AMENDED SOW - Replace Laundry HVAC BLDG 18.pdf

STATEMENT OF WORK (SOW)

1. Title of Project: Replace AC Chiller, Units, and Drain Pans in Building 18 Laundry Plant.

2. Scope of Work:

Contractor will provide the following:

Product Data - Air-Cooled Condensing Units Model Number RAUJC604B (AHU-1, Soiled Side) Condenser: Air-cooled 60-ton unit @ 460 v / 3 ph Unit ships Dry (refrigerant by contractor) No controls – 115v / 1 ph control panel Standard ambient control cULus approval Non-fused disconnect switch Neoprene isolators (unit) (Fld) 1st Year Parts and Labor warranty whole unit + 2nd thru 5th year compressor parts warranty (No Labor)

General - R410A All air-cooled condensing units shall have scroll compressors and are factory assembled and wired. Each unit shall ship from the factory with a nitrogen holding charge. Units shall be constructed of 14-gauge welded galvanized steel frame with 14 and 16-gauge galvanized steel panels and access doors. Units shall have factory mounted, louvered, full-length steel grilles to protect the condenser coils and piping.

Unit surface shall be phosphatized and finished with an air-dry paint. This air-dry paint finish shall be durable enough to withstand a minimum of 672-consecutive-hour salt spray application in accordance with standard ASTM B117.

Compressors - R-410A Trane 3-D Scroll compressors have simple mechanical design with only three (3) major moving parts.

Scroll type compression provides inherently low vibration. 3-D compressors provide a completely enclosed compression chamber with no leakage paths. The compressor is suction gas cooled, direct drive, 3600 RPM hermetic motors. The Scroll compressor includes a centrifugal oil pump, oil level sight glass, and an oil charging valve.

Refrigerant Management - R-410A Split systems can have significantly more refrigerant than packaged systems and thus require controls to reliably manage this excess refrigerant. Each compressor shall have crankcase heaters installed, properly sized to minimize the amount of liquid refrigerant present in the oil sump during off cycles.

Additionally, the condensing unit shall have controls to initiate refrigerant isolation at system shut down on each refrigerant circuit. To be operational, the refrigerant isolation cycle requires a field-installed isolation solenoid valve on the common liquid line near the evaporator.

Note: Under extreme conditions, R410a refrigerant can present special challenges with piping and system design. Whenever refrigerant line set lengths approach 150 equivalent feet and/or design ambient temperature exceeds 115 degrees F, contact your Trane Account Executive to review application requirements.

Unit Control - R410A Factory provided 115-volt control circuit includes fusing and control power transformer. The unit is wired with magnetic contactors for compressor and condenser motors, three-leg solid-state compressor overload protection, and high/low pressure cutouts. Charge isolation, reset relay and anti-recycle compressor timer is provided. Across-the-line start is standard.

Dual Circuit, Condenser Coils for 40-60 Ton Units - R-410A Condenser coils are dual circuited having an Aluminum Microchannel design. The coils are burst tested, and leak tested. Factory installed liquid line service valves are standard.

Dual Refrigerant Circuit w/Four Capacity Stages for 40-60 Ton Units - R410A Each unit has dual refrigeration circuits. Each circuit has two (2) compressors manifolded together utilizing a passive oil system. Each unit has four capacity stages. Capacity modulation is accomplished by turning compressors on and off.

Condenser Fans - R-410A Condenser fans are direct driven with motors having thermal overload protection and permanently lubricated ball bearings.

No System Control - R-410A No System Control provides a terminal strip for step control provided by others. The system provides internal 3 minute fixed on and 5 minutes fixed off time delays and compressor contactors. Each unit is equipped with a phase loss/reversal/low voltage monitor which protects 3-phase equipment from phase loss, phase reversal, and low voltage. Any fault condition will produce a Failure Indicator LED and send the unit into an emergency stop condition. The system temperature step controller must be field provided and installed.

Note: For No Controls Units Step controllers provided by others, the controller must include 5 minutes on/off interstage timers to coordinate with the units fixed on/off time delay relays.

Standard Ambient Control - R-410A: Standard ambient control allows unit operation from 40 F to 115.

Non-Fused Unit Disconnect Switch - R-410A A non-fused disconnect switch is mounted in the control box and provides for interruption of power for servicing the unit. Lugs are suitable for copper wires only. No overcurrent or short circuit protection is provided for unit by this switch.

