AEX HVAC replacement SOW.doc

DEPARTMENT OF TRANSPORTATION

FEDERAL AVIATION ADMINISTRATION

CENTRAL SERVICE AREA-NAS DEFENSE

INFRASTRUCTURE PROGRAM

SPECIFICATIONS FOR THE REPLACEMENT

OF AIR CONDITIONING EQUIPMENT AT THE ALEXANDRIA AIR ROUTE SURVEILLANCE

RADAR (ARSR) ALEXANDRIA, LA

Prepared by: Kenneth Graves

Houston TSC

DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATIONPRIVATE

CSA

PROJECT SPECIFICATIONS FOR THE INSTALLATION

OF NEW AIR CONDITIONING EQUIPMENT AT THE ALEXANDRIA (AEX)

ARSR, ALEXANDRIA, LOUISIANA

1.

SUMMARY OF WORK

1.1 General - These specifications together with project drawings, referenced specifications, and FAA applicable orders cover the requirements of the Federal Aviation Administration (FAA) for furnishing all equipment, supplies, materials, tools, and their use in connection with the installation of new air conditioning (AC) equipment at the AEX ARSR facility.

Scope NOTE 1: Dimensions listed on the drawings and in this document are approximate and are provided for estimating purposes. It is the contractor’s responsibility to field verify all dimensions prior to ordering project materials or equipment.

NOTE 2: There are 2 identical air conditioning systems installed at the ARSR facility. One operates as a primary and the other is designated as a standby. Due to the critical role the ARSR has in Air Traffic Control, the contractor shall only be allowed replace one system at a time. Only after one system has been installed and checked out for operation, will the contractor be allowed to remove the remaining unit. Air Conditioning is required to keep electronic equipment fully operational.

NOTE 3: The only government furnished (GF) material provided under this project is the HVAC control panel. All other equipment and materials required for HVAC installation will be provided by the contractor.

1.1 The contractor must remove the following:

A. Two (2) existing 30 ton Carrier split air conditioning systems. There are two outdoor condensing units (CUs) and two indoor air handling units (AHUs). The CUs each weigh approximately 1,264. The AHUs each weigh approximately 1,062 pounds and can be removed from the building without dissembling.

B. AHU Removal – Prior to AHU removal the contractor must disconnect the following items installed on each unit:

1. All Liquid Tight Flexible Metal (Flex) conduit and associated cable/wire. It should be noted that all power and control cables enter the AHUs via Flex conduit. After disconnecting the contractor shall remove all existing cable from Flex and rigid conduit. Under this contract all of the AHU’s associated interior Flex conduit, power and control cables will be replaced. All interior rigid conduit shall be reused for the installation of new cable. In addition to the rigid conduit, all conduit steel support racks shall remain for reuse. See drawing AEX-D-ARSR-M006 for additional details.

2. All copper liquid and suction line piping (including suction line insulation). Under this contract, the contractor shall replace all refrigerant piping, insulation, filter driers and sight glasses. Existing steel racks that support refrigerant lines shall be reused.

3.) Return and supply air attachment duct collars. NOTE: To reduce project cost and lessen the need for major modifications to existing ductwork. The contractor must provide new AHUs that have comparable dimensions to existing AHUs. In addition to dimensions, the new AHUs should have their supply air (SA) return air and (RA) openings on the same side as existing units.

4.) The following items that are installed on the RA and SA duct: Fan safety switches, Low air flow switches, Air filter switch and Duct smoke detectors. NOTE: New Duct smoke detectors and Air filter switches will be installed. The Low air and Fan safety switches will not be reinstalled. The contractor shall seal all holes left in ductwork as a result of switch removal.

C. Condensing Unit Removal Remove two existing CUs and all associated power and control cable, electrical conduit, refrigerant piping and insulation. The contractor shall leave in place the wall mounted junction box (J-Box), which is used to route thermostat wire into the building. Remove all conduit and piping support hardware (see drawing AEX-D-ARSR-M007 for location of J-Box and other items that require removal).

