Scope of Work - Section 01 11 00 (amendment 1).pdf

Federal Law Enforcement Training Centers Replace HVAC Equipment at BG0001, BG0217, and BG0614

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SECTION 01 11 00

STATEMENT OF WORK

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM E 2114 (2008) Standard Terminology for Sustainability Relative to the

Performance of Buildings

1.2 DEFINITIONS

Definitions pertaining to sustainable development are as defined in ASTM E 2114, and as specified.

a. "Environmentally preferable products" have a lesser or reduced effect on the environment in comparison to conventional products and services. This comparison may consider raw materials acquisition, production, manufacturing, packaging, distribution, reuse, operation, maintenance, or disposal of the product.

b. "Indoor environmental quality" is the physical characteristics of the building interior that impact occupants, including air quality, illumination, acoustics, occupant control, thermal comfort, daylighting, and views.

c. "Operational performance" is the functional behavior of the building as a whole or of the building components.

d. "Sustainability" is the balance of environmental, economic, and societal considerations.

1.3 SUBMITTALS

A. See Section 01300 - Administrative Requirements, for submittal procedures.

B. Product Data:

1. Published Literature: Indicate dimensions, weights, capacities, ratings, gages and finishes of materials, and electrical characteristics and connection requirements.

2. Filters: Data for filter media, filter performance data, filter assembly, and filter frames.

3. Fans: Performance and fan curves with specified operating point clearly plotted, power, RPM.

4. Electrical Requirements: Power supply wiring including wiring diagrams for interlock and control wiring, clearly indicating factory-installed and field-installed wiring.

5. Unit performance including capacities, pressure drops and operating performance.

C. Shop Drawings: Indicate assembly, unit dimensions, weight loading, required clearances, construction details, field connection details, and electrical characteristics and connection requirements.

D. Manufacturer's Instructions: Include installation instructions.

E. Maintenance Data: Include instructions for lubrication, filter replacement, motor and drive replacement, spare parts lists, and wiring diagrams.

F. Submit manufacturer's installation instructions and factory start-up procedures Government approval is required for all submittals

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1.4 WORK COVERED BY CONTRACT DOCUMENTS FOR BG0001 (AWARD OF THIS PORTION OF

THE PROJECT IS SUBJECT TO AVAILABILITY OF FUNDS – I.E. OPTION ITEM)

1.4.1 BG0001 Project Description – refer to applicable reference drawings and Parts 2 and 3 below.

This portion of the project will replace the following:

Dedicated outside air system equipment consisting of AHU-OA and CU-OA.

System #1 equipment serving the front of the building consisting of AHU-1, CU-1A, and CU-1B.

System #2 equipment serving room 103 (i.e. Armory) consisting of AHU-2 and CU-2.

Exhaust equipment serving the building consisting of EF-1.

System #3 equipment serving the rear of the building consisting of AHU-3 and CU-3 has been replaced recently and is not part of this contract for replacement. During replacement, the refrigerant line sets were reused but this project will replace them.

Once access through the contractor’s gate is obtained each day, access to the condensing unit area on the rear side of the facility will be provided via the rolling security gate adjacent to the armory spaces of the facility remotely by the armory guard.

1.5 WORK COVERED BY CONTRACT DOCUMENTS FOR BG0217

1.5.1 BG0217 Project Description – refer to reference drawings and pictures in attachments.

The contractor shall:

1. Demo, remove, and dispose of two existing two Carrier condenser heat pump units, air handler units, drain pans and disconnect switches and copper line sets in accordance with all contract documents and applicable codes.

2. Demo, remove, and dispose of two one existing Carrier Mini split heat pump condenser units unit, air handlers, drain pans; disconnect switches and copper line sets in accordance with all contract documents and applicable codes.

3. Provide new like in kind Heat Pump Condensers, Air handlers and Mini split Heat Pumps units.

a. New Air Handlers shall meet or exceed technical specifications of existing Air Handlers.

a. New Condensers shall meet or exceed technical specifications of existing Condensers.

b. New mini split heat pump units shall meet or exceed technical specifications of existing

Mini Split units.

c. New heat pump condenser units and mini split heat pump units shall utilize refrigerant such as 410A that is not scheduled for phase-out by the Environmental Protection Agency.

d. New Heat Pump Condenser units shall have condenser fans on top instead of being on the bottom of units.

4. Install new condenser heat pump units including all new copper line sets. Making piping connections to all existing piping, flexible connectors, fittings, insulation, and materials as required to make all connections to new air handlers, condensers and mini splits connections.

