DRAFT_STATEMENT_OF_WORK.pdf

National Weather Service Central Region Headquarters Heating, Ventilation, and Air Conditioning Replacement

Statement of Work May 22, 2018

1.0 General

1.1 Background

The mission of the National Weather Service (NWS) is to provide local weather forecasts and warnings for the protection of life and property and the enhancement of the national economy.

The NWS Central Region Headquarters located in Kansas City, MO maintains 38 Weather Forecast Offices (WFO) throughout 14 states in the Central United States. Each WFO is designed to provide local weather forecasts and warnings critical to the NWS mission and utilizes a Radar Data Acquisition (RDA) site connected to the WFO to process this information. To maintain operational readiness, this statement of work will provide for a comprehensive turn-key program to install new Heating, Ventilation, and Air Conditioning HVAC) units at the WFO and co-located RDA sites for both Fibrebond Manufactured concrete shelter buildings and the interconnected WFO equipment room.

1.2 Agency Objectives

1. To provide consistent service level and workmanship throughout all weather forecast offices primarily in the Central Region.

2. Maintain WFO and RDA building integrity through HVAC replacement process to ensure National Weather Service meets its mission.

1.3 Scope of Work

Contractor shall provide all resources necessary to accomplish the tasks described in this Statement of Work (SOW) and shall apply to all task orders issued under this contract for HVAC equipment replacement.

1.4 Period of Performance

The period of performance of this contract shall be for a one-year base period and four one-year option periods, for a maximum five-year period of performance from date of award.

1.5 Place of Performance

Task Orders shall be primarily performed at any Weather Forecast Office located within the Central Region at the discretion of the NWS. Weather Forecast Offices may be located on Department of Commerce owned sites or government leased sites. Task orders may also be issued for other NWS Regions.

DRAFT

2.0 Specific Tasks

This SOW contains four separate tasks. NOAA and NWS shall choose different SOWs and sites for each task order issued.

2.1 Task One – RDA Roof Top Units (RTU) Replacements:

a. Objective: This tasking will provide replacement Heating, Ventilation, and Air Conditioning (HVAC) roof top units (RTU) and controls to the RDA site.

b. Scope of Work: The scope of work will encompass the removal of the existing RDA HVAC pad mounted units, existing Trane Controller, associated external ductwork and its proper disposal. Contractor shall furnish and install two Bard, or name-brand equivalent, wall-mounted AC units left and right application (1- Model W60L2-B09TPXXXJ and 1- Model W60A2 - B09TPXXXJ) or newer equivalent model each with 9 kW heat strips and economizer. The following are equivalent salient characteristics for the name-brand or equal HVAC unit:

Self-contained, air cooled, exterior wall mount unit One unit with a left hand control panel and one unit with a right hand control panel R-410A refrigerant

9.0. EER

5 ton, 230/208/3 phase 60 HZ 9kW heat strip Economizer controlled with dry bulb control 2" pleated filters Dirty filter alarm Unit must fit existing cast in place concrete openings without modifications Supply duct to fit a 30" X 10 1/2" opening Return duct to fit a 30" X 16" opening. Distance between supply and return is 29 3/4"

Contractor shall install a new appropriate Bard MC 4001-BC Lead/Lag controller or newer equivalent model for above units and integrate AC alarms with the RDA alarm system at each site. The following are equivalent salient characteristics for the name-brand or equal HVAC controller:

Power supplied from A/C #1 and/or A/C #2 Isolation circuitry: no line or low voltage phasing required.