Neoprene Vibration Isolators - R-410A Neoprene-in shear isolators are supplied for field installation under the unit base to minimize transmission of unit vibration. The isolators consist of a steel top plate and base completely imbedded in color coded oil-resistant neoprene stock. Mountings have deflection of 1/4".

Field Installed; 30% Bleed Valve TXV Installation shall require use of 30% bleed, Thermal Expansion Valves. Valves shall be field supplied, and field installed. Quantity and size shall be determined by the application.

Note: Liquid line solenoids are required for all applications. Trim solenoids cannot be used.

Product Data - Air-Cooled Condensing Units (Industrial)) Model Number RAUJD124B (AHU-2, Clean Side) Condenser: Air-cooled 120 Ton Unit @ 460v / 3 ph (*needs to be 135-ton unit) No system control (115v / 1 control panel) cULus Approval Non-fused disconnect switch 1st Year Parts and Labor warranty whole unit + 2nd thru 5th year compressor parts warranty (no labor) Refrigerant warranty - first year only Spring isolators (unit) (Fld)

General - R410A All air-cooled condensing units shall have scroll compressors and are factory assembled and wired. Each unit shall ship from the factory with a nitrogen holding charge. Units shall be constructed of 14-gauge welded galvanized steel frame with 14 and 16-gauge galvanized steel panels and access doors. Units shall have factory mounted, louvered, full-length steel grilles to protect the condenser coils and piping.

Unit surface shall be phosphatized and finished with an air-dry paint. This air-dry paint finish shall be durable enough to withstand a minimum of 672-consecutive-hour salt spray application in accordance with standard ASTM B117.

Compressor - R-410A Trane 3-D Scroll compressors have simple mechanical design with only three (3) major moving parts.

Scroll type compression provides inherently low vibration. 3-D compressors provide a completely enclosed compression chamber with no leakage paths. The compressor is suction gas cooled, direct drive, 3600 RPM hermetic motors. The Scroll compressor includes a centrifugal oil pump, oil level sight glass, and an oil charging valve.

Refrigerant Management - R-410A Split systems can have significantly more refrigerant than packaged systems and thus require controls to reliably manage this excess refrigerant. Each compressor shall have crankcase heaters installed, properly sized to minimize the amount of liquid refrigerant present in the oil sump during off cycles.

Additionally, the condensing unit shall have controls to initiate refrigerant isolation at system shut down on each refrigerant circuit. To be operational, the refrigerant isolation cycle requires a field-installed isolation solenoid valve on the common liquid line near the evaporator.

Note: Under extreme conditions, R410a refrigerant can present special challenges with piping and system design. Whenever refrigerant line set lengths approach 150 equivalent feet and/or design ambient temperature exceeds 115 degrees F, contact your Trane Account Executive to review application requirements.

Condenser Fan and Motors - R-410A Vertical discharge direct-drive fans are statically and dynamically balanced. Fan motors are three-phase with permanently lubricated ball bearings, built-in current, and thermal overload protection.

Microchannel Condenser Coil -l R410A Condenser coils are dual circuit having an all-Aluminum Microchannel design. The coils are burst tested, and leak tested. Factory installed liquid line service valves are standard.

Refrigerant Circuit - R410A Each unit has two independent refrigeration circuits with 3 compressors per circuit piped in parallel. Six step capacity control is accomplished through compressor cycling.

Unit Control - R410A Factory-provided 115-volt control circuit includes fusing and control power transformer. The unit is wired with magnetic contactors for compressor and condenser motors. Three-leg circuit breakers are used for overload and short circuit protections. The unit also has high/low pressure cutouts. Charge isolation, reset relay and anti-recycle compressor timer is provided. Across- the- line start is standard.

No System Control - R410A No System Control provides a terminal strip for step control provided by others. The system provides internal 3 minute fixed on and 5 minutes fixed off time delays and compressor contactors. The system temperature step controller must be field provided and installed.

Note: For No Controls units with system temperature step controllers provided by others, the controller must include 5 minutes on/off interstage timers to coordinate with the units fixed on/off time delay relays.

Standard Ambient Control - R410A: Standard ambient control allows unit operation from 40 F to 115 F.

Spring Isolators - R410A Steel spring vibration isolators are supplied, for field installation under the unit, to reduce transmission of vibration to building structure and adjacent areas.

