QRC ARSR BID ALTERNATE #1 HVAC STATEMENT OF WORK.pdf

Federal Aviation Administration

INFRASTRUCTURE

ENG. CTR., N.Y.

BID ALTERNATE #1

HVAC STATEMENT OF WORK:

(HVAC-SOW)

03/04/2019

SITE: QRC – Long Range Radar (LRR) LOCATION: Benton, PA PROJECT: Mechanical SOW for Fire/Life Safety and Mechanical Upgrade Project

DATE OF LAST VISIT: 10/19/2017

DESCRIPTION OF WORK:

1. GENERAL:

The QRC ARSR is being converted to an unmanned facility. The existing steam boiler must be decommissioned/removed due to operational concerns. The steam heated air handler located in the E/G room shall be removed due to fire life safety concerns. Electric heating for the reduced facility use shall be installed for cost and operational benefits.

2. PRICE: The contractor shall give a total price to provide all labor and materials to remove the old steam boiler system and, install the following new parts in accordance with the instructions given in 3. through 12. below:

Demolition

(1) Remove and discard boiler and flue stack.

Installation on First Floor:

(1) Heavy Duty 250A/3P MBO power Heat Sub Panel

(1) 250A/3P SQ D I Line breaker

(1) 120/208 V electrical heat power distribution system incl. disconnects

(1) Mitsubishi PEAD-A42AA7 (Heat Pump indoor horizontal ducted)

(1) Mitsubishi PUZ-HA42NKA (Heat Pump outdoor condenser)

(4) Trane UHEC-072AACA (Elec. Unit Heaters)

Installation in Stairway:

(2) Trane UHEC-032AACA (Elec. Unit Heaters)

Installation on Second Floor:

(2) Trane UHEC-032AACA

TOTAL PRICE: _________

3. HVAC: Modifications to the existing HVAC System include but are not limited to the following:

a. The contractor shall hold a current license to practice Electrical Installation in the State of

Pensylvania. The Contractor shall provide the FAA with electrical calculations that describe the power requirements for all equipment listed. Contractor shall include the total power required for water pipe heat tracing and electric unit heaters.

b. Remove the existing 40 BHP steam boiler, associated combustion air intake damper, 8” boiler flue running up the exterior wall, fuel/steam/condensate piping on the 1st floor, boiler makeup water line, condensate tank & pump set, water treatment equipment and drums, control panels, and electrical wiring. All associated wall penetrations will be infilled as required for fire separation and to prevent unwanted infiltration. Perform the following instructions:

a) Provide FAA with a metal waste salvage and recycle plan. Locate the nearest facility licensed to accept metal waste. Contractor shall dispose of all materials in accordance with FAA rules and regulations. All materials shall be recycled to the greatest extent possible.

b) Provide FAA with an electrical lock out tag out safety plan for removing power to B-1.

c) Disconnect power to B-1. Remove all conduit, mounting hardware and, wires from B-1 to Boiler Disconnect switch on wall in Boiler Room. Leave disconnect mounted to wall. Repair all holes in disconnect with suitable U.L. rated plugs.

d) Shut fuel line supply and return safety valves off. Remove all fuel lines from safety valves to B-1.

Prevent spilling any fuel trapped in lines. Collect waste fuel and store in a U.L. & OSHA rated sealed container. Immediately clean up and neutralize any fuel that gets on the floor and, prevent fumes from entering building.

e) Furnish and install a brass MPT square head pipe plug into both the supply and return safety valves to prevent future fuel flow through valve.

f) Shut water supply line off. Drain all water from boiler system throughout the entire building. Water shall be drained to a location outside that allows water to flow away from building.

g) Remove water supply line back to the valve before the feedwater system. Install a brass MPT square head pipe plug into supply side of valve to prevent water flow through valve.

h) Remove all boiler riser, header, equalizer, supply & return lines from the existing branch lines to the boiler. Remove all water lines between the boiler and the feedwater system.

i) Remove flue pipe from B-1. Remove flue from boiler to first elbow on outside wall.

j) Repair the resulting opening in wall with Portland cement mortar and concrete masonry block.

k) Remove all remaining anchors, brackets, hangers, supports and mounting hardware from B-1 and the Feedwater system.

l) Remove B-1 and Feedwater system equipment from boiler room and transport all waste materials to a metal recycling facility.

m) Remove all remaining debris and, broom clean boiler room.