Backup power: connection for -24VDC or -48VDC (-20 to -56V Digital display: 4-character LCD Temperature display: F or C AC outputs: Form A (NO) relays (1A @ 24VAC) Cooling control stages: 2 for each A/C unit (4 total) Heating control stages: 1 for each A/C unit, 2 for each heat pump Dehumidification circuit Locking feature, so no unauthorized changes to programming can be made Operating temperature range: 0 to 120F (-18 to 49C) Storage temperature range: -20 to 140F (-29 to 60C) Temperature accuracy: +/- 1F from 60-85F (16-30C) +/- 1% outside 60-85F Lead/lag changeover time: 0 to 30 days Timing accuracy: +/- 1%

Inter-stage time delay: 10 seconds between stages Inter-stage differential: Adjustable Cooling set point range: 65 to 90F (18 to 32C) Comfort setting-Cooling 72F, Heating 68F, for 1 hour Dead band (difference between cooling and heating set points): 2F to 40F (1C to 24C) Fire/smoke interface: standard NC circuit jumper Generator run feature to inhibit lag A/C unit from operating if generator is operating Memory: EEPROM Space temperature sensors: 1 local is standard, will accept up to 2 optional 35-foot remote sensors LEDs for basic controller: Lead unit, cooling stages 1 through 4, heating stages 1 through 4, dehumidification operation Controller Enclosure: 20-gauge pre-painted steel

Alarms include compressor fail on unit 1 and unit 2, and dirty filter alarm. Furnish and install sensors and cables needed for Bard CMC-30 dirty air filter switch or newer equivalent model.

Contractor shall verify proper system operations according to manufacturer specifications upon completion.

Place of performance: Radar Data Acquisition (RDA) site, per task order.

Period of Performance: Completion of this project shall be accomplished within 45 days of notice of proceed authorized by Contracting Officer. If any delays are expected, the Government Contracting representative shall be notified as soon as possible to coordinate the modification.

- END OF TASK ONE SOW -

2.2 Task Two – RDA Wall-Mounted Unit Replacements

(HVAC) and Control to the RDA site.

b. Scope of Work: The scope of work will encompass the removal of the existing RDA Bard units, existing Bard Controller and its proper disposal. Contractor shall furnish and install two Bard, or name-brand equivalent, wall-mounted AC units left and right application (1- Model W60L2-B09TPXXXJ and 1- Model W60A2 - B09TPXXXJ or newer equivalent each with 9 kW heat strips and economizer. The following are equivalent salient characteristics for the name-brand or equal AC units:

Self-contained, air cooled, exterior wall mount unit.

One unit with a left hand control panel and one unit with a right hand control panel R-410A refrigerant

9.0. EER

5 ton, 230/208/3 phase 60 HZ 9kW heat strip Economizer controlled with dry bulb control 2" pleated filters Dirty filter alarm Unit must fit existing cast in place concrete openings without modifications.

Supply duct to fit a 30" X 10 1/2" opening Return duct to fit a 30" X 16" opening. Distance between supply and return is 29 3/4"

Contractor shall install a new appropriate Bard MC 4001-BC Lead/Lag controller or newer equivalent model for above units and integrate AC alarms with the RDA alarm system at each site. The following are equivalent salient characteristics for the name-brand or equal HVAC controller:

Power supplied from A/C #1 and/or A/C #2 Isolation circuitry: no line or low voltage phasing required Backup power: connection for -24VDC or -48VDC (-20 to -56V Digital display: 4-character LCD Temperature display: F or C AC outputs: Form A (NO) relays (1A @ 24VAC) Cooling control stages: 2 for each A/C unit (4 total) Heating control stages: 1 for each A/C unit, 2 for each heat pump Dehumidification circuit Locking feature, so no unauthorized changes to programming can be made Operating temperature range: 0 to 120F (-18 to 49C) Storage temperature range: -20 to 140F (-29 to 60C) Temperature accuracy: +/- 1F from 60-85F (16-30C) +/- 1% outside 60-85F Lead/lag changeover time: 0 to 30 days Timing accuracy: +/- 1% Inter-stage time delay: 10 seconds between stages Inter-stage differential: Adjustable Cooling set point range: 65 to 90F (18 to 32C) Comfort setting-Cooling 72F, Heating 68F, for 1 hour Dead band (difference between cooling and heating set points): 2F to 40F (1C to 24C) Fire/smoke interface: standard NC circuit jumper

Generator run feature to inhibit lag A/C unit from operating if generator is operating Memory: EEPROM Space temperature sensors: 1 local is standard, will accept up to 2 optional 35-foot remote sensors LEDs for basic controller: Lead unit, cooling stages 1 through 4, heating stages 1 through 4, Dehumidification operation Controller Enclosure: 20-gauge pre-painted steel

Alarms include compressor fail on unit 1 and unit 2, and dirty filter alarm. Furnish and install sensors and cables needed for Bard CMC-30 dirty air filter switch or newer equivalent model, as stated Contractor shall verify proper system operations according to manufacturer specifications upon completion.

