Renovation of a library in New York, New York. Completed plans call for the renovation of a library.

The Queens Borough Public Library (the Library), hereby solicits proposals from experienced firms and individuals (hereinafter referred to as Bidders) in response to this Invitation for Bid (IFB) to enter into a contract for HVAC Services for the Flushing Community Library. To facilitate communication between the Library and Bidders and to ensure that all Bidders have access to the same information, all information concerning this IFB, including how to submit a bid, will be posted on the Library's website at online. All questions regarding this IFB must be submitted as set forth in the IFB. The Library will post questions and responses on the bid website. We look forward to your interest and participation in this IFB. Sincerely, William R. Funk William R. Funk Director of Procurement Question Acceptance Deadline 07/06/2022 12:00 AM EDT Questions are submitted online Yes 1.0 Queens Public Library - Flushing Public Library Existing Conditions The Flushing public library was established in approximately 1996 and yields a gross area of 75,000 square feet over three floors. A building survey was conducted on December 22, 2021 to observe and document the existing conditions of the existing mechanical heating and cooling system. As it pertains to the heating and cooling plant equipment, the main system components including the utilities are located at the cellar while the cooling towers are at the rooftop. Cameron Engineering documented the hydronic pump room at the cellar and identified the mechanical shaft routing of existing piping to the building zones and rooftop equipment. 2.0 Mechanical System Existing Conditions The main gas service is routed into the cellar gas utility room through the meter and gas booster pump. From the gas utility room gas piping is distributed to the absorption chiller heater room. At the cellar, there are two existing gas-fired 200-ton chiller heaters that route hydronic heating and chilled water piping to an adjacent distribution pump room. The pump room centralizes the distribution of existing hot, chilled and condenser water piping that have been reviewed for integration. Each hydronic system is composed of two pumps and used pressure differential to actuate flow through the radiation elements throughout the building. It is the recommendation of Cameron Engineering that the existing piping is serviceable and in good condition. The condition of the existing pump equipment and trim also appears to be in acceptable condition. Through the vertical piping shaft, two 8-inch condenser water piping risers slightly offset through the roof below the fuel fired generator. The condenser water piping is then diverted to the cooling tower cells with 6-inch supply and return connections at 600 gpm per cell. It is the recommendation of Cameron Engineering that this equipment is close to 200% of the total block heating and cooling load of the building. 3.0 Electrical System Existing Conditions The Library Con Edison electric service is located at the mezzanine between the cellar and the first floor. It is rated for 4,000 Amps, 208/120V, 3 phase, 4 wire. The electrical equipment appears to be good, serviceable condition, manufactured by SquareD and made of switchboard construction. The existing feeder circuit to the rooftop cooling towers is rated for approximately 1,000 Amps. The main electric service switchboard lineup consists of a Con Edison CT metering cabinet, 4,000 Amp main service switch and four (4) distribution sections. The fourth distribution section in the switchboard lineup appears to have space available to accommodate a 1200-amp circuit breaker or bolted pressure switch for the chiller heater. The manufacturer will need to determine the availability space and copper bus detail necessary to add a 1200-amp overcurrent protective device. The respective limited alterations to the existing Fire Alarm system shall be filed and permitted by the installing contractor as required 4.0 Proposed Heat Pump Heating and Cooling Project Scope It is the intent of QPL to not disturb the existing gas fired absorption chiller heaters; all operations of this source equipment are to be disabled and locked out for safety. At a later date DDC in conjunction with QPL will remove the chiller heaters and associated support equipment. The proposed solution consolidates the rooftop equipment to heat pump operation and the electrification method serves to reduce emissions and maintain a centralized heating and cooling system. The heating and cooling function uses the Aermec Model NYK air-cooled reversible modular heat pump. At approximately 26-tons cooling and 347 MBH heating, eight (8) units will replace the existing gas-fired chiller heater and provide both the heating and cooling source operation. As a supplement to the design day heating operation of this system, four (4) Aermec Model WWB0600 units will assure heating capacity up to 176°F hot water leaving temperature down to 10°F outdoor temperature. The supplemental heat pump equipment in this instance would not be rated for outdoor exposure so a Systecon prefabricated equipment system is proposed. The scale of the prefabrication would accommodate all current NYC building code standards leaving plug-and-play connections for hot and chilled water, electric and controls. A single pair of distribution piping will be routed to the existing 8-inch condenser water piping. Automated and manual isolation valves will be located at the cellar pump room and changeover piping will be required between the condenser water risers and the hot and chilled water distribution pumps. Prior to the installation of any new material at the pump room, the condenser water pumps and distribution piping will be removed back to the 8-inch shaft risers. Changeover piping will be required at both the pump room and existing chiller heater room. It is the intent to keep the operation of the zone distribution and downstream element operation the same. It is important to note that a step-up transformer will be required to support the Aermec WWB units as they are only available at 460V / 3 Phase; all other Aermec heat pumps may be pre-wired for the existing 208V / 3 Phase electrical distribution. 5.0 BMS Controls Requirements Modifications to the existing BMS head end will be required to accommodate the designed heat pump heating and cooling solution. The existing BMS head end is a Johnson FX DDC platform that has recently been rehabilitated to accommodate the existing pneumatic pressure controls using EP switches. Control Technologies reviewed with Cameron Engineering the proposed alterations detailed in preliminary schematics and have developed a nominal magnitude of work of which the existing BMS can accommodate. The scope items include; Provide safe off of existing chiller and cooling tower controls from BMS and the respective demolition of control panels, wiring, conduit, pneumatics. Provide new graphic indication and control of added equipment at existing CTI BMS located in the custodian office. A new remote BACnet IP control panel at the roof furnished complete with I/O modules will be required. The new BACnet IP riser cable and conduit will follow the same path as the condenser water piping risers through to the roof. Provide touchscreen interface for local operation of new rooftop equipment. For the chillers, provide BACnet communications to chiller master controller and respective wiring. All automated isolation change-over valves at the cellar pump room will required 120V electrical and control points. Similarly for the boiler equipment, provide BACnet master communications to allow monitoring, disabling and enabling only. Boiler break glass low voltage wiring will be interlocked with the BMS monitoring. 6.0 Electrical Installation Requirements The rooftop air-cooled chiller will require three (3) 3-1/2” conduits. An alternate option is to penetrate the ceiling slab and enter the garage storage room and into the garage to the pad mounted transformer. In the storage room, the conduits will offset horizontally and route up adjacent to column B-2 to the third floor. At the third-floor ceiling the conduits can transverse into the mechanical room 319 which then could penetrate the roof below the rooftop equipment. At the roof the chiller heater array will be powered separately from the mechanical enclosure. The pump room will require minor alterations to support the automatic control valves. For safety, the existing chiller heater must be disabled by the electrical contractor and provided the necessary Lockout Tagout materials at the existing motor control center and associated Main Distribution.