Attachment A Scope of Work (SOW) Oxnard School District OSD 2018 HVAC Project for Five (5) Schools Phase 2

Transcription

1 Attachment A Scope of Work (SOW) Oxnard School District OSD 2018 HVAC Project for Five (5) Schools Phase 2 SCOPE OF WORK The Design-Build Contractor shall provide all of the necessary engineering, material procurement, management, labor, materials, tools, equipment, supplies, services, components, and disposal and comply with the contract s General Conditions to successfully complete the replacement of existing HVAC units scope of work to the satisfaction of the Owner. This project is funded by Proposition 39 and emphasizes energy savings. All replacement units shall meet the minimum efficiency requirements shown in the specifications. Work shall be performed at the following location(s): 1. Curren Elementary School (1101 North F Street, Oxnard, CA 93030) 2. Kamala Elementary School (634 West Kamala Street, Oxnard, CA 93033) 3. Fremont Middle School (1130 North M Street, Oxnard, CA 93030) 4. Sierra Linda Elementary School (2201 Jasmine Street, Oxnard, CA 93036) 5. Thurgood Marshall Elementary School (2900 Thurgood Marshall Drive, Oxnard, CA 93036)

2 Curren Elementary School General Description of Requirements Furnace Units Demolish existing 29 Lennox Furnace Units. Contractor shall haul and recycle removed units. Procure and install 29 new higher efficiency like-for-like furnace with minimum 95% thermal efficiency New gas lines New furnace flue pipe Ducting and Air Distribution Re-use existing air distribution network Test and balance all modified systems as needed Perform duct leak remediation only if required by 2016 Title 24 Standards and Regulations, Section 110 (or prevailing Title 24) for compliance Controls Reuse existing thermostats Commissioning Commission new Furnace Units

3 Kamala Elementary School General Description of Requirements Furnace Units, Portable Units, and DCV Furnace o Demolish existing 27 Lennox Furnace Units. Contractor shall haul and recycle removed units. o Procure and install 27 new higher efficiency like-for-like furnace with minimum 95% thermal efficiency o New gas lines o New furnace flue pipe Wall Mount Portable HVAC Units o Demolish existing 2 Marvair Portable Units. Contractor shall haul and recycle removed units. o Procure and install 2 new higher efficiency like-for-like wall units with minimum efficiency SEER 15 Ducting and Air Distribution Re-use existing air distribution network Test and balance all modified systems as needed Perform duct leak remediation only if required by 2016 Title 24 Standards and Regulations, Section 110 (or prevailing Title 24) for compliance Contractor to verify precise quantity of DCV controllers to be installed. Modify quanitities depicted in Attachment C: Funding Summary as appropriate. Controls Reuse existing thermostats Implement CO2 Demand Control Ventilation (DCV) to reduce ventilation fan duty cycle during periods of low occupancy for classroom and office spaces Commissioning Commission new Furnace units Commissioning of DCV and economizer operation shall adhere to applicable 2016 Title 24 Code requirements for ventilation (or prevailing Title 24).

4 Fremont Middle School General Description of Requirements Furnace Units Demolish existing 58 Lennox Furnace Units. Contractor shall haul and recycle removed units. Procure and install 58 new higher efficiency like-for-like furnace with minimum 95% thermal efficiency New gas lines New furnace flue pipe Ducting and Air Distribution Re-use existing air distribution network Test and balance all modified systems as needed Perform duct leak remediation only if required by 2016 Title 24 Standards and Regulations, Section 110 (or prevailing Title 24) for compliance Controls Reuse existing thermostats Commissioning Commission new Furnace units