Disconnect non fused - R410A This switch is non-fused and is located inside the unit control box. An external handle allows power disconnection without having to open the control box door. (*needs to be an exterior mounted disconnect;

NEPA rated and waterproof)

Field Installed; 15% Bleed Valve TXV Installation shall require use of 15% bleed, Thermal Expansion Valves. Valves shall be field supplied, and field installed. Quantity and size shall be determined by the application.

Note: Liquid line solenoids are required for all applications. Trim solenoids cannot be used.

Product Data - Performance Climate Changer (CSAA) CSAA021lUA Item: C1 Qty: 1 Tag(s): AHU-1 Unit level options

Indoor unit Unit size 21 2.5in. integral base frame UL listed unit Multiple composite handles/latches Field Provided (mtrs, lights, controls) Controls and VFD/starter No Controls by Trane Supply fan motors wired to external junction box, field provided NEMA

Warranty 1st year Parts warranty – Labor not included

Air mixing section (Pos #1) Air mixing section Door- right side Top and Back damper - high velocity parallel 2in. filter frame MERV 8 Pleated media (Fld)

DX Coil section (Pos #2) Extended medium Stainless steel drain pan DX Cooling coil Refrigerant Type "UF" coil 8 rows 95 fins per foot nominal fin spacing Aluminum fins Delta flo H (Hi efficient) Internally enhanced Cu .016 (0.406 mm) Galvanized steel coil casing

Steam Coil section (Pos #3) Steam Type "NS" coil 1 row 95 fins per foot nominal fin spacing Aluminum fins Galvanized steel coil casing

Fan section (Pos #4) Supply fan 20in. diameter AF, H press Front-top discharge NEMA premium compliant ODP Voltage 460/3 10 max applied hp

1800 RPM

External junction box

Item: C2 Qty: 1 Tag(s): AHU-2 Model Number CSAA050UA Unit level options

Indoor unit Unit size 50 2.5in. integral base frame UL listed unit Multiple composite handles/latches Field Provided (mtrs, lights, controls)

Controls and VFD/starter No controller Supply fan motors wired to external junction box; field provided NEMA

Warranty 1st year Parts warranty – Labor not included

Air mixing section (Pos #1) Air mixing section Back and Top damper - high velocity parallel Top damper - high velocity opposed 2in. filter frame MERV 8 Pleated media (Fld)

DX Coil section (Pos #2) Horizontal coil Stainless steel drain pan Type "UF" coil 6 rows 120 fins per foot nominal fin spacing Aluminum fins Delta flo E (energy efficient) Internally enhanced Cu .016 (0.406 mm) 1/2in. tube diameter (12.7 mm) Galvanized steel coil casing

Steam Coil section (Pos #3) Steam Heating Coil Type "NS" coil 1 row 67 fins per foot nominal fin spacing Aluminum fins Sigma flo fins .031" (0.787 mm) copper tubes 1in. tube diameter (25.4 mm) Galvanized steel coil casing

Access section (Pos #4) Access/blank/turning section

Fan section (Pos #5) Supply fan 27in. dd plenum, 80% width, H press Higher efficiency 2 Fan quantity Plenum fan array NEMA premium compliant ODP NEMA motor hps only 15 x 2 @ 460v 3 ph

1800 RPM

Inverter balance with shaft grounding Front rectangular discharge Motors wired to Fused Overload box

Performance Data - Performance Climate Changer (CSAA) Tags AHU-1 AHU-2

Unit level options

Position

Actual airflow (cfm) 10000 22100

Rigging weight (lb) 2329.9 5311.2

Installed weight (lb) 2329.9 5311.2

Fan section

Position #4 #5

Overall ESP (in H2O) 1.300 1.750

Total static pressure (in H2O) 3.396 3.241

Brake horsepower per fan (hp) - 9.708

Speed (rpm) 1732 1615

Motor hertz (Hz) 60 55

Coil section

Position #2 #3 #2 #3 Entering dry bulb (F) 97.00 25.00 97.00 25.00 Entering wet bulb (F) 73.00 - 73.00 - Leaving dry bulb (F) 53.24 89.82 56.33 82.95 Leaving wet bulb (F) 51.53 - 53.94 - Sensible capacity (MBh) 479.34 - 985.57 - Total capacity (MBh) 690.00 703.00 1384.56 1389.00 Coil face velocity (ft/min) 481 588 451 469 Air pressures drop (in H2O) 0.947 0.222 0.613 0.120

