ICTE NASEB HVAC Specifications 18 pg 020325.docx

SPECIFICATIONS

ICTE NASEB HVAC Replacement Project Wichita, KS

AJW-2C118D

Engineering Services Infrastructure Engineering Center B FTW 10101 Hillwood Pkwy Fort Worth, TX 76244

REQUIREMENTS SECTION 01 01 00

1.0 WORK SEQUENCING

A. The work site will remain operational at all times during the performance period of this project. Contractor must guarantee the site is always conditioned by providing temporary cooling to the site, maintaining an interior temperature between 65-75F.

B. Contracting Officer (CO) will coordinate the Notice to Proceed date with the Contractor to ensure his ability to commence work upon that date. The Contractor must start work within one day of receiving the Notice to Proceed (NTP) notification and complete all work within the accepted performance window.

C. Prior to the effective date of the Notice to Proceed (NTP) a maximum of 30 calendar days lead time after the Contract Award will be allowed to obtain the required materials and equipment.

D. Contractor is responsible for the verification, testing and performance of the entire system. Contractor must certify in writing the reliable operation of the system prior to release it to the FAA.

E. Contractor must provide a HVAC system that is 100% capacity redundant with standalone, independent programmable thermostats for each unit. The thermostats must be approved along with the rest of the submittals before installation may occur.

F. The contractor must perform work during normal hours as approved by the CO. The contractor may work, with prior approval of the CO or COR at no additional cost to the government, outside normal duty hours.

G. Contractor must provide mounting structures that are corrosion resistant and comply with seismic and high wind tie-down as per this specification and in compliance with the equipment manufacturer.

H. Contractor must certify in-writing a contractor warranty. This unconditional warranty must be for a period of one calendar year beginning upon the date of Contract Acceptance Inspection (CAI). The contractor must furnish all labor and material required to repair or replace defective or failed equipment.

a. Warranty Period: One (1) year of warranty on labor, materials and workmanship.

1.1 GENERAL REQUIREMENTS

K. Visits to the site by Bidders are required and can be only made by appointment through the Contracting Officer (CO).

L. Contracting Officer (CO), Resident Engineer (RE) and/or Contracting Officer Representative (COR); from now on designated and referred thru the rest of these specifications as CO, RE and COR. The RE/COR will render technical and consulting Quality Assurance (QA) services on behalf of the Federal Government. Such services shall be considered as advisory to the Government and shall not be construed as expressing or implying a contractual act between the Government and the Contractor. Any contractual matter without explicit written consent and approval by the Contracting Officer (CO) is not considered legal and therefore not contractually binding.

M. Contractor shall prepare site for construction operations, including the demolition and removal of the existing HVAC system, exterior ductwork, supporting framing that is not reused and all components.

N. All contractors’ employees shall comply with FAA and local facility conduct and security programs. Be identified and escorted at all times, and restricted from unauthorized access.

O. Prior to commencing work, general contractor shall provide proof that he/she is an OSHA “competent person” and that an OSHA “competent person” is on-site at all times.

P. The Contractor is solely responsible for determining the techniques, means, methods, and materials of installation to meet the requirements of this specification. All work shall comply with OSHA, EPA regulations, National and Local Building Constructions Codes, and Authorities Having Jurisdictions (AHJ). All products or equipment furnished shall be listed and labeled by UL, CA, ASHRAE, ARI, SMACNA or any other National Recognized Testing Laboratory (NRTL). Non-listed products will not be accepted.

Q. Equipment furnished should be of new construction, less than a year of manufacturing and of the latest technology available.

ICTE NASEB HVAC Replacement Project

1.2 SUMMARY OF WORK

A. Replace the HVAC Systems at ICTE (Wichita, KS) NASEB includes Labor and Material and general construction, demolition, alterations, mechanical piping and HVAC work, sheet metal and duct work, insulation, electrical power and control circuitry work and any other work necessary to replace existing HVAC System including the removal and disposition of existing system. The project scope covers the dismantling of the existing units, units support frame, all associated exterior ducts and supply and return grills, and all the electrical power disconnects fuses and breakers, and bonding and grounding and the existing control system as well as a cleaning of the remaining interior ductwork per NADCA standards. New construction is to include a modified concrete pad (if deemed necessary) configured to support two (2) new 20-ton packaged HVAC units meeting the description in the Statement of Work along with new exterior ductwork and supporting frames, new mainline fused disconnects for each new unit, independent programmable thermostats for each unit, new return air grill and diffusers with lockable balancing arms, a full testing and balancing of the new units, as well as a factory authorized startup technician to confirm the proper installation of the new units.