5. Provide new Automated Logic controls for just for the equipment being replaced. See attachment # 5 for existing controls. Contractor to ensure all new modules, controllers, sensors, etc required to enable required operation shall be provided and installed. Note: FLETC has a sole source justification for the use Automated Logic controls thru Certified Controls at (904) 384-4013.

Ensure Certified Controls match existing control points.

6. Contractor shall replace fire detection or smoke detection devices in the equipment.

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7. Providing electrical wiring, disconnect switches and conduit from new condensers, air handlers, and mini split units to existing circuit breaker.

8. Contractor shall provide all equipment, machinery, labor, tools, ductwork materials when installing new condensers, air handlers, and mini split units.

9. A manufacturer shall provide start-up and first year parts and labor warranty. Provide startup, and test and balance of new units in accordance with manufacturer’s instructions and reference drawings.

10. Supply 2 spare sets of filters for each unit.

11. Access for inspection and cleaning of the unit drain pan, coils and fans segments shall be provided. The unit shall be installed for proper access. Procedure for proper access, inspection and cleaning of the unit shall be included in the maintenance manual. If an access section is required for proper maintenance, then it shall have double wall, hinged, removable access doors on one side of sections.

12. Provide each air handler an Ebtron GTA 116-PC air monitoring station with probe, sensors, and transmitter. Sensor shall use thermal dispersion technology with two hermetically sealed thermistor probes at each measurement point. Each sensor probe shall be provided with UL plenum rated connecting cable with gold plated contacts. Connecting cable shall be a minimum of 50 feet in length. Sensor calibration data shall be stored in sensor probe. Each sensing point shall independently measure airflow and temperature prior to averaging. Sensor accuracy for airflow shall be +2% of reading. Temperature accuracy shall be +0.15 degrees F over entire operating range. The transmitter shall be microprocessor based and capable of processing up to 16 independent sensing points per location. Transmitter shall operate on 24 VDC and be internally fused and protected. Analog output signals shall be field selectable (0-10 VDC or 4-20 mA). Provide with serial RS-485 interface with field selectable network protocols. All inputs and outputs shall be fused protected and internally isolated from 24 VAC power. The transmitter shall have a digital adjustment for output signal offset/gain and a digital filter for airflow output. Sensor probes shall be constructed of gold anodized aluminum alloy tube with 303 stainless steel mounting brackets. Unit shall be designed for insertion mounting. Total number of probes and sensors per probe shall be determined by manufacturer to provide accuracy in actual configuration.

13. Contractor shall follow the phase plan listed below.

14. Phase 1 : Field investigation of equipment size, mounting, and piping arrangement to prepare for rapid execution.

15. Phase 2. Equipment purchase: Mechanical equipment is a long lead item typically 8-12 weeks.

Contractor shall submit equipment demolition plan, replacement plan and equipment government approval.

16. Phase 3. Demolition and New Construction: Contractor shall begin demolition during October and proceed according to the demolition and replacement plan.

1.6 WORK COVERED BY CONTRACT DOCUMENTS FOR BG0641

1.6.1 BG0641 Project Description – refer to applicable reference drawings and Parts 2 and 3 below.

BG0641 – This portion of the project will replace the following:

Outside air system equipment consisting of AHU-2 and ACCU-2.

System #1 equipment consisting of AHU-1 and HP-1 (consists of two heat pumps).

Exhaust equipment serving the building consisting of EF-1.

Preventative maintenance on the existing equipment located in the mezzanine has proven to be challenging; therefore, AHU-2, ACCU-2, AHU-1, and HP-1 will be replaced with three 4-ton packaged heat pumps (PHP-1, PHP-2, and PHP-3) located outside on the rear side of the building. Exhaust fan EF-1 will be replaced but will remain in the mezzanine.

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1.7 Location

The work shall be located at buildings BG0001 (if awarded), BG0217, and BG0614 on the FLETC, Glynco campus. The exact location will be shown by the Contracting Officer Representative (COR).

1.8 REFERENCE ATTACHMENTS

Applicable to BG0001: BG0001 Reference Drawings

Applicable to BG0217:

#1A - AIR HANDLER

#1B - CONDENSER

#2A - AIR HANDLER

#2B - CONDENSER

#3 - MINI SPLIT

#4 - MINI SPLIT

#5 – M-5 DRAWING

Applicable to BG0614: BG614 Reference Drawings

1.9 WORK RESCHEDULING

Normal duty hours for work shall be from 7:00 a.m. to 5:00 p.m., Monday through Friday. Requests for additional work shall require written approval from the COR five calendar days in advance of the proposed work period.

Contractor shall complete all work within 90 180 calendar days of notice to proceed.