*Note: Proper Air Changes – AHU-2 (clean side): 206,424 ft^3, 10 ach, 34,404 cfm AHU-1 (dirty side): 78,225 ft^3, 10 ach, 13,038 cfm

Mechanical Specifications - Performance Climate Changer (CSAA) Item: C1, C2 Qty: 2 Tag(s): AHU-1, AHU-2

GENERAL

Per ASHRAE 62.1 recommendation, indoor air handling units will be shipped stretch-wrapped to protect unit from in-transit rain and debris.

Installing contractor is responsible for long term storage in accordance with the Installation, Operation, and Maintenance manual (CLCH-SVX07B-EN).

Unit shall be UL and C-UL Listed.

Supply fans within the scope of AHRI Standard 430 are "Certified by the AHRI Central Station Air- Handling Unit (AHU) Certification Program, based on AHRI Standard 430/431. AHRI certified units are subject to rigorous and continuous testing, have performance ratings independently measured and are third-party verified. Certified units may be found in the AHRI Directory at www.ahridirectory.org".

Unit sound performance data shall be reported as sound power. Trane, in providing this program and data, does not certify or warrant NC levels. These levels are affected by factors specific to each application and/or installation and therefore unable to be predicted or certified by Trane. Refer to product data for specific fan footnote references.

Unit Construction All unit panels shall be 2" solid, double-wall construction to facilitate cleaning of unit interior. Unit panels shall be provided with a mid-span, no-through-metal, internal thermal break. Casing thermal performance shall be such that under 55°F supply air temperature and design conditions on the exterior of the unit of 81°F dry bulb and 73°F wet bulb, condensation shall not form on the casing exterior.

All exterior and interior indoor AHU panels will be made of galvanized steel.

Unit Paint Unit to ship unpainted from factory. If required, unit to be painted by 3rd party finisher, or by painting contractor at job site.

Casing Deflection The casing shall not exceed 0.0042-inch deflection per inch of panel span at 1.00 times design static pressure. Maximum design static shall not exceed +8 inches w.g. in all positive pressure sections and -8 inches w.g. in all negative pressure sections.

Floor Construction The unit floor shall be of sufficient strength to support a 300.0 lb. load during maintenance activities and shall deflect no more than 0.0042 inch per inch of panel span.

Unit base Manufacturer to provide a full perimeter integral base frame for either ceiling suspension of units or to support and raise all sections of the unit for proper trapping. Indoor unit base frame will either be bolted construction or welded construction. All outdoor unit base frames shall be welded construction. For indoor units, refer to schedule for base height and construction type. Contractor will be responsible for providing a housekeeping pad when unit base frame is not of sufficient height to properly trap unit. Unit base frames not constructed of galvanized steel shall be chemically cleaned and coated with both a rust-inhibiting primer and finished coat of rust-inhibiting enamel. Unit base height to be included in total height required for proper trap height.

Insulation Panel insulation shall provide a minimum thermal resistance (R) value of 13 ft²-h-ºF/Btu throughout the entire unit. Insulation shall completely fill the panel cavities in all directions so that no voids exist and settling of insulation is prevented. Panel insulation shall comply with NFPA 90A.

Drain Pan In sections provided with a drain pan, the drain pan shall be designed in accordance with ASHRAE 62.1.

To address indoor air quality (IAQ) the drain pan shall be sloped in two planes promoting positive drainage to eliminate stagnant water conditions. Drain pan shall be insulated, and of double wall construction. The outlet shall be the lowest point on the pan and shall be of sufficient diameter to preclude drain pan overflow under normally expected operating conditions. All drain pans connections shall have a threaded connection, extending a minimum of 2-1/2" beyond the unit base, and shall be made from the same material as the drain pan. Drain pan located under a cooling coil shall be of sufficient size to collect all condensate produced from the coil. *As a reference, drain pans should cover entire footprint of AHU, extending at least (2in) past the length of the AHU on all sides.