1.3 SPECIFICATIONS AND DRAWINGS FOR CONTRACTOR

A. AFTER AWARD OF CONTRACT, 2 sets of specifications and drawings will be furnished.

B. Additional sets of drawings may be made by the Contractor, at Contractor's expenses.

1.4 CONSTRUCTION SECURITY REQUIREMENTS

A. Security Plan:

1. The security plan defines security procedures that will remain effective for the entire duration of the project.

2. The Contractor is responsible for assuring that all his employees or any sub-contractors employees working on the project also comply with these regulations.

B. Security Procedures:

1. Contractor’s employees shall not enter the project site without appropriate identification and escort. They may also be subject to inspection of their personal belongings when entering or leaving the project site.

2. For working outside the “regular hours” as defined in the contract, The General Contractor shall give 3 days’ notice to the CO so that security and escort arrangements can be provided for his employees.

3. Taking photography’s of FAA buildings premises and/or equipment is not allowed.

4. FAA reserves the right to close or shut down the project site and order Contractor’s employees off the premises in the event of a national emergency. The General Contractor may return to the site only with the written approval of the Contracting Officer.

C. Document Control:

1. The Contractor is responsible for safekeeping all drawings, project specifications, project equipment manuals, and any other project document or information. This information shall be shared only with those with a specific-need-to know in order to accomplish a task within the project.

D. Motor Vehicle Restrictions:

1. Permission shall be issued for Contractor and its employees for parking in designated areas only.

2. Access by others not intrinsically related to this project shall be restricted to pick up and drop off materials and supplies.

1.5 FIRE SAFETY

A. Applicable Publications: Publications listed below form part of this Article to the extent referenced. Publications are referenced in text by basic designations only.

1. American Society for Testing and Materials (ASTM): E84-2008 Surface Burning Characteristics of Building Materials

2. National Fire Protection Association (NFPA)

3. Standard for Portable Fire Extinguishers: NFPA 10, 2013

4. Flammable and Combustible Liquids Code: NFPA 30, 2015

5. Standard for Fire Prevention During Welding, Cutting and Other Hot Work: NFPA 51B, 2014

6. National Electrical Code (NEC): NFPA 70, 2014

7. Standard for Safeguarding Construction, Alteration, and Demolition Operations: NFPA 241, 2013 B. Occupational Safety and Health Administration (OSHA):

1. Safety and Health Regulations for Construction: 29 CFR 1926 C. Fire Safety Plan: Establish and maintain a fire protection program in accordance with 29 CFR 1926, prior to start of work.

D. Site and Building Access: Maintain free and unobstructed site and building access to facility users and emergency services: fireman, police or any other emergency response forces in accordance with NFPA 241.

E. Separate temporary facilities, such as trailers, storage sheds, and dumpsters, from existing buildings by distances in accordance with NFPA 241.

F. If temporary installations are required, use and maintain installations in accordance with 29 CFR 1926, NFPA 241 and NFPA 70.

G. Means of Egress: For occupied buildings do not block exiting entrance, exits, hallways, pathways or any means of egress to exits and/or to escape to the outside of the building. Coordinate with RE/COR and facility Safety Manager Officer any disruption.

H. Egress Routes for Construction Workers: Maintain free and unobstructed. Inspect daily.

I. Fire Extinguishers: Provide and maintain extinguishers in construction areas and temporary storage areas in accordance with 29 CFR 1926, NFPA 241 and NFPA 10.

J. Flammable and Combustible Liquids: Store, dispense and use liquids in accordance with 29 CFR 1926, NFPA 241 and NFPA 30.

K. Existing Fire Protection: Do not impair automatic sprinklers, smoke or heat detection sensors, and fire alarm systems, except for portions immediately under construction, after been granted written authorization by the RE/COR and only temporarily for connections. Provide fire watch.

