Attachment 3 Specifications.pdf

USDA-ARS/NCGR-Corvallis

CORVALLIS, OR

21046

SECTION 13 12 01 Page 1

PART 1 GENERAL

SECTION 13 12 01 GREENHOUSE AND SCREENHOUSE STRUCTURE

1.1 SECTION INCLUDES

a. Roof vents, side vents hardware

1.2 RELATED DOCUMENTS

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

Related Sections include the following:

Section 13 12 02, GREENHOUSE AND SCREENHOUSE SPECIAL EQUIPMENT AND

SYSTEMS.

1.3 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN WELDING SOCIETY (AWS)

AWS D1.1/D1.1M (2020) Structural Welding Code - Steel

ASTM INTERNATIONAL (ASTM)

ASTM A36/A36M (2019) Standard Specification for Carbon

SECTION 13 12 01 Page 2

Structural Steel

ASTM A123/A123M (2017) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A307 (2021) Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength

ASTM A325 (2014) Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength

ASTM A449 (2019) Standard Specification for Hex Cap Screws, Bolts, and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use

ASTM A653/A653M (2020) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM B209 (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B221 (2021) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM D520 (2000; R 2011) Zinc Dust Pigment

ASTM E741 (2017) Standard Test Method For Determining Air Change in a Single Zone by Means of a Tracer Gas Dilution.

ASTM F844 (2019) Washers, Steel, Plain (Flat), Unhardened for General Use

SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC Paint 20 (2019) Zinc-Rich Primers (Type I, Inorganic, and Type II, Organic)

1.4 DESCRIPTION

a. Primary Components for greenhouse include but are not limited to:

(1) Sealant work associated with components of the greenhouse.

(2) Anchors, shims, fasteners, inserts, accessories and other support brackets.

(3) All required flashing, exposed and concealed.

(4) Motorized roof vents and side vents.

(5) Support structure and screen material for insect screens where vents are called for.

SECTION 13 12 01 Page 3

1.5 SYSTEM PERFORMANCE REQUIREMENTS

a. General: Provide the manufacturer's standard screenhouse components that have been adapted to the application indicated, the sizes indicated and comply with performance requirements.

b. Unacceptable Conditions: Include noise and vibration created by thermal movement; structural movement; and loosening, weakening or failure of fasteners, attachments and other components.

1.6 WELDING

a. Welded steel components shall be hot-dip galvanized per ASTM A123/A123M after welding.

b. Welding aluminum components shall be bronze weld technique.

1.7 INSTALLER

a. Experience: The manufacturer and installer normally involved in similar construction activities and shall supply adequate proof to the Architect of their experience in 5 comparable projects within the last 5 years.

1.8 PROJECT CONDITIONS

a. Site Measurements: Take measurements on site before starting fabrication. Show these measurements on the final shop drawings.

Coordinate fabrication schedule with work progress to avoid delays.

b. Discrepancies: Do not start fabrication until discrepancies found during the survey and site measurements are corrected.

1.9 COORDINATION

a. Coordinate sequence of installation of the system with that of related works described in other sections to ensure that assembling, including flashings, fittings and joint sealants are protected against weather and other damages caused by weathering, corrosion, etc.

PART 2 PRODUCTS

2.1 MATERIALS

a. Structural and Bracing Components

(1) Extruded Aluminum Bars and Shapes: Comply with requirements of ASTM B221, alloy 6063-T6

(2) Galvanized Steel: Per ASTM A36/A36M hot-dipped galvanized after fabrication to ASTM A653/A653M-Z275 and ASTM A123/A123M.

b. Plate and Sheet Flashing

(1) Aluminum: To ASTM B209, 3003-H4 alloy, AA-CZZA41 mill finish,

0.080 in for supported flashing and 0.125 in thickness for unsupported flashing.

(2) Galvanized Steel: For supported flashing, pre-galvanized 0.063 in minimal thickness, to ASTM A653/A653M-Z275 and ASTM A123/A123M galvanization standards. For unsupported flashing, use 0.125 in.

SECTION 13 12 01 Page 4

c. Aluminum Extrusions

(1) Aluminum, alloy 6063T6, machinable, 30 kips ultimate tensile strength.

d. Finish: In all cases, provide mill finish for aluminum and standard finish for pre-galvanized or hot-dip galvanized steel. Sheared or cut pieces of galvanized steel shall be painted with 2 coats of specified galvanized coating. Any welded steel component shall be hot-dip galvanized after welding.

e. Bolts, Nuts and Washers: To ASTM A307 grade A. Plain washers to ASTM F844. Beveled washers: ANSI B27.4 Type B. High strength bolts, nuts and washers: ASTM A325 Type 1.

f. Hot Dip Galvanizing: Galvanize steel, where indicated, to ASTM A123/A123M and ASTM A653/A653M.

g. Accessories: Steel cables, turnbuckles, rods, clamps and all other accessories are aluminum or hot-dip galvanized steel.

h. Gaskets and Joint Fillers: Provide the manufacturer's standards.

i. Fasteners and Accessories: Provide noncorrosive fasteners and accessories that are compatible with materials used in the framing system. For fastening to foundation kneewall, use ANSI steel bolts.

Provide neoprene washers on fasteners to ensure weather tight enclosure. Do not provide on anchor bolts to structure.

j. Touch-Up Paint:

(1) Zinc-rich coating: Conforms to SSPC Paint 20, Type II. ASTM D520 Type III Zinc Dust - 0.002 percent maximum lead by weight, meets Class B requirements for slip coefficient and creep resistance, 0.56.

k. Sealing Products

(1) Comply with manufacturer's requirements.

(2) All products shall be compatible to one another.

2.2 MOTORIZED ROOF VENTS AND SIDE VENTS

a. Vent Insect screening: Provide structural elements, screen attachment aluminum extrusions and other devices as necessary to facilitate the installation of the pleated screen (accordion type) on roof and side vents, vertical screening on sashes, as shown on drawings and specified in Section 13 12 02.