Place of performance: Radar Data Acquisition (RDA) site, per task order.

Period of Performance: Completion of this project shall be accomplished within 45 days of notice of proceed authorized by Contracting Officer. If any delays are expected, the Government Contracting representative shall be notified as soon as possible to coordinate the modification.

Place of Performance: Radar Data Acquisition (RDA) site, per task order.

- END OF TASK TWO SOW -

2.3 Task Three – TPMS Marvair Replacements

(HVAC) and Thermostat to the TPMS Shelter located at the Radar Data Acquisition (RDA) site.

b. Scope of Work: The scope of work will encompass the removal of the existing TPMS Marvair unit with the existing thermostat and properly dispose of equipment. Contractor shall furnish and install a new Marvair wall-mounted HVAC unit (model number AVPA24ACA050CU-A5-100 or newer equivalent model Marvair ComPac II, 2-ton wall-mount air conditioner, 208/230v, single phase, 60 Hz, 5 kw electric heat, factory installed economizer, R410 refrigerant, telecom controls including low ambient cooling, beige cabinet or brand-name equivalent . The following are equivalent salient characteristics for the name-brand or equal AC units:

R-410A refrigerant

9.0. EER

24000 BTUH, 208/230 single phase 60 HZ 5kW heat strip Economizer controlled with dry bulb control.

Unit must fit existing cast in place concrete openings without modifications.

Supply duct to fit a 20" X 8" opening Return duct to fit a 20" X 12" opening. Distance between supply and return is 20 11/16"

Contractor shall furnish and install an 8” supply grille, and a 20”x 12” return grille. Install a non-programmable thermostat. Integrate the hydrogen gas detector/sensor into the controls of the unit. Install items per statement of work and in accordance with the manufacturer’s instructions.

Contractor shall verify proper system operations according to manufacturer specifications upon completion.

c. Place of Performance: Radar Data Acquisition (RDA) site, per task order.

d. Period of Performance: Completion of this project shall be accomplished in 45 days of negotiated start date. If any delays are expected, the Government Contracting representative shall be notified as soon as possible to coordinate the modification.

- END OF TASK THREE SOW –

2.4 Task Four – WFO Liebert Replacements

(HVAC) and Controls to the Weather Forecast Office (WFO).

b. Scope of Work: Evacuate and properly dispose of refrigerant in two Liebert units located in server room and remove units. Remove corresponding condensing units on the exterior and dispose of all old equipment. Repair raised floor where the equipment disposed of was located.

Supply and install (2) new 6-ton Bard AC unit, Model #W6RV2-S15BPXXXX if WFO is 208 Volts 3 phase and (2) New 6-ton Bard AC unit, Model #W6RV2-T15BPXXXX or newer equivalent model if WFO is 460 Volts 3 phase or equivalent. The following are equivalent salient characteristics for the name-brand or equal AC units:

R-410A refrigerant Operate in outdoor temperatures ranging from -40 degrees F to 131 degrees F.

Digital scroll compressor that can continuously modulate capacity from 20% to 100% Crankcase heater Phase rotation monitor 6 ton, multiple voltages 15kW heat strip Blank off plate to prevent outside air from entering condition space

c. Place of Performance: Various Weather Forecast Offices per task order.

d. Period of Performance: Completion of this project shall be accomplished in 45 days of negotiated start date. If any delays are expected, the Government Contracting representative shall be notified as soon as possible to coordinate the modification.

e. Additional Information: Contractor shall provide dust containment in the computer room when preforming the work. Contractor shall be responsible for all required electrical to connect to existing load center. All conductors shall be run in conduit, where required by code. Properly test system to meet or exceed manufacturer’s requirements. Properly test, check and start system.

