suitable for application.

2. Accuracy: Accuracy: ( 1% full scale, combined linearity, hysteresis and repeatability.

3. Output: Field selectable from 0-5v, 0-10v and 4-20mA.

E. Air differential pressure transmitter.

1. Range: Field selectable, suitable for application.

2. Accuracy ( 1% full scale combined linearity, hysteresis and repeatability.

3. Output: Field selectable from 0-5v, 0-10v and 4-20mA.

F. Water differential pressure transmitter.

1. Range: Field selectable, suitable for application.

2. Accuracy: ( 1% full scale, combined linearity, hysteresis and repeatability.

3. Output: Field selectable from 0-5v, 0-10v and 4-20mA.

G. Current Sensing Switches - Variable frequency drive (VFD): Monitors positive status of variable speed motors with self-adjusting trip set point. Current sensing switches shall automatically compensate for effects of frequency and amperage changes associated with VFDs.

1. Amperage Range: 3.5-135 Amps at all frequency levels.

2. Sensor Power: Induced.

3. Output: Digital switch.

4. Frequency Range: 34 to 75 Hz belt loss indication and 5 to 34 Hz on/off status.

5. Temperature Range: 5°F to 140°F.

6. Humidity Range: 0% to 95% non-condensing.

7. Trip Set Point: Self-calibrating.

H. Current Sensing Switches - Constant Volume (CV): Monitors positive status of constant speed motors with adjustable trip set point.

1. Sensor Power: Induced.

2. Output: Digital switch.

3. Temperature Range: 5°F to 140°F.

4. Humidity Range: 0% to95% non-condensing.

5. Trip Set Point: Adjustable from 1-135 Amps.

6. Hysteresis: 10%.

I. 24 Volt Manual Switches: Provide 24 volt switches indicated on the mechanical plans. 24 volt switches shall be rocker type and shall be wall mounted in a steel outlet box with metal wall plate.

J. Pressure Transmitters: Direct acting for gas, liquid, or steam service; range suitable for system; proportional output 4 to 20 mA.

K. Carbon Dioxide Sensors.

1. Range: 0-2,000 ppm.

2. Accuracy: (1% FS + 1.5% of reading, including non-linearity at 77°F.

3. Repeatability: (1% FS, temperature dependence of output shall be 0.05% FS/(F.

4. Long term stability shall be <5% FS for 5 years.

5. Output: Field selectable from 0-5v, 0-10v and 4-20mA.

L. Carbon Monoxide Sensors.

1. Range: 0-250 ppm.

2. Accuracy: (1 ppm.

3. Repeatability: (3% of reading.

4. Long term signal drift shall be <0.4% FS per month.

5. Sensor: Replaceable with a minimum life expectancy of 5 years.

6. Output: Field selectable from 4-20mA.

M. Airflow/Temperature Measurement

1. General Requirements

a. The airflow measuring station (AFMS) will be located as indicated on the diagrams. The stations shall be capable of monitoring air flow rates through the entire operating range of their associated equipment. The AFMS’s shall incorporate either a thermal dispersion technology or vortex shedding technology. Each reference to the AFMS total accuracy shall refer to the entire instrument, including the primary flow elements and associated transmitters. The equipment shall be factory tested and calibrated prior to shipment. Manufacturer shall provide certification of factory calibration.

b. The unit shall operate on 24 VAC and shall output a 4-20mA signal proportional to the air flow rate. The transmitter shall be capable of being configured in the field and shall have a resident LCD display.

c. The transmitters will be suitable for installation in indoor equipment room environments and in clean HVAC ducts with breathable air. The power supply and the analog outputs shall be fused. The transmitter shall be capable of being operated in a 30( F to 120( F environment.