PART 3 EXECUTION

3.1 EXAMINATION

a. Examine the supporting structure and substrate for dimensions and tolerances, materials conditions, and support before beginning the installation. Carefully check provisions for anchorage and adjustment, allowances for expansion and contraction and conditions of preset flashings and flashing connections. Do not proceed until unsatisfactory conditions in affected areas have been corrected.

3.2 PREPARATION

SECTION 13 12 01 Page 5

a. Dissimilar Metal Surfaces: Paint dissimilar metal surfaces other than stainless steel, zinc, or small areas of white bronze in contact with aluminum with a prime coat of zinc-chromate primer, followed by one or more coats of aluminum paint or other coating free of lead pigment, with a heavy coat of cold-applied asphalt mastic, or separate the dissimilar metals by sealing, non-absorptive tape, or gasket recommended by the manufacturer.

3.3 INSTALLATION

a. Damage: Comply with the manufacturer's instructions for protecting, handling and installing fabricated greenhouse components, with particular care and attention to preservation of applied finishes, glass edges and use of sealants. Discard members damaged before installation and remove installed members that become damaged; provide acceptable new components.

b. Anchors: Anchor components securely and permanently in place in the manner indicated. Shim and use attachment methods that permit adjustment for construction tolerances, irregularities and alignment.

Allow for movement that results from changes in thermal conditions.

Provide separators and isolators to prevent corrosion, electrolytic deterioration and "freeze-up" of moving joints. Anchor framing components to allow loads to be transmitted to the anchoring system.

c. Field Welding: Field welding is prohibited without a written approval from the Engineer. The Contractor having field welded can be required to replace damaged welded components at the request of the Owner and at Contractor's expenses.

d. Coordination: Coordinate installation and connections of seals, insulation, and flashings at assemblies to maintain continuity of thermal and water barriers.

e. Manufacturer's Recommendations: Install per accepted shop drawings and following manufacturer's written recommendations.

3.4 CAULKING

a. Apply sealing product in joints between door frames and adjacent building parts, on exterior perimeter of openings, in recessed masonry joints, etc., and anywhere specified on drawings or where required to meet tightness requirements. Clean without delay adjacent surfaces and leave work clean and in perfect condition. As work progresses, remove excess and smudges of insulating product with recommended cleaning product. Remove masking material when joints are completed.

Although each and every spot requiring insulation is not shown on drawings, this section is responsible for sealing all that is required to obtain an uninterrupted air and watertight envelope. No caulking should be apparent on works concerned in this section, unless otherwise specified by the Architect.

-- End of Section --

SECTION 13 12 02 Page 6

SECTION 13 12 02

SCREENHOUSE AND GREENHOUSE SPECIAL EQUIPMENT AND SYSTEMS

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this section to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM A653/A653M (2020) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

1.2 SECTION INCLUDES

a. Ridge and side vents

b. Insect Screens

1.3 RELATED DOCUMENTS

Drawings and General Provisions of the contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

Related Sections include the following:

Section 13 12 01 SCREENHOUSE STRUCTURE

Section 25 50 01 SCREENHOUSE CONTROL SYSTEM

1.4 DEFINITIONS

a. Galvanization: The words "galvanizing" and "galvanized steel" in this section refers to ASTM A653/A653M-18 (2018). If the manufacturing of a piece of equipment requires welding, the piece should be hot-dip galvanized after manufacturing.

b. Finishes: Aluminum: Refer to Section 13 12 01 for aluminum alloys, qualities and finishes.

1.5 SPARE PARTS

a. Provide following spare parts:

(1) Insect screen: 50 SF of each type. Include replacement accordion (pleated) screen suited for 3 ridge vents.

1.6 GALVANIZATION

Edges of sheared steel sheet, cut tubing and other galvanized support accessories must be painted with cold galvanizing paint.

Zinc paint as specified in Section 13 12 01.

SECTION 13 12 02 Page 7

PART 2 PRODUCTS

2.1 ROOF AND SIDE VENTS DRIVE SYSTEM

a. Intent: Provide roof and side vent automation systems for greenhouses as described in Section 13 12 01. System to be adapted to structure and glazing systems as described in Section 13 12 01.

b. The roof vents have one (1) motor per vent, where indicated on drawings and in Section 13 12 01.

c. Roof vents: Provide standard rack and pinion system for all indicated roof vents. Components include the following:

(1) Drive shaft, galvanized steel with section modulus allowing 3 times that of normal operating conditions.

(2) Drive shaft couplings, pressure or locking type, made of galvanized steel, steel cast, or aluminum cast.

(3) Shaft support brackets, galvanized steel, minimum thickness 12 Ga with center ball bearing or Delrin bushing.

(4) Galvanized steel racks, straight or curved as shown on drawings made of minimum 11 GA galvanized steel. Attachment easily removable at ridge vent bottom rail. Spacing of racks is maximum 3 ft. First and last rack of vent is no more than 18 inches away from either end of vent. Length to accommodate shown angle of opening.

(5) Steel pinions secured to drive shaft with 3 set screws.

(6) Permanent U.V. stable soft bulb seal on all edges. Refer to Section 13 12 01 for acceptable seal materials.

(7) Supply gearmotor and gearbox assemblies, UL approved, 120V, 1, 60 Hz, totally enclosed, with automatic break, thermal overload, and adjustable internal built-in limit switches. Mercury bulb type switches are not acceptable. Limit switches outside gearbox assemblies are not acceptable. Motor shall be permanently lubricated for lifetime service. Supply support brackets devices and other accessories to fix to screenhouse structure. No external limit switches accepted.

d. Side vents: Provide roll-up clear polyethylene curtain. Components include the following:

(1) Drive shaft, galvanized steel with section modulus allowing 3 times that of normal operating conditions.

(2) Drive shaft couplings, pressure or locking type, made of galvanized steel, steel cast, or aluminum cast.

