SECTION 15835

TERMINAL HEAT TRANSFER UNITS

PART 1 GENERAL

SECTION INCLUDES

Baseboard radiation.

Finned tube radiation.

Convectors.

Unit heaters.

Cabinet unit heaters.

Fan-coil units.

Unit ventilators.

[Hydronic] [Electric] radiant heaters.

Electric [baseboard] [unit] heaters.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____ - _____:] Installation of unit ventilator wall louvers.

Section 15952 - Controls and Instrumentation: Installation of room thermostats.

Section 16180 - Equipment Wiring Systems: Installation of room thermostats.

RELATED SECTIONS

Section 15170 - Motors.

Section 15510 - Hydronic Piping.

Section 15515 - Hydronic Specialties.

Section 15520 - Steam and Steam Condensate Piping.

Section 15525 - Steam and Steam Condensate Specialties.

Section 15751 - Glycol System.

Section 15952 - Controls and Instrumentation.

Section 16180 - Equipment Wiring Systems: Electrical supply to units.

REFERENCES

ANSI/NFPA 70 - National Electrical Code.

SUBMITTALS

Submit shop drawings under provisions of Section [01300.] [01340.]

Submit shop drawings indicating cross section of cabinets, grille, bracing and reinforcing, and typical elevation.

Submit product data under provisions of Section [01300.] [01340.]

Submit product data indicating typical catalog of information including arrangements.

Submit schedules of equipment and enclosures typically indicating length and number of pieces of element and enclosure, corner pieces, end caps, cap strips, access doors, pilaster covers, and comparison of specified heat required to actual heat output provided.

Indicate mechanical and electrical service locations and requirements, specifically indicating deviations from indicated products.

Submit samples under provisions of Section [01300.] [01340.]

Submit [two] [_____] samples of each radiation cabinet detailed.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

PROJECT RECORD DOCUMENTS

Submit record documents under provisions of Section [01700.] [01720.]

Accurately record actual locations of access doors in radiation cabinets required for access or valving.

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include manufacturers descriptive literature, operating instructions, installation instructions, maintenance and repair data, and parts listings.

QUALIFICATIONS

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

REGULATORY REQUIREMENTS

Conform to [applicable] [ANSI/NFPA 70] code for internal wiring of factory wired equipment.

MOCKUP

Provide mockup of typical exterior wall module under provisions of Section [01400.] [01405.]

If accepted, mockup will demonstrate minimum standard for the Work. Mockup may [not] remain as part of the Work.

DELIVERY, STORAGE AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

Protect units from physical damage by storing in protected areas and leaving factory covers in place.

SEQUENCING AND SCHEDULING

Sequence work under the provisions of Section [01005.] [_____.]

Schedule work under the provisions of Section [01310.] [_____.]

Install radiation, convectors, fan-coil units, unit ventilators and radiant heaters (equipment exposed to finished areas) after walls and ceiling are finished and painted. Avoid damage.

WARRANTY

Provide [five] [_____] year [manufacturer's] warranty under provisions of Section [01700.] [01740.]

Warranty: Include coverage of [fan-coil unit] [unit heater] [unit ventilator] motors.

PART 2 PRODUCTS

MANUFACTURERS - [BASEBOARD RADIATION] [FINNED TUBE RADIATION] [CONVECTORS] [UNIT HEATERS] [CABINET UNIT HEATERS] [FAN COIL UNITS]

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

BASEBOARD RADIATION

Heating Elements: 3/4 inch (19 mm) ID copper tubing mechanically expanded into flanged collars of evenly spaced aluminum fins, one tube end belled.

Enclosure: Minimum 22 gage (0.80 mm) steel with [7] [10] [_____] inch ([175] [250] [_____] mm) high back and top of one piece; front panel, end panel, end caps, corners, and joiner pieces to snap together, with front panel easily removable. Provide full length damper.

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

Element Brackets: 18 gage (1.20 mm) galvanized steel to support from panel and noise free element cradle.

Capacity: Based on 65 degree F (18 degree C) entering air temperature, [180 degree F (82 degree C) average water temperature.] [one psig (6.9 kPa) steam.]

FINNED TUBE RADIATION

Heating Elements: 1-1/4 inch (32 mm) ID seamless copper tubing, 0.042 inches (1.10 mm) minimum wall thickness, mechanically expanded into evenly spaced aluminum fins, suitable for soldered fittings.

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

Heating Elements: 1-1/4 inch (32 mm) ID condenser tube, 0.123 inch (3.10 mm) minimum wall thickness mechanically expanded into evenly spaced steel fins.