2. Application Requirements

a. Each air flow station application will be examined and the AFMS’s will be applied such that the minimum installed total accuracy identified below is achieved. This range shall apply to the entire operating range of the equipment associated with the AFMS. These conditions shall be met when the AFMS’s are applied according to the manufacturer’s guidelines. This application will be done based on actual field conditions (through coordination drawings) and not bid documents. Any station not complying with the manufacturer’s installation guidelines will be so noted in the submittal process. The submittals for the AFMS’s will include tag, range, output, size, product accuracy, installed system accuracy, sensor density, installation type, and all other relevant data to access the AFMS’s and their performance.

3. Duct & Plenum Mounted Sensor Probes:

a. Probe Performance Requirements: The sensor accuracy for airflow shall be at least ±2% of Reading over the sensor probe operating ranges. The installed total accuracy for airflow shall be better than ±5% of Reading over the sensor probe operating ranges when installed in accordance with manufacturers’ guidelines.

1) Probe Sensor Density: The number of independent sensing points shall be as indicated below.

2) Probe Operating Ranges:

a) Airflow: 0 to 5,000 FPM [0 to 25.4 m/s]

b) Temperature: -20° F to +160° F [-28.9° C to 71.1° C]

c) Relative Humidity: 0 to 99% (non-condensing)

4. Fan Inlet Velocity Sensors: Sensors shall be constructed with stainless steel sensor bodies, stainless steel mounting brackets and with adjustable cadmium-plated mounting rods.

a. Fan Inlet Performance Requirements: The individual sensor accuracy for airflow shall be at least ±3% of Reading over the sensor probe operating ranges. The installed total accuracy for airflow shall be better than ±6% of Reading over the sensor probe operating ranges when installed in accordance with manufacturers’ guidelines. Fan Inlet Sensor Density: Probes shall be provided with an adjustable mounting, a minimum of two probes per inlet, for single or dual inlet fans.

b. Installation Requirements: When the fan inlet probes are installed, the contractor shall record the precise measurement of the diameter of the fan bell inlet in the plane of the probes. This measurement will be used for the area calculation and hence for the volumetric flow rate calculation. This measurement and subsequent calculations shall be included in the as built documentation.

1) Probe Sensor Density: The number of independent sensing points shall be as indicated below.

2) Fan Inlet Sensor Operating Ranges:

a) Airflow: 0 to 9,000 FPM [0 to 50.8 m/s]

b) Temperature: -20° F to +160° F [-28.9° C to +71.1° C]

c) Relative Humidity: 0 to 99% (non-condensing)

5. Dynamic Pressure “Bleed Airflow” Sensors: Each sensing point shall independently measure bleed air flow rates and direction, or dynamic differential pressure, plus temperature. Sensor shall be constructed of an engineered thermoplastic with ½ NPT female threads on the inlet and outlet of the housing.

a. DP Sensor Performance Requirements: The installed total accuracy for airflow shall be better than ±2% of reading, and ±4% of reading for pressure, over the sensor operating range when installed in accordance with manufacturer’s guidelines.

b. DP Sensor Operating Ranges:

1) Bleed Airflow: -2,000 FPM to 2,000 FPM [-10.2 m/s to +10.2 m/s], or Differential Pressure: -0.25”WG to +0.25”WG [-62.1 Pa to +62.1.Pa.

2) Temperature: -20° F to +160° F [-28.9° C to 71.1° C]

3) Relative Humidity: 0 to 99% (non-condensing)

N. Dampers - Provide automatic control dampers as indicated. The frame shall be constructed of extruded aluminum and not less than 4” wide and .080” thickness. The blades shall be extruded aluminum. Linkage hardware shall be installed in the frame side and be constructed of aluminum and corrosion resistant zinc plated steel. Bearings are to be composed of a celcon inner bearing and polycarbonate outer bearing with a 20 year guarantee. The dampers will be designed for operation between -40( F and 212( F. Dampers shall be available as either opposed blade or parallel blade. They shall be built with either “flanged to duct” or “installed in duct” type frames as required by the application. Blade gaskets shall be extruded EPDM ( or NASA Aerospace Silicone) and frame seals shall be extruded TPE ( or NASA Aerospace Silicone).