(3) Shaft support brackets, galvanized steel, minimum thickness 12 Ga with center ball bearing or Delrin bushing.

(4) Top of curtain is anchored to structure with the use of continuous aluminum extrusion. Both ends and bottom shall have an overlap with the fixed glazing material so to make sure the curtain is airtight when closed.

SECTION 13 12 02 Page 8

(5) Polyethylene curtain shall be made with greenhouse grade 6 mil clear polyethylene

(6) Provide strips of clear plastic woven material attached to top and bottom of side and end walls. Strips are designed to eliminate curtain flapping

(7) Supply linear motor or gearmotor, UL approved, 120V, 1, 60 Hz, totally enclosed, with automatic break, thermal overload, and adjustable internal built-in limit switches. Mercury bulb type switches are not acceptable. Limit switches outside gearbox assemblies are not acceptable. Motor shall be permanently lubricated for lifetime service. Supply support brackets devices and other accessories to fix to screenhouse structure and guide the travel path of the curtain. No external limit switches accepted.

e. Electrical Panels: If not integrated with the motor, provide panels with terminals for motors, potentiometers, limit switches, etc., with NEMA 4 casing, UL approved as electrical component. Install panel on or close to gearmotor assembly. Must be factory pre-wired. Provide all wiring diagrams.

2.2 INSECT SCREENS

a. Generalities: Insect screening is provided at each opening of every screenhouse. Supply insect screen systems made of U.V. stabilized polyolefin yarns. Material to be covered by a 3-year warranty against damage from exposition to light in the screenhouse. Material for each application are:

(1) Roof Vents: Pleated type screening (accordion type) designed to stop whitefly, aphid and western flower thrip, with hole size of 150 m by 210 m. The material is 100 percent polyolefin, transmitting 91 percent of direct light (PAR) and reducing airflow by 42 percent compared to free opening.

(2) Side Vents: Material designed to stop screenhouse whitefly, aphid and western flower thrip, with hole size approximately of 150 m by 210 m. The material is 100 percent polyolefin, transmitting 91 percent of direct light (PAR).

b. Pleated Screening System Generalities (roof vents):

(1) Intent is to provide a system that completely screens out insects at the vent opening. The ends of each vent shall be sealed to provide a completely insect proof enclosure for incoming and/or outgoing air.

(2) The screening system is provided with a spring-return or similar device that extends when the vent opens and keeps the screen inside and neatly folded when the vent closes. Components are made of aluminum or galvanized steel. Refer to Section 13 12 01 for alloys. Screens are not perforated in any way.

c. Vertical Sidewall Screening System

(1) Screen Holding System: Provide a screen holding system made of extruded aluminum. The holding system is positive on each of the 4 sides of the curtain. The system shall allow easy removal of screens for cleaning and maintenance.

SECTION 13 12 02 Page 9

PART 3 EXECUTION

3.1 GENERAL

a. Modification to Shown Design: Specialized systems and equipment of the screenhouses combine to create a growth system. Tolerances on position and dimensions of all components are very limited. The Contractor shall obtain written permission of the Government for any modification. The Contractor is responsible of all changes in his works or that of other trades caused by unauthorized deviations from the contractual requirements.

b. Glazing Integrity: Do not puncture or make any opening of any kind, of any size in the glazing of the greenhouses without written authorization by the Government unless specifically called for on the drawings. Any glazing pane perforated without such permission shall be replaced by the Contractor at his costs, to the satisfaction of the Owner. The Contractor shall reposition at his costs the conduit, wire or mechanical component for which the glazing was perforated. Any opening in any glazed wall of the screenhouses shall be made with the written authorization of the Architect and shall be sealed with caulking material per manufacturer's requirements.

c. Welding: Do not weld any metal to the installed structure either inside or outside unless specifically approved by the Government. If welding is required and approved, all weld flux and spatter shall be completely removed. All sharp edges and projections shall be ground smooth. Finish must be restored as specified herein.

d. Components: Components required to hold, support or suspend a piece of equipment shall be fixed to the structure (posts, end posts, trusses and purlins) without perforating said structure. Bolts, U bolts, saddles or alike must be used unless approved by the Architect. All such components shall be galvanized steel or aluminum.

e. Wood: No wood shall be allowed in any screenhouse.

3.2 ROOF AND SIDE VENTS, INSECT SCREEN SYSTEMS

a. Installation: Install motorized units, supports and drive shafts in each screenhouse, according to the manufacturer's instructions where and as indicated on drawings. For the ridge vents, no support or attachment of any kind allowed at the lower chord of trusses in screenhouses. It is the responsibility of this Contractor to ensure that racks do not interfere with other systems. Rack spacing is maximum 3 ft. First and last rack on any system shall be no more than 12 inches from the end of the vent.

b. Adjustment

(1) Adjust the limit switches so that the vents movement does not stress mechanical or structural components or pleated insect screens (ridge vents).

(2) Respect tolerances, dimensions and clearances indicated on drawings. No gap larger than 1/8 in shall be acceptable between screen panels and framing.

(3) Adjust and lubricate all moving parts to obtain noiseless full opening and closing.

SECTION 13 12 02 Page 10

(4) In the case of pleated screens, devices must be added to ensure the screen material will not get snagged by a closing vent.

Material must be entirely kept inside the screenhouse when the vent is closed.

(5) Verify that bulb-type neoprene gaskets are present on the full perimeter of each vent and into their proper housing.

c. Screening Systems

(1) Install screening systems at the ridge vents, so that screening material is stretched and not sagging when the vent is fully open.

(2) Make sure the installation is sealed against insect penetration at every joint. Verify that mohair seals, where used, close tightly around racks.

(3) All components and attachments to be made of galvanized steel or aluminum.

(4) Coordinate with other trades to ensure accessibility to screening system is not compromised by mechanical or electrical systems or that screening system integrity is not compromised by mechanical or electrical systems.

d. Airtightness: Special care must be taken at partitions and end walls to ensure airtightness when ridge and side vents are closed.

