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TO: Mayor Thomas J. Weisner
FROM: Jim Pilmer, Director of Neighborhood Standards
DATE: December 2, 2014
SUBJECT:
Requesting approval for cooling modifications to the 911 Center Room, C304 and the Electrical Room, C208 at the Aurora Police Department Headquarters.
PURPOSE:
The modifications of the HVAC will provide improved climate control for the 911 Center. The cooling for the electrical room will provide improved conditions and extend the life cycle for the equipment and batteries that maintains critical surveillance equipment.
BACKGROUND:
During warmer temperatures, in the late fall through the early spring the climate control in these rooms are increased with heat from the building system. Manual control of the air dampers along with fans is the method to cool these areas to a comfortable level. Kluber Architects & Engineering was hired in June with a Professional Services Contract to investigate, engineer and design a solution. The drawings and bid specifications were published with a Request for Proposal on September 21, 2014, a Mandatory Pre-Bid Meeting on October 1, 2014 with a Public Bid Opening on October 15, 2014. Thirteen (13) companies picked up plans and bid specifications. Nine (9) returned qualified bids. The bids ranged from low at $165,600.00 to high of $202,000.00. The low bidder was Amber Mechanical Contractors, Inc of Alsip, Illinois. Kluber preformed a Bid Qualification and Scope Review on October 17, 2014 and has found Amber Mechanical Contractors, Inc is qualified to perform the work.
DISCUSSION:
During investigation for the engineering of a solution for the issue it was best determined the following scope of work. 1. Modification of the existing air handling unit from chilled water cooling coil to Dx cooling coil. 2. Modification to the existing air handling unit control sequences and building automation graphics. 3. The addition of split system computer room air conditioning unit. 4. Removal and ad...
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