Demolish and remove 18” boiler stack flue pipe from building exterior.

a) Provide FAA with a comprehensive fall protection safety plan. Plan must include a complete description of the proposed equipment and the techniques used for removal of this 100 foot tall stack pipe.

b) Provide FAA with a metal waste salvage and recycle plan. Locate the nearest facility licensed to accept metal waste. Contractor shall dispose of all materials in accordance with FAA rules and regulations. All materials shall be recycled to the greatest extent possible.

c) Remove 18” boiler stack from exterior wall of building. Completely remove stack, cap, anchor bolts, brackets, flanges and associated hardware from building.

c. E/G Room: Remove existing suspended Carrier steam heat air handler, associated ductwork, piping, electrical power and controls. Infill the related wall penetrations with materials to match existing construction and fire rating in coordination with Fire/Life Safety design.

d. E/G Room: There is a wall-mounted Buffalo exhaust fan with a damaged inoperable 3’x3’ gravity damper. The damper stays partially open and is a source of infiltration. The exhaust fan with gravity damper will be replaced with thermostatically controlled equipment of similar size and type.

e. E/G Room: Icing on the fuel pipe line was reported by the site technician. Technicians use a portable heater to keep E/G room warm enough. E/G room should be provided with a ceiling mounted thermostatically controlled electrical unit heater.

f. First Floor: Replace 1st floor heating equipment with a combination of electric unit heaters and an electric heat pump, designed with the overall capacity to maintain ground floor temperatures above freezing during winter design conditions, using ASHRAE design data for Wilkes-Barre, PA. Anticipate the design will call for a single zone heat pump with wall mounted fan coil and outdoor condenser mounted on the existing concrete pad at the SE exposure. N+1 equipment redundancy will be included in the first floor design. Heating equipment will be located and sized for optimal freeze protection and efficiency. Unit heaters will have built-in thermostats to maintain 48 deg F setpoint and to prevent unnecessary heating of the space. All units will be UL listed.

g. Infilling / fire-stopping of existing openings in walls/floors is also required for maintaining proper temperature control in areas to be heated. Coordinate with Fire/Life Safety drawings.

h. Stairway: Minimal heat for the stairway will be provided by either the new ground floor unit heaters (with only the ground stairway door magnetically held open), or by three additional electric unit heater located in the stairway (with all stairway doors kept closed).

i. Second Floor: There is an area that used to be a bathroom next to the pipe chase where existing piping will need freeze protection. The bathroom area has steam heating along with steam piping. This area does have a good size window that can affect inside ambient temperature during cold weather. This area could be provided with a space heating unit.

Minimal electrical heat will be provided in the telecom room on the 2nd floor.

j. Fourth Floor: Existing perimeter steam heating baseboard elements located in the 4th floor office and break rooms will be removed. Note: HVAC design by the TSSC for the admin area will be deleted from the Redundant HVAC project, and NDP will assume responsibility for all new HVAC work in this area.

k. Plumbing water risers up through the 2nd and 3rd floors will be protected from freezing by electric unit heating provided for the pipe shaft.

l. The old abandoned air handling units and associated piping located on floors 2, 3 and 5 will remain abandoned in place. There is currently no program to reuse the floor space they once served.

m. General ventilation will be provided for the 5th floor. Gravity dampers for outside air and exhaust fan outlet will be used in order to achieve ventilation here. Exhaust fans will be operated manually and/or thermostatically for energy conservation purposes. Existing openings in the walls may be utilized for these new installations in order to avoid making new openings in the concrete walls.

n. It is preferable that all HVAC-related abandoned structures and components including ductwork should be removed at a later date, since they are not maintained. Due to environmental impact over the time and in the absence of an inspection, maintenance and surveillance program, the primary components or any supporting structures can fail. Failure of any of these components could lead to personal, structural or equipment accidents. Per the ACM 2016 report, there is no presence of ACM within the abandoned AHUs or ductwork.

Therefore, the removal process for these units will not require any ACM work practices. For the immediate (short term) it is recommended that abandoned ductwork penetrations/openings be sealed off for fire protection / life safety purposes, such as the 58x24 duct penetration through the 3rd floor slab for example.

4. PLUMBING: Modifications to the existing Electrical System include but not limited to the following:

a. First Floor: remove and cap off well water lines running through spaces that are not to be heated, including storage room and boiler feed-water tank room.

b. Fifth Floor Bathroom: The existing unused 5th bathroom will have its toilet, urinal, lavatory and slop sink removed. The associated water supply and sanitary drain piping will be cut back and capped at the 4th floor, leaving the plumbing vents intact. This will eliminate the need to provide freeze protection for this 5th floor piping. The 30 gal. electric water heater located in the 5th floor bathroom will be replaced with a new 19 gal. electric water heater located on the fourth floor bathroom.

c. Plumbing water risers up through the 2nd and 3rd floors will be protected from freezing by either adding electric heating for the pipe shaft or by using electric heat tracing, depending on which method is more practical/reliable.

