Okaloosa County BOCC — March 18, 2014 — Chilled Cooler Contract — reading text

the entire operating range. Unit Controls All unit controls are housed in an outdoor rated weather tight enclosure with removable plates to allow for customer connection or power wiring and remote interlocks. All controls, including sensors, are factory mounted and tested prior to shipment. Microcomputer controls provide all control functions including startup and shutdown, leaving chilled wafer temperature control, evaporator flow proving, compressor or staging and speed control, electronic expansion valve modulation, condenser fan sequencing and speed control, anti-recycle logic, automatic lead/lag compressor starting and load limiting. The UC-800 unit control module, utilizing Adaptive Control microprocessor, automatically takes action to avoid unit shut-down due to abnormal operating conditions associated with low refrigerant pressure, high condensing pressure, AFD/Compressor current overload, low oil return or low AFD cooling, low discharge superheat, and high compressor discharge temperature. Should the abnormal operating condition continue until a protective limit is violated, the unit will be shut down. Unit protective functions of the UC800, include loss of chilled water floe, evaporator freezing, loss of refrigerant, low refrigerant pressure, high refrigerant pressure, high compressor motor temperature, and loss of oil to the compressor. Unit Display A full color TD-7 AdaptiView touch screen display indicates all important unit and circuit parameters, in logical groupings on various screens. The parameters including chilled water set point, leaving chilled water temperature, demand limit set point, evaporator and condenser refrigerant temperatures and pressures, compressor and fan speeds, and all pertinent electrical information. The display also provides on screen trending graphs of predefined parameters as well as customizable trend graphs based on user defined parameters from a list of all available parameters. The display also provides indication of the chiller and circuits top level operating modes with detailed sub-mode reports available with a single key press, as well as diagnostics annunciation and date and time stamped diagnostic history. The standard color display is fully outdoor rated, and, can be viewed in full daylight without opening any control panel doors. Standard power connections include main three phase power to the compressors, condenser fans and control power transformer and optional connections are available for the 115 volt/60HZ single phase power for the thermostatically controlled evaporator heaters for freeze protection. Chilled Water Reset This provides the control logic and factory installed sensors to reset leaving chilled water temperatures. The set point can be reset based on ambient temperature or return evaporated water temperatures. Factory Mounted Flow Proving The factory installed evaporator water flow switch is provided with the control logic and relays to turn the chilled water flow on and off as the chiller requires for operation and protection. Adaptive Frequency Drive All RTAE chillers utilize Tranes Adaptive Frequency Drive, 3rd Generation (AFD3) technology for controlling the compressors. AFD3 is a family of new generation adaptive frequency drives specifically designed for Trane water chillers. AFD3 incorporates the Trane communication protocol enabling seamless integration with the unit controller. AFD3 data such as drive status, temperatures, modes and diagnostic information are accessible to the unit controller and through the TracerTU service tool. AFD3 contains technology that enables the drive to last longer and with less down time. The technology enables operation on various power systems including alternative energy sources. AFD3 will protect itself and the compressor or motor from over current, low or high line voltage, phase loss, incoming phase imbalance, and over temperatures due to loss of drive cooling or loss of panel ventilation. AFD 3 incorporates improved service ability and troubleshooting tools to identify the issue quickly and get the chiller back up and running. All AFD3 control circuits are powered with class 2 low voltage - separate from main power allowing service on the controls with the panel door open. Additionally, the main electronic control modules can be serviced with the standard Trane screw driver. The AFD3 further incorporated another Trane service tool to allow for firmware upgrades through TracerTU. Terminal Block Power line connection type is standard with a terminal block. ShortCircuit Current Rating (SCCR) A short circuit rating offers a measure of safety for what the starter panel enclosure is able to withstand in the event of an explosion caused by a short circuit. Display The display is outdoor capable including an UV Resistant Touch-screen with an operating range between -40.0 F to 158.2 F Operating Temperature. General Notes 1. Caution- Do not energize the unit until check out and start up procedures have been completed. 2. All motors are protected from primary single phase failures. 3. Caution - Trane pump control must be used to provide pump control. Evaporator chilled water pump must be controlled by the chiller output. Failure to comply with this requirement may result in damage of the unit. 4. Single source power is provided as standard on these products field connections are made to IF I wiring requirements. 5. Recommended field wiring connections are shown by dotted lines. 