3.3 DEMONSTRATION

a. The Contractor will provide a demonstration and explain maintenance procedure to the Owner. The demonstration will include but not be limited to the following elements:

(1) Adjustment of system.

(2) Maintenance of accessories.

(3) Maintenance of motor and drive system.

(4) Adjusting the limit switches.

(5) Repairing and changing screen material.

b. The process will be given with, in attendance, at least 3 maintenance people at the facilities. The process shall include actual adjustment and alignment work performed by maintenance personal. The Owner shall select days when the demonstration/training will occur.

3.4 FIELD VERIFICATION

a. The following systems need to successfully go through a start-up procedure in accordance with manufacturers recommendations. For each test described below report in writing to the Government. Tests below are in addition to other tests described in part 3 of these specifications.

(1) Ridge and side vents: Fully open and close vents on a continuous basis for one (1) hour. Verify that racks move freely and noiselessly. Verify that the insect screen does not get caught in vent mechanism or frame. Correct deficiencies. At the end, fully close vents and verify air tightness on all edges. Confirm tight

SECTION 13 12 02 Page 11 closure of vents.

(2) Insect screens: Verify screening seal at all edges. Confirm screen was not damaged. Replace as necessary.

3.5 CLEANING

Replace free of charge any component or system damaged during construction prior to final acceptance.

SECTION 25 50 01 Page 1

SECTION 25 50 01

SCREENHOUSE AND GREENHOUSE CONTROL SYSTEM

12/21

1.1 SECTION INCLUDES

a. Operator Remote Cabinets (ORC)

b. Motor Starters Cabinets (MSC)

c. Sensors and related accessories

1.2 RELATED DOCUMENTS

a. Section 13 12 02 GREENHOUSE AND SCREENHOUSE SPECIAL EQUIPMENT AND

SYSTEMS

b. Sections of Division 26 ELECTRICAL.

1.3 DESIGN INTENT

This project aims at establishing a control system at the USDA - ARS National Clonal Germplasm Repository (NCGR) over the existing Greenhouses.

a. All loads of any voltage shall be switched from the MSC cabinets. No load shall be switched from the ORC cabinets, including all 24 V loads identified on the lists on the drawings.

SECTION 25 50 01 Page 2

1.4 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2020; ERTA 20-1 2020; ERTA 20-2 2020; TIA

20-1; TIA 20-2; TIA 20-3; TIA 20-4)

National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 50 (2015) UL Standard for Safety Enclosures for Electrical Equipment, Non-Environmental Considerations

UL 508A (2018; Reprint Aug 2021) UL Standard for Safety Industrial Control Panels

1.5 GENERALITIES

a. Design Intent: Integrated control systems are used to manipulate specialized equipment designed to accomplish:

(1) Modulating vents (based on indoor/outdoor temperatures, humidities, light levels, wind direction, and wind intensity).

b. Load Switching: All electrical loads under computer control are activated through motor starters, contactors and relays located in the MSC cabinets. No load may be directly under computer control or controlled through the computer interface cabinet (ORC). All starters, contactors and relays will have 24 VAC coils.

c. Provide all starters and relays and adjustable speed drives(Refer to specification Section 26 29 23 ADJUSTABLE SPEED DRIVE (ASD) SYSTEMS UNDER 600 VOLTS), required to control motors and other drives.

1.6 DEFINITIONS

a. Owner: The "Owner" is defined as the USDA / ARS

b. User: The "User" is defined as any person making scientific research in the new facilities.

c. Environmental Conditions: Environmental conditions refer to air temperature, air moisture content and light level from floor to 10 ft above floor within the Screenhouse enclosure.

d. Setpoint: Setpoint is defined as an environmental condition required by the User that the control system must maintain.

e. Constant: A control constant is a User set constant used to limit the operation of a mechanical system.

f. Parameter: Control parameter is a physical measurement, of temperature, light level, concentration or exterior weather conditions used by the control system to set the operation of the mechanical systems in order to maintain the setpoints fixed by the User.

SECTION 25 50 01 Page 3

g. Systems: Mechanical system refers to the systems used to maintain the environment.

1.7 SCOPE OF WORK

a. Generalities: This section defines design parameters, material and software to be supplied and specifies technical characteristics.

b. This scope of work includes the integration into the existing control system.

c. Description: Works consist in supplying specifically, but not limited to, the following items:

(1) Modifying the existing control system programming

(2) Design and Fabrication of the motor Starters Cabinets (MSC):

Interface cabinets for motor control, installed by electrical (division 26), identified "MSC" on electrical drawings.

(3) The on-site configuration and start-up of the system to the Owner's requirements.

(4) Required coordination with the electrical contractor responsible for installation (division 26).

(5) Training sessions for the Users.

(6) The coordination of the connections of all inputs/outputs on the interface cabinets, the distributed control units the control computer and the sensors.

(7) Supply all required information for control wiring.

(8) All other items necessary or required for the purpose of these specifications.

1.8 WORKS PERTINENT TO OTHER SECTIONS

a. Wiring and Conduits for Power and Control: Supply and installation of wiring and conduits for Screenhouse loads (power) and control by Electrical (Division 26).

b. Wiring and Conduits for Sensor and Communication: Supply and installation of wiring and conduit for sensors and communication by Electrical (Division 26).

1.9 WARRANTY AND SERVICE

a. Local Service: Supply written attestation and the address of a LOCAL SERVICE CENTER that will be maintained with a complete stock of replacement parts capable of servicing any and all troubles in the system (software and hardware). Such local service center shall be within 300 miles and capable of responding within six (6) hours.

(1) In the case where no local service center is maintained, demonstrate to Owner's satisfaction the strategy allowing response within six (6) hours. Owner reserves the right to accept or not such demonstration.

1.10 CERTIFICATION

SECTION 25 50 01 Page 4

As a minimum, meet requirements of UL, where UL standards are established for those items, and requirements of NFPA 70 for all materials, equipment, and devices.