1. Thermally Broken Blade Dampers.

a. Dampers in outdoor air and relief air applications shall utilize thermal break technology.

b. The leakage of these dampers shall not exceed 6.7 CFM per square foot against 4” differential pressure at -40( F.

c. Standard air leakage shall be certified under AMCA certified ratings program and shall not exceed 4.12 CFM per square foot against 4” differential static pressure on a 48” x 48” damper section.

d. Seals on thermally broken blade dampers shall be silicone. The dampers shall be TAMCO 9000 SC, or Ruskin CDTI-50.

2. Non Thermally Broken Blade Dampers.

a. Control Dampers other than those applications exposed to outdoor ambient conditions shall be as described above with a leakage rate of not greater than 10.5 CFM per square foot against a 4” differential static pressure on a 48” x 48” section. This standard air leakage data shall be certified under the AMCA certified ratings program. These dampers shall be TAMCO 1000 Series, or Ruskin CD50.

3. Applications.

a. Dampers shall be designed for a maximum section size of 25 square feet or less. Jackshafting of multiple sections will incorporate the use of 1” regreasable bronze bearing pillow blocks and 1” solid steel shaft for horizontal jackshafting and 1” vertical shaft for vertical jackshafting. Damper jumpers are acceptable if approved for use by the manufacturer in a given application. Each damper section shall have a unique drive pin that is hexagonal in cross section for positive contact with actuator and flat on flat press fit with blade.

b. Provide low leakage applications for all outside air applications or as indicated, provide dampers with a leakage rate of less than 10 cfm/sq.ft. of damper area, at differential pressure of 4 inches w.g. when damper is being held by torque of 50 inch-pounds.

c. Electric damper actuators, terminal equipment - 24 volt electronic rotary actuator with minimum 35 lb-in torque rating. Running time for 90-degree rotation shall be 90 seconds or faster independent of load. Actuator shall maintain last position on power failure unless fail-safe requirement is noted in equipment sequence of operation.

O. Damper End Switches.

1. Hermetically sealed switch with a trip level and over-travel mechanism.

2. Switch enclosure shall be suitable for mounting on damper/duct exterior and shall permit setting the position of the trip lever that actuates the switch. Trip lever shall be aligned with the damper blade.

P. Control Valve Actuator Motors:

1. Size to operate with sufficient reserve power to provide smooth modulating action or two-position action.

2. Permanent Split-Capacitor or Shaded-Pole Type: Gear trains completely oil immersed and sealed. Equip spring-return motors with integral spiral-spring mechanism in housings designed for easy removal for service or adjustment of limit switches, auxiliary switches, or feedback potentiometer.

3. Nonspring-Return Motors for Valves Larger Than NPS 2-1/2 (DN 65): Size for running torque of 150 in. x lbf (16.9 N x m) and breakaway torque of 300 in. x lbf (33.9 N x m).

4. Spring-Return Motors for Valves Larger Than NPS 2-1/2 (DN 65): Size for running and breakaway torque of 150 in. x lbf (16.9 N x m).

5. Nonspring-Return Motors for Dampers Larger Than 25 Sq. Ft. (2.3 sq. m): Size for running torque of 150 in. x lbf (16.9 N x m) and breakaway torque of 300 in. x lbf (33.9 N x m).

6. Spring-Return Motors for Dampers Larger Than 25 Sq. Ft. (2.3 sq. m): Size for running and breakaway torque of 150 in. x lbf (16.9 N x m).

Q. Control Valve Electronic Actuators: Direct-coupled type designed for minimum 60,000 full-stroke cycles at rated torque.

1. Size for torque required for valve close off at maximum pump differential pressure or for system static head, whichever is greater.

2. Coupling: V-bolt and V-shaped, toothed cradle.

3. Overload Protection: Electronic overload or digital rotation-sensing circuitry.

4. Fail-Safe Operation: Mechanical, spring-return mechanism. Provide external, manual gear release on nonspring-return actuators.

