COMMON ELECTRICAL WORKS FOR INTEGRATED AUTOMATION SYSTEM

COMMON ELECTRICAL WORKS FOR INTEGRATED AUTOMATION SYSTEM

• RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
  2. Specifications throughout all Divisions of the Project Manual are directly applicable to this Section, and this Section is directly applicable to them.
  3. Refer to Division 26, 27, and 28 for project related standards pertaining to electrical installation that shall apply to this Division.
  4. <Add references to project related documentation that provides additional information on the unique electrical requirements or status of the facility>

• GENERAL CODE AND DIVISIONAL ADHERENCE

  • Comply with National Electric Code Requirements.
  • Apply to all state and local codes governing the location of this project identified to be within the regulating body of <City, State>.
  • Adhere to applicable local codes as called out in section 25 00 00.

• SUMMARY

  1. Electrical requirements pertaining to the installation of the IAS and the components required to accomplish the desired system performance.
  2. Contractor is responsible for the following:
     • Providing and installing all low voltage step-down transformers with associated low voltage connections, power supplies and power cabling necessary for the control system.
     • Providing and installing all communication cable <Enterprise, LonTalk, MODBUS (powered and non-powered), BACnet> and conduit as part of the control system, including the Ethernet cabling connecting Niagara N4 Network Controllers, Niagara N4 IP Field Controllers, CSS Server, and Workstations where called out on the drawings (Facility Local Area Network / FACLAN) and the communication bus between controllers (Device Level Network – DLN).

<It is important to properly develop and coordinate detailed IAS drawings in conjunction with the Division 25 specifications to properly identify the physical requirements of the installation. The IAS drawings should call out design and implementation details for the DLN and FACLAN that are important for the performance of the system. Utilize the IAS drawings to highlight important system parameters>

3. Providing and installing all Niagara N4 Network Controllers, Niagara N4 IP Field Controllers, DDC controllers, ancillary hardware, and interface equipment as part of the control system.
4. Providing and installing conduit, fittings, panels, enclosures, and hardware as specified in these specifications, on the drawings and as required by Code.
5. Providing Low voltage power to all IAS related devices.
6. Providing high voltage power to system components (e.g. actuators) requiring such power.

• REFERENCE STANDARDS

  1. The latest published edition of a reference shall be applicable to this Project unless identified by a specific edition date.
  2. All reference amendments adopted prior to the effective date of this Contract shall be applicable to this Project.
  3. All materials, installation and workmanship shall comply with the applicable requirements and standards addressed within all references.

• GENERAL INSTALLATION REQUIREMENTS

  1. Install low voltage power, LAN and DLN communication trunks in conduit in the following locations regardless of local building code allowances otherwise.
     • Mechanical rooms
     • Electrical rooms
     • Telecommunication rooms
     • Vertical risers
     • Open Areas where the wiring will be exposed to view or tampering.
  2. Contractor shall be fully responsible for noise immunity and rewire in conduit if electrical or RF noise affects performance.
  3. Conduit fill ratio shall not exceed 40% of its rated capacity.
  4. Splices
     • Splices in shielded cables shall consist of terminations and the use of shielded cable couplers to maintain the integrity of the shielding.
     • Splices and Terminations shall be in accessible locations. When required splices shall take place within an electrical box and both cables shall be secured by wire connectors.
     • Splices are not permitted within the IAS FAC LAN or DLN communication cables. Only continuous bus topologies, MS/TP or continuous homeruns are allowed for these networks.
     • Splices shall not be used to form ‘star’ type network configurations for the FAC LAN or DLN.
     • Required splices shall not be composed of wire nut type connections but shall utilize high quality splicing components or terminal blocks.
     • Follow manufacturer suggested procedures for proper slicing.
  5. Provide and install a spare DLN communication cable at all <Master or Peer to Peer> control network locations. This cable shall be a separate color different than the color used for the primary operational bus. Run this spare cable parallel to the operating cable to and from each communicating device.