2.1 MOTORS STARTERS CABINET (MSC)

a. Provide Motor Starters Cabinets including schematic and wiring diagrams in accordance with UL 508A and UL 50. Provide Motors Starters Cabinet terminal wiring schedule.

b. The MSC cabinets shall be installed where indicated on drawings, with bottom at 4 foot 5 inches AFF for the screenhouses.

c. Enclosure

(1) Motor starters cabinets (MSC) to be constructed of 14 Ga. minimum thickness sheet steel with a finish equivalent to that obtained by cold rolling, reinforced with instruct, braced, stiffened and welded to form a rigid self-supporting assembly without warping, wrinkles or indentations.

(2) All seams and corners are filled by welding and ground smooth.

Surface of panel board is free from all defects.

(3) The finished panel board is flat within 1/16 in over the entire surface.

(4) Provide Drip hoods in compliance with sprinklered areas.

(5) Wall mounted panels have plates with holes drilled for bolting the panel to a wall and/or supporting & anchoring from the floor.

(6) Removable eye-bolts are provided for lifting and handling.

Lifting angle is of suitable size to prevent panel from buckling.

(7) Adequate space is provided for top and side entry of field conduits.

(8) All cut-outs are made without warping and with minimum clearance.

No holes or openings are shown from the front of the panel when the instrument or device is installed.

(9) No screws or bolts are used through the panel front face for mounting rear panel devices.

(10) Final dimensioning to be made by panel supplier, along with shop drawings, component list, and general layout.

(11) Back plates are constructed of 10 gauge minimum thickness steel sheet with a finish equivalent to that obtained by cold rolling, braced and/or formed as required for sufficient rigidity.

Enclosures are type NEMA 4X, UL listed.

d. Panel painting

(1) A minimum of one primer coat and three coats of low gloss finish paint will be applied to all external surfaces. Color to be White. All internal surfaces and sub-panel are primed and a minimum of one coat of glossy white applied. All coats including

SECTION 25 50 01 Page 5 primer are baked.

e. Wiring

(1) All panel wiring, is run in vented plastic wire ways. Wiring is neatly done and will conform to all applicable codes. Wire ways will be routed to give a neat appearance and unrestricted access to all devices. Wires not in wire ways will be neatly grouped, tied and secured to panel by means of removable plastic tie wrap clips.

(2) All 24 VAC wiring runs separate from 120 VAC wiring.

(3) General control wiring is 600 Volt, no. 16 AWG, stranded copper.

(4) Power wiring is indicated on schematic, 12 AWG min.

(5) Inlet and outlet wiring is connected directly to terminal blocks.

(6) All panel wiring will be made on one side of the block with the other side clear for field wiring terminations. There will be no more than two wires connected to each terminal point.

(7) No splicing of wires on electrical circuits is permitted.

(8) Soldered pin connections for multi-conductor cable connectors are individually insulated using shrinkable tubing.

(9) Terminal blocks for control circuits are rated 600 V; those utilized for low-voltage instrument signal circuits are rated 300 V. Individual terminals can be removed without disturbing adjacent ones and have test points.

(10) A power and safety ground copper bus is installed in each panel or each Section of the panel.

(11) Cover with an insulating plate, all pieces under tension of transformers and distribution buses and identify the voltage.

f. Identification

(1) All components of panels to be identified with engraved nameplates, laminated plastic, black with white core, with edges beveled and with engraved characters of minimum 1/8" height. All nameplates having the same character size.

(2) All wires are identified at both ends using engraved tubular marker and carry the same number.

(3) Following wire coding is proposed and shall match on all projects;

VOLTAGE Hot Neutral Ground 120 VAC Black White Green 208 VAC Black, Red, Blue White 24 VAC Yellow White 24 VDC Blue Blue

(4) Each terminal block row and each terminal on the terminal block is labeled with the appropriate wire identification number.

(5) Multi-conductor cables are identified at both ends with the proper cable number engraved on cable marker.

SECTION 25 50 01 Page 6

g. Components

(1) The following components are recommended for MSC cabinets.

(2) 120 Volts/208 Volts Motor Starters where not adjustable speed drive not provided

(a) Open type for DIN Rail mounting

(b) Size according to motor HP

(c) 24 VAC coil

(d) Number of poles indicated, electrically interlocked as indicated

(e) Spec IEC approved UL

(3) Thermal Overloads

(a) Thermal overloads to be installed close to the motor, in a manual starter used as a disconnect switch.

(4) Control relays (CR)

(a) 10 Amps contacts

(b) 24 VAC coil

(c) Complete with plug in base and din rail mounting

(5) Contactors

(a) Open type for DIN Rail mounting

(b) Size according to load

(c) 24 VAC coil

(d) UL listed

(6) Terminal Blocks

(a) Provide terminal quantity as required.

(7) Circuit Breakers 120 VAC

(a) DIN Rail mounting type

(b) Capacity indicated on drawings

(8) Circuit breakers 24 VAC

(a) DIN Rail mounting type

(b) Capacity indicated on drawings

(9) Wire ways

(a) Plastic wire ways

SECTION 25 50 01 Page 7

(b) C/W snap-in cover, light grey

(10) Main breaker

(a) Switch specially made for enclosures with a molded case

(b) Circuit breaker mounted in series

(11) Transformers 120/24 VAC

(a) Individual Class 2, 120/24 VAC transformers, maximum 100 VA

(b) Supply and install as many as required for the load of relays and coils

h. Fabrication

(1) Motor starters cabinets to manufactured and assembled in shop by a competent control panel manufacturer. MSC's shall be UL listed and manufactured per NFPA 70 requirements. Contractor to indicate in his tender the name of the manufacturer chosen, along with references of similar control panel's type realized in the last five years. Manufacturer shall be UL approved. A tag with a UL number shall be installed in the enclosure.