D. HVAC Control Panel Remove the existing HVAC control panel. The panel is located on the building’s 2nd floor and is mounted to the back wall of the quiet room. The contractor shall leave in-place the thermostat wire conduit, it shall be reused. The panel’s 120 volt power cable and its associated conduit will be removed. The power cable and conduit will be removed from the breaker panel powering the existing control unit. Contractor will be required to seal the hole left (in the breaker panel) by conduit removal, using an approved cover plate. Note: The new GF panel is powered from the AHUs low voltage circuit, 120 volte power is not required.

1.2 The contractor shall install the following:

Two (2) 30 ton York split systems with the following descriptions:

I.) Condensing Units

a. 2 each 30 ton, York R-410A Condensers, Model# YD360C00A2AAA2, 4-Pipe, Four stage cooling, 208/230V-3 phase, 60 Hz, Copper tub/Aluminum fin Condenser coil, Smart equipment controller or approved equal. NOTE: The contractor shall provide and install plastic labels on CUs. See drawing AEX-D-ARSR-M009 for additional details on labels.

CU Cooling Performance:

· Gross capacity – 357.0 MBH

· Sensible capacity – 258.0 MBH

· Efficiency – 10 EER

· Ambient DB temp. -105.0 deg. F

CU Unit Features:

· Cabinet construction – Powder painted steel

· Full perimeter base rails

· Dual circuit 4 stage cooling w/ scroll compressors

· Solid core line filter driers

· Sweat connection fittings

· Condenser coil guards

· Smart equipment control board

· NOTE: The coils of all exterior units must have phenolic epoxy corrosion-protection or an approved equal coating.

b. Install the following CU ancillary components:

· Contractor Furnished (CF) Suction lines, liquid refrigerant lines and suction line insulation. New lines will be routed from CUs to interior AHUs. All new lines shall be securely attached to concrete slab, walls and to interior metal support racks. See section 4.8 for line type details. NOTE: Contractor shall install an aluminum field applied jacket over suction line insulation (see section 4.9 for additional information on jackets). Jackets will not be required for line insulation on interior piping.

· New CF Rigid galvanized steel (RGS) electrical conduit (for power and thermostat cable). New conduit shall be tied into existing interior EMT conduit at the point where the RGS enters the building. Small amounts of Flex conduit can be used when running power cable between the load side of the AHU’s disconnect switch and the CU’s power access power panel. At all other locations outside of the building RGS is required. All conduit shall be securely attached and supported along the entire route.

· Two (2) New 204V, 200Amp, 3-phase, heavy duty stainless steel disconnect switches. New disconnect switch equipment rack. The rack shall be constructed as outlined in the project drawings. See project drawings and section 5 for additional switch information.

· New Power cable and one set of thermostat wire/CU. New power cable shall be installed between CUs and breaker panel “MCH”. See project drawing AEX-D-ARSR-M007 and section 5 for power cable details.

· Contractor shall extend an existing 14’x14’ concrete CU slab by 5 feet. See drawing AEX-D-ARSR-M007 for additional details.

· Ground new CUs and switch racks with #4/0 green insulated ground conductors. See project drawings and section 5 for grounding details.

II.) Air Handling Units

a. 2 each 30 ton, York R-410A Air Handlers, Model# ND360C00N6AAA1, 208/230V-3 Phase, 60 Hz, 4 Pipe, with Field Installed Motor Drive Kit, Drain Pan, Low Static Drive (contains sheave and belt), Motor-VFD rated 208-230/460 Volts, 3 Phase, 5 HP and Motor overload relay Kit, or approved equal. NOTE: The contractor shall provide and install plastic labels on new AHUs. See drawing AEX-D-ARSR-M009 for additional details on labels.

NOTE: The contractor shall request the installation of a freeze stat in new AHUs, if the unit manufacture does not provide one as standard equipment. The stat will interrupt control power if evaporator coil gets to cold, causing icing. The new GF control panel will utilize a thermostat control wire to support this feature.