5. Power Requirements (Two-Position Spring Return): 120 V ac.

6. Power Requirements (Modulating): 24 V ac for 3 inch and smaller and 120 V ac for 4 inch and larger.

7. Proportional Signal: 2- to 10-V dc or 4 to 20 mA, and 2- to 10-V dc position feedback signal.

8. Temperature Rating: Minus 22 to plus 122 deg F.

9. Run Time: 120 seconds.

10. Actuator Housing: Molded or die-cast zinc or aluminum.

R. Control Valves.

1. Control Valves: Factory fabricated, of type, body material, and pressure class based on maximum pressure and temperature rating of piping system, unless otherwise indicated.

2. Hydronic system globe valves shall have the following characteristics:

a. NPS 2 (DN 50) and Smaller: Class 250 bronze body, bronze trim, rising stem, renewable composition disc, and screwed ends with backseating capacity repackable under pressure.

b. NPS 2-1/2 (DN 65) and Larger: Class 125 iron body, bronze trim, rising stem, plug-type disc, flanged ends, and renewable seat and disc.

1) Internal Construction: Replaceable plugs and stainless-steel or brass seats.

c. Single-Seated Valves: Cage trim provides seating and guiding surfaces for plug on top and bottom.

d. Double-Seated Valves: Balanced plug; cage trim provides seating and guiding surfaces for plugs on top and bottom.

e. Sizing: 2-psig (21-kPa) for heating hot water and 5-psig (35-kPa) for chilled water at design flow rate unless noted otherwise on drawings.

f. Flow Characteristics:

1) Two-way valves, 2-inch and smaller shall be equal percentage, pressure independent characterized two-way control valves.

2) Two-way valves, 2 ½-inch and large shall have equal percentage characteristics.

3) Three-way valves shall have linear characteristics.

g. Close-Off (Differential) Pressure Rating: Combination of actuator and trim shall provide minimum close-off pressure rating of 150 percent of total system (pump) head or system static head, whichever is greater.

3. Steam system globe valves shall have the following characteristics:

a. NPS 2 (DN 50) and Smaller: Class 125 bronze body, bronze trim, rising stem, renewable composition disc, and screwed ends with backseating capacity repackable under pressure.

b. Internal Construction: Replaceable plugs and stainless-steel seats.

1) Single-Seated Valves: Cage trim provides seating and guiding surfaces for plug on top and bottom of guided plugs.

2) Double-Seated Valves: Balanced plug; cage trim provides seating and guiding surfaces for plugs on top and bottom of guided plugs.

c. Sizing: For pressure drop based on the following services:

1) Two Position: 20 percent of inlet pressure.

2) Modulating 15-psig (103-kPa) Steam: 80 percent of inlet steam pressure.

3) Modulating 16- to 50-psig (110- to 350-kPa) Steam: 50 percent of inlet steam pressure.

4) Modulating More Than 50-psig (350-kPa) Steam: As indicated.

d. Flow Characteristics: Modified linear characteristics.

e. Close-Off (Differential) Pressure Rating: Combination of actuator and trim shall provide minimum close-off pressure rating of 150 percent of operating (inlet) pressure.

4. Butterfly Valves: 200-psig (1380-kPa), 150-psig (1034-kPa) maximum pressure differential, ASTM A 126 cast-iron or ASTM A 536 ductile-iron body and bonnet, extended neck, stainless-steel stem, field-replaceable EPDM or Buna N sleeve and stem seals.

a. Body Style: Lug.

b. Disc Type: 316 stainless steel.

c. Sizing: 2-psig (21-kPa) for heating hot water and 5-psig (35-kPa) for chilled water at design flow rate unless noted otherwise on drawings.