(2) The MSC's shall have only one source of power; multiple power sources feeding multiple relays will not be accepted and will be refused by local authorities.

i. Design information

(1) The manufacturer of the MSC cabinets shall use the information shown on drawings for typical MSC power and control wiring of each type of motor, valve, damper, and other components to power and control the equipment in the design. Each MSC cabinet shall have only one power source and multiple contactors in a cabinet.

Individually powered by an external distribution panel breaker are not acceptable.

(2) Loads and components shall be distributed as described on the MSC drawings for the various screenhouse and greenhouse components shown on the list of loads and control points on the drawings.

(3) Manufacturer of the MSC shall prepare a detailed power and control diagram of each MSC using standard ANSI Y32.2 symbols for approval.

(4) All breakers shall be sized for load as per latest edition of

NFPA 70.

(5) All reversing and dual speed contactors shall be mechanically interlocked.

SECTION 25 50 01 Page 8

PART 3 EXECUTION

3.1 MOTOR STARTER CABINETS (MSC)

Cabinets installation is by Division 26.

3.2 INPUTS/OUTPUTS

Verify the physical connection for all inputs/outputs made by Division 26, connect all communication wires and terminate fiber optics.

SECTION 26 20 00 Page 9

1.1 REFERENCES

SECTION 26 20 00

INTERIOR DISTRIBUTION SYSTEM

08/19, CHG 3: 11/21

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM B1 (2013) Standard Specification for Hard-Drawn Copper Wire

ASTM B8 (2011; R 2017) Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft

ASTM D709 (2017) Standard Specification for Laminated Thermosetting Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 81 (2012) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System

IEEE 100 (2000; Archived) The Authoritative Dictionary of IEEE Standards Terms

IEEE C2 (2017; Errata 1-2 2017; INT 1 2017) National Electrical Safety Code

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2021) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL CONTRACTORS ASSOCIATION (NECA)

NECA NEIS 1 (2015) Standard for Good Workmanship in Electrical Construction

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

ANSI C80.1 (2020) American National Standard for Electrical Rigid Steel Conduit (ERSC)

ANSI C80.3 (2020) American National Standard for Electrical Metallic Tubing (EMT)

NEMA 250 (2020) Enclosures for Electrical Equipment

SECTION 26 20 00 Page 10

(1000 Volts Maximum)

NEMA FU 1 (2012) Low Voltage Cartridge Fuses

NEMA ICS 1 (2000; R 2015) Standard for Industrial Control and Systems: General Requirements

NEMA ICS 2 (2000; R 2020) Industrial Control and Systems Controllers, Contactors, and Overload Relays Rated 600 V

NEMA ICS 4 (2015) Application Guideline for Terminal Blocks

NEMA ICS 6 (1993; R 2016) Industrial Control and Systems: Enclosures

NEMA KS 1 (2013) Enclosed and Miscellaneous Distribution Equipment Switches (600 V Maximum)

NEMA MG 1 (2018) Motors and Generators

NEMA MG 10 (2017) Energy Management Guide for Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors

NEMA MG 11 (1977; R 2012) Energy Management Guide for Selection and Use of Single Phase Motors

NEMA TC 2 (2020) Standard for Electrical Polyvinyl Chloride (PVC) Conduit

NEMA TC 3 (2021) Polyvinyl Chloride (PVC) Fittings for Use With Rigid PVC Conduit and Tubing

NEMA WD 1 (1999; R 2020) Standard for General Color Requirements for Wiring Devices

NEMA WD 6 (2016) Wiring Devices Dimensions Specifications

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2020; ERTA 20-1 2020; ERTA 20-2 2020; TIA

20-1; TIA 20-2; TIA 20-3; TIA 20-4)

National Electrical Code

NFPA 70E (2021) Standard for Electrical Safety in the Workplace

TELECOMMUNICATIONS INDUSTRY ASSOCIATION (TIA)

TIA-569 (2019e) Telecommunications Pathways and Spaces

SECTION 26 20 00 Page 11

TIA-607 (2019d) Generic Telecommunications Bonding and Grounding (Earthing) for Customer Premises

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910.147 The Control of Hazardous Energy (Lock Out/Tag Out)

29 CFR 1910.303 Electrical, General

UNDERWRITERS LABORATORIES (UL)

UL 6 (2007; Reprint Sep 2019) UL Standard for Safety Electrical Rigid Metal Conduit-Steel

UL 20 (2018; Reprint Jan 2021) UL Standard for Safety General-Use Snap Switches

UL 44 (2018; Reprint May 2021) UL Standard for Safety Thermoset-Insulated Wires and Cables

UL 50 (2015) UL Standard for Safety Enclosures for Electrical Equipment, Non-Environmental Considerations

UL 67 (2018;

Safety Reprint Jul 2020) UL Standard for Panelboards

UL 83 (2017;

Safety Cables

Reprint Mar 2020) UL Standard for Thermoplastic-Insulated Wires and

UL 248-4 (2010;

- Part

Reprint Apr 2019) Low-Voltage Fuses 4: Class CC Fuses

UL 248-8 (2011;

- Part

Reprint Aug 2020) Low-Voltage Fuses 8: Class J Fuses

UL 248-10 (2011;

- Part

Reprint Aug 2020) Low-Voltage Fuses 10: Class L Fuses

UL 248-12 (2011;

- Part

Reprint Aug 2020) Low Voltage Fuses 12: Class R Fuses

UL 248-15 (2018)

T Fuses

Low-Voltage Fuses - Part 15: Class

UL 360 (2013;

Safety

Reprint Aug 2021) UL Standard for Liquid-Tight Flexible Metal Conduit

UL 467 (2013;

Safety

Reprint Jun 2017) UL Standard for Grounding and Bonding Equipment

UL 486A-486B (2018;

Safety

Reprint May 2021) UL Standard for Wire Connectors

UL 486C (2018; Reprint May 2021) UL Standard for

SECTION 26 20 00 Page 12

Safety Splicing Wire Connectors

UL 489 (2016; Rev 2019) UL Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 498 (2017; Reprint Feb 2021) UL Standard for Safety Attachment Plugs and Receptacles