<Installing a spare DLN cable is an insurance policy for design issues and communication problems, and is an asset for future needs. A spare DLN communication cable should be provided for all Master BACnet controllers or LonWorks devices to allow for cost effective expansion and rewiring in the event of an overloaded DLN. The spare cable represents a minimal increase in cost during implementation but could provide significant cost savings in the future. Identify this requirement in the IAS Drawings.>

1. Spare cables shall match the conductor count and ratings of the primary cable.
2. Conceal conduit within finished shafts, ceilings and walls as required.
3. Install exposed conduit parallel with or at right angles to the building’s walls.
4. Tag all equipment, panels, cables, conduits, junction boxes, etc., as called out in the “Identification” section of this specification.
5. Perform installation of all devices in the manner specified by each manufacturer. Aside from product submittal requirements, provide manufacturer’s installation instructions for verification as requested by the Owner.
6. Where Class 2 wires are in concealed and in accessible locations including ceiling return air plenums, approved cables not in raceway may be used provided that:
   1. Circuits meet NEC Class 2 (current-limited) requirements. (Low-voltage power circuits shall be sub-fused when required to meet Class 2 current-limit.)
   2. All cables shall be UL listed for application, i.e., cables used in ceiling plenums shall be UL listed specifically for that purpose.
7. Do not install Class 2 wiring in conduit containing Class 1 wiring. All wires run inside a shared conduit shall have the same insulation ratings.
8. Do not install exposed low voltage cable within 4 feet of conduit, bus duct, power equipment or cables containing Class 1 wiring. Do not use conduit containing line voltage as a means to support low voltage systems.
9. Boxes and panels containing high voltage may not be used for low voltage wiring except for the purpose of interfacing the two (e.g. relays and transformers). A dedicated box shall be installed which is used only for the interfacing of these low and high voltage devices. No other conductors shall be contained in this box.
10. Where Class 2 wiring is run exposed, wiring to be run parallel along a surface or perpendicular to it, and NEATLY tied at 10 ft intervals.
11. When securing exposed wire DO NOT secure wire to objects which are not an integral part of the building structure. Therefore do not use items such as ceiling supports, light fixtures, conduit, pipe or the like to secure low voltage wire. Provide a dedicated wiring support system for all communications (DLN, LAN) and power wiring, e.g. dedicated bridle rings, J- Hooks, etc.
12. All wire-to-device connections shall be made at a terminal blocks or terminal strip within a Digital Control Panel. Wiring within a DCP shall be done in a manner that will allow for the replacement of a controller or device (of different make or model) while the field wires remain terminated on a separate and independent terminal block located inside of the DCP. This terminal block shall be labeled with the wires function. Controllers with a removable terminal block shall not be a substitute for this requirement.
13. All wiring within enclosures shall be neatly bundled and anchored to permit access and prevent restriction to devices and terminals. All wiring pathways within the DCP shall be enclosed in plastic wire way.
14. All field wire-to-wire connections shall be at a terminal block, or with a crimped connector located within a covered junction box. Both wires shall be secured using zip ties or wire clamps.
15. Tighten electrical connectors and terminals according to manufacturer’s published torque-tightening values. If manufacturer’s torque values are not indicated, use those specified in UL 486A and UL 486B.
16. All exposed low voltage wiring not run in conduit shall be properly supported by the appropriate hardware. Use Loop Supports, Drop-Wire Clips, J-Hooks, Bridle Rings, and/or Beam clamps to support and secure low voltage wiring. Secure in 10 foot intervals. Existing Cable trays may be used upon seeking written approval from installing trade.
17. For conduit to be encased in concrete use PVC Schedule 40 conduits <Coordinate with Division 26 electrical requirements>.
18. Conductors shall not be supported by the ceiling system or ceiling support system. Conductors shall be pulled tight and be installed as high as practically possible in ceiling cavities.  Wiring shall not be laid on the ceiling or duct.
19. Conductors shall not be installed between the top cord of a joist or beam and the bottom of roof decking.