L. Smoke Detectors: Prevent accidental operation. Remove temporary covers at end of work operations each day. Coordinate with RE/COR.

M. Hot Work: Perform and safeguard hot work operations in accordance with NFPA 241 and NFPA 51B. Coordinate with RE/COR. Obtain permits from RE at least _2 hours in advance.

N. Fire Hazard Prevention and Safety Inspections: Inspect entire construction areas daily. Coordinate and report findings and corrective actions to RE/COR.

1. Smoking: Smoking is prohibited except in smoking designated areas.

2. Dispose of waste and debris in accordance with NFPA 241. Remove from buildings daily.

3. Perform construction, alteration, and demolition operations in accordance with 29 CFR 1926.

1.6 OPERATIONS AND STORAGE AREAS

A. The Contractor shall confine all operations (including storage of materials) on Government premises to areas authorized and approved by the RE/COR. The Contractor shall hold and save the Government, its officers and agents, free and harmless from any liability of any nature occasioned by the Contractor's performance.

B. Temporary buildings (e.g., storage sheds, etc) and utilities may be erected by the Contractor only with the approval of the CO and shall be built with labor and materials furnished by the Contractor without expense to the Government. The temporary buildings and utilities shall remain the property of the Contractor and shall be removed by the Contractor at its expense upon completion of the work.

C. The Contractor shall under regulations prescribed by the CO use only established access ways. When materials are transported in prosecuting the work, vehicles shall not be loaded beyond the loading capacity recommended by the manufacturer of the vehicle or prescribed by any Federal, State, or local law or regulation.

D. Working space and space available for storing materials shall be as determined by the RE/COR.

E. Workmen are subject to rules of FAA applicable to their conduct.

F. Execute work so as not to interfere with normal functioning of FAA employees and FAA operating areas, including operations of utility services, fire protection systems and any existing equipment, and with work being done by others. Use of equipment and tools, that transmit heavy vibrations and noises through the building structure, are not permitted due to equipment sensitivity and/or in buildings that are occupied.

1. Do not store materials and equipment in other than assigned areas.

2. Schedule delivery of materials and equipment to immediate construction working areas within buildings in quantities sufficient for not more than two work days. Provide unobstructed access to areas at all times.

3. If a crane is used to remove old equipment and or set new equipment in place, approval along with a proper airspace study must be completed in advance of the crane’s arrival. Anything above 50’ will impact the radar and may cause an unscheduled outage. Any operation of a crane shall not commence without prior approval from the SSC, Air Traffic, and RE/COR.

4. Where access by FAA personnel to vacated portions of buildings is not required, storage of Contractor's materials and equipment will be permitted subject to fire and safety requirements.

5. Contractor shall take all measures and provide all material necessary for protecting existing equipment and property in affected areas of construction against dust and debris, so that equipment and affected areas will not be damage or become dirty.

6. Contractor shall maintain in operating condition existing fire protection and alarm equipment.

G. Utilities Services: Maintain existing utility services for FAA at all times. Where necessary to cut existing conduits, wires, cables, etc. of utility services or of fire protection systems and communications systems (including telephone), they shall be as directed by RE/COR.

1. No utility service such as electricity, or fire protection systems and communications systems may be interrupted without prior approval of CO. Electrical work shall be accomplished with all affected circuits or equipment de-energized. When an electrical outage cannot be accomplished, work on energized circuits or equipment shall not commence without the RE/COR prior knowledge and written approval.

2. Contractor shall submit a request to interrupt any services to RE and the CO, in writing 72 hours in advance of proposed interruption. Request shall state reason, date, exact time and approximate duration of such interruption.

3. Contractor will be advised of approval of request, or of which other date and/or time such interruption will cause least inconvenience to FAA operations. Interruption time approved by FAA may occur at other than Contractor's normal working hours.

4. Major interruptions of any system must be requested, in writing, at least 5 calendar days prior to the desired time and shall be performed as directed by the CO.

5. In case of a contract construction emergency, service will be interrupted on approval of RE/COR. Such approval will be confirmed in writing as soon as practical.

