College_Park_HVAC__S.O.W__1_.pdf

College Park

9829 Rhode Island Avenue.

Building 1 College Park, Md 20740

Scope of Work: HVAC and BAS System Overhaul

1. Replacement of Rooftop HVAC Units

● Objective: Replace five existing rooftop HVAC units with new, energy-efficient models that meet the building's heating, ventilation, and air conditioning (HVAC) requirements.

● Work Tasks:

○ Unit Removal:

■ Disconnect and remove the five existing HVAC units.

■ Properly dispose of the old units following environmental guidelines and regulations.

○ New Unit Installation:

■ Supply and install five new rooftop HVAC units (specify model, brand, and specifications).

■ Ensure the new units are properly mounted on the roof with appropriate clearance.

■ Install necessary ductwork, wiring, and gas lines (if applicable) to connect each unit to the building systems.

○ Startup and Testing:

■ Conduct a startup procedure for each new unit.

■ Verify that the units are functioning as intended, including temperature, airflow, and pressure settings.

■ Test all safety features, including thermal overload protection and emergency shutdown systems.

■ Provide system performance reports with data on efficiency and air delivery.

2. Balancing HVAC System to Slight Positive Pressure

● Objective: Achieve a slight positive pressure within the building to ensure proper airflow, prevent infiltration of outside air, and maintain indoor air quality.

● Work Tasks:

○ Initial Assessment:

■ Perform an in-depth inspection of the existing HVAC system, including ducts, diffusers, and ventilation units.

■ Measure current airflow and pressure at key points of the system.

○ System Adjustment:

■ Adjust fan speeds and dampers to balance the air distribution.

■ Ensure supply air volume exceeds exhaust air volume to create positive pressure.

■ Adjust return and exhaust systems to prevent air loss.

○ Verification:

■ Conduct airflow tests at multiple points in the building.

■ Monitor pressure readings and verify that the system is operating at a slightly positive pressure, typically 0.05 - 0.10 inches of water column (in.

wc).

○ Final Report:

■ Provide a detailed report on the adjustments made, pressure readings, and airflow measurements.

■ Verify that air quality is within acceptable levels per ASHRAE standards.

3. Complete Overhaul of the BAS System to Ensure Positive Pressure

● Objective: Overhaul the BAS (Building Automation System) to control and maintain slight positive pressure throughout the building and to ensure that the system is operating optimally.

● Work Tasks:

○ System Assessment:

■ Review and assess the current BAS configurations and control algorithms.

■ Ensure that the BAS is integrated with the new rooftop HVAC units and other key building systems.

○ Programming and Calibration:

■ Reprogram the BAS to ensure that it controls the HVAC systems to maintain slight positive pressure.

■ Implement automated adjustments to fan speeds, dampers, and ventilation systems to ensure consistent airflow.

■ Integrate sensors for real-time pressure and airflow monitoring into the

BAS.

○ Sensor and Control System Upgrades:

■ Install and calibrate additional sensors if necessary (e.g., CO2 sensors, pressure transducers) to assist in pressure control.

■ Update the BAS control panels to reflect the changes in the system.

○ Testing and Optimization:

■ Run simulations and tests to verify that the BAS is maintaining positive pressure.

■ Adjust and fine-tune the control system for optimal performance and efficiency.

○ Training:

■ Provide training for building personnel on the operation and maintenance of the updated BAS system.

○ Final Report:

■ Provide documentation of all changes made to the BAS system, including new programming, sensor locations, and system settings.

4. Completion and Documentation

● Documentation:

○ Provide detailed as-built drawings and system diagrams.

○ Provide warranties for all new HVAC units and parts.

○ Submit a comprehensive report of all tests performed, including system performance data and compliance with design specifications.

● Final Inspection:

○ Conduct a final inspection to ensure all work meets the project requirements.

○ Address any deficiencies identified during the inspection.

5. Safety and Compliance

● Ensure that all work is performed in compliance with local, state, and federal safety regulations.

● Adhere to building codes, including fire safety, energy efficiency, and environmental standards.

● Provide a safety plan for roof access, electrical work, and handling of refrigerants.

● All personnel working on the project will be properly certified and trained to handle HVAC systems and BAS technology.

Scope of Work: HVAC and BAS System Overhaul