HomeMy WebLinkAbout238201 ELECTRIC TERMINAL UNITSTHE KENT
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SECTION 23 82 01 - ELECTRICAL TERMINAL UNITS
PART 1 - GENERAL
1.01 RELATED SECTIONS:
A. Drawings, general provisions of the Contract, including General and Supplementary
Conditions, and Division-1 Specification Sections and Division 20 Specification Sections, apply
to work of this Section.
1.02 DESCRIPTION OF WORK:
A. Extent of electric terminal unit work is indicated by drawings and schedules, and by
requirements of this Section.
B. Types of electric terminal units required for project include the following:
1. Architectural Wall Heaters
2. Electric Unit Heaters
C. Refer to Division 26 Sections for the following work not work of this Section.
1. Power supply wiring from power source to power connection on terminal unit. Include
starters, disconnects, and required electrical devices, except where specified as
furnished, or factory-installed, by manufacturer.
2. Interlock wiring between electrically-operated terminal units; and between terminal
units and field-installed control devices.
3. Interlock wiring specified as factory-installed is work of this Section.
D. Provide the following electrical work as work of this Section, complying with requirements of
Division 26 Sections:
1. Control wiring: between field-installed controls, indicating devices, and terminal unit
control panels.
2. Control wiring specified as work of Division 23 for Automatic Temperature Controls is
work of that Section.
1.03 QUALITY ASSURANCE:
A. Codes and Standards:
1. UL Compliance: Provide electrical components for terminal units which have been
listed and labeled by UL.
1.04 SUBMITTALS:
A. Product Data: Submit manufacturer's specifications for terminal units showing dimensions,
capacities, ratings, performance characteristics, gages and finishes of materials, and
installation instructions.
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B. Shop Drawings: Submit assembly-type shop drawings showing unit dimensions, construction
details, and field connection details.
C. Wiring Diagrams: Submit manufacturer's electrical requirements for power supply wiring to
terminal units. Submit manufacturer's ladder-type wiring diagrams for interlock and control
wiring. Clearly differentiate between portions of wiring that are factory-installed and portions to
be field- installed.
D. Samples: Submit 3 samples of each type of cabinet finish furnished.
E. Maintenance Data: Submit maintenance instructions, and spare parts lists. Include this data,
product data, and shop drawings in maintenance manuals: in accordance with requirements of
Division 1.
1.05 DELIVERY, STORAGE, AND HANDLING:
A. Handle terminal units and components carefully to prevent damage, breaking, denting and
scoring.
B. Do not install damaged terminal units or components; replace with new.
C. Store terminal units and components in clean dry place. Protect from weather, dirt, fumes,
water, construction debris, and physical damage.
D. Comply with Manufacturer's rigging and installation instructions for unloading terminal units,
and moving them to final location.
PART 2 - PRODUCTS
2.01 ARCHITECTURAL WALL HEATERS:
A. Manufacturer: Subject to compliance with requirements, provide baseboard radiation of one of
the following:
1. Chromolox
2. Electromode
3. Markel
4. Raywall
5. Q-Mark
B. General: Provide Architectural heavy duty wall heaters in locations as indicated, and of
capacities, style, and having accessories as scheduled.
C. Unit shall be tamper-resistant.
D. Heating element shall be steel finned metal sheath type with low sheath temperatures to
provide uniform heating and long life.
E. Provide integral thermostat and overheat protection.
F. Provide built-in fan delay switch and power disconnect switch
G. Provide permanently lubricated totally enclosed fan motor
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H. Provide heavy duty 16 gauge steel bar grille with baked enamel finish.
2.02 ELECTRIC UNIT HEATERS:
A. Manufacturer: Subject to compliance with requirements, provide unit heaters of one of the
following:
1. Brasch
2. Chromolox
3. Electromode
4. Indeeco
5. Markel
6. Q-Mark
7. Raywall
8. Trane
B. General: Provide electric unit heaters of capacity, style, and having accessories as scheduled.
C. Casing: Casings shall be fabricated of die-formed heavy-gauge steel and finished in high
gloss, baked enamel. Supply air shall be drawn and discharged through an outward drawn
venturi. Adjustable discharge louvers shall be provided to control the direction of airflow.
D. A large hinged access door shall extend the width of the heater and be locked in position by
quarter-turn fasteners. Heater and supply wiring diagram shall be permanently attached to the
inside of me access door.
E. Elements: Elements shall be high mass, all steel, tubular finned type.
F. Motors: Motor shall be totally enclosed, all angle industrial rated. All units 3.0 through 20 kw
will utilize sealed bearings to ensure permanent lubrication.
G. Fan Blades: Fan blades shall be of the axial now-type designed for quiet, efficient operation.
Fan speed shall not exceed 1,600 rpm.
H. Wiring: Heaters shall be designed for a single circuit, with elements, motor, and control circuits
subdivided with factory fuses to conform to the National Electric Code and Underwriter's
Laboratory, Inc. Standard 1025. All three-phase heaters shall have balanced phases.
I. Thermal Overload Protection: All heaters shall be equipped with automatic reset thermal
overloads which shutdown the element and motor if safe operating temperatures are
exceeded.
J. Controls: Contactors and control circuit transformers, where required, shall be factory installed
and wired. Only direct-line supply and thermostat connections are field wired.
K. Built-in fan override shall be provided to purge unit casing of excess heat after unit shutdown.
The units shall be listed under the Re-examination Service of Underwriters' Laboratories. Inc.
Units shall be warranted to be free from defective material and workmanship for a period of
one year with the exception of the heating elements which shall be warranted for 5 years.
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L. Control Options:
1. Power disconnects supplied for field installation where applicable shall disconnect all
ungrounded connectors in the 'Off" position.
2. Thermostats shall be wall mounted and shall be heavy-duty hydraulic actuating type.
Thermostat range shall be 45 F to 90 F.
PART 3 - EXECUTION
3.01 INSPECTION:
A. Examine areas and conditions under which terminal units are to be installed. Do not proceed
with work until unsatisfactory conditions have been corrected in manner acceptable to installer.
3.02 INSTALLATION OF ARCHITECTURAL WALL HEATERS:
A. General: Install wall heaters in accordance with manufacturer’s installation instructions and the
requirements of the National Electrical Code.
3.03 INSTALLATION OF ELECTRIC UNIT HEATERS:
A. General: Install unit heaters as indicated, and in accordance with manufacturer's installation
instructions.
B. Uncrate units and inspect for damage. Verify that nameplate data corresponds with unit
designation.
C. Hang units from building substrate. Mount as high as possible to maintain greatest headroom
possible unless otherwise indicated.
D. Support units with rod-type hangers anchored to building substrate.
E. Protect units with protective covers during balance of construction.
3.04 ELECTRICAL WIRING:
A. General: Install electrical devices furnished by manufacturer but not specified to be factory-
mounted.
B. Furnish copy of manufacturer's wiring diagram submittal to Electrical Installer.
C. Verify that electrical wiring installation is in accordance with manufacturer's submittal and
installation requirements of Division 26 Sections. Do not proceed with equipment start-up until
wiring installation is acceptable to equipment installer.
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3.05 ADJUSTING AND CLEANING:
A. General: After construction is completed, including painting, clean unit exposed surfaces,
vacuum-clean terminal coils and inside of cabinets.
B. Retouch any marred or scratched surfaces with factory-finish using finish materials furnished
by the manufacturer.
END OF SECTION
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