• IAS PRODUCTS

• PRODUCTS GENERAL
  1. The use of electrical products and components shall be as specified in Division 26 and related Divisions.

• IAS WORK EXECUTION

• NETWORK COMMUNICATION REQUIREMENTS

1. Wired network communication shall be via channels consisting of <Category 5E, Category 6 or Level IV> network cable, installed in a 3/4” EMT as required by code and these specifications.
2. In all Primary DLN communication conduits, provide and install two (one spare), twisted multi-conductor DLN cables of different colors. Maintain these discrete colors throughout the installation of the project.
3. Communication conduits shall not be installed closer than 6 ft from high power transformers or run parallel within 4 feet of electrical high power cables. Care shall be taken to route the cable as far from interference generating devices as possible.
4. All shields shall be ground (earth ground) at one point only, to eliminate ground loops.
5. 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 practices.

• Surge Protection

  1. The Contractor shall furnish and install power supply surge protection, filters, etc. as necessary for proper protection of all controllers and IAS network equipment. All equipment and networks furnished under this contract shall be capable of handling voltage variations 10% above or below measured nominal value with no affect on hardware, software, communications and data storage.
  2. Primary communications trunk wiring shall be protected with a transient surge protection device providing the minimal protection specifications of the General Semiconductor, Model #422E device.

• POWER

  1. Provide transformers for all control units. Transformers may be used to power up to four Control Units.
  2. Install transformers on spare or dedicated circuits and label these circuits with the exact equipment being controlled.
  3. The controls contractor shall provide transformers and all required low voltage to low voltage IAS control devices.
  4. The controls contractor shall responsible for providing 120 VAC power to all IAS field devices such as high torque actuators and sensors requiring line voltage which is not depicted on the project drawings.

• INPUT / OUTPUT AND ANCILLARY HARDWARE WIRING

  1. Input/Output Control Wiring:
     • Thermistor wiring shall be two conductor, twisted, shielded, minimum <22>
     • Other analog inputs shall be a minimum of number <22> gauge, twisted, shielded.
     • Binary control function wiring shall be a minimum of number <18>
     • Analog output control functions shall be a minimum of number <22> gauge, twisted, shielded cable, and number of conductors as required.
     • Binary input wiring shall be a minimum of number <22> gauge, twisted, shielded.
     • 120V control wiring shall be <#14 THHN> in 3/4” conduit <Coordinate with Division 26 electrical requirements>.
  2. <Modify the following as required to address specific equipment included within the scope of this project> Provide interlock wiring between supply and return fans and 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.

• 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 <Coordinate with Division 26 electrical requirements>.
  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. <All temperature controls Junctions boxes and cover plates shall be painted ‘Blue’ in order to easily identify the temperature controls conduit. Match color code for existing BAS conduit installed via previous phases. Do not use red.>
  5. Plug or cap all unused conduit openings and stub-ups. Cap open ends of conduits until conductors are installed. Do not use caulking compound.
  6. Provide Fire Stopping at all wall and floor penetrations.
  7. Route all conduit to clear beams, plates, footings and structure members. Do not route conduit through column footings or grade beams.
  8. Set conduits as follows:
     1. Expanding silicone fire stop material where conduit is run between floors and through walls of fireproof shaft.
     2. Oakum and lead, sealed watertight penetration through outside foundation walls.
  9. Where conduit is attached to vibrating or rotating equipment, flexible metal conduit with a minimum length of 18 inches and maximum length of 36 inches shall be installed and anchored in such a manner that vibration and equipment noise will not be transmitted to the rigid conduit.
  10. Where exposed to the elements or in damp or wet locations, waterproof flexible conduit shall be installed. Installation shall be as specified for flexible metal conduit.
  11. Provide floor, wall, and ceiling plates for all conduits passing through floors, walls, or ceilings. Use prime coated cast iron, split-ring type plates, except with polished chrome-plated finish in exposed finished spaces.
  12. All wires entering panels, junction boxes or enclosures shall have proper grommets and fittings to secure wire.

