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01 SOW 010000-General Requirements 331311.pdf

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Electric Heaters HTR B002-0SP-R1

SECTION 010000 – GENERAL REQUIREMENTS FOR SECTOR-20 LASER BUILDING HEATING UPGRADE PROJECT HEATERS

PART 1 - GENERAL

The following specification outlines the requirements for the sector-20 laser building heating upgrade installing two electric
heaters into existing Air Handling Unit AHU-1

LOCATION & ATTACHMENT:

SCOPE OF WORK:

SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, San Mateo County, California

Base Bid – Electric Heaters (quantity = 2)

The scope of this project is to provide all materials and labor to manufacture and deliver Electric Heaters

TECHNICAL SPECIFICATION:

• Heater with Control Option, SCR Control, Remote Control Panel, Three Phase

• Number Of Heating Elements & Materials: 2 (Two), Steel tube with steel fins

• Heating Element Capacity: 32KW-Modulating and 18KW- ON/OFF (1-10V)

• Heater Dimension: 54”W x 34”H x 6”D

• Control Box Dimension: 7”D x 33”H x 8”W

• Flow Rate: 10,000 CFM at 831 FPM

• Total Capacity: 50KW

• Power Supply: 480V/3P , 60.14A

• Control Voltage: 24V

• Control Signal: Modulating and 0-10V

CONTROL PANEL:

• Automatic Thermal Cutout

• Control Box Flush Bottom and Flush Top

• Control Box with left ext.

• Magnetic Contactor

• Cold Spot on Control Box Side

• Control Fuse

• Full Break Contactor

• Controller

• Manual Thermal Cutout

• Control Panel NEMA-4

• Disconnect Switch (Part of the control panel or remote mount, 30A & 60A for each heater, lockable for LOTO)

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Electric Heaters HTR B002-0SP-R1

• P.D Switch – Fixed

• Remote Panel NEMA-4 (quantity = 2)

• Stainless Steel Control Box

• SCR Controller

• Stage Fuse

• Transformer

• UL Certified

1.2 SCHEDULE (Total 2 Heaters):

• On Site Delivery before Dec 12, 2022

1.3 SUBMITTALS

• Warranty = 12 Months (after unit arrive on SLAC shipping and receiving)

Manufacturing may start immediately after NTP has been signed and issued to manufacturer

• Product Data: Submit manufacturer’s product data for duct heaters showing an electrical connection diagram

dimensions, capacities, ratings, performance characteristics, control type, and accessories

• Record Documents: Manufacturers wiring diagrams detailing electrical connections to duct heater for power, signal,
and control systems wiring, differentiating clearly between manufacturer-installed wiring and field-installed wiring.

1.4 QUALITY ASSURANCE

• Manufacturer Qualifications: Firms regularly engaged in manufacture of electric duct heaters, of types and sizes

required, whose products have been in satisfactory use in similar service for not less than three (3) years.

1.5 CODES, STANDARDS AND SAFETY:

All materials, installation and workmanship shall comply with the applicable requirements and standards addressed within
the following references:

• National Fire Protection Association (NFPA) 70, National Electrical Code

• UL - Testing Agency Listing and Labeling: Assembly shall be listed to UL standard 1996 and approved for installation

with zero clearance to combustibles. Heater shall bear UL labels.

• Heating elements: All heating elements shall be made of [N60] or [80/20] nickel/chromium resistance wire with ends
terminated by means of staking and Heliarc welding to machine screws. Heating element support structure shall
consist of [galvanized steel] or [stainless steel] wire formed around ceramic insulators that fully encircle and support
the heating element.

• Provide only UL listed electrical components.

• Over-temperature protection: Duct heater shall be supplied with primary automatically resetting and secondary

manually reset thermal cutout devices. These devices must function independently to prohibit the heater’s operation if
either one is activated. A disconnecting magnetic contactor circuit is required. All safety components must be
serviceable through the control cabinet access panel without the need to remove the heater from the duct.

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Electric Heaters HTR B002-0SP-R1

• Over-current protection: Duct heaters rated at more than 48 amps shall be supplied with factory-installed fusing.

Heating elements shall be subdivided and fused accordingly.

• All wiring component sizing, component spacing and protective devices within the control cabinet shall be factory
installed and comply with NEC and UL standards. All heaters shall function properly with a 50 or 60 Hz power
supply.

• Power and control conductors shall be terminated in factory installed and labeled terminal blocks.

• A wiring diagram depicting the layout and connection points of all electrical components shall be affixed to the inside

of the control cabinet cover.

• A rating label stating model number, serial number, volts, amps, phase, frequency, control volts, volt-amps and

minimum airflow requirements shall be affixed to the interior and exterior of the control cabinet cover.

1.6 DELIVERY, STORAGE, AND HANDLING

• Delivery: Deliver, store, protect, and handle products to the project site

• Storage: Store materials in a clean dry area indoor, protected from damage.

• Handling: Handle carefully to avoid damage to components, enclosures, and finish.

1.7 FINAL ACCEPTANCE

• Notice that the electric heaters are ready for final inspection and acceptance shall consist of a written notice issued to
the Construction Manager by Subcontractor stating that Subcontractor has carefully inspected all portions of the
work, has reviewed in detail the drawings and specifications and, that to the best of Subcontractor's knowledge, all
conditions of the Subcontract documents have been fulfilled.

• Upon receipt of this notice, the Subcontract Administrator, the Project Manager, the Project Engineer, the

Construction Manager, the SLAC Building Official and Subcontractor shall make a joint inspection of the heaters.
After deficiencies, if any, have been corrected or accounted for, the Notice of Completion and Acceptance will be
issued to manufacturer.

END OF SECTION 010000

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