Attachment__8 _Fan_Coil_Unit_Spec_for_Sample.pdf

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FAN COIL UNITS

SECTION 238219 - FAN COIL UNITS

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes 4-pipe fan coil units and accessories.

1.2 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Shop Drawings:

1. Include details of equipment assemblies. Indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

2. Include diagrams for power, signal, and control wiring.

C. Samples: For units with factory-applied color finishes.

1.3 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.

1.4 QUALITY ASSURANCE

A. Comply with NFPA 70.

B. ASHRAE/IES 90.1 Compliance: Applicable requirements in ASHRAE/IES 90.1, Section 6 - "Heating, Ventilating, and Air-Conditioning."

C. Insulation adhesive shall be solvent-free and UL recognized. Adhesive shall comply with UL 1995, and be performance verified to UL 723 Test for Surface Burning Characteristics of Building Materials.

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. Factory-packaged and -tested units rated according to AHRI 440, ASHRAE 33, and UL 1995.

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2.2 VERCTICAL STACKED FAN COIL UNITS

A. Fan Coil Unit Configurations:

1. Number of Heating Coils: One with two-pipe system.

2. Number of Cooling Coils: One with two-pipe system.

B. Coil Section Insulation: 1/2-inch foil-covered, closed-cell foam. Insulation shall meet NFPA- 90A requirements for flame spread and smoke generation. Insulation adhesive shall be solvent-free and UL recognized. Adhesive shall comply with UL 1995, and be performance verified to UL 723 Test for Surface Burning Characteristics of Building Materials.

1. Surface-Burning Characteristics: Insulation and adhesive shall have a combined maximum flame-spread index of 25 and smoke-developed index of 50 when tested according to ASTM E 84 by a qualified testing agency.

2. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.2010.

C. Units shall have a stainless steel, removable drain pan extending the entire width of the cabinet.

D. Galvanized drain pans shall be internally coated with 2-part closed cell foam insulation.

E. Drain pan shall be factory piped to the drain riser port with a removable/cleanable “p-trap”.

F. Stainless steel pans shall be externally coated with 2-part closed cell foam insulation.

G. Cabinet: Galvanized steel with baked-enamel finish in manufacturer's standard paint color.

1. Vertical Unit Front Panels: Removable with integral stamped discharge grille and channel-formed edges, cam fasteners, and insulation on back of panel.

2. Stack Unit Discharge and Return Grille: Aluminum double-deflection discharge grille, and louvered- or panel-type return grille; Return grille shall provide maintenance access to fan coil unit.

H. Filters: Minimum arrestance and a minimum efficiency reporting value (MERV) according to ASHRAE 52.2 and all addendums. Pleated non-woven synthetic MERV 8.

I. Hydronic Coils: All coils shall have 1/2˝ copper tubes, manual air vents, and aluminum fins, 14 fins per inch spacing. Coil fins shall be mechanically bonded to copper tubes. Copper tubes must comply with ASTM B-75. Fin thickness shall be 0.0045˝ and tube thickness shall be 0.016˝. All coils shall be leak tested with air at 300 psig under water.

J. Fan and Motor Board: Removable.

1. Motors shall be three speed, single phase, 60 Hz constant-torque ECM motors with means for field adjustment of each speed, for 115 volts, permanently lubricated, with ball bearings.

2. Motors shall be connected with quick connect electrical plugs.

3. Motors shall have internal thermal overload protection with automatic reset.

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K. Factory, Hydronic Piping Package: ASTM B 88, Type L copper tube with wrought-copper fittings and brazed joints. Label piping to indicate service, inlet, and outlet.

1. Two-way, PICV control valve for chilled-water coil.

2. Two-way, PICV control valve for hot-water heating coil.

3. Two-Piece Ball Valves: Bronze body with full-port, chrome-plated bronze ball; PTFE or

TFE seats; and 600-psig minimum CWP rating and blowout-proof stem.

4. Y-Pattern Hydronic Strainers: Cast-iron body (ASTM A 126, Class B); 125-psig working pressure; with threaded connections, bolted cover, perforated stainless-steel basket, and bottom drain connection. Include minimum NPS 1/2 hose-end, full-port, ball-type blowdown valve in drain connection.

Wrought-Copper Unions: ASME B16.22.

5. Supply Grille: Double-deflection aluminum finish supply grilles with opposed blade damper shall be furnished for field installation on units with two or more discharge.

6. Unit shall be supplied with sight and acoustical baffle in the supply air plenum in units with two discharge grilles.

L. Control devices and operational sequences are specified in Section 230923 "Direct Digital Control (DDC) System for HVAC" and Section 230993.11 "Sequence of Operations for HVAC

DDC."

M. Basic Unit Controls:

1. Control voltage transformer.

2. Wall-mounting thermostat with the following features:

a. Heat-cool-off switch.

b. Fan on-auto switch.

c. Fan-speed switch.

d. Automatic changeover.

e. Adjustable deadband.

f. Concealed set point.

g. Exposed indication.

h. Degree F indication.