1.7 DISPOSAL AND RETENTION

A. Materials and equipment accruing from work removed and from demolition of buildings or structures, or parts thereof, shall be disposed of as follows:

1. Items that remain property of the Government shall be removed or dislodged from present locations in such a manner as to prevent damage, which would be detrimental to reinstallation and reuse. Store such items where directed by RE/COR.

2. Items not reserved shall become property of the Contractor and be removed by Contractor from FAA facility.

1.8 PROTECTION OF EXISTING VEGETATION, STRUCTURES, EQUIPMENT, UTILITIES, AND IMPROVEMENTS A. The Contractor shall preserve and protect all structures, equipment, and vegetation (such as trees, shrubs, and grass) on or adjacent to the work site.

B. The Contractor shall protect from damage all existing improvements and utilities at or near the work site and on adjacent property of a third party, the locations of which are made known to or should be known by the Contractor. The Contractor shall repair any damage to those facilities, including those that are the property of a third party. Failure to comply with the requirements of this contract or if contractor refuses to repair the damage promptly, the CO may have the necessary work performed and charge the cost to the Contractor.

1.9 RESTORATION

A. Remove, replace, patch, and repair existing work as necessary to install new work. Except as otherwise shown or specified, do not cut, alter or remove any structural work, and do not disturb any ducts, plumbing, steam, gas, or electric work without approval of the RE/COR. Existing work to be altered or extended and that is found to be defective in any way, shall be reported to the

RE/COR before it is disturbed. Materials and workmanship used in restoring work shall conform in type and quality to that of original existing construction, except as otherwise shown or specified.

B. Upon completion of contract, deliver work complete and undamaged. Existing work (walls, ceilings, partitions, mechanical and electrical work, etc.) disturbed or removed as a result of performing required new work, shall be patched, repaired, reinstalled, or replaced with new work, and refinished and left in as good condition as existed before commencing work.

C. At Contractor's own expense, Contractor shall immediately restore to service and repair any damage caused by Contractor's workmen to existing piping’s and conduits, wires, cables, etc., of utility services or of fire protection systems and communications systems (including telephone) which are not scheduled to be discontinue or dismantle.

1.10 LAYOUT OF WORK

A. The Contractor shall layout the work from Government established base lines and benchmarks, indicated on the drawings, and shall be responsible for all field measurements in connection with the layout. The Contractor shall furnish, at Contractor's own expense, all stakes, templates, platforms, equipment, tools, materials, and labor required to layout any part of the work. The Contractor shall be responsible for executing the work to the lines and grades that may be established or indicated by the CO. The Contractor shall also be responsible for maintaining and preserving all stakes and other marks established by the CO until authorized to remove them. If such marks are destroyed by the Contractor or through Contractor's negligence before their removal is authorized, the CO may replace them and deduct the expense of the replacement from any amounts due or to become due to the Contractor.

1.11 AS-BUILT DRAWINGS

A. The contractor shall maintain two full size sets of relined/as-built drawings, which will be kept current during construction of the project, to include all contract changes, modifications, and clarifications.

B. All variations shall be shown in the same general detail as used in the contract drawings. To insure compliance, as-built drawings shall be made available for the RE/COR review, as often as requested.

C. Contractor shall deliver two approved completed sets of relined/as-built drawings to the RE/COR after the acceptance of the project by the RE/COR. Final as-build should be made available to the FAA in a softcopy in AutoCAD (DWG) or MicroStation (DGN) format.

1.12 TEMPORARY USE OF MECHANICAL AND ELECTRICAL EQUIPMENT

A. Use of new installed mechanical and electrical equipment to provide heat, ventilation, plumbing, light and power will be permitted subject to compliance with the following provisions:

1. Permission to use each unit or system must be given by RE/COR. If the equipment is not installed and maintained in accordance with the following provisions, the RE/COR will withdraw permission for use of the equipment.

2. Electrical installations used by the equipment shall be completed in accordance with the drawings and specifications to prevent damage to the equipment and the electrical systems, i.e. transformers, relays, circuit breakers, fuses, conductors, motor controllers and their overload elements shall be properly sized, coordinated, and adjusted. Voltage supplied to each item of equipment shall be verified to be correct and it shall be determined that motors are not overloaded. The electrical equipment shall be thoroughly cleaned before using it and again immediately before final inspection including vacuum cleaning and wiping clean interior and exterior surfaces.