New CF AHU Cooling Performance:

· Total gross capacity - 357.0 MBH

· Sensible gross capacity - 258.0 MBH

· Total net capacity - 339.6 MBH

· Sensible net capacity - 240.6 MBH

· Entering DB temp. - 80.0 °F

· Entering WB temp. - 67.0 °F

· Leaving DB temp. - 60.1 °F

· Leaving WB temp. - 57.6 °F

AHU Unit Features

· Dual Circuit Refrigeration

· Factory mounted pump out liquid line solenoids

· 3/8 Copper Tube / Aluminum Fin Coil

· Adjustable balance port TXV

· Mulit-Position blower without modifying piping and drain pan

· Motor starter

· Single point power connection

· Control transformer and relays

· Short Circuit Current: 5kA RMS Symmetrical

b. Install the following AHU ancillary components:

· CF Suction lines, liquid refrigerant lines and suction line insulation. All new lines shall be securely attached to interior metal support racks. See section 4.8 for line type information.

· New CF Flex conduit, which will be installed between the AHUs and existing EMT conduit. New Flex conduit shall also be installed between new duct mounted devices and AHUs. See Section 5 for additional information on Flex conduit.

· New Power cable and 1 sets of thermostat wire/AHU. New power cable shall be installed between AHU and breaker panel “MCH”. See project drawing AEX-D-ARSR-M008.

· New CF ¾” copper condensate drain lines (both AHUs). The contractor shall also ground AHUs using #4/0 green insulated grounding conductor. See drawing AEX-D-ARSR-M008 for additional details.

· New CF Smoke Detectors and Air filter switches. The detectors shall be installed at the same location as the one that was removed. The Air filter switches shall be installed on the new AHUs at a location determined after installation.

III.) GF HVAC Control Panel The contractor shall install a new GF control panel at the same 2nd floor location as the existing panel and terminate existing thermostat EMT conduit onto the panel’s enclosure.

Two (2) sets of thermostat wire shall be pulled into the panel from new AHUs via the EMT conduit. The wire sets shall be terminated as outline in the control panel’s installation manual.

IV.) Backdraft Dampers – Contractor shall install low leakage backdraft dampers in AHU’s RA and SA duct work. See drawings AEX-D-ARSR-M011 and M009 for additional information on damper construction and installation.

V.) Install 25 Kw electric duct heaters - The duct heaters shall be installed in the supply air duct of each AHU (see drawing AEX-D-ARSR-M008). The heaters will be powered from spare breakers located in power panel MCH and controlled by the new GF HVAC control panel. The duct heater should be the type as manufactured by Warren Technology or approved.

1.3 Construction Sequence

A. The contractor must submit to the Contracting Officer (CO) for approval, a planned construction sequence and schedule for execution of work depicted on the drawings and in this specification. The contractor must prepare submittals of CRITICAL ITEMS such as all York (or approved equal) HVAC equipment and associated installation items.

B. The project schedule must take into account all equipment and product lead times.

C. All testing and balancing of HVAC equipment as well as exothermic welding, must be performed and administered under the observation and approval of the Resident Engineer (RE) E. The contractor is responsible for coordination of the work of various trades that may be involved in the job. All contractors are highly encouraged to conduct a site inspection. To arrange for a site inspection, please contact Monica Hoyer Manager, LFT SSC at office# 337-262-2721, cell# at 337-296-6981 or Steven Smith at 337-447-2947.

1.4 SUBMITTALS

A. Product Data: Include rated capacities, furnished specialties, and accessories for each type of product indicated. Include performance data in terms of capacities, outlet velocities, static pressures, sound power characteristics, motor requirements, and electrical characteristics.

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

Remaining paragraphs are defined in Division 01 Section "Submittal Procedures" as "Informational Submittals."

Retain first paragraph below if Contractor is responsible for field quality-control testing.

C. Field quality-control test reports.

D. Operation and Maintenance Data: For air-conditioning units to include maintenance manuals.

E. Warranty: Special warranty specified in Section 9.

1.5 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 to the FAA Resident Engineer (RE).

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

1. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.

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

3. Test and adjust controls and safeties. Contractor shall replace any damaged and malfunctioning controls and equipment.

2 General Construction Details

2.2 Site Location - The AEX ARSR is located at the Alexandria International Airport, located in Alexandria, LA.

2.3 Work Area - The work requires contractor activity within a critical FAA facility which must continue to operate while work is in progress. The contractor must coordinate all aspects of the work with the FAA RE prior to beginning each workday, to insure that equipment operation will not be affected.