5. Terminal Unit Control Valves: Bronze body, bronze trim, two or three ports as indicated, replaceable plugs and seats, and union and threaded ends.

a. Rating: Class 125 for service at 125 psig (860 kPa) and 250 deg F (121 deg C) operating conditions.

b. Sizing: 2-psig (21-kPa) maximum pressure drop at design flow rate unless noted otherwise on drawings.

c. Flow Characteristics: Equal percentage, pressure independent characterized two-way control valves.

S. Current Transformers

1. The 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.

2. 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.

3. The current transformers shall meet the following specifications:

4. Frequency Limits: 50 to 400 Hz.

5. Insulation: 0.6 KV Class, 10 KV BIL.

6. Accuracy: ( 1% at 5.0 to 25.0 VA accuracy class with U.P.F. burden.

7. Provide a disconnect switch for each current transformer.

T. Relays

1. 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.

U. Solid State Relays (SSR): Input/output isolation shall be greater than lOE9 ohms with a breakdown voltage of 1500V root mean square or greater at 60 Hz. The contact life shall 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.

V.

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. Contractor 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 3 - EXECUTION

3.1 PROJECT MANAGEMENT

A. Provide a designated project manager who will be responsible for the following:

1. Construct and maintain project schedule.

2. On-site coordination with all applicable trades and subcontractors.

3. Authorized to accept and execute orders or instructions from Owner / Architect / Engineer.

4. Attend project meetings as necessary to avoid conflicts and delays.

5. Make necessary field decisions relating to this scope of work.

6. Coordination/Single point of contact.

3.2 SEQUENCE OF OPERATION

A. Trend Logs: Contractor shall set up the following trend logs.

1. Electric consumption and demand for each of the following:

a. Entire complex.

2. Overall energy consumption on a btu/ft/hr and a btu/sf/ytd (ytd = year to date) basis.

B. See drawings for sequence of operation, points list and control diagrams not identified above.

3.3 ELECTRICAL INSTALLATION

A. All temperature control devices herein specified shall be electric/electronic and shall be installed in accordance with all local and the current National Electric Code (NFPA 70).

B. Wiring of valves, switches, relays and other interlock wiring for the complete operation of the temperature control equipment furnished under Division 15 shall be by this contractors

C. The entire Ethernet backbone cable shall be installed in conduit.

D. All exposed temperature control wiring shall be installed in conduit and follow section “HVAC Instrumentation Cable and Wire” and division 16 specifications for proper product application.

E. All concealed temperature control wiring (i.e. above ceilings or in walls) shall be plenum rated and follow section “HVAC Instrumentation Cable and Wire” and division 16 specifications for proper support and product application.

F. All temperature control wiring exterior to the building shall be installed in conduit and follow section “HVAC Instrumentation Cable and Wire” and division 16 specifications for proper product application.

3.4 SYSTEM START-UP AND COMMISSIONING

A. When installation of the system is complete, calibrate equipment and verify transmission media operation before the system is placed on-line. All testing, calibrating, adjusting and final field adjustments shall be completed by the installer. Verify that all systems are operable from local controls in the specified failure mode upon panel failure or loss of power.

B. Provide any recommendation for system modification in writing to Owner. Do not make any system modification, including operating parameters and control settings, without prior approval of Owner.

C. The BASC contractor shall submit to the Architect/Engineer a detailed Dynamic Mode Test procedure and schedule, in writing, thirty (30) days prior to the period for the initial dynamic mode testing. During this time frame the Architect/Engineer will prepare a detailed punch list of the BAS installation.

D. The BASC shall provide a complete LNS database on CD and installed on the BASC provided Plexus NSX-2000 upon completion of the dynamic mode and endurance testing.

E. General Dynamic Mode Testing Requirements

1. Test a complete subsystem(s), one at a time, in a dynamic mode of operation simulating as many modes of operation as possible during the testing time period.

2. The Dynamic Mode Testing shall be organized to demonstrate to the operating staff and the Architect/Engineer the proper sequence of operation for all systems. All mechanical and electrical systems served by the BAS shall be substantially complete and accepted by the Owner prior to Dynamic Mode Testing.