B. Prior to final inspection, the equipment or parts used which show wear and tear beyond normal, shall be replaced with identical replacements, at no additional cost to the Government.

C. This paragraph shall not reduce the requirements of the mechanical and electrical specifications sections.

1.13 AVAILABILITY AND USE OF UTILITY SERVICES

A. The Contractor, at Contractor's expense and in a competent manner satisfactory to the CO, if required, shall install and maintain all necessary temporary connections and before final acceptance of the work by the Government, the Contractor shall remove all the temporary connections.

1.14 TESTS

A. Pre-test mechanical and electrical equipment and systems and make corrections required for proper operation of such systems before requesting final tests. Final test will not be conducted unless pre-tested.

B. All related components as defined above shall be functioning when any system component is tested. Operational tests shall be of not less than six (6) hours during which operating and environmental conditions shall remain reasonably constant. Any malfunction, leaks, or anomaly found shall be repaired in accordance with the recommendation of the equipment manufacturer, and a new test run shall be made after completion of necessary repairs.

FTWIC 2754-10

E. Individual test result of any component, where required, will only be accepted when submitted with the test results of related components and of the entire system.

1.15 INSTRUCTIONS

A. Contractor shall furnish Installation, Maintenance and Operating (IOM) manuals as well as a written test and balancing report and startup report B. Manuals: Installation, Operation and Maintenance (IOM) manuals for each separate piece of equipment shall be delivered to the RE/COR coincidental with the delivery of the equipment to the job site. Manuals shall be complete, detailed guides for the installation, maintenance and operation of equipment. They shall include complete information necessary for placement, installation, starting, adjusting, maintaining in continuous operation for long periods and dismantling and reassembling of the complete units and sub-assembly components. Manuals shall include an index covering all component parts clearly cross-referenced to diagrams and illustrations. Emphasis shall be placed on the use of special tools and instruments. The function of each piece of equipment, component, accessory and control shall be clearly and thoroughly explained. All necessary precautions for the operation of the equipment and the reason for each precaution shall be clearly set forth. Manuals must reference the exact model, style and size of the piece of equipment and system being furnished. Manuals referencing equipment similar to but of a different model, style, and size than that furnished will not be accepted.

END OF SECTION 01 01 00

SECTION 23 81 19 - SELF-CONTAINED AIR-CONDITIONERS PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes packaged air-conditioning units with refrigerant compressors and controls, intended for outdoor installations, with integral air-cooled condensers.

1.2 SUBMITTALS

A. Product Data: Include rated capacities, furnished specialties, and accessories for each type of product indicated.

B. Shop Drawings: Diagram power, signal, and control wiring.

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

D. Field quality-control test reports.

E. Operation and Maintenance Data: For self-contained air-conditioners to include in emergency, operation, and maintenance manuals.

F. Warranty: Special warranty specified in this Section.

1.3 QUALITY ASSURANCE

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

B. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1-2004, Section 5 - "Systems and Equipment" and Section 7 - "Construction and Startup."

C. ASHRAE/IESNA 90.1-2004 Compliance: Applicable requirements in ASHRAE/IESNA 90.1- 2004, Section 6 - "Heating, Ventilating, and Air-Conditioning."

1.4 COORDINATION

A. Coordinate size and location of concrete bases for units. Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork are specified in Section 03 30 00 "Cast-in-Place Concrete."

B. Coordinate size, location, and connection details with roof curbs, equipment supports, and roof penetrations specified in Section 07 72 00 "Roof Accessories."

1.5 WARRANTY

A. General Warranty: Special warranty specified in this Article shall not deprive FAA of other rights FAA may have under other provisions of the Contract Documents and shall be in addition to, and run concurrent with, other warranties made by Contractor under requirements of the Contract Documents.

B. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of self-contained air-conditioners that fail in materials or workmanship within specified warranty period.

1. Warranty Period: Five years from date of Substantial Completion.

1.6 EXTRA MATERIALS

A. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Filters: One set of filters for each unit.

