8-Exhibit D - Scope of Work - Office HVAC.pdf

The Housing Authority of the City of Alameda (AHA) is requesting bids for five (5) rooftop HVAC package unit replacements and one (1) uninstallation, removal, and reinstallation. The work shall be completed in coordination with a separately contracted roofing contractor performing roof replacement at the same location during the same project period. The anticipated duration of onside work is five (5) consecutive days, subject to weather and field conditions.

SCOPE OF WORK

PACKAGE UNIT REPLACEMENT

• Provide all necessary crane and rigging services for the safe removal of existing rooftop equipment and installation of new equipment. Assume (2) crane and rigging mobilizations (1 to remove and 1 to install) 2-3 days apart to allow for the roofing contractor to complete their work.

• Disconnect existing HVAC equipment from gas, electrical, and plumbing systems; remove and properly dispose of old equipment, including recycling of refrigerant in accordance with Section 608 of the Clean Air Act.

• Allow 2-3 days for the roofing contractor to complete roofing and associated flashing replacement at this location.

• Set and secure new HVAC equipment onto existing roof curbs and structural supports or install a new curb if required.

• Reconnect and install all required gas, electrical, and plumbing connections to the new equipment.

• Install new condensate drain lines from the equipment to the existing roof drainage termination points.

• Replace existing fused electrical disconnects with new code-compliant, outdoor-rated disconnects.

• Perform full system start-up, testing, and verification to ensure proper and safe operation of all equipment.

Equipment to be Replaced:

Equipment Model Description Quantity BRYANT- 10 TON BCPG582LPM180 GE/10T/180k/230-3 - 208V/3Ph/60Hz 1 BRYANT- 5 TON BCPB582LLP12M180 GE/5T/108k-1/230-3 208V/3Ph/60Hz 3

Docusign Envelope ID: 46DCC97E-2839-87CB-80D3-AA12C9C3F847

LENNOX GOLD

HEAT PUMP - 3

TON HORIZONTAL

R-454B

EL19KPV

CONDENSING UNIT

STANDARD PERFORMANCE, HIGH-EFFICIENCY,

VARIABLE SPEED AIR HANDLER

- ECOBEE PREMIUM THERMOSTAT (2) AND ZONING ARE

INCLUDED

- INCLUDE REFRIGERANT LEAK DETECTION SENSOR AND

SHUTDOWN CONTROL

- MERV 13 5 INCH CAB HORIZONTAL

- AQUAGUARD SAFETY SENSOR & EXISTING

REFRIGERATION LINE HOOK UP

- NEW ELECTRICAL DISCONNECT

- CHECK AND MINOR SEALING OF DUCT SYSTEM (AS

NEEDED) 1

Equipment below does not need replacement. However, it will need to be disconnected, uninstalled for roofing work and re-installed.

Equipment Model Description Quantity Outdoor Unit Single Zone 12,000 BTU Mitsubishi MUZWR MUZ-WR12NA-U2 Condenser (Removal and Reinstallation only) 1

REQUIREMENTS

1) SUBMITTALS AND PERMITS

i) Contractor shall submit the following for review and approval, and obtain all required permits:

(a) Staging and material storage plan

(b) Unit submittal (prior to ordering). The submittal must be provided within Fourteen (14) calendar days of the Notice to Proceed. After the units have been ordered, contractor shall provide a written confirmation with the estimated delivery date for the equipment.

(c) Applicable city business license and building permit.

REMOVAL

ii) Disconnect and remove the five existing rooftop unit air conditioning units, including associated curb adapters, ductwork connections, gas piping, and electrical wiring.

iii) Properly dispose of all equipment in accordance with applicable codes and environmental regulations.

iv) Protect existing ductwork and repair any damage caused by removal process.

2) NEW EQUIPMENT INSTALLATION

v) Provide all necessary crane and rigging services for the safe removal of existing rooftop equipment and installation of new equipment.

vi) Disconnect existing HVAC equipment from gas, electrical, and plumbing systems; remove and properly dispose of old equipment, including recycling of refrigerant in accordance with Section 608 of the Clean Air Act

vii) Set and secure new HVAC equipment onto existing roof curbs and structural supports, or install a new curb if required.

viii)Reconnect and install all required gas, electrical, and plumbing connections to the new equipment.

ix) Install new condensate drain lines from the equipment to the existing roof drainage termination points

x) Replace existing fused electrical disconnects with new code-compliant, outdoor-rated disconnects.

xi) Perform full system start-up, testing, and verification to ensure proper and safe operation of all equipment.

2) CONNECTIONS

i) Modify or reconnect to existing supply and return ducts.

ii) Extend, reconnect, or modify gas lines with shutoff valve and union.

iii) Reconnect electrical power and control wiring. Upgrade breakers or conductors as needed to match the new unit MCA and MOP requirements.

3) STARTUP & TESTING

i) Perform equipment startup per manufacturer requirements.

ii) Verify proper operation of heating, cooling, economizer, ventilation functions and overall system.

iii) Adjust airflow and confirm each unit delivers proper CFM.

iv) Test demand control ventilation and CO2 sensors.

v) Coordinate with the City for required permitting inspection.

4) COMMISSIONING AND TURNOVER

i) Provide basic training on operation and maintenance to ownership.

ii) Submit equipment manuals, warranties, and startup checklist.

iii) Minimum warranties: 1 year for parts and labor; 5 years for compressors; 10 years for heat exchanger.

5) WARRANTY REQUIREMENTS

The Contractor shall warrant all labor, equipment installation and materials. Minimum warranty periods:

Item Warranty

Workmanship 2 Years

Equipment Manufacturer Standard Warranty

Refrigerant Leaks 2 Years

Electrical Connections 2 Years

Gas Connections 2 Years

Condensate Piping 2 Years

Service Location:

Repair services shall be provided by the contractor on all equipment and associated devices related to the HVAC systems at the following location:

Building Address

Alameda Housing Authority – Main Office 701 Atlantic Ave. Alameda, CA 94501

FEE SCHEDULE

Bid Table: Please complete the Bonfire Bid Table HVAC Unit Replacement Cost Proposal Template under Files.

BIDDER QUALIFICATIONS

1) Minimum five years of commercial HVAC experience

2) Valid California C-20 license.

3) DIR registration.

4) Successful completion of at least three similar rooftop replacement projects within the past 5 years.

CHANGE ORDER PROCEDURE

No extra work shall begin without written approval from AHA. Unauthorized work shall not be compensated. If unforeseen conditions are encountered, the Contractor shall:

i) Immediately notify AHA.

ii) Suspend only the affected portion of the work if necessary.

iii) Submit a written request for change order, including the description of condition, cause, proposed solution, cost breakdown and the impact of the time.

iv) Await written approval before proceeding.