UL 506 (2017) UL Standard for Safety Specialty Transformers

UL 508 (2018; Reprint Jul 2021) UL Standard for Safety Industrial Control Equipment

UL 510 (2020) UL Standard for Safety Polyvinyl Chloride, Polyethylene and Rubber Insulating Tape

UL 514A (2013; Reprint Aug 2017) UL Standard for Safety Metallic Outlet Boxes

UL 514B (2012; Reprint May 2020) Conduit, Tubing and Cable Fittings

UL 514C (2014; Reprint Feb 2020) UL Standard for Safety Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers

UL 651 (2011; Reprint Mar 2020) UL Standard for Safety Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings

UL 797 (2007; Reprint Mar 2021) UL Standard for Safety Electrical Metallic Tubing -- Steel

UL 817 (2015; Reprint Jul 2021) UL Standard for Safety Cord Sets and Power-Supply Cords

UL 943 (2016; Reprint Feb 2018) UL Standard for Safety Ground-Fault Circuit-Interrupters

UL 984 (1996; Reprint Sep 2005) Hermetic Refrigerant Motor-Compressors

UL 1063 (2017) UL Standard for Safety Machine-Tool Wires and Cables

UL 1449 (2021) UL Standard for Safety Surge Protective Devices

UL 2043 (2013) Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces

UL 4248-1 (2017) UL Standard for Safety Fuseholders

- Part 1: General Requirements

SECTION 26 20 00 Page 13

UL 4248-12 (2018) UL Standard for Safety Fuseholders

- Part 12: Class R

1.2 DEFINITIONS

Unless otherwise specified or indicated, electrical and electronics terms used in these specifications, and on the drawings, are as defined in

IEEE 100.

1.3 QUALITY ASSURANCE

1.3.1 Regulatory Requirements

In each of the publications referred to herein, consider the advisory provisions to be mandatory, as though the word, "must" had been substituted for "should" wherever it appears. Interpret references in these publications to the "authority having jurisdiction," or words of similar meaning, to mean the Contracting Officer. Provide equipment, materials, installation, and workmanship in accordance with NFPA 70 unless more stringent requirements are specified or indicated. NECA NEIS 1 shall be considered the minimum standard for workmanship.

1.3.2 Standard Products

Provide materials and equipment that are products of manufacturers regularly engaged in the production of such products which are of equal material, design and workmanship and:

a. Have been in satisfactory commercial or industrial use for 2 years prior to bid opening including applications of equipment and materials under similar circumstances and of similar size.

b. Have been on sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 2-year period.

c. Where two or more items of the same class of equipment are required, provide products of a single manufacturer; however, the component parts of the item need not be the products of the same manufacturer unless stated in this section.

1.3.2.1 Alternative Qualifications

Products having less than a 2-year field service record will be acceptable if a certified record of satisfactory field operation for not less than 6,000 hours, exclusive of the manufacturers' factory or laboratory tests, is furnished.

1.3.2.2 Material and Equipment Manufacturing Date

Products manufactured more than 3 years prior to date of delivery to site are not acceptable.

1.4 WARRANTY

Provide equipment items supported by service organizations that are reasonably convenient to the equipment installation in order to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

SECTION 26 20 00 Page 14

2.1 MATERIALS AND EQUIPMENT

As a minimum, meet requirements of UL, where UL standards are established for those items, and requirements of NFPA 70 for all materials, equipment, and devices.

Sulfur evaporators are used with-in all greenhouse and screenhouse spaces in this project. Airborne sulfur can react with materials commonly used in electrical construction (copper, silver, etc.,) and cause corrosion.

All electrical equipment and devices must be rated for the environment.

2.2 CONDUIT AND FITTINGS

Conform to the following:

2.2.1 Rigid Metallic Conduit

2.2.1.1 Rigid, Threaded Zinc-Coated Steel Conduit

ANSI C80.1, UL 6.

2.2.2 Rigid Nonmetallic Conduit

PVC Type EPC-40 and EPC-80 in accordance with NEMA TC 2, UL 651.

2.2.3 Electrical, Zinc-Coated Steel Metallic Tubing (EMT)

UL 797, ANSI C80.3.

2.2.4 Flexible Metal Conduit

2.2.4.1 Liquid-Tight Flexible Metal Conduit, Steel

UL 360, limited to 6 feet.

2.2.5 Fittings for Metal Conduit, EMT, and Flexible Metal Conduit

UL 514B. Ferrous fittings: Cadmium- or zinc-coated in accordance with

UL 514B.

2.2.5.1 Fittings for Rigid Metal Conduit and IMC

Threaded-type. Split couplings unacceptable.

2.2.5.2 Fittings for EMT

Steel compression type.

2.2.6 Fittings for Rigid Nonmetallic Conduit

NEMA TC 3 for PVC and UL 514B.

2.3 OPEN TELECOMMUNICATIONS CABLE SUPPORT

2.3.1 Closed Ring Cable Supports

Provide closed ring cable supports in accordance with UL 2043. Provide closed ring cable supports as indicated.

2.4 OUTLET BOXES AND COVERS

SECTION 26 20 00 Page 15

UL 514A, cadmium- or zinc-coated, if ferrous metal. UL 514C, if nonmetallic.

2.5 CABINETS, JUNCTION BOXES, AND PULL BOXES

UL 50; volume greater than 100 cubic inches, NEMA Type 1 enclosure; sheet steel, hot-dip, zinc-coated. Where exposed to wet, damp, or corrosive environments, NEMA Type as indicated.

2.6 WIRES AND CABLES

Provide wires and cables in accordance applicable requirements of NFPA 70 and UL for type of insulation, jacket, and conductor specified or indicated. Do not use wires and cables manufactured more than 12 months prior to date of delivery to site.