3. Wall-mounting temperature sensor.

4. Unoccupied-period-override push button.

5. Data entry and access port.

a. Input data includes room temperature, and humidity set points and occupied and unoccupied periods.

b. Output data includes room temperature and humidity, supply-air temperature, entering-water temperature, operating mode, and status.

N. DDC Terminal Controller:

1. Scheduled Operation: Occupied and unoccupied periods on seven-day clock with a minimum of four programmable periods per day.

2. Unoccupied-Period-Override Operation: Two hours.

3. Unit Supply-Air Fan Operation:

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a. Occupied Periods: Fan runs continuously.

b. Unoccupied Periods: Fan cycles to maintain room setback temperature.

4. Hydronic-Cooling-Coil Operation:

a. Occupied Periods: Modulate control valve to maintain room temperature.

b. Unoccupied Periods: Close control valve.

5. Heating-Coil Operation:

a. Occupied Periods: Modulate control valve to provide heating if room temperature falls below thermostat set point.

b. Unoccupied Periods: Start fan and modulate control valve if room temperature falls below setback temperature.

6. Controller shall have volatile-memory backup.

O. Electrical Connection: Factory wire motors and controls for a single electrical connection.

2.3 2.2 INDOOR FAN COIL UNITS

A. Fan Coil Unit Configurations:

1. Number of Heating Coils: One.

2. Number of Cooling Coils: One.

B. Coil Section Insulation: 1/2-inch foil-covered, closed-cell foam. Insulation shall meet NFPA- 90A requirements for flame spread and smoke generation. Adhesive shall be certified according to the GREENGUARD Indoor Air Quality (IAQ) Certification for Low Emitting Products.

Reference Standard: GGPS.001 GREENGUARD IAQ Standard for Building Materials, Finishes, and Furnishings.

1. Surface-Burning Characteristics: Insulation and adhesive shall have a combined maximum flame-spread index of 25 and smoke-developed index of 50 when tested according to ASTM E 84 by a qualified testing agency.

2. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

C. Main Drain Pans: Stainless steel. Fabricate pans and drain connections to comply with ASHRAE 62.1. Drain pans shall be removable.

D. Cabinet: Galvanized steel with baked-enamel finish in manufacturer's standard paint color.

1. Unit case top shall be supplied with a collar for supply duct connection.

2. Units shall be configured for bottom-return or front-return as indicated on the plans.

3. Units shall be fitted with return air filter rack.

4. Units shall have pleated MERV 8 filter.

5. Units shall be supplied with optional 6” legs.

6. Pleated non-woven synthetic MERV 8.

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E. Hydronic Coils: All coils shall have 1/2 inch copper tubes, manual air vents, and aluminum fins, 14 fins per inch spacing. Coil fins shall be mechanically bonded to copper tubes. Copper tubes must comply with ASTM B-75. Fin thickness shall be 0.0045 inch and tube thickness shall be 0.016˝. All coils shall be leak tested with air at 300 psig under water.

F. Fan and Motor Board: Removable.

1. Motors shall be three speed control, single phase, 60 Hz constant-torque ECM motors with means for field adjustment of each speed, for 115 volts, permanently lubricated, with ball bearings.

2. Motors shall be connected with quick connect electrical plugs.

3. Motors shall have internal thermal overload protection with automatic reset.

G. Electrical Connection: Factory wire motors and controls for a single electrical connection.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install fan coil units level and plumb.

B. Install fan coil units to comply with NFPA 90A.

C. Suspend fan coil units from structure with elastomeric hangers. Vibration isolators are specified in Section 230548 "Vibration and Seismic Controls for HVAC Piping and Equipment."

D. Verify locations of thermostats and other exposed control sensors with Drawings and room details before installation. Install devices 48 inches above finished floor.

E. Install new filters in each fan coil unit within two weeks after Substantial Completion.

F. Piping installation requirements are specified in other Sections. Drawings indicate general arrangement of piping, fittings, and specialties. Specific connection requirements are as follows:

1. Install piping adjacent to machine to allow service and maintenance.

2. Connect piping to fan coil unit factory hydronic piping package. Install piping package if shipped loose.

3. Connect condensate drain to indirect waste. Install condensate trap of adequate depth to seal against fan pressure. Install cleanouts in piping at changes of direction.

3.2 FIELD QUALITY CONTROL

A. Perform the following tests and inspections:

1. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

2. Operate electric heating elements through each stage to verify proper operation and electrical connections.

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3. Test and adjust controls and safety devices. Replace damaged and malfunctioning controls and equipment.

B. Remove and replace malfunctioning units and retest as specified above.

C. Prepare test and inspection reports.

3.3 ADJUSTING

A. Adjust initial temperature and humidity set points.

B. Occupancy Adjustments: When requested within 12 months of date of Substantial Completion, provide on-site assistance in adjusting system to suit actual occupied conditions. Provide up to two visits to Project during other-than-normal occupancy hours for this purpose.

END OF SECTION 238219