3. Submit a schedule of events indicating dates, times, length of demonstration, required participants by sub-system, (30) days, prior to the first test.

4. A punch list will be generated as part of the Dynamic Mode Testing. This punch list (prepared by the Operating Staff and Architect/Engineer) will form the basis for BAS substantial completion.

5. Dynamic Mode Testing Requirements

a. Coordinate the testing procedures of this division with the associated systems of Division 15 and Division 16 so that the total electro-mechanical and BAS work can be observed.

b. Submit Installation Inspection Reports for all Control Units and Intelligent Devices indicating proper installation.

c. In conjunction with the work of other Divisions, thoroughly test all equipment and systems in a dynamic mode simulating all operating sequences including safety shutdown and emergency fire mode.

d. Initiate Endurance Testing Trend Logs for all systems in the time-frame and manner specified in this Section.

e. Demonstrate User Interface software graphics and penetration menus for the User Interface workstation and supervisory control unit.

F. Endurance Testing

1. Concurrent with the Dynamic Mode Testing initiate trend logs for each sub-system to be tested. The logs should monitor, in 15 minute intervals, all major I/O including control loops, alarms, discrete I/O status.

2. The trend logs shall be executed for a (2) week period for each sub-system. Submit the trend logs for review of the Operating Staff and the Architect/Engineer. Graphed summary results are encouraged to aid in the acceptance review process.

G. Upon receipt of the detailed punch list from the Architect/Engineer, prepare an Installation Inspection Report showing, by system, each outstanding item on the punch list and those items compiled by the contractor as outlined in Article 3.4.G. After all items appearing on the Installation Inspection Report are completed, make a second written punch list to the Architect/Engineer.

H. Installation Inspection Report

1. The Contractor shall verify prior to the Endurance Testing and Dynamic Mode Testing that all Control Units, Intelligent Devices, routers, gateways, etc. are ready for operation. This inspection shall verify that the following items have been properly installed.

a. Network connection.

b. Power connection.

c. Proper power supply voltage and type.

d. Electrical installation conforms to local code authorities.

e. Valves: (Normally open or closed).

f. Fail safe devices are equipped with spring return operators.

g. Device or control unit in a stand-alone mode accomplishes the following:

1) Operate smoothly throughout entire control range without binding or cogging.

2) Sensors have been calibrated to specifications.

3) Differential pressure transmitters have been zero and span adjusted.

4) With application code loaded, executes specific control loops effectively without hunting or hysteresis.

h. Point to point check of all digital I/O for continuity and correct execution of the functional operation.

i. Submit an Inspection Log prior to the Dynamic Mode Testing which enumerates the above in a check list form for all Control Units and Intelligent Devices. Indicate corrective action employed to deal with non-conforming or defective products and/or product installations.

I. Owner Acceptance: Upon the successful completion of the Dynamic Mode test, the BAS shall be considered acceptable to the Owner. At this time, the Controls Contractor shall issue a letter to the Architect/Engineer signifying Owner acceptance of installation of the BAS, and that the BAS is substantial complete. The date of the letter will signify the start of the system warranty period.

3.5 TRAINING

A. The contractor shall provide factory-trained instructor to give full instruction to designated personnel in the operation of the system installed. Instructors shall be thoroughly familiar with all aspects of the subject matter they are to teach. The contractor shall provide all students with a student binder containing product specific training modules for the system installed. All training shall be held during normal working hours of 8:00 am to 4:30 PM weekdays.

B. Provide minimum of 40 hours training for Owner Operating Personnel’s designated operating personnel. Training shall include:

1. Explanation of drawings, operations and maintenance manuals

2. Walk-through of the job to locate control components

3. PFC/ASC controller operation/function

4. Operator control functions including plug-ins and any custom software.

5. Explanation of adjustment, calibration and replacement procedures

6. Student binder with training modules.

END OF SECTION 15900

October 26, 2010

Addendum 2 15900 - 2 HVAC Instrumentation and Controls