Element Hangers: Quiet operating, ball bearing cradle type providing unrestricted longitudinal movement, on enclosure brackets.

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[.] [at least 3 feet (1 000 mm) on center maximum.]

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

Damper: Where not thermostatically controlled, provide knob-operated internal damper at enclosure air outlet.

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.

Capacity: Based on 65 degree F (18 degree C) entering air temperature, [180 degree F (82 degree C) average water temperature.] [one psig (6.9 kPa) steam.]

CONVECTORS

Heating Elements: Seamless copper tubing mechanically expanded into evenly spaced aluminum fins and cast iron headers, steel side plates and supports, factory air pressure tested at 100 psi (689.4 kPa) under water, with means of adjusting pitch of element.

Cabinet: 16 gage (1.50 mm) steel front and top, 18 gage (1.20 mm) steel back and ends; exposed corners rounded; easily secured removable front panels, adequately braced and reinforced for stiffness.

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

Damper: Where not thermostatically controlled, provide knob-operated internal damper at enclosure air outlet.

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.

Capacity: Based on 65 degree F (18 degree C) entering air temperature, [180 degree F (82 degree C) average water temperature.] [one psig (6.9 kPa) steam).]

UNIT HEATERS

Coils: Seamless copper tubing, 0.025 inch (0.64 mm) minimum wall thickness, silver brazed to steel headers, and with evenly spaced aluminum fins mechanically bonded to tubing.

Casing: 18 gage (1.20 mm) steel with threaded pipe connections for hanger rods.

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

Fan: Direct drive propeller type, statically and dynamically balanced, with fan guard; horizontal models with permanently lubricated sleeve bearings; vertical models with grease lubricated ball bearings.

Air Outlet: Adjustable pattern diffuser on projection models and [two] [four] way louvers on horizontal throw models.

Motor: Refer to Section 15170; horizontal models with permanently lubricated sleeve bearings; vertical models with grease lubricated ball bearings.

Control: Local [multi-speed] disconnect switch.

Capacity: Based on 65 degree F (18 degree C) entering air temperature, [180 degree F (82 degree C) average water temperature.] [one psig (6.9 kPa) steam.]

CABINET UNIT HEATERS

Coils: Evenly spaced aluminum fins mechanically bonded to copper tubes, designed for 100 psi (1 379 kPa) and 220 degrees F (1.4 degrees C).

Cabinet: 16 gage (1.50 mm) steel with exposed corners and edges rounded, easily removed panels, glass fiber insulation[,][.] [and integral air outlet.] [and inlet grilles.]

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

Fans: Centrifugal forward-curved double-width wheels, statically and dynamically balanced, direct driven.

Motor: Refer to Section 15170; sleeve bearings, resiliently mounted.

Control: Multiple speed switch, factory wired, located in cabinet.

Filter: Easily removed one inch (25 mm) [thick glass fiber throw-away [permanent washable] type, located to filter air before coil.

Mixing Dampers: Where indicated, mixing sections with dampers. Refer to Section 15952 for operating sequence.

Capacity: Based on 65 degree F (18 degree C) entering air temperature, [180 degree F (82 degree C) average water temperature.] [one psig (6.9 kPa) steam.]

FAN-COIL UNITS

Coils: Evenly spaced aluminum fins mechanically bonded to copper tubes, designed for 200 psi (1 379 kPa) and 220 degrees F (104 degrees C). [Provide drain pan under cooling coil, easily removable for cleaning, with drain connection.]

Cabinet: 16 gage (1.50 mm) steel with exposed corners and edges rounded, easily removed panels, glass fiber insulation[,][.] [and integral air outlet.] [and inlet grilles.]

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

Fans: Centrifugal forward-curved double-width wheels, statically and dynamically balanced, direct driven.

Motor: Refer to Section 15170; sleeve bearings, resiliently mounted.

Control: Multiple speed switch, factory wired, located in cabinet.

Filter: Easily removed one inch (25 mm) [thick glass fiber throw-away [permanent washable] type, located to filter air before coil.

Mixing Dampers: Where indicated, mixing sections with dampers. Refer to Section 15952 for operating sequence.

Capacity: Based on 65 degrees F (18 degrees C) entering air temperature, [180 degree F (82 degree C) average water temperature.] [one psig (6.9 kPa) steam.]

MANUFACTURERS - UNIT VENTILATORS

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

UNIT VENTILATORS

Coils: Copper tubes mechanically expanded into evenly spaced aluminum fins tested to operate at 150 psi (1 034 kPa). [Provide drain pan under cooling coil, easily removable for cleaning, with drain connection.]

