HVAC_CONTROLS_SOW.pdf

Statement of Work (SOW) Heating and Cooling Direct Digital Control System Upgrade and Additions

Alexandria Forestry Center Kisatchie National Forest

April 2018

Existing Conditions

1. The heating and cooling systems for the facility were installed in the 1960’s

2. Pneumatic controls system is obsolete.

3. Some valves have been replaced with incorrect sized equipment.

4. Heating controls must be managed manually due to failing sensing equipment.

Figure 1: Leaking Pneumatic 3-way control valve, Boiler Room

Figure 2: Leaking pneumatic 3-way control valve, AHU1

Figure 3: Pneumatic pressure monitoring/control board, AHU2

General.

The project involves:

Design and commission of all equipment and controls into new graphics package. Installation of energy management systems, sensors, actuators, main controllers, chilled control valves, and hot water control valves. System testing and verification of performance. Systems operations and maintenance training.

1. The contractor shall supply all material, labor, tools, equipment, cranes, vehicles, supplies, incidentals, supervision and safety measures to complete the project.

2. The contractor shall be responsible to verify the necessary quantities of materials to be supplied.

3. Hours of work shall be anytime between the hours of 6:00am to 5:00pm Monday thru Friday, unless otherwise approved by the Contracting Officer. Potable water, electrical power, and toilet facilities are available at the project site.

4. All work shall be done in accordance with manufacturer specifications, OSHA and this document.

5. All wiring shall be compliant with the National Electric Code, and present good workmanship.

Products.

• Government furnished property: None.

• Contractor furnished products: All. Including but not limited to the following:

o Computers o Software o Graphics trends pages and configuration pages o Duct and wall temperature sensors o Electronic actuators o Electronic controlled three way valves o Fittings and piping as necessary o Insulation compatible to piping and ductwork application o Space sensors as required for zone temperature control o Option control board for chilled water supply o Water pipe temperature sensors o Program controls of cooling tower fan o Program controls for boilers

Location.

USDA Forest Service Kisatchie National Forest, Supervisor’s Office 2500 Shreveport Highway Pineville, LA 71360 31.356823, -92.434088

Figure 4: VICINITY MAP

Figure 5: AREA MAP

Execution: Contractor coordination.

1. The Contractor shall schedule a pre-construction meeting a minimum of two weeks prior to starting their operations.

2. The Contractor shall provide shop drawings, product submittals and tentative schedule of operations for review by the Contracting Officer during the pre-construction meeting.

3. Shop drawings shall indicate plans for product assembly. Provide plan views, elevations, cross sections, details and schematics as necessary to represent assembly.

4. Product submittals shall be complete with manufacturer’s specifications for installation and recommended applications and capacities of operations.

5. The Contractor’s schedule of operations shall consider phasing installations so that the piping and valve work of the hot water system is completed between May and September so that a complete shutdown is possible without disruption to building occupants.

6. The Contractor’s schedule of operations shall consider phasing installations so that the piping and valve work of the chilled water system is completed between November and February so that a complete shutdown is possible without disruption to building occupants.

7. The Contractor shall coordinate with the Government to have any vehicles moved which may hinder contractor operations.

8. The Contractor will remove all debris, rags, waste material; tools etc. from the project site at the end of each work day and properly dispose of offsite. No evidence of contractor operations shall be notable outside the contractor’s actively working locations at any time.

9. The Contractor shall receive prior approval for ALL drilling and coring operations from the designated Forest Service maintenance mechanic.

10. Joint inspection of piping and isolation valve condition by the Contractor and Forest Service shall be conducted upon disassembly of control valve sites.

11. Contractor shall schedule entry into any occupied office a minimum of one week in advance.

Execution: Controls installation.

1. Contractor to verify pneumatic fire suppression system remains intact and undisturbed while disconnecting heating and cooling pneumatic control hoses.

2. Contractor to field verify all control valve sizes match incoming and outgoing piping.

3. Web Based Front End

a. Furnish and install a new integrated monitoring and management control system for energy, and HVAC systems.

b. Totally independent of JAVA software.

c. Provide new compatible laptop workstation.

d. Design all new graphics, trends pages and configuration pages.

4. AHU-1 through 6

a. Design and commission all equipment and controls into new graphics package.

b. Replace all duct and wall temperature sensors.

c. Replace pneumatic zone damper actuators with electronic actuators.

d. Replace the chilled and hot water valves and pneumatic actuators with electronic.

e. Re-pipe new valves and re-insulate as needed.

f. Perform joint inspection of isolation valves.

g. Repair / replace dampers and louvers to fresh air grills.

h. Verify performance and sequence of operation.

5. AHU-13 and (4) Hot Water Zone Reheats package.

b. Replace all duct and wall temperature sensors.

c. Add new space sensors to control all four zones independently.

d. Replace the chilled and hot water valves and pneumatic actuators with electronic actuators.

e. Re-pipe new valves and re-insulate as required.

f. Perform joint inspection of isolation valves.

g. Verify performance and sequence of operation.

6. AHU-14

package.

b. Replace all duct and wall temperature sensors.

c. Add a duct discharge air temperature sensor.

d. Verify performance and sequence of operation.

7. Slab Reheat package.

b. Replace all pipe and wall temperature sensors.

c. Replace the hot water valve and pneumatic actuators with electronic.

d. Re-pipe new valves and re-insulate as required.

e. Perform joint inspection of isolation valves.

f. Verify performance and sequence of operation.

8. Chilled water system package.

b. Replace outdoor air and pipe temperature sensors.

c. Furnish, install and program new Trane option board for outdoor reset of chill water supply temperature.

9. Condenser water system package.

b. Replace pipe temperature sensors.

c. Add points and programming to control start/stop and status of cooling tower fan.

10. Hot water system package.

b. Replace pipe temperature sensors.

c. Furnish, install and program new BACnet Gateways for each Aerco boiler.