5. ELECTRICAL: Modifications to the existing Electrical System include but not limited to the following:

a. The contractor shall hold a current license to practice Electrical Installation in the State of

Pensylvania. The Contractor shall provide the FAA with electrical calculations that describe the power requirements for all equipment listed. Contractor shall include the total power required for water pipe heat tracing and electric unit heaters.

b. Contractor shall provide FAA with an electrical lock out tag out safety plan.

c. Contractor shall furnish and install a new Heavy Duty MBO power Heat Sub Panel on the first floor. Heat Subpanel shall be mounted to wall adjacent to main power supply. All electrical subpanel parts shall be equal or better to ones made by Square D.

d. All breakers shall be bolt down type rated SCCR:22KA at 60HZ

e. Buss bars, neutral, and, ground bars shall be copper.

f. Panel dead front cover shall be hinged.

g. Power subpanel shall contain a 250A/3P QD Main Breaker

h. Feeders shall be rated 20A/2P QOB-VH

i. Contractor shall furnish and install a new 250A/3P SQ D I Line breaker that matches existing style in a spare space in Main Panel

j. Contractor shall furnish and install a new power line between Main Panel and Heat Sub Panel.

k. Contractor shall furnish all labor and materials necessary to install power lines to each of the electrical heating devices listed above. All power shall be enclosed inside a minimum of ¾” EMT conduit. All conduit shall be securely connected to the building structure with threaded fasteners. Contractor shall use the shortest route possible between the Heat Subpanel and the individual heaters.

l. Contractor shall submit a complete detailed electrical plan that clearly describes the conduit size and wire size for each individual heating appliance.

m. Contractor shall write the word “HEAT” every 5’ on each conduit in neat letters with a black permanent marker.

n. Contractor shall provide a means of disconnect at each individual heating appliance. FAA will accept a U.L. rated non fused switch or, receptacle & plug installed in accordance with NFPA 70.

o. Contactor shall test each heating appliance after electrical power feed is complete. Initial amperage and voltage readings shall be taken and recorded for each individual circuit.This report will be given to FAA.

6. PUBLICATIONS: The applicable requirements of the latest edition of the following codes and standards shall apply:

a. American Society of Heating. Refrigeration and Air Conditioning Engineering (ASHRAE)

b. NFPA 70 - National Electric Code (NEC)

c. IMC – International Mechanical Code

d. FAA Std-032

e. FAA Std-019f

f. FAA Std-1217f - Electrical Work - Interior

7. ENVIRONMENTAL:

a. Environmental assessment to be performed in areas where construction may disturb existing assemblies. The facility has provided an asbestos report for the facility and care must be taken when completing construction within the facility.

8. SECURITY AND ACCESS TO THE LRR SITE:

a. The contractor and all sub-contractors shall be escorted at all times by the FAA/Contractor on-site representative. The escort will be provided by the RE and/or the site tech.

9. MANUFACTURER'S SPECIFICATIONS AND DRAWINGS:

a. All equipment shall be installed in accordance with manufacturer's specifications and drawings.

All discrepancies are to be reported to the RE for resolution.

10. WORK PERFORMANCE:

a. The contractor shall assure all work is performed and supervised by a trained and qualified person for the trade being performed. The contractor shall insure the certification of all CFC (refrigerant) handlers.

11. ACCEPTABLE WORK:

a. All work performed by the contractor and sub-contractor shall be in accordance with all industry and FAA standards and must be approved by the RE. Contractor shall notify RE, five

(5) days prior to completion of all work for final inspection, and testing for acceptance.

12. DISPOSAL AND SITE CLEAN- UP:

a. The contractor shall remove all debris resulting from construction and secure the site at the end of each day. Refrigerant will be recovered per EPA regulations. Final clean up shall be performed by the contractor upon completion of the job.

13. CONTACTS AND TELEPHONE NUMBERS:

b. Richard Polk Civil Engineer 404-305-7445

c. Russ Classi Mech. Engineer 718-553-3376

d. John Oconner ATO Supervisor 315-374-5105

e. James Horeth SSC Manager 570-655-7511

f. John Ryneski SSC Technician 570-655-7511