New units shall be installed in accordance with manufacturer’s installation instructions provided with unit, work properly, and function as designed when installation is completed. All cabling installed shall be plenum-rated. The contractor shall clean up any work areas at the end of each day. The system shall be self-normalizing after a loss of power. Room must be conditioned at all times during project. Do not take down second Liebert until first 6-ton wall-mount unit is installed and fully functional.

Installation Instructions

Wall mounting information

1. Two holes for the supply and return air openings must be cut through the wall as shown.

2. On wood frame walls, the wall construction must be strong and rigid enough to carry the weight of the unit without transmitting any unit vibration.

3. Concrete block walls must be thoroughly inspected to insure that they are capable of carrying the weight of the installed unit.

Mounting the unit

1. These units are secured by wall mounting brackets which secure the unit to the outside wall surface at both sides. A bottom mounting bracket, attached to skid for shipping, is provided for ease of installation, but is not required.

2. The supply air duct flange and the first 3 feet of supply air duct require a minimum of 1/4 inch clearance to combustible material for model series W3R/LV, W5R/LV and W6R/LV. However, it is generally recommended that a 1-inch clearance is used for ease of installation and maintaining the required clearance to combustible material.

3. Locate and mark lag bolt locations and bottom mounting bracket location.

4. Mount bottom mounting bracket.

5. Hook top rain flashing, attached to front-right of supply flange for shipping, under back bend of top. Remove packaged control panel door from return opening. Use the instructions in the package to mount the door on the unit after it has been attached to the wall (Step #7). Disregard this step if already supplied with outer control panel door.

6. Position unit in opening and secure with 5/16 lag bolts; use 7/8 inch diameter flat washers on the lag bolts.

7. Secure rain flashing to wall and caulk across entire length of top.

8. For additional mounting rigidity, the return air and supply air frames or collars can be drilled and screwed or welded to the structural wall itself (depending upon wall construction). Be sure to observe required clearance if combustible wall.

9. On side-by-side installations, maintain a minimum of 20 inches clearance on the control panel side of the unit to allow access to control panel and heat strips, and to allow proper airflow to the outdoor coil. Additional clearance may be required to meet local or national codes.

Clearances Required for Service Access and Adequate Condenser Airflow

Model or equivalent Left Side Right Side

W3RV2 15” 20”

W3LV2 20” 15”

W5RV2, W6RV2 20” 20”

W5LV2, W6LV2 20” 20”

Note: For side by side installation of two (2) W*RV models there must be 20" between units.

This can be reduced to 15" by using a W*LV model (left side compressor and controls) for the left unit and W*R (right side compressor and controls) for right unit.

Minimum Clearances Required to Combustible Materials

Model or equivalent Supply Air Duct First Cabinet

W3R/LV2 1/4” 0”

W5R/LV2

W6R/LV2

1/4” 0”

10. Must install lintels at the supply and return openings. The steel for the lintel for the openings shall be a minimum of 3 inches x 3 ½ inches x ¼ inches with the 3 ½ inches being matched to the brick horizontal surface. The lintel shall extend a minimum of 3 inches beyond each side of the opening. Steel for lintels should conform to ASTM A36, Standard Specification for Carbon Structural Steel. Lintels should be shop coated with a rust-inhibitive paint, made of corrosion resistant steel or treated with a coating to provide corrosion resistance.

11. Install through wall supply & return sleeve duct for the new HVAC units. Outfit the entire inside wall opening with 20 gage sheet metal. Duct sleeves must be sealed with mastic at all joints, as well as insulated to prevent air or moisture from entering the wall cavity.

12. AC wall unit must be anchored to interior grade ¾” plywood. Use 5/16” threaded rod with sleeves through the bricks to prevent damage to the bricks.

13. Install (2) 6 Ton Unit programed to Lead Lag.

14. Use the electrical circuity from the inoperable Lieberts.

15. Patch, prep and paint walls to match existing, as needed.

16. Repair the raised floor where the Liebert units used to be.

END OF SOW –