Access Door Construction Access doors shall be 2" double wall construction. Interior and exterior door panels shall be of the same construction as the interior and exterior wall panels respectively. All doors shall be provided with a thermal break construction of door panel and door frame. Gasketing shall be provided around the full perimeter of the doors to prevent air leakage. Surface mounted handles shall be provided to allow quick access to the interior of the functional section and to prevent through cabinet penetrations that could likely weaken the casing leakage and thermal performance. Handle hardware shall be designed to prevent unintended closure. Access doors shall be hinged and removable for quick easy access. Hinges shall be interchangeable with the door handle hardware to allow for alternating door swing in the field to minimize access interference due to unforeseen job site obstructions. Door handle hardware shall be adjustable and visually indicate locking position of door latch external to the section. Door hinges shall be galvanized. All doors shall be a minimum of 60" high when sufficient height is available, or the maximum height allowed by the unit height. Door handles shall be provided for each latching point of the door necessary to maintain the specified air leakage integrity of the unit. Optionally for indoor AHUs and as standard on outdoor AHUs, outward swing doors are provided with a single handle linked to multiple latching points. An optional shatterproof window shall be provided in access doors as indicated on the plans. Window shall either be single pane, or thermal dual pane, as defined on schedule. Window shall be capable of withstanding unit operating pressures and shall be safe for viewing UV-C lamps.

MIXING SECTION

A mixing section shall be provided to support the damper assembly for outdoor, return, and/or exhaust air.

Dampers Dampers shall modulate the volume of outdoor, return, or exhaust air. The dampers shall be of double-skin airfoil design with metal, compressible jamb seals and flexible blade-edge seals on all blades. The blades shall rotate on stainless-steel sleeve bearings. The dampers shall be rated for a maximum leakage rate of 3 cfm/ft² at 1 in. w.g. complying with ASHRAE 90.1 maximum damper leakage. All leakage testing and pressure ratings shall be based on AMCA Standard 500-D. Dampers may be arranged in a parallel or opposed-blade configuration.

Title 24 The following specifications apply only to units with outside air and return air dampers, with actuators.

The 5-year warranty applies only to these items.

This unit contains Economizer that meets or exceeds all mandatory requirements prescribed by Title 24, including but not limited to:

- 5 yr. parts only warranty

- Successfully tested to 60,000 Actuations

- Less than 10 cfm/sq.ft. of damper leakage at 1" WG per AMCA 500L

Filters Mixing sections shall be provided with a filter rack as indicated in the Product Data and As-Built sections of the submittal.

2-inch pleated media filters made with 100% synthetic fibers that are continuously laminated to a supported steel-wire grid with water repellent adhesive shall be provided. Filters shall be capable of operating up to 625 fpm face velocity without loss of filter efficiency and holding capacity. The filters shall have a MERV 8 rating when tested in accordance with the ANSI/ASHRAE Standard 52.2.

Differential Pressure Gage A differential pressure gage shall be flush mounted with casing outer wall with probes piped to both sides of the filter bank to indicate status. Combination filter frames will be provided with a separate differential pressure gage piped across each of the high-efficient and pre-filter banks. The gage shall be diaphragm-actuated dial-type and shall maintain a +/- 5 percent accuracy within operating temperature limits of the air handler. Range shall be 0 - 2.0 in. w.g.

COIL SECTION WITH FACTORY INSTALLED COIL

The coil section shall be provided complete with coil and coil holding frame. The coils shall be installed such that headers and return bends are enclosed by unit casings. If two or more cooling coils are stacked in the unit, an intermediate drain pan shall be installed between each coil and be of the same material as the primary drain pan. Like the primary drain pan, the intermediate drain pan shall be designed being of sufficient size to collect all condensation produced from the coil and sloped to promote positive drainage to eliminate stagnant water conditions. The intermediate pan shall begin at the leading face of the water-producing device and be of sufficient length extending downstream to prevent condensate from passing through the air stream of the lower coil. Intermediate drain pan shall include downspouts to direct condensate to the primary drain pan. The outlet shall be located at the lowest point of the pan and shall be sufficient diameter to preclude drain pan overflow under any normally expected operating condition.

Casing penetrations supplied for hydronic drain and vents. Piping contractor shall provide extended piping.

No casing penetrations supplied for hydronic drain and vents. If required, piping contractor will need to drill drain and vent penetrations using factory located features provided in coil panel.