6. Power for the evaporator heater and/or optional convenience outlet is supplied by a common customer provided power supply. Max fuse size is 30 AMPS. When provided. The heaters will use 800VA on 150-165 ton units and 1200VA on 180-300 ton units of the total available supply. 7. Do not run low voltage control wiring (30 volts or less) is conduit with 110 volt or higher wiring. Do not exceed the following maximum run length for a given size: 14 AWG, 5000 FT: 16 AWG, 2000FT; 18AWG, 1000FT. 8. Customers supplied power 115/60/1 PH to power relays max fuse size is 20 AMPS. Ground all customers supplied power supplies as required by applicable codes. Green ground screws are provided in unit control panel. 9. All unit power wiring must be 600 volt copper conductors only and have a minimum temperature insulation rating of 90 degree. Refer to unit name plate for minimum circuit capacity and maximum over current protection device. Provide equipment ground in accordance with applicable electric codes. Refer to wire range table for lug sizes. 10. All field wiring must be in accordance with national electric code and local requirements contact ratings and requirements. 11. All customer control circuit wiring must be copper conductors, only have a minimum insulation rating of 300 volts. Except as noted, all customer wiring connections are made to circuit board mounted box lugs with a wire range of 14 to 18AWG or din rail mounted spring force terminal. 12. Unit provided dry contacts for the condenser/chilled water pump control. Relays are rated for 7.2 AMPS resistive, 2.88 AMPS pilot duty, or 1/3 HP, 7.2F LAAT 120 volts 60HZ. Contacts are rated for 5 AMPS general purpose duty 240 volts. 13. Customer supplied contacts for allowed voltage connections must be compatible with dry circuit 24 bolts DC for a 12ma resistive load. Silver or gold plated contacts recommended. 14. The contacts for auto stop and emergency stop switches are jumped at the factory by jumpers iwl & 1w2 to enable unit operation. Remote control is desired, remove jumpers and connect to the desired control circuit. 15. Solid ovals represent max numbers of conduits and/or cable glands used.  SPECIAL BID CONDITIONS PROJECT DESCRIPTION - Work included under this contract shall include all labor, permits, and materials required to replace the requested Trane Air Cooled Chiller and to extend the chill water supply and return lines to be delivered to the requested site. 2. PRE-BID ACTIVITY A. Bid Information - Questions concerning bid requirements or specifications should be directed to the Okaloosa County Purchasing Department, 602-C North Pearl St., Crestview FL 32536; 850-689-5960. Any changes by the County to specifications shall be in writing in the form of an addendum and furnished to all bidders. Verbal information obtained otherwise will not be considered in awarding of bids. The deadline for submittal of questions and comments on the plans and bid documents will be February 19, 2014 (CST). No additional information will be provided after such time. C. We will hold a mandatory pre bid meeting on February 12, 2014 at 8:00 AM (CST) at the Okaloosa County Jail located at 1200 East James Lee Blvd., Crestview, Florida. All vendors bidding will be required to attend the meeting so they can review the scope of work. 3. PREPARATION OF BID - The bid form is included with the bidding documents. Additional copies may be obtained from the County. The bidder shall submit an original and two (2) copies of the bid form. All bid documents shall be submitted on 8 1/21 x 11' paper unless larger paper is required for clarity, construction plans or rendering, etc. Bid documents should not be stapled or bound. All blanks on the bid form shall be completed by printing in ink or typed in both words and numbers with the amounts extended, totaled and the bid signed. A bid price shall be indicated for each section, bid item, alternative, adjustment unit price item, and unit price item listed therein, or the words 'No Bid", "No Change", or "Not Applicable" entered. No changes shall be made to the phraseology of the form or in the items mentioned therein. In case of any discrepancy between the written amount and the figures, the written amount shall govern. Any bid may be rejected which contains any omissions, erasures, alterations, additions, irregularities of any kind, or items not called for which shall in any manner fail to conform to the conditions of public notice inviting bids. A bid by corporation shall be executed in the corporate name by the president or a vice president or other corporate officer who has legal authority to sign. The corporate seal shall be affixed and attested by the secretary or an assistant secretary. A bid by a partnership shall be executed in the partnership name and signed by a partner (whose title must appear under the signature). The official address of the partnership shall be shown below the signature. A bid by a limited liability company shall be executed in the name of the firm by a member and accompanied by evidence of authority to sign. The state of formation of the firm and the official address of the firm must be shown below the signature. 10  A bid by an individual shall show the bidder's name and official address. A bid by a joint venture shall be executed by each joint venture in the manner indicated on the bid form. The official address of the joint venture must be shown below the signature. All names shall be typed or printed in ink below the signature. The bid shall contain an acknowledgement of receipt of all Addenda, the numbers of which shall be filled in on the form. The address and telephone # for communications regarding the bid shall be shown. If the bidder is an out-of-state