2. Fan Belts: One set of belts for each unit.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Known Acceptable Source: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Self-Contained Air-Conditioners (Larger than 15 Tons):

a. Carrier Air Conditioning.

b. Engineered Air.

c. McQuay International.

d. Trane Company (The); North American Commercial Group.

2. Remote Air-Cooled, Self-Contained Air-Conditioners (15 Tons and Smaller):

a. Carrier Air Conditioning; Div. of Carrier Corp.

b. Engineered Air.

c. McQuay International.

d. Trane Co.

e. USA Coil & Air Inc.

f. Whalen Co.

3. Integral Air-Cooled, Self-Contained Air-Conditioners (15 Tons and Smaller):

a. McQuay International.

b. Trane Co. (The); North American Commercial Group.

2.2 PACKAGED UNITS

A. Description: Self-contained, factory-assembled and -wired unit; consisting of cabinet, compressor, evaporator fan, evaporator coil, air filters, and controls; and fully charged with refrigerant and oil.

1. Condenser: Integral air-cooled condenser.

B. Disconnect Switch: Factory mounted. Also provide mainline disconnect mounted to structure.

2.3 CABINET

A. Frame and Panels: Structural-steel frame with galvanized-steel panels with baked-enamel finish in color selected by COTR, and with access doors or panels.

B. Insulation: Minimum 1/2-inch- thick, acoustic duct liner on cabinet interior and control panel.

C. Drain Pan: Galvanized steel with corrosion-resistant coating , complying with ASHRAE 62.1- 2004.

D. Isolation: Spring isolators for mounting under base of unit, with minimum static deflection of 1 inch.

E. Discharge Plenum: Cabinet extension with directional louvers.

F. Discharge Plenum: Cabinet extension with duct openings for air discharge and lined with a minimum of 2-inch- thick duct liner.

G. Corrosion-Resistant Treatment: Phenolic coating on unit interior and exterior.

H. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1-2004.

2.4 EVAPORATOR FAN

A. Material: Galvanized steel.

B. Configuration: Double-width, double-inlet, airfoil centrifugal fan; statically and dynamically balanced.

C. Drive: Belt, with fan mounted on permanently lubricated bearings or Direct, with fan and motor resiliently mounted.

D. Fan Sheaves: Cast-iron or steel sheaves, dynamically balanced, bored to fit shafts and keyed.

E. Motor Sheave: Variable and adjustable pitch selected so required rpm are obtained when set at mid-position.

F. Rating: As recommended by the manufacturer or a minimum of one and one-half times nameplate rating of motor.

G. Bearings: Grease lubricated with grease lines extended to exterior of unit.

H. Variable Air Volume: Variable-frequency motor controller.

I. Fan Motors: Comply with requirements in Section 23 05 13 "Common Motor Requirements for HVAC Equipment."

J. Motors: Multispeed, PSC type.

K. Motors: Open-drip proof or totally enclosed fan-cooled type.

L. Isolation: Mount fan and motor on common subbase and mount assembly on spring isolators with minimum static deflection of 1 inch.

2.5 COMPRESSOR

A. Description: Hermetically sealed, 3600 rpm maximum, and resiliently mounted with positive lubrication and internal motor protection.

B. Compressor Type: Scroll.

2.6 EVAPORATOR COIL

A. Direct-Expansion Coil: Seamless copper tubes expanded into aluminum fins.

1. Corrosion-Resistant Treatment: Phenolic coating applied with multiple dips and baked.

B. Refrigerant Circuits: A separate circuit for each compressor, with externally equalized thermal- expansion valve with adjustable superheat, filter-dryer, sight glass, high-pressure relief valve, and charging valves.

2.7 REMOTE AIR-COOLED CONDENSER

A. Description: Factory assembled and tested; consisting of condenser coil, fans and motors, and operating controls; suitable for roof mounting.

1. Condenser Coil: Aluminum-fin copper tube with integral subcooler; leak tested to 450 psig.

2. Condenser Fans: Direct-drive propeller type.

3. Fan Motors: Three-phase, permanently lubricated, ball bearing motors with built-in thermal-overload protection.

4. Refrigerant Line Kits: Annealed-copper suction and liquid lines that are factory cleaned, dried, pressurized, and sealed; insulated suction line; flared fittings at evaporator end, no fitting at condenser end; and service valves for both suction and liquid lines.