2.4 Contractor Performance Time - Performance time (time spent at the site performing installation work), which does not included lead time on equipment is 15 work days.

2.5 Access to Worksite - The contractor will be allowed to work 8 or 10 hour days. The FAA RE will provide for contractor access to the site. Parking for contractor vehicles will be as directed by the FAA RE.

2.6 Protection of Property - It is the contractor's responsibility to protect both government and private property from damage during the work process. All worksite areas and property that are damaged by the contractor or his employees during the work process must be restored to their preconstruction condition by the contractor at no additional cost to the government.

2.7 Site Cleanup - The contractor, during the process of work, and upon completion of all work, must remove from the worksite and properly dispose of all surplus materials, tools, equipment, etc., and must clean up all rubbish and debris resulting from his work, to the satisfaction of the FAA RE.

2.8 Disposal of Old Air Conditioning Equipment - All old A/C equipment, ductwork, electrical equipment, conduits, wire, refrigerant and condensate lines must be removed by the contractor from the AEX ARSR site. The contractor must dispose of all excess materials in accordance with applicable state and federal regulations.

2.9

Security – The contractor must provide the RE with a list of contractor’s personnel who will require access to the site. The list must be kept current during project work.

2.10

Bathroom Facilities – Bathroom facilities are not available at the site. The contractor must provide his employees with restroom facilities.

3.

MATERIALS AND EQUIPMENT

Any deviation from the listed specifications must be approved in writing by the FAA RE. All equipment will be delivered in original unopened containers or factory shipping crates to the job site location.

NOTE: Prior to purchasing any materials or equipment and fabrication work, the contractor must submit, for approval shop drawings, manufacture data sheets and technical publications on AC units, duct work, dampers, smoke detectors and other control components.

3.1a EXTRA MATERIALS – The contractor must furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

Revise two subparagraphs below to suit Project.

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

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

iii. 1 extra set of disconnect switch fuses.

3.2

Submittals – Submittals, including shop drawings, are the Contractor’s sole responsibility. Carefully examine submittals to ascertain that all provisions of the specifications have been complied with. The contractor must submit a minimum of three (3) sets of shop drawings and/or brochures, or other submittals.

Operational and Maintenance Manuals – The contractor must prepare three (3) copies of identical Maintenance Brochures bound in a three-ring, loose leaf, hard cover binder. These brochures must be indexed as to sections, and sub-divided by cardboard sheets having an identification tab in one corner. Divisions must be as follows:

a.) Table of Contents b.) Operating Instructions c.) Parts List d.) Warranties e.) Identification Legends f.) As-built drawings g.) MSDS h.) Contractor Information

3.3 Heating System Specifications – Heating will be provided by electric duct heater.

4. INSULATION MATERIALS and DUCTWORK ITEMS A. Products must not contain asbestos, lead, mercury, or mercury compounds.

4.1 Quality Assurance: Materials – UL listed; flame spread/smoke developed rating of 25/50 in accordance with ASTM E84 and UL723. All products must be delivered in original, unopened packages with labels attached.

B. Mineral-Fiber Board Insulation: Mineral or glass fibers bonded with a thermosetting resin; for duct and plenum applications, provide insulation without factory-applied jacket.

4.2 GENERAL INSTALLATION REQUIREMENTS

A. Install insulation materials, accessories, and finishes with smooth, straight, and even surfaces; free of voids throughout the length of ducts and plenums.

B. Install accessories compatible with insulation materials and suitable for the service. Install accessories that do not corrode, soften, or otherwise attack insulation or jacket in either wet or dry state.

C. Install insulation with longitudinal seams at top and bottom of horizontal runs.

D. Install multiple layers of insulation with longitudinal and end seams staggered.

E. Apply adhesives, mastics, and sealants at manufacturer's recommended coverage rate and wet and dry film thicknesses.

4.3 PENETRATIONS

A. Refrigerant piping insulation installation at Aboveground Exterior Wall Penetrations: Install insulation continuously through wall penetrations. Seal penetrations with flashing sealant. For applications requiring indoor and outdoor insulation, install insulation for outdoor applications tightly joined to indoor insulation ends. Seal joint with joint sealant. Extend jacket of outdoor insulation outside wall flashing and overlap wall flashing at least 2 inches. Seal jacket to wall flashing with flashing sealant.