Electric Heating Coil: [Enclosed copper tube, aluminum finned element of coiled nickel-chrome resistance wire centered in tubes and embedded in refractory material.] [Exposed helical coil of nickel-chrome resistance wire with refractory ceramic support bushings.]

Cabinet: 14 gage (1.80 mm) steel on solid base pan with exposed edges rounded. Provide removable front panels with quick-acting, key-operated camlocks. Provide removable die-cast or fabricated steel discharge grilles. [For units having cooling coils, insulate internal parts and surfaces exposed to conditioned air stream with moisture resistant insulation.]

Cabinet Accessories: Matching steel construction, reinforced, for use with unit ventilators or finned radiation, with steel alignment pins, adjustable kick plates with leveling bolts, shelves and sliding doors [with locks] as indicated, [sinks,] [bubbler faucets and bowls,] corner, end, and wall filler sections as required.

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

Fans: Centrifugal forward-curved double-width wheels, statically and dynamically balanced, direct driven, arranged to draw air through coil.

Wall Louvers: [Anodized aluminum] [Galvanized steel] wall intake box and louvers removable from frame with 1/2 inch (13 mm) square mesh galvanized screen in back of louver.

Motor: Refer to Section 15170; sleeve bearing, resiliently mounted.

Air Cooled Condensing Unit: Corrosion resistant cabinet, with hermetically sealed compressor with internal spring isolation, external isolation, permanent split capacitor motor and overload protection, copper tube aluminum fin condenser coil, direct drive propeller fan with [permanently lubricated ball bearing] single phase motor with internal overload protection.

Control: Multiple speed switch, factory wired, located in cabinet.

Mixing Dampers: Multi-blade with compressible seal, capable of varying proportion of mixed air from 100 percent room air to 100 percent outside air.

Heating Capacity: Based on 65 degree F (18 degree C) entering air temperature, [180 degree F (82 degree C) average water temperature.] [one psig (6.9 kPa) steam.]

MANUFACTURERS - [HYDRONIC] [ELECTRIC] RADIANT HEATERS

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

HYDRONIC RADIANT HEATERS

Ceiling Panels: Constructed of modular [5 inch (125 mm) wide aluminum extrusions with interlocking edges;] [24 x 48 inch (600 x 1 200 mm) aluminum pans with silkscreened pattern matching ceiling tile;] manufactured and assembled to sizes and configurations indicated.

Pipe Coil: [5 inch (125 mm) module to incorporate extruded void into which continuous 1/2 inch (13 mm) copper pipe is rolled and thermally bonded.] [24 x 48 inch (600 x 1 200 mm) aluminum pan module to incorporate continuous 1/2 inch (13 mm) copper pipe thermally bonded.] Provide return bends for two water connections to each panel.

Where indicated provide panels which incorporate extruded drapery track.

Cross brace entire assembly with structural members and insulate with one inch (25 mm) thick fiberglass insulation.

ELECTRIC RADIANT HEATERS

Assembly: UL listed and labelled, with thermal box and cover, and [built-in] controls.

Heating Elements: Enclosed copper tube element of coiled nickel-chrome resistance wire centered in tubes and embedded in refractory material, [in metal reflective cabinet.] [bonded to ceiling panel.]

Ceiling Panels: 24 x 48 inch (600 x 1 200 mm) aluminum pans with silkscreened pattern matching ceiling tile; manufactured and assembled to configuration indicated.

MANUFACTURERS - ELECTRIC BASEBOARD

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

ELECTRIC BASEBOARD

Assembly: UL listed and labelled with terminal box and cover, and [built-in] controls.

Heating Elements: Enclosed copper tube, aluminum finned element of coiled nickel-chrome resistance wire centered in tubes and embedded in refractory material.

Enclosure: Minimum 22 gage (0.80 mm) steel with [7] [10] [_____] inch ([175] [250] [_____] mm) high back and top of one piece; front panel, end panel, end caps, corners, and joiner pieces to snap together, and front panel easily removable. Provide full length damper.

Element Hangers: Quite operating, ball bearing cradle type providing unrestricted longitudinal movement, on enclosure brackets.

Control: [Built-in bi-metal heating thermostat, factory wired.] [Wall mounted electric thermostat.]

MANUFACTURERS - ELECTRIC UNIT HEATERS

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

[_____________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

ELECTRIC UNIT HEATERS

Assembly: UL listed and labelled assembly with terminal box and cover, and [built-in] controls.