• IDENTIFICATION

• Wire Tags
  1. All multi-conductor cables, including those for all I/O devices, in all pull boxes and terminal strip cabinets shall be uniquely tagged at both ends. Keep a catalog of wire identification for submittal to the Owner at the project’s completion.
  2. Include a printed, panel wire tag matrix within each DCP.
  3. Tags shall be machine made (not hand written) and shall be permanently affixed to each wire. Tags shall be made of a plastic or vinyl material that is resistant to moisture and fading.
  4. Equipment Tags shall be made using the following format:
     1. Floor of Origin_Equipment_Device_Destination_Termination Floor
     2. An example of this format is as follows:
        • 23_AHU5_MAT_DCP-7_22
        • 11_CWP_STS_DCP-1_09
• Conduit Tags
  • Provide tagging or labeling of conduit so that it is always readily observable which conduit was installed or used in implementation of this Work. Tags are to be provided for conduit located in Mechanical, Electrical, Telecommunication, and vertical risers and at major pieces of equipment.
  • Conduit Tags shall be meaningful and descriptive, and should include the destination. An acceptable example is as follows:
    1. IAS – DCP-3 to VAV 107
    2. IAS – AHU12 MAT to DCP-12
  • <(Coordinate with 3.05 D) Junction and Pull boxes shall be painted and identified in a blue color as defined in this section.>
• Miscellaneous Equipment Identification
  • Screwed-on, engraved black lamacoid sheet with white lettering on all control panels and remote processing panels. Lettering size shall be readable from 20 feet.
  • Inscription, subject to review and acceptance, indicating equipment, system numbers, functions and switches, provided for panel interior wiring, input/output modules, local control panel device identification.
• <(If included in Scope of Work) VAV Box Identification
  1. Provide a clear label with black letting to adhere to the ceiling grid. Lettering shall be large enough to read from the floor level. Tag the grid at the appropriate ceiling tile location to gain access to the VAV box for maintenance. Label a small sample of boxes and then seek approval from the Owner prior to repeating for each box.
  2. Label each thermostat with the VAV Box it serves. Provide a machine made vinyl tag on an inconspicuous location of the thermostat cover such as on the underside or inside of the cover if it is easily removable.
  3. When thermostats are used as DLN-Ports or DLN-Jacks, label which thermostats that are serving this function. Provide a machine made vinyl tag on an inconspicuous location of the thermostat cover such as on the underside or inside of the cover if it is easily removable.
  4. Label a small number of thermostats and seek approval from the Owner before completing.>
• Wire Coloring Codes: Utilize a dedicated colored wire jacket for each type of wire defined below. Maintain wire color throughout the installation. Provide a matrix identifying the color codes in the project O&M manuals and in within each DCP. Use a dedicated color jacket for the following do not repeat color.
  <(If the project is to expand an existing system include the following) IMPORTANT NOTE: A color matrix was established during an earlier phase of this project. Contractor shall verify and continue to use the existing coloring scheme.>
  1. Niagara N4 Network Controller Communication Bus<Provide color scheme if known>
  2. Analog Points <Provide color scheme if known>
  3. Digital Points <Provide color scheme if known>
  4. Low Voltage Power (24V) <Provide color scheme if known>
  5. Emergency Power, if required <Provide color scheme if known>
  6. Primary/Master Communications Bus (e.g. LonWorks, BACnet) <Provide color scheme if known>
  7. Spare Communication Bus (e.g. LonWorks, BACnet) <Provide color scheme if known>
  8. Secondary/Slave (e.g. BACnet) <Provide color scheme if known>

<If there are other communication buses for the project identify them in the following sections>

9. Primary Communication Bus <no2 etc….> (e.g. LonWorks, BACnet, MODBUS or other) <Provide color scheme if known>
10. Secondary or Spare Communication Bus <no2. etc….> (e.g. LonWorks, BACnet, MODBUS or other) <Provide color scheme if known>