5. Terminate suction and liquid refrigerant piping with service valves within unit.

6. Low Ambient Control: Cycles fans to permit operation down to 0F.

7. Coil Guard: Painted galvanized steel with louvered grilles.

8. Corrosion-Resistant Treatment: Phenolic coating applied in multiple dips and baked.

2.8 INTEGRAL AIR-COOLED CONDENSER FOR UNITS 15 TONS AND SMALLER

A. Description: Factory assembled and tested; consisting of condenser coil, fans and motors, and cabinet.

1. Condenser Coil: Aluminum-fin copper tube with integral subcooler; leak tested to 425 psig.

2. Condenser Fan: Direct-drive propeller type with permanently lubricated motor with built-in thermal-overload protection.

3. Low Ambient Control: Cycles fans to permit operation down to 0 deg F.

2.9 REFRIGERATION SYSTEM

A. Description: Factory assembled and tested, and charged with CFC-free refrigerant; consisting of piping and accessories connecting compressor, evaporator coil, and condenser coil, and including the following:

1. Four-way reversing valve and suction-line accumulator.

2. Expansion valve with replaceable thermostatic element.

3. Refrigerant dryer.

4. High-pressure switch.

5. Low-pressure switch.

6. Thermostat for coil freeze-up protection during low ambient temperature operation or loss of air.

7. Low ambient switch.

8. Brass service valves installed in discharge and liquid lines.

B. Refrigerant: R-410A.

2.10 AIR FILTERS

A. Extended-Surface, Disposable Panel Filters: 2-inch thick, dry, filters with fibrous media material formed into deep-V-shaped pleats and held by self-supporting wire grid holding frames, with nonflammable cardboard media and media-grid frame.

1. Efficiency: ASHRAE 52.2 MERV rating of 6 or higher.

2.11 CONTROLS

A. Control Package: Approved wall-mounted independent, programmable thermostats

B. Time-Delay Relay: Five-minute delay to prevent compressor cycling.

C. Adjustable Thermostat: Remote to control the following:

1. Supply fan.

2. Compressor.

3. Condenser.

4. Electric heater.

D. Fan Control Switch: Auto-on.

E. Time Clock: Cycle unit on and off.

2.12 VENTILATION OPTIONS FOR UNITS 15 TONS AND SMALLER

A. Motorized Outside-Air Damper: Motorized, two-position blade damper allowing induction of up to 25 percent outside air; with spring-return, low-voltage damper motor.

B. Economizer: Damper assembly allowing induction of up to 100 percent outside air to maintain a selected mixed-air temperature; and exhaust damper and spring-return, low-voltage, modulating damper motor with minimum position adjustment.

C. Energy-Recovery Ventilator: Assembly of desiccant-coated, heat-recovery wheels and centrifugal exhaust fans to transfer approximately 67 percent of the difference between the sensible and latent heat of outside and exhaust air.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install units level and plumb.

B. Anchor units to structure.

C. Use all rigid conduit for exterior installations and EMT for interior installations.

3.2 CONNECTIONS

A. Install equipment according to FAA STD-1217G

B. Ground equipment according FAA-STD-019F

C. Comply with all current NEC standards except in cases where FAA standards overlap.

D. Install conduit adjacent to unit to allow service and maintenance.

E. Duct Connections: Drawings indicate the general arrangement of ducts. Connect supply and return ducts to self-contained air-conditioners with flexible duct connectors.

3.3 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust field-assembled components and equipment installation, including connections. Report results in writing.

B. Perform the following field tests and inspections and prepare test reports:

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

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

3.4 STARTUP SERVICE

A. Engage a factory-authorized service representative to perform startup service.

1. Complete installation and startup checks according to manufacturer's written instructions.

2. Engage a TABB certified technician to perform a full test and balance. Comply with requirements in ASHRAE 62.1-2004, Section 7.2.2 “Air Balancing”.

3.5 DEMONSTRATION

A. Engage a factory-authorized service representative to train FAA's maintenance personnel to adjust, operate, and maintain units.

END OF SECTION 23 81 19

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