Refrigerant Cooling Coils The coils shall have aluminum fins and seamless copper tubes. The fins shall have collars drawn, belled, and firmly bonded to tubes by mechanical expansion of the tubes. Suction and liquid line connections shall extend to the unit exterior. The coil casing may be galvanized or stainless steel. Refer to the Product Data section of the submittal for the coil casing material. The coils shall be proof-tested to 715 psig and leak-tested to 650 psig air pressure under water or equivalent tracer gas leak test. After testing, the inside of the coils shall be dried, all connections shall be sealed, and the coil shall be shipped with a charge of dry air or nitrogen. Suction headers and liquid connections shall be constructed of copper tubing with connections penetrating unit casings to permit sweat connections to refrigerant lines. The coils shall have equalizing vertical distributors sized according to the capacities of the coils. Cooling coil performance is certified in accordance with the AHRI Forced-Circulation Air-Cooling and Air-Heating Coils Certification Program which is based on AHRI Standard 410 within the Range of Standard Rating Conditions listed in Table 1 of the Standard. Certified units may be found in the AHRI Directory at www.ahridirectory.org.

Heating performance for heat pump or condenser mode is not certified. Refrigerant coil tubes are 1/2" [13mm] OD, 0.016" [0.406mm] thick, internally enhanced copper.

NS Steam Heating Coil The coils shall have aluminum fins and seamless copper tubes. Copper fins may be applied to coils with 1-inch tubes. The fins shall have collars drawn, belled, and firmly bonded to tubes by mechanical expansion of the tubes. The coil casing may be galvanized or stainless steel. Refer to the Product Data section of the submittal for the coil casing material. Non-freeze, steam-distributing-type coils shall be provided. Steam coils shall be pitched in the unit for proper drainage of steam condensate from coils. The coils shall be proof-tested to 300 psig and leak-tested to 200 psig air pressure under water. Coil header connections are constructed of cast iron with female connections. Connections do not extend beyond unit casing. Inner tubes shall have orifices that ensure even steam distribution throughout the full length of the outer tube. Orifices shall be directed toward the return connections to ensure that the steam condensate is adequately removed from the coil. Coils are certified in accordance with the AHRI Forced-Circulation Air-Cooling and Air-Heating Coils Certification Program which is based on AHRI Standard 410 within the Range of Standard Rating Conditions listed in Table 1 of the Standard. Certified units may be found in the AHRI Directory at www.ahridirectory.org.

Tube construction shall be a 11/16" OD, 0.031" [0.79 mm] copper inner tube with a 1" OD, 0.031" [0.79 mm] copper outer tube.

ACCESS/INSPECTION / TURNING SECTION

A section shall be provided to allow additional access/inspection of unit components and space for field-installed components as needed. An access door shall be provided for easy access. All access sections shall be complete with a double-wall, removable door downstream for inspection, cleaning, and maintenance. Interior and exterior door panels shall be of the same construction as the interior and exterior wall panels, respectively. All doors downstream of cooling coils shall be provided with a thermal break construction of door panel and door frame.

AF FAN SECTION

The fan type shall be provided as required for stable operation and optimum energy efficiency. The fan shall be a double-width, double-inlet, multiblade-type, airfoil (AF) fan. The fan shall be equipped with self-aligning, antifriction bearings with an L-50 life of 200,000 hours, as calculated per ANSI/AFBMA Standard

9. For any bearing requiring relubrication, the grease line shall be extended to the fan support bracket on the drive side. The fan shall be statically and dynamically balanced at the factory as a complete fan assembly (fan wheel, motor, drive, and belts). The fan shaft shall not exceed 75 percent of its first critical speed at any cataloged speed. Fan wheels shall be keyed to the fan shaft to prevent slipping. The fan shafts shall be solid steel. The fan section shall be provided with an access door on the drive side of the fan. Central Station Air Handling Unit Supply Fan performance is "Certified by the AHRI Central Station Air-Handling Unit (AHU) Certification Program, based on AHRI Standard 430/431. AHRI certified units are subject to rigorous and continuous testing, have performance ratings independently measured and are third-party verified. Certified units may be found in the AHRI Directory at www.ahridirectory.org".

http://www.ahridirectory.org/

DECT-DRIVE PLENUM FAN SECTION

The fan type shall be provided as required for stable operation and optimum energy efficiency. The fan shall be a single-width, single-inlet, multiblade-type direct-drive plenum fan. Motor bearing life of the direct-drive plenum fan shall be not less than L-10 250,000 hrs. Refer to the Product Data section for fan quantity and number of blades selected within each unit. Central Station Air Handling Unit Supply Fans are "Certified by the AHRI Central Station Air-Handling Unit (AHU) Certification Program, based on AHRI Standard 430/431. AHRI certified units are subject to rigorous and continuous testing, have performance ratings independently measured and are third-party verified. Certified units may be found in the AHRI Directory at www.ahridirectory.org" Central Station Air Handling Unit Supply Fans shall be tested and rated in-accordance with AHRI Standard 260 for sound performance.