Heating Elements: [Enclosed copper tube, aluminum finned element of coiled nickel-chrome resistance wire centered in tubes and embedded in refractory material.] [Exposed helical coil of nickel-chrome resistance wire with refractory ceramic support bushings.]

Cabinet: 18 gage (1.2 mm) steel with easily removed front panel with integral air outlet and inlet grilles.

Element Hangers: Quiet operating, ball bearing cradle type providing unrestricted longitudinal movement, on enclosure brackets.

Fan: Direct drive propeller type, statically and dynamically balanced, with fan quard.

Motor: Refer to Section 15170; horizontal models with permanently lubricated sleeve bearings; vertical models with grease lubricated ball bearings.

Control: Separate fan speed switch and thermostat heat selector switch, factory wired, with switches built-in behind cover. Provide thermal overload.

PART 3 EXECUTION

EXAMINATION

Verify that surfaces are ready to receive work and opening dimensions are as [indicated on shop drawings.] [instructed by the manufacturer.]

Verify that required utilities are available, in proper location, and ready for use.

Beginning of installation means installer accepts existing surfaces.

INSTALLATION

Install in accordance with manufacturer's instructions.

Locate baseboard radiation on outside walls and run cover continuously wall-to-wall unless otherwise indicated. Center elements under windows. [Where multiple windows occur over units, divide element into equal segments centered under each window.] Install end caps where units butt against walls.

Locate finned tube radiation on outside walls and run cover wall-to-wall unless otherwise indicated. Center elements under windows. [Where multiple windows occur over units, divide element into equal segments centered under each window.] [Align cabinet joints with window mullions.] Install wall angles where units butt against walls.

Install convectors as indicated.	Coordinate to assure correct recess size for recessed convectors.

Hang unit heaters from building structure, with pipe hangers anchored to building, not from piping. Mount as high as possible to maintain greatest headroom unless otherwise indicated.

Install [cabinet unit heaters] [fan-coil units] as indicated. Coordinate to assure correct recess size for recessed units.

Locate unit ventilators as indicated, level and shim units, and anchor to structure. Coordinate exact location of wall louvers. [Install shelving and auxiliary cabinetry.] [Provide wall trim pieces for continuous wall- to-wall installation.]

Protect units with protective covers during balance of construction.

Provide hydronic units with shut-off valve on supply and lockshield balancing valve on return piping. If not easily accessible, extend vent to exterior surface of cabinet for easy servicing. For cabinet unit heaters, fan coil units, and unit heaters, provide float operated automatic air vents with stop valve.

Install electric heating equipment including devices furnished by manufacturer but not factory-mounted. Furnish copy of manufacturer's wiring diagram submittal. Verify that electrical wiring installation is in accordance with manufacturer's submittals and installation requirements of Division 16 sections.

CLEANING

Clean work under provisions of [01700.] [01710.]

After construction is completed, including painting, clean exposed surfaces of units. Vacuum clean coils and inside of cabinets.

Touch-up marred or scratched surfaces of factory-finished cabinets, using finish materials furnished by manufacturer.

Install new filters.

RADIATION SCHEDULE

Drawing_Code	A	B	C

Manufacturer

Model

Fin Type

Enclosure Type

Rows

Heat Output

Remarks

CONVECTOR SCHEDULE

Drawing_Code	C-1	C-2	C-3

Manufacturer

Enclosure Type

Enclosure Size

Heat Output

Remarks

UNIT HEATER SCHEDULE

Drawing_Code	UH-1	UH-2	UH-3

Location

Manufacturer

Model

Heat Output

Water Flow

Motor (rpm)

Motor (hp)

Remarks

CABINET UNIT HEATER SCHEDULE

Drawing_Code	CH-1	CH-2	CH-3

Location

Manufacturer

Model

Arrangement

Heat Output

Remarks

Water Flow

Motor (rpm)

Motor (hp)

Remarks

[FAN COIL UNIT] [UNIT VENTILATOR] SCHEDULE

Drawing_Code FC-1 FC-2 UV-3

Manufacturer

Model

Supply Fan

Air Flow

Static Pressure

Motor (hp)

Cooling

Sensible

Total

Entering DB Temp

Entering WB Temp

Leaving DB Temp

Leaving WB Temp

Nominal Capacity (tons):

Remarks

ELECTRIC [BASEBOARD] [UNIT] HEATER SCHEDULE

Drawing_Code	EH-1	EH-2	EH-3

Location

Manufacturer

Model

Heat Output

Power Input

Motor (rpm)

Motor (hp)

Remarks

END OF SECTION