B. Board Insulation Installation on Ducts and Plenums: Secure with adhesive and insulation pins.

1. Apply adhesives according to manufacturer's recommended coverage rates per unit area, for 100 percent coverage of duct and plenum surfaces.

2. Apply adhesive to entire circumference of ducts and to all surfaces of fittings and transitions.

3. If required, install either capacitor-discharge-weld pins and speed washers or cupped-head, capacitor-discharge-weld pins on sides and bottom of horizontal ducts and sides of vertical ducts as follows:

a. On duct sides with dimensions 18 inches and smaller, place pins along longitudinal centerline of duct. Space 3 inches maximum from insulation end joints, and 16 inches o.c.

b. On duct sides with dimensions larger than 18 inches , space pins 16 inches o.c. each way, and 3 inches maximum from insulation joints. Install additional pins to hold insulation tightly against surface at cross bracing.

c. Pins may be omitted from top surface of horizontal, rectangular ducts and plenums.

d. Do not overcompress insulation during installation.

e. Cut excess portion of pins extending beyond speed washers or bend parallel with insulation surface. Cover exposed pins and washers with tape matching insulation facing.

4. For ducts and plenums with surface temperatures below ambient, install a continuous unbroken vapor barrier.

a. Repair punctures, tears, and penetrations with tape or mastic to maintain vapor-barrier seal.

5. Install insulation on rectangular duct elbows and transitions with a full insulation section for each surface. Groove and score insulation to fit as closely as possible to outside and inside radius of elbows. Install insulation on round and flat-oval duct elbows with individually mitered gores cut to fit the elbow.

6. Insulate duct stiffeners, hangers, and flanges that protrude beyond insulation surface with 6-inch- wide strips of same the material used to insulate duct. Secure on alternating sides of stiffener, hanger, and flange with pins.

4.4 DUCTWORK

A. Prior to fabrication of ductwork and plenums, visit the site and determine the job conditions that will affect the fabrication of the duct. Contractor must adjust location and size of ductwork as necessary to fit the conditions as found at the site.

B. Ductwork Pressure – The ductwork must be designed and fabricated to accommodate the AC package unit’s positive and negative static pressure and air flow velocities.

C. Ductwork Seals – Class A sealed in accordance with SMACA.

4.5 SEALANT AND GASKETS

A. General Sealant and Gasket Requirements: Surface-burning characteristics for sealants and gaskets must be a maximum flame-spread index of 25.

4.6 BACKDRAFT DAMPERS – See drawing AEX-D-ARSR-M009

4.7 TURNING VANES – Shall be large, double vane, min 22 GA, fabricate and installed to SMACNA standards.

4.8 Air Conditioning (AC) Refrigerant Lines - The contractor shall use Hard-Drawn Type “K” copper lines to replace existing liquid and suction lines. Line size shall be as recommended by the AC manufacture. Fittings must be used to obtain the configuration needed for the installation, bending pipe will not be allowed.

4.9 Suction Line Pipe Insulation: - The contractor shall use ASTM C534, Type I, flexible, closed cell elastomeric insulation on suction lines. 1.) Thermal Conductivity: 0.27 at 75 degrees F. 2.) Operating Temperature Range: Minus 70 to 180 degrees F. For outdoor suction piping - The contractor shall install an aluminum field applied jacket over pipe insulation. The jacket shall have a minimum .016 inches thickness. NOTE: The jacket shall be installed as per the manufactures instructions. Insulation jacket is not required for indoor lines.

5 Electrical Requirements Electrical hookup to the units must be done in accordance with the most recent version of the National Electric Code

5.1 General

5.2.1 Ground Requirements

5.2.2 General – All equipment ground conductors must be green color coded, grounding electrode conductor must be green insulated, and sized as specified or indicated, and if not specified or indicated, it must be in accordance with Article 250 of the National Electrical Code. Grounding lugs, connectors and other components must comply with the National Electrical Code.