Fans that are selected with inverter balancing shall first be dynamically balanced at design RPM. The fans then will be checked in the factory from 25% to 100% of design RPM to insure they are operating within vibration tolerance specifications, and that there are no resonant frequency issues throughout this operating range. Inverter balancing that requires lockout frequencies inputted into a variable frequency drive to bypass resonant frequencies shall not be acceptable. If supplied in this manner by the unit manufacturer, the contractor will be responsible for rebalancing in the field after unit installation. Fans selected with inverter balancing shall have a maintenance free grounding assembly installed on the fan motor to discharge both static and induced shaft currents to ground.

On units supplied with plenum or motorized impeller fans, door guard(s) shall be supplied on the access door(s) to the fan and those downstream access door(s) where unintended access to the plenum or motorized impeller fan could occur. Door guard is intended to deter unauthorized entry and incidental contact with rotating components. Refer to the Product Data section for fans with access door guard(s).

Drive Service Factor The drives shall be variable pitch, suitable for adjustment within five percent of the specified speed. The drives shall be selected at a minimum 20 percent larger than the motor brake horsepower (1.2 service factor).

Motor Frame The motor shall be mounted integral to the isolated fan assembly and furnished by the unit manufacturer.

The motor is mounted inside the unit casing on an adjustable base to permit adjustment of drive belt tension (not applicable for direct drive plenum fans). The motor shall meet or exceed all NEMA Standards Publication MG 1 requirements and comply with NEMA Premium efficiency levels when applicable except for fractional horsepower motors which are not covered by the NEMA classification. The motor shall be T-frame, squirrel cage with size, type, and electrical characteristics as shown on the equipment schedule.

Refer to the Product Data section for selected fan motors within each unit.

Two-Inch Spring Isolators Fan and motor assemblies shall be internally isolated from the unit casing with 2-inch (50.8 mm) deflection spring isolators. The isolation system shall be designed to resist loads produced by external forces, such as earthquakes, and conform to the current IBC seismic requirements. Design VFD frequency is less than line frequency. Use caution during startup to ensure the VFD will not operate at the line frequency or ensure that the air delivery system can handle being over-pressurized.

Indoor Units with an External Motor Junction Box The fan section shall have motor leads extended to a factory installed NEMA external junction box to facilitate field supplied starter or VFD wiring and to maintain air leakage integrity of the casing. For units with a full-load amp rating less than or equal to 110 amps, the enclosure shall be a NEMA 1 enclosure.

For units with a full-load amp rating greater than 110 amps, the enclosure shall be a NEMA 4 enclosure.

Refer to the Product Data section for fans with an external motor junction box.

Overload box Overload panel is a factory mounted NEMA type 1 enclosure for indoor units, and NEMA type 4 enclosure for outdoor units. The panel will take one field VFD power input and distribute to 2, 4 or 6 fans. These fans will be protected by manual motor protectors, one per fan. Auxiliary contacts are wired in series to terminal blocks for generic trip signaling. Panel is rated for WYE power systems up to 600V.

Lifting Instructions The air handling units must be rigged, lifted, and installed in strict accordance with the Installation, Operation, and Maintenance manual (CLCH-SVX07G-EN). The units are also to be installed in strict accordance with the specifications. Units may be shipped fully assembled or disassembled to the minimum functional section size in accordance with shipping and job site requirements.

Indoor units shall be shipped on an integral base frame (variable from the standard 2.5" to 8" height) for the purpose of mounting units to a housekeeping pad and providing additional height to properly trap condensate from the unit. The integral base frame may be used for ceiling suspension, external isolation, or as a housekeeping pad. Indoor sizes 3 to 30 will also be shipped with a shipping skid designed for forklift transport. Refer to the unit As Built or Product Data section of the submittal for the base frame height of each unit. All units will be shipped with an integral base frame designed with the necessary number of lift points for safe installation. All lifting lugs are to be utilized during lift. The lift points will be designed to accept standard rigging devices and be removable after installation. Units shipped in sections will have a minimum of four points of lift.