1.10 PROJECT ENVIRONMENTAL GOALS

Contractor shall distribute copies of the Environmental Goals to each subcontractor and the Contracting Officer. The overall goal for design, construction, and operation is to produce a building that meets the functional program needs and incorporates the principles of sustainability. Specifically:

a. Preserve and restore the site ecosystem and biodiversity; avoid site degradation and erosion.

Minimize offsite environmental impact.

b. Use the minimum amount of energy, water, and materials feasible to meet the design intent.

Select energy and water efficient equipment and strategies.

c. Use environmentally preferable products and decrease toxicity level of materials used.

d. Use renewable energy and material resources.

e. Optimize operational performance (through commissioning efforts) in order to ensure energy efficient equipment operates as intended. Consider the durability, maintainability, and flexibility of building systems.

f. Manage construction site and storage of materials to ensure no negative impact on the indoor environmental quality of the building.

g. Reduce construction waste through reuse, recycling, and supplier take-back.

1.11 EXISTING WORK

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In addition to "FAR 52.236-9, Protection of Existing Vegetation, Structures, Equipment, Utilities, and Improvements":

a. Remove or alter existing work in such a manner as to prevent injury or damage to any portions of the existing work which remain.

b. Repair or replace portions of existing work which have been altered during construction operations to match existing or adjoining work, as approved by the Contracting Officer. At the completion of operations, existing work shall be in a condition equal to or better than that which existed before new work started.

1.12 REQUIRED LICENSES AND CERTIFICATIONS

1.12.1 The air conditioning contractor must have a State of Georgia Conditioned Air Contractor License, Class II Unrestricted.

1.12.2 The air conditioning technicians must have an EPA Section 608 Technician Certification – Universal (Type I, II, and III).

1.13 ON-SITE PERMITS

1.13.1 Utility Outage Requests and Utility Connection Requests

Notify the Contracting Officer at least 48 hours prior to starting excavation work. Contractor is responsible for marking and verifying all utilities not marked.

The Contractor shall verify the elevations of existing piping, utilities, and any type of underground obstruction not indicated or specified to be removed. But indicated in locations to be traversed by piping, ducts, and other work to be installed.

Work shall be scheduled to hold outages to a minimum.

Requests for utility outages and connections shall be made in writing to the Contracting Officer at least 2 calendar days in advance of the time required. Each request shall state the system involved, area involved, approximate duration of outage, and the nature of work involved.

1.14 LOCATION OF UNDERGROUND FACILITIES

1.14.1 Notification Prior to Excavation

Notify the Contracting Officer at least 48 hours prior to starting excavation work. Contact Georgia811 utility locate organization 72 hours prior to excavating. Contractor is responsible for marking all utilities not marked by locate service.

PART 2 PRODUCTS

BG0001: Like in kind equipment – refer to reference drawings.

BG0217: Refer to paragraph 1.5 above.

BG0641: Packaged heat pumps (PHP-1, PHP-2, and PHP-3):

Basis of design - 50GCQ Two stage, economizer, carbon dioxide (CO2) demand control Total cooling capacity ~ 47MBH; Sensible cooling capacity ~ 37MBH

Compressor power, cooling ~ 3.5kW, heating ~2.8kW

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Integrated heating capacity ~ 47MBH, auxiliary electrical heat ~ 6.5kW Fan – direct drive, ~1600cfm total, ~300cfm outdoor air controlled by CO2 monitor Voltage-Phase-Hertz – 208-1-60

Exhaust Fan EF-1:

1/10 hp, in line with back draft damper Variable speed (~200cfm to ~800cfm) Speed controlled with space pressure transducer

Voltage-Phase-Hertz – 208-1-60

PART 3 EXECUTION

3.1 BG0001:

3.1.1 Field verify all existing equipment, connections, utilities, dimensions/measurements on site and notify contracting officer of any discrepancies. If new equipment requires modifications of supports, connections, etc…, these modifications are included in this contract. For example, if a new piece of equipment requires a smaller electrical breaker, that is included in the contract.

3.1.2 Hold coordination meeting with all stakeholders within 1 month of notice to proceed.

Schedule shall be coordinated through contracting officer representative to minimize disruption to facility. Demolish existing equipment, pads, etc… to be replaced.

3.1.3 Identify project area with high visible signage and provide temporary construction barriers to keep personnel out of job sites.

3.1.4 Remove and reinstall/replace acoustical tile ceilings and ductwork as required to replace equipment.

3.1.5 Provide new like in kind equipment. New equipment shall meet or exceed technical specifications of existing equipment and reference drawings. New equipment shall utilize HFC R410a refrigerant.

3.1.6 Install new equipment with manufacturer’s specifications and installation instructions. For ease of replacement, locate the air filters (MERV-8 minimum) in the return ceiling grilles for AHU-1 – replace grilles as required.