2.6.1 Conductors

Provide the following:

a. Conductor sizes and capacities shown are based on copper, unless indicated otherwise.

b. Conductors No. 12 AWG and larger diameter: Stranded.

c. Conductors No. 14 AWG and smaller diameter: Solid.

d. Conductors for remote control, alarm, and signal circuits, classes 1, 2, and 3: Stranded unless specifically indicated otherwise.

e. All conductors: Copper and protected from corrosion where insulation is stripped.

2.6.1.1 Minimum Conductor Sizes

Provide minimum conductor size in accordance with the following:

a. Branch circuits: No. 12 AWG.

b. Class 1 remote-control and signal circuits: No. 14 AWG.

2.6.2 Color Coding

Provide color coding for service, feeder, branch, control, and signaling circuit conductors.

2.6.2.1 Ground and Neutral Conductors

Provide color coding of ground and neutral conductors as follows:

a. Grounding conductors: Green.

b. Neutral conductors: White.

c. Exception, where neutrals of more than one system are installed in same raceway or box, other neutrals color coding: White with a different colored (not green) stripe for each.

2.6.3 Insulation

Unless specified or indicated otherwise or required by NFPA 70, provide

SECTION 26 20 00 Page 16 power and lighting wires rated for 600-volts, Type THWN/THHN conforming to UL 83, except that grounding wire may be type TW conforming to UL 83;

remote-control and signal circuits: Type TW or TF, conforming to UL 83.

Where equipment or devices require 90-degree Centigrade (C) conductors, provide only conductors with 90-degree C insulation or better.

2.6.4 Bonding Conductors

ASTM B1, solid bare copper wire for sizes No. 8 AWG and smaller diameter;

ASTM B8, Class B, stranded bare copper wire for sizes No. 6 AWG and larger diameter.

2.6.5 Cord Sets and Power-Supply Cords

UL 817.

2.7 SPLICES AND TERMINATION COMPONENTS

UL 486A-486B for wire connectors and UL 510 for insulating tapes.

Connectors for No. 10 AWG and smaller diameter wires: Insulated, pressure-type in accordance with UL 486A-486B or UL 486C (twist-on splicing connector). Provide solderless terminal lugs on stranded conductors.

2.8 DEVICE PLATES

Provide the following:

a. UL listed, one-piece device plates for outlets to suit the devices installed.

b. Plates on finished walls: Satin finish stainless steel, minimum 0.03 inch thick.

c. Screws: Machine-type with countersunk heads in color to match finish of plate.

d. Sectional type device plates are not be permitted.

e. Plates installed in wet locations: Gasketed and UL listed for "wet locations."

2.9 SWITCHES

2.9.1 Toggle Switches

NEMA WD 1, UL 20, single pole, double pole, three-way, and four-way, totally enclosed with bodies of thermoplastic or thermoset plastic and mounting strap with grounding screw. Include the following:

a. Handles: White thermoplastic.

b. Wiring terminals: Screw-type, side-wired.

c. Contacts: Corrosion resistant.

d. Switches: Rated quiet-type ac only, 120/277 volts, with current rating and number of poles indicated.

2.9.2 Disconnect Switches

NEMA KS 1. Provide heavy duty-type switches where indicated, where

SECTION 26 20 00 Page 17 switches are rated higher than 240 volts, and for double-throw switches.

Utilize Class R fuseholders and fuses for fused switches, unless indicated otherwise. Provide horsepower rated for switches serving as the motor-disconnect means. Provide switches in NEMA 4X Type 304 stainless steel, enclosure as indicated per NEMA ICS 6.

2.10 FUSES

NEMA FU 1. Provide complete set of fuses for each fusible switch.

Coordinate time-current characteristics curves of fuses serving motors or connected in series with circuit breakers for proper operation. Submit coordination data for approval. Provide fuses with a voltage rating not less than circuit voltage.

2.10.1 Fuseholders

Provide in accordance with UL 4248-1.

2.10.2 Cartridge Fuses, Current Limiting Type (Class R)

UL 248-12, Class RK-1. Provide only Class R associated fuseholders in accordance with UL 4248-12.

2.10.3 Cartridge Fuses, High-Interrupting Capacity, Current Limiting Type (Classes J, L, and CC)

UL 248-8, UL 248-10, UL 248-4, Class J for zero to 600 amperes, Class L for 601 to 6,000 amperes, and Class CC for zero to 30 amperes.

2.10.4 Cartridge Fuses, Current Limiting Type (Class T)

UL 248-15, Class T for zero to 1,200 amperes, 300 volts; and zero to 800 amperes, 600 volts.

2.11 RECEPTACLES

Provide the following:

a. UL 498, general purpose specification grade, grounding-type.

Residential grade receptacles are not acceptable.

b. Ratings and configurations: As indicated.

c. Bodies: White as per NEMA WD 1.

d. Face and body: Thermoplastic supported on a metal mounting strap.

e. Dimensional requirements: Per NEMA WD 6.

f. Screw-type, side-wired wiring terminals.

g. Grounding pole connected to mounting strap.

h. The receptacle: Containing triple-wipe power contacts and double or triple-wipe ground contacts.

2.11.1 Weatherproof Receptacles

Provide receptacles, UL listed for use in "wet locations". Include cast metal box with gasketed, hinged, and weatherproof while-in-use, polycarbonate, UV resistant/stabilized cover plate.

SECTION 26 20 00 Page 18

2.11.2 Special Purpose Receptacles

Receptacles serving sulfur evaporators and HAFs are special purpose NEMA 5 configuration, rated 20 amperes, 120 volts.

2.11.3 Tamper-Resistant Receptacles

Provide duplex receptacle with mechanical sliding shutters that prevent the insertion of small objects into its contact slots.

2.12 PANELBOARDS

Provide panelboards in accordance with the following:

a. UL 67 and UL 50 having a short-circuit current rating as indicated.

b. Panelboards: Circuit breaker-equipped.

c. Designed such that individual breakers can be removed without disturbing…