SECTION 08341

OVERHEAD COILING GRILLES

PART 1 GENERAL

SECTION INCLUDES

Coiling metal grilles and operating hardware; [manual] [electric] operation.

[Wiring from electric circuit disconnect to grille operator to control station.]

RELATED SECTIONS

Section [______-____________]: [Support framing] [Framed opening].

Section 06200 - Finish Carpentry: Wood jamb and head trim.

Section 08331 - Overhead Coiling Doors.

Section 08712 - Grille Hardware: Cylinder core and keys.

Section [______-____________]: Conduit from electric circuit to [door] [shutter] operator and from [door] [shutter] operator to control station.

Section 16180 - Equipment Wiring Systems.

Section [______-____________]:	Power to disconnect.

REFERENCES

ANSI/ASTM B221 - Aluminum-Alloy Extruded Bar, Rod, Wire, Shape, and Tube.

ANSI/UL 325 - Grille, Drapery, Gate, Louver, and Window Operators and Systems.

NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum).

NEMA ICS 2 - Standards for Industrial Control Devices, Controllers and Assemblies.

NEMA MG1 - Motors and Generators.

UL - Underwriters' Laboratories Inc.

SYSTEM DESCRIPTION

Manual unit with overhead counter balance device.

****** [OR] ******

Electric motor operated unit with manual override in case of power failure.

[Within a framed opening.] [Surface mounted.]

SUBMITTALS

Submit under provisions of Section [01300] [________].

Shop Drawings: Indicate pertinent dimensioning, anchorage methods, hardware locations, and installation details.

Product Data: Provide general construction, details of grillage, component connections and details, [electrical equipment,] and [________________].

Samples:	Submit [two] [_______] grille members, [____x____] inch ([____x____] mm) in size illustrating shape, color and finish texture.

Manufacturer's Installation Instructions: Indicate install sequence and procedures, adjustment and alignment procedures, and [________________].

MAINTENANCE DATA

Submit under provisions of Section [01700] [________].

Maintenance Data: Lubrication requirements and frequency, periodic adjustments required, and [________________].

REGULATORY REQUIREMENTS

Provide certificate of compliance from [authority having jurisdiction [________________] indicating approval of electric operating hardware.

[Electrical Components: UL listed.]

FIELD MEASUREMENTS

Verify that field measurements are as [indicated [on shop drawings]] [instructed by the manufacturer].

COORDINATION

Coordinate work under provisions of Section [01039] [________].

Coordinate the work with installation of electric power, locations and size of conduit, and [________________].

PART 2 PRODUCTS

MANUFACTURERS

[__________________________________] Model [_________].

[__________________________________] Model [_________].

[__________________________________] Model [_________].

Substitutions: Under provisions of Section [01600] [________].

MATERIALS

Grille: Conforming to the following:

Material: [Aluminum conforming to ASTM B221] [Galvanized steel] [Stainless steel] [Bronze].

Sizes: Fabricated of [5/16] [____] inch ([8] [____] mm) diameter horizontal members spaced at [1 1/2] [3 1/4] [____] inch ([38] [81] [____] mm) oc; [1/2] [____] inch ([13] [____] mm) diameter tube spacers for carrier rods spaced at [3 1/4] [____] inch ([81] [____] mm) oc.

Vertical Connecting Members:	[5/16] [____] inch ([8] [____] mm) diameter [5/8 x 1/8] [________] inch ([16 x 3] [________] mm) flat bar] [________________]; links spaced at [6] [9] [____] inch ([150] [225] [____] mm) oc.

Ends: Members with [nylon] [wood pile] runners for quiet operation; bottom bar of back-to-back angles [with tubular resilient cushion].

Guides: [Extruded aluminum] [Formed steel] [Stainless steel] [Bronze] angles, of profile to retain grille in place [with snap-on trim], mounting brackets of same metal.

Roller Shaft Counterbalance:	Steel pipe and [helical] steel spring system, capable of producing torque sufficient to assure smooth operation of grille from any position; with adjustable spring tension.

Hood Enclosure: [____] gage ([____] mm thick) [galvanized steel] [aluminum] [________]; internally reinforced to maintain rigidity and shape.

Hardware: Specified in Section 08712.

****** [OR] ******

Hardware:

Cylinders: [________________] type; grilles keyed [differently] [alike] [master keyed].

Handle: Inside [center] [side] mounted, adjustable keeper, spring activated latch bar with feature to keep in locked or retracted position; interior [and

exterior] handle.

ELECTRIC OPERATOR

Electric Operator:

Description: ANSI/UL 325, [side] [center] mounted.

Motor Enclosure:	NEMA MG1 Type [1] [4] [____]; [open drip proof] [TEFC] [________].

Motor Rating: [1/3] [1/2] [3/4] [____] hp ([250] [375] [560] W); continuous duty.

Motor Voltage: [____] volt, [single] [three] phase, 60 Hz.

Motor Controller: NEMA ICS 2, full voltage, reversing magnetic motor starter.

Controller Enclosure: NEMA 250 Type [1] [4] [____].

[Door] [Shutter] Speed: [12] [____] inches per second ([300] [____] mm/s)

Brake: Adjustable friction clutch type, activated by motor controller.

Control Station:	Standard three button (open-close-stop) control for each operator; [24] [____] volt circuit; [surface mounted] [________________].

Safety Edge:	Located at [door] [shutter] bottom, full width, [electro-mechanical] [pneumatic] sensitized type, wired to [stop] [reverse] [door] [shutter] upon striking object, hollow [neoprene] [rubber] covered [weather] seal.

FINISHES

Grille Components:	Galvanized steel.

****** [OR] ******

Grille Components: Stainless steel with No. [4] [____] finish.

****** [OR] ******

Grille Components: Anodized aluminum of [________] color [as selected].

****** [OR] ******

Grille Components: Bronze of [________] finish [as selected].

Guides and Hood Enclosure: [Prefinished] [Prime paint] [Prepare for paint finish] [________________].

PART 3 EXECUTION

EXAMINATION

Verify openings under provisions of Section [01039] [________].

Verify that opening sizes, tolerances and conditions are acceptable.

INSTALLATION

Install grille unit assembly in accordance with manufacturer's instructions.

Use anchorage devices to securely fasten assembly to wall construction and building framing without distortion or stress.

Securely brace components suspended from structure. [Secure guides to structural members only.]

Fit and align assembly including hardware; level and plumb, to provide smooth operation.

[Coordinate installation of electrical service with Section [16180] [________]. Complete wiring from disconnect to unit components.]

Coordinate installation of sealants and backing materials at frame perimeter as specified in Section 07900.

Install perimeter trim and [closures] [___________].

ERECTION TOLERANCES

Maintain dimensional tolerances and alignment with adjacent work.

Maximum Variation From Plumb: [1/16] [___] inch ([1.5] [___] mm).

Maximum Variation From Level: [1/16] [___] inch ([1.5] [___] mm).

Longitudinal or Diagonal Warp: Plus or minus [1/8] [____] inch per 10 ft ([3] [__] mm per 3 m) straight edge.

ADJUSTING

Adjust work under provisions of Section [01700] [________].

Adjust grille, hardware and operating assemblies.

CLEANING

Clean work under provisions of [01700] [________].

Clean grille and components.

Remove labels and visible markings.

SCHEDULES

Grille 178 to Servery: Size noted on Drawings, aluminum rail, medium bronze anodized, manually operated.

Grille 215 to Tool Crib:	48 inches wide x 36 inches high, steel rod galvanized, electrically operated.

END OF SECTION