All neutral conductors must extend from the neutral bus in the device where the active conductors originate. Device terminals for connection of more than one conductor must be specifically designed for that purpose.

5.2.3 Conductors

5.2.3.1 Un-insulated Conductors – Un-insulated conductors must be copper.

5.2.3.2 Insulated Conductors - Unless otherwise indicated insulated conductors must be copper with thermoplastic or thermosetting insulation, type THW, THWN, and XHHW for general use, or type THHN for use in dry locations only, all insulated for 600 volts. Conductors sized 12 AWG and smaller for general use must be solid. Stranded 12 AWG and smaller conductors are permitted when required for specific equipment installations. Conductors 10 AWG and larger may be stranded. Stranded conductors must be UL Listed Class B. Minimum branch circuit conductor size must be 12 AWG. If required specific equipment installations, stranded conductors finer than Class B may be used. Minimum control wire size must be 14 AWG unless otherwise required by manufacturer or noted on drawings. Conductors 12 AWG and smaller are permitted to be stranded in applications where vibration and flexing may be encountered, with compression fittings installed at appropriate ends.

5.2.3.3 Color Coding - All branch circuit and feeder conductors must be color coded as specified hereinafter. The color coding must be continuous throughout the facility on each phase conductor to its point of utilization so that the conductor phase connection is readily identifiable in any part of the installation. The equipment grounding conductor must be covered with green insulation or must be bare copper as specified hereinbefore. Where color coding is not available in the larger size conductors, the conductors must be color coded by use of color coded tape, half lapped for a minimum length of 3 inches. Where conductors are color coded in this manner, they must be color coded in all junction and pull boxes, accessible raceways, panel boards outlets, and switches, as well as at all terminations. Conductors in accessible raceways must be coded in such a manner that by removing or opening any cover, the coding will be visible. Phase rotation in the 3 Phase system must match that which was delivered by the old facility E/G and power company.

Phase conductors must be color coded as follows:

Single Phase

Three Phase

120/240 Volts

120/208 or 240 volts

Line A - Black

Phase A - Black

Line B - Red

Phase B - Red

Neutral - White

Phase C - Blue

Ground - Green

Neutral - White

Ground – Green

5.2.3.4 Connectors, Power Cable -

If required, connections of cable conductors must be made using crimp connectors utilizing a crimping tool designed to make a complete crimp before the tool can be removed.

5.2.3.6 Appearance - Neatly and securely bundle and tie all conductors in an enclosure using nylon straps with a locking hub or head on one end and a taper on the other.

5.3 Raceways

5.3.1 Raceway System - Minimum conduit size must be 3/4-inch, but may be 1/2 inch for exposed control wiring. Each run must be complete, and must be fished and swabbed before conductors are installed. Ends of conduit systems not terminated in boxes or cabinets must be capped. Crushed or deformed raceways must not be installed. Sections of raceways which pass through to damp, concealed or underground locations must be of a type approved for such locations by the FAA COR, and must extend a minimum of 12 inches beyond the damp, concealed, or underground area.

Boxes – If required, boxes must be either the cast metal hub type, or shall be one piece galvanized steel type. Where not sized on the drawings, boxes must be sized in accordance with the NEC. Boxes must be provided in the wiring or raceway system for pulling wires, making connections, and mounting devices or fixtures. Boxes for metallic raceways must be of the cast-metal threaded hub type in wet locations, or surface mounted on outside of exterior surfaces. Each box must have the volume required by the National Electrical Code for the number of conductors in the box. Each outlet box must have a machine screw which fits into a tapped hole in the box for the ground connection. Cast-metal boxes installed in wet locations and boxes installed flush with the outside of exterior surfaces must be gasketed. Boxes must not be supported from sheet metal roof decks.

5.3.2 Conduit – The contractor must purchase and install rigid and flexible conduit.

All exterior CF rigid conduit under this contract will be “GALVANIZED” sized as listed on the drawings and in the specification. All flexible conduit must be “FLEXIBLE METALLIC LIQUID TIGHT CONDUIT” sized as indicated on the drawings and in the specifications. All flexible metallic liquid tight conduit fittings must come with a ground lug for attaching a green insulated # 6 AWG cable (as indicated in the project drawings). All flexible metallic liquid tight conduit shall be 6 feet in length maximum.