3.1.7 Demolish existing refrigerant lines (including system#3) and equipment pads (except CU-3).

Provide new above ceiling refrigerant line sets (including system #3) and equipment pads.

Run refrigerant lines through exterior wall above condensing unit area and mount refrigerant lines on exterior walls to go vertically down to condensing unit area. Underground refrigerant lines may be abandoned in place.

3.1.8 Provide manufacturer’s standard control packages.

3.1.9 Provide startup, and test and balance of new units in accordance with manufacturer’s instructions and reference drawings.

3.2 BG0217: Refer to paragraph 1.5 above.

3.3 BG0641:

3.3.1 Field verify all existing equipment, connections, utilities, dimensions/measurements on site and notify contracting officer of any discrepancies.

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3.3.2 Hold coordination meeting with all stakeholders (in person or via teleconference) within 1 week of notice to proceed. Schedule shall be coordinated through contracting officer representative to minimize disruption to facility.

3.3.3 Identify project area with high visible signage and provide temporary construction barriers to keep personnel out of job sites.

3.3.4 Existing air-cooled condensing unit ACCU-2 has been abandoned and may be removed to make room for the new equipment. The two heat pumps (HP-1) are active and must remain in operation until the new equipment is in place and ready for final connections and startup.

Exterior horizontal ductwork along the exterior wall is not permitted; therefore, temporarily relocate existing outdoor units as necessary to place new concrete equipment pad(s) and heat pump(s). Minimize outage time as classroom training will need to be temporarily suspended.

3.3.5 Remove and reinstall/replace acoustical tile ceilings and ductwork as required to replace equipment.

3.3.6 New equipment shall utilize HFC R410a refrigerant.

3.3.7 Install new equipment with manufacturer’s specifications and installation instructions. Size and provide electrical circuits/breakers/disconnects. Provide electrical receptacle at each packaged heat pump. Assume breaker size for each packaged heat pump will be 80amps.

3.3.8 Provide concrete pad for each packaged heat pump. Each pad shall be 10’ x 12’ x 6” thick with #3 rebar 12” on center, each way at mid-depth.

3.3.9 Install insulated rigid ductwork on and thru the exterior wall into the attic unless otherwise specified. Refer to reference drawing M2.1.

a. PHP-1 shall serve the non-classroom areas. Supply ductwork shall be 20x16 and connected to existing 20x16 supply. Cap upstream supply side of ductwork tee above Breakout 103. Return ductwork shall be 16x14 and connected to existing 16x14 return ductwork. Cap downstream side of existing ductwork above Breakout 103.

b. PHP-2 shall serve the classroom area. Supply ductwork shall be 20x16 and connected to existing 20x16 supply above Breakout 103. Return ductwork shall be 16x14 and connected to one of the two existing return grilles.

c. PHP-3 shall also serve the classroom area. Supply ductwork in the attic for PHP-3 may be flexible. Supply ductwork main shall be 20x16 and may transition to 18” diameter in the attic. Connect to the to the two existing center supply diffusers and provide balancing dampers. Blank PHP-2 main supply ductwork tees that served these two diffusers. Provide two additional supply diffusers (match existing), ductwork, and balancing dampers toward the front of the classroom. Return ductwork shall be 16x14 and connected to one of the two existing return grilles.

d. Replace exhaust fan EF-1 and install pressure transducer in corridor.

e. Provide fire alarm relays to break all heat pump and exhaust fan controls for shutdown.

3.3.10 Provide 18” diameter flexible transfer ductwork and grilles (match existing) between the classroom and the corridor ceilings via the attic. Ductwork shall have two 90 degree horizontal bends to prevent sound transmission from one area to the other.

3.3.11 Provide new Automated Logic controls. Contractor to ensure all new modules, controllers, sensors, thermostats, etc required to enable remote monitoring and operation shall be provided and installed. The LGR control module and an electric meter are already installed at the building. FLETC has a sole source justification for the use of Automated Logic controls thru Certified Controls at (904) 384-4013.

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3.3.12 Provide startup, and test and balance of new units in accordance with manufacturer’s instructions and reference drawings. Design flows at each register will be calculated and provided by the Government once all equipment selections are made and approved.

3.3.13 Demolish all existing equipment, ductwork, pads, electrical circuits, etc… not used in new work.

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ATTACHMENTS FOR BG0217

Attachment #1A Air Handler

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Attachment #1B Condenser

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Attachment #2A Air Handler

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Attachment #2B Condenser

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Attachment #3 Mini Split – deleted (4-ton mini split has already been replaced)

Attachment #4 Mini Spilit

1 TON MINI SPLIT

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