SECTION 15840

INDUCTION UNITS

PART 1 GENERAL

SECTION INCLUDES

Induction Units.

Unit Enclosure.

RELATED SECTIONS

Section 15515 - Hydronic Specialties: Radiator Valves.

Section 15890 - Ductwork: Duct Connections.

Section 15973 - Pneumatic Control System: Unit Controls.

SUBMITTALS

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

Shop Drawings: Indicate cross section of enclosures, grilles, bracing and reinforcing, typical elevations, including schedule of units and enclosure, corner pieces, end caps, cap strips, access doors, and engineering data, on [room by room] [exposure] basis.

Product Data: Provide typical catalog information including arrangement, configuration, and capacities.

Manufacturer's Installation Instructions: Indicate mounting techniques, assembly, and connections.

PROJECT RECORD DOCUMENTS

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

Accurately record actual locations of valving and access doors.

OPERATION AND MAINTENANCE DATA

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

Include manufacturers' descriptive literature, operating, balancing, and cleaning instructions, disassembly and parts listing.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum [three] [_____] years [documented] experience.

MOCK-UP

Provide mock-up of one typical bay, under window installation including induction units and enclosure under provisions of Section [01400.] [_____.]

Mock-up may [not] remain as part of the Work.

PART 2 PRODUCTS

MANUFACTURERS

[____________________________]	Product [______________.]

[____________________________]	Product [______________.]

[____________________________]	Product [______________.]

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

INDUCTION UNITS

Configuration: [Low vertical] [Vertical] unit, primary air plenum with primary air inlet, air balancing damper, [multi-stage] nozzles, [primary air reheat coil,] secondary air inlet, [secondary cooling coil and galvanized drain pan,] [secondary heating coil,] and discharge stack.

Primary Air Plenum: Constructed of [21 gage (0.85 mm)] [24 gage (0.6 mm)] galvanized steel, insulated with [1/2 inch (13 mm)] [3/8 inch (10 mm)] thick, [2-1/2 lb/cu ft (40 kg/cu m)] [4 lb/cu ft (64 kg/cu m)] density neoprene coated glass fiber insulation.

Nozzles: [Multi-stage in vertical strips] molded from heat resistant thermo-plastic material (polypropylene) for operating temperatures of 20 to 200 degrees F (minus 29 to 93 degrees C) at pressures up to 3.5 inches wg (0.88 kPa) sealed and locked mechanically to frame.

Damper: Internal multiple orifice design, full length of plenum.

Coils: One or two rows, copper tubes mechanically bonded to aluminum fins, for 300 psig (2 070 kPa) maximum working pressure, tested to 450 psig (3 100 kPa).

Drain Pan: Galvanized steel secured to coil with drain connection for 5/8 inch (16 mm) O.D. copper tube or 3/4 inch (19 mm) I.D. plastic tube.

Finish: Paint internal parts, visible through enclosure, flat back.

Accessories:

Lint Screen: Single ply corrugated aluminum with 1/4 inch thick (6 mm) aluminum frame.

Wall Mounting Strips: Galvanized steel, 14 gage (1.8

mm), 6 inches (150 mm) in length.

Integral Pipe Chase: Two 14 gage (1.8 mm) Z-bar hangers, 6 inches (150 mm) long one at each end of unit.

Performance:

Overall Performance: Providing [_____] Btu/hr ([_____] sensible cooling, [_____] Btu/hr ([_____] W) total cooling, [_____] degrees F ([_____] degrees C) room design temperature.

Primary Air: [_____]cfm ([_____] L/sec) at [_____] degrees F ([_____] degrees C), with nozzle series [_____] at [_____] inches wg ([_____] kPa) static pressure.

Reheat Coil: [_____] Btu/hr ([_____] W) heating, with [_____] gpm ([_____] L/sec) heating water at [_____] degrees F ([_____] degrees C).

Secondary Cooling Coil: [_____] Btu/hr ([_____] W) cooling, with [_____] gpm ([_____] L/sec) cooling water at [_____] degrees F ([_____] degrees C).

Secondary Heating Coil: [_____] Btu/hr ([_____] W) heating, with [_____] gpm ([_____] L/sec) heating water at [_____] degrees F ([_____] degrees C).

Gravity Heating Capacity: [_____] Btu/hr ([_____] W) heating, with [_____] gpm ([_____] L/sec) heating water at [_____] degrees F ([_____] degrees C).

Noise Criteria: NC- [_____.]

Model: [_____________] manufactured by [______________.]

INDUCTION UNIT CABINETS

Fabrication: Mounting channels, end trim pieces, mullion spacers, removable front panels, and removable discharge grills. Provide enclosures continuously column to column, or wall to wall.

Enclosures: 18 gage (1.20 mm) steel up to 18 inches (450 mm) in height, 16 gage (1.50 mm) steel over 18 inches (450 mm) in height[.] [,] [or aluminum as detailed.] Provide easily jointed components for wall to wall installation. Support rigidly, on wall or floor mounted brackets.

Finish: Factory applied baked [primer coat] [enamel of [_____] color [as selected] on visible surfaces of enclosure or cabinet.

Discharge Grills: Removable [plastic] [cast metal] [stamped steel] with maximum 1/2 inch (13 mm) openings.

Access Doors: For otherwise inaccessible valves, provide factory-made permanently hinged access doors, 6 x 7 inch (150 x 175 mm) minimum size, integral with cabinet.

Inlet Grill: [_________________________.]

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Locate induction units as indicated on Drawings. Level and shim units, and anchor to structure. Support from continuous wall mounting strip or wall mounting brackets. Center units under windows. [Where multiple windows occur over units, divide element into equal segments centered under each window.]

Extend cabinet enclosure wall-to-wall unless otherwise indicated. Support cabinet enclosures from wall mounting strip or attach direct to wall and floor. [Align cabinet joints with window mullions.] Install wall angles and wall trim pieces where units butt against walls. [Install shelving and auxiliary cabinetry.]

Provide radiator valves on coil supply and return piping. Refer to Section 15515.

Connect cooling coil condensate drain pan to condensate drain.

Provide coils with easily accessible manual air vent at high points. If not easily accessible, extend vent to exterior surface of cabinet for easy servicing.

Provide control valves on coils, easily accessible from exterior of cabinet. Refer to Section 15973.

Connect induction units to duct system with maximum 24 inches (600 mm) flexible duct. Refer to Section 15890.

SCHEDULES

Drawing_Code	IU-1	IU-2	IU-3

Manufacturer

Model

Size

Overall Performance

Sensible Cooling

Total Cooling

Room Design Temp

Primary Air

Air Flow

Inlet Air Temp

Sensible Cooling

Nozzle Series

Nozzle Static Pressure

Reheat Coil

Heat Output

Heating Water Inlet Temp

Heating Water Flow

Secondary Cooling Coil

Cooling Output

Cooling Water Inlet Temp

Cooling Water Flow

Secondary Heating Coil

Heating Output

Heating Water Inlet Temp

Heating Water Flow

Secondary Air Flow

Min. Inlet Free Area

Min. Outlet Free Area

Gravity Heating Capacity

Heating Output

Heating Water Inlet Temp

Heating Water Flow

Noise Criteria (NC)

END OF SECTION