5.4 Disconnect Switches

The switch must be fusible, Type HD, Heavy Duty, Single Throw, 240 volt ac, 200 Amp, stainless steel: NEMA 4X, horsepower rated, with clips or bolt pads to accommodate fuses, lockable handle with capability to accept two padlocks, and interlocked with cover in closed position. Switch must come with a ground and neutral kit, both internally mounted. The neutral kit should be mounted and insulated, capable of beinging grounded and bounded.

5.4 Painting and Finishing - Where factory finishes are provided on equipment and no additional field painting is specified, all marred or damaged surfaces must be touched up or refinished so as to leave a smooth, uniform finish at the time of final inspection as directed by the COR.

5.5 Repair of Existing Work - Electrical work must be carefully laid out in advance. Where cutting, channeling, chasing, or drilling of floors, wall partitions, ceilings, or other surfaces is necessary for the proper installation, support, or anchorage of the conduit, raceways, or other electrical work, it must be carefully done. Damage to the building, piping, or equipment must be repaired by skilled mechanics of the trades involved at no additional cost to the Government.

5.7 General - The rules, regulations, and reference specifications noted must be considered as minimum requirements. They must not relieve the contractor from furnishing and installing higher grades of material and workmanship than are specified or then so required by the specification drawings.

5.8 Materials - Materials furnished by the contractor under this specification must be new and the standard product of the manufacturer's latest designs that comply with the specification requirements. Wherever standards have been established by the Underwriters Laboratories, Inc., the materials must bear the UL label.

6. SYSTEM START-UP

6.1 Electrical Checks - Prior to energizing high- or low-voltage circuits to the system, the contractor must inspect all factory and field installed wiring for loose or improper connections. Any improperly installed wiring must be corrected to the satisfaction of the FAA COR. The contractor must check voltage supply at disconnect switches or fuses to determine if voltage is within range listed on the manufacturer's data sheets. The Contractor must Notify the FAA RE if voltage is outside of manufacturer's specifications.

6.2 Energizing System - The contractor must energize the high- and low-voltage circuits on the units in the presence of the FAA COR. The contractor must verify, in the presence of the FAA COR, that the voltage and amperage draw of the condensing and evaporator sections are within ranges listed on the manufacturer's data sheets. If voltage or current is out of tolerance, the condition must be corrected to the satisfaction of the FAA COR. The contractor must verify that all functions of each unit operate properly. Any function that does not operate properly must be corrected to the satisfaction of the FAA COR.

6.3 Vibration Checks - The contractor must check condenser and evaporator fans and units as a whole while running to determine if abnormal vibrations are occurring. Any abnormal vibration must be corrected to the satisfaction of the FAA COR.

6.4 Refrigerant Charge - Contractor must check refrigerant charge of units using refrigerant manifold-gauge set. System charge must be in accordance with manufacturer's recommendations.

7. FINAL INSPECTION

7.1 System Operation - The contractor must demonstrate to the FAA RE that all functions of system are operating properly and in accordance with manufacturer's recommendations for heating and cooling mode.

7.2 Air Filters - The contractor must demonstrate to the FAA RE the method for installing and removing the air filters from the unit.

7.3 System Operating Instruction Manual - The contractor must provide the FAA RE a copy of the operating instruction manual and warranty cards for all major system components at the time of final inspection.

8. DEMONSTRATION

Engage a factory-authorized service representative to train FAA's maintenance personnel to adjust, operate, and maintain units. Overall training time should be no less than 2 hours.

9. System Warranty In addition to parts only warranty offered by unit manufacture. The contractor shall provide a 5-year parts and labor warranty (including refrigerant) for the AC units. In addition to unit warranty, the contractor shall warrant all wall penetration work against leaks for a period of one year.

F. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of packaged terminal and split-system air conditioners that fail in materials or workmanship within specified warranty period. Verify available warranties and warranty periods for units and components with unit manufacturers.

I. Warranty Period for Sealed Refrigeration System (e.g. compressors, TXV/TXX, etc.): Manufacturer's standard, but not less than [five] 5 years from date of Substantial Completion, including components and labor.