5 Sierra Linda Elementary School General Description of Requirements Chilled Water Plant Replacement Electrical Demolition: o Disconnect and remove motor control panel feeding existing chiller o Remove all conduit and existing motor control panel, as necessary. o Disconnect control wiring at existing chiller back to existing BAS control panel. o Disconnect feeder to existing chiller and remove conduit and cable back to motor control panel, as necessary. Mechanical Demolition: o Remove existing McQuay ALR050C 50T chiller o Remove 20HP Chilled Water Pump o Isolate, drain and disconnect chilled water lines, chiller, pump, air separator, expansion tank, etc. as needed. Mechanical Installation for new chiller and chilled water pump: o Furnish and install (1) new 50 Ton chiller, meet minimum Title 24 efficiency standard o Furnish and install (1) new 20HP chilled water pump. o Install new piping/fittings as necessary. o Insulate new chilled water piping. o Provide pipe markers with type of service and direction flow arrows as required. o Install new taps for pressure gauges and thermos wells at the new chilled water pump suction and discharge lines. o Furnish and install new temperature sensors at the chilled water pump suction and discharge lines. o Replaced any other ancillary equipment required for satisfactory chiller operation not explicitly mentioned in this SOW. Electrical Installation for new chiller and chilled water pump: o Install new feeder to the new chiller from the main switchboard. o Connect new chiller to the existing BAS system. o Provide new conduit and cabling form the existing BAS control panel to new chiller. o Install new 20 HP VFD for new pump, with outdoor rated NEMA 3R enclosure. o Provide new feeder from the existing fused switch in the main switchboard. o Provide load side wiring from the VFD to the new chilled water pump.

6 Thurgood Marshall Elementary School General Description of Requirements HVAC Equipment No change to HVAC equipment Ducting and Air Distribution No change to duct distribution network Controls Re-use existing air distribution network Thermostat options o Install new thermostat with DCV Sensor Relay and ventilation control o Install independently operating DCV Sensor Relay and ventilation control New units shall be equipped with an economizer and Demand Control Ventilation (DCV) where indicated in Design-Build Drawings and shall adhere to applicable 2016 Title 24 Code requirements for ventilation (or prevailing Title 24). Test and balance all modified systems as needed Contractor to verify precise quantity of DCV controllers to be installed. Modify quanitities depicted in Attachment C: Funding Summary as appropriate. Commissioning Test all economizers and re-commission economizer operations as deemed necessary. o Test reports of economizers required for ALL units o Commissioning reports required for repaired economizers Commissioning of DCV and economizer operation shall adhere to applicable 2016 Title 24 Code requirements for ventilation (or prevailing Title 24).

7 Remarks For cases in which the Scope of Work and applicable Code conflict, Code shall prevail. In cases where Code and Safety Conflict, Contractor shall immediately inform and consult with Construction Project Manager for guidance. Verification of Details This scope of work, the associated drawings and specifications are provided to the Design-Build Contractor for information purposes only. Designer-Build Contractor assumes all the responsibility for site verification of equipment for replacement with high-efficiency units, controls and other items required to successfully complete the HVAC replacements and meet the necessary building and safety codes as more fully described in the specifications and general conditions. Design-Build Contractor shall become familiar with details of work in the field and shall advise OWNER of any discrepancy prior to performing any tasks, including but not limited to existing and proposed equipment quantities, building and area locations, etc. The Design-Build Contractor shall thoroughly investigate and satisfy itself of the conditions affecting the work prior to construction start. For rooftop mounted equipment Weights of existing units are best estimates available. It is the responsibility of the contractor to find HVAC units that meet the energy performance requirements while not exceeding the existing unit weights by more than 5%. If the contractor is unable to find the units that meet the above stipulation, the Design-Build Contractor will immediately inform and consult with the Construction Project Manager for guidance. Design Submittal Requirements The Design-Build contractor shall obtain all required approvals and permits prior to proceeding with the installation of the work in this scope. Design-Build Contractor is responsible for the review of electrical specifications, equipment performance specifications, and related design criteria prior to the purchase of equipment, materials and installation of the work. Design-Build Contractor shall submit the following information considered as the Design Submittal. Material Product Submittals Provide submittal for EACH proposed equipment type: o Manufacturer o Model o Rated efficiency o Options o Quantity o Cut sheets o Product warranties (submitted within 10 days from Notice to Proceed).

8 Closeout Documents Design-Build Contractor shall meet all requirements of the General Conditions for closeout; Design-Build Contractor shall provide to the District the following document prior to Closeout: List of Manufacturers with contact information and parts reordering information for all products installed. As-built drawings of newly installed HVAC equipment replacements and thermostats (as applicable) installations at each site Manufacturer warranty forms Commissioning Reports for all aforementioned scope of work including, but not limited to: a. DCV controls b. Economizer recommissioning c. Chilled Water Plant d. Wall Units e. Furnace Units