Contractor will provide all electrical, framing, insulation, gypsum board, and tape & float with all shelving.

All work areas will be clean, and all debris will be removed from site.

Vendor/Contractor will be required to obtain a VA Government badge for all work more than 1 day, attend Infection Control Training Class which last about 30 minutes. Allot time for this in cost proposal for this job.

3. Background:

The AC Chillers and Units for building 18 are past their useful life and are beyond repair not can parts be purchased for old equipment here at Kerrville Campus.

4. Performance Period:

180 days from the award date.

5. Qualifications:

Must be certified to work and install all mechanical and electrical systems to be installed.

5. Information Systems Officer, Information Protection:

The contractor will not have access to VA Desktop computers, nor will they have access to online resources belonging to the government while conducting services.

6. Privacy Officer:

The contractor will not have access to Patient Health Information (PHI), nor will they have the capability of accessing patient information during the services provided to the VA.

7. Safety Requirements:

In the performance of this contract, the Contractor shall take such safety precautions as the Contracting Officer may determine to be reasonably necessary to protect the lives and health of occupants of the building. The Contracting Officer shall notify the Contractor of any safety issues and the action necessary to correct these issues. Such notice, when served to the Contractor or his representative at the work site shall be deemed sufficient for the corrective actions to be taken. If the Contractor fails or refuses to comply promptly, the Contracting Officer may issue an order stopping all or part of the work and hold the Contractor in default.

8. Records Manager:

There will be no federal records created, maintained, used or disposition with this contract; regardless of format [paper, electronic, etc.] or mode of transmission [e-mail, fax, etc.]

9. Invoices and Payment

A. Payment to be made monthly, in arrears, following satisfactory performance by Contractor’s personnel and upon receipt of a properly prepared invoice.

B. Contractor shall be required to invoice through the Tungsten System at http://www.tungsten-network.com/us/en/veterans-affairs/. Additional information regarding Tungsten shall be provided upon award.

C. The contract shall have current registration in the System for Award Management (SAM) for this solicitation; URL: www.sam.gov.

D. The invoice MUST be itemized to include the following information. Any information listed below, and not provided on an invoice, will render that invoice incomplete and the invoice will be returned for immediate correction.

• Time period being invoiced for.

• Description of services performed.

• Unit Cost billed.

• Extended amount due.

• Invoice number, date, and.

• Contract and obligation numbers.

10. Government Holidays:

A. The Government hereby provides notice and Contractor hereby acknowledges receipt that Government personnel observe the listed days as holidays:

New Year's Day January 1st Martin Luther King's Birthday Third Monday in January Washington’s Birthday Third Monday in February Memorial Day Last Monday in May Independence Day July 4th Labor Day First Monday in September Columbus Day Second Monday in October Veterans Day November 11th Thanksgiving Day Fourth Thursday in November Christmas December 25th *Juneteenth (new holiday)

B. In addition to the days designated as holidays, the Government observes the following days:

• Any other day designated by Federal Statute

• Any other day designated by Executive Order

• Any other day designated by the President’s Proclamation

C. It is understood and agreed between the Government and the Contractor that observance of such days by Government personnel shall not otherwise be a reason for an additional period of performance, or entitlement of compensation. In the event the Contractor's personnel work during the holiday, they may be reimbursed by the Contractor, however, no form of holiday or other premium compensation will be reimbursed either as a direct or indirect cost, other than their normal compensation for the time worked.

http://www.tungsten-network.com/us/en/veterans-affairs/ http://www.tungsten-network.com/us/en/veterans-affairs/ http://www.sam.gov/

11. Program Office Points of Contact:

Contracting Officer’s Representative (COR): Shawn Henderson, Project Engineer – Engineering Service, Kerrville VA Campus, 830-896-2020 EXT: 12692, shawn.henderson@va.gov

Alternate (COR): John Dolley, Engineer Tech. – Engineering Service, Kerrville VA Campus, 830-896- 2020 EXT: 11080, john.dolley@va.gov mailto:shawn.henderson@va.gov mailto:john.dolley@va.gov

STATEMENT OF WORK (SOW)