MODIFICATION
Z -- HVAC Replacment for Building 602, Welding Shop, at the Earle C. Clements Job Corps Academy, 2302 U.S. Hwy 60 East, Morganfield, KY 42437. Mandatory Walk Through on 11-16-07.
- Notice Date
- 11/7/2007
- Notice Type
- Modification
- NAICS
- 236220
— Commercial and Institutional Building Construction
- Contracting Office
- Department of Labor, Employment Training Administration, Earle C. Clements Job Corps Academy, 2302 U.S. Highway, 60 East, Morganfield, KY, 42437, UNITED STATES
- ZIP Code
- 42437
- Solicitation Number
- AAM102407-A
- Response Due
- 12/28/2007
- Archive Date
- 1/28/2008
- Point of Contact
- Ann Musser, Purchasing Manager, Phone (270)389-5338, Fax (270)389-4400
- E-Mail Address
-
Musser.ann@jcdc.jobcorps.org
- Description
- THIS AMENDMENT IS TO CHANGE THE MANDATORY WALK THROUGH DATE TO FRIDAY, 11-30-2007 AND THE RESPONSE DATE TO FRIDAY, DECEMBER 28, 2007.MANDATORY WALK THROUGH SCHEDULED FOR FRIDAY, 11-30-07, @ 10:00 A.M. Central Standard Time, Building 2435, Conference Room. (SCOPE OF WORK TO BE PICKED UP AT THE SITE VISIT) Please notify Ann Musser of your intentions to attend the Mandatory Walk Through by Phone: 270-389-5338; Fax: 270-389-4400; E-Mail: musser.ann@jobcorps.org. Furnish all labor, equipment, and tools to cover the on-site requirements to accomplish the work as specified herein. Earle C. Clements Job Corps Academy Technical Scope of Services Building 602 Heating and Ventilation Conditions of Service The equipment will supply heat and ventilation air to a 3 bay instructional shop building of approximately 32,000 square feet. One of the three bays is used for plumbing and electrical trade instruction; the other two bays are used for welding training. The building is presently equipped with exhaust systems for the welding booths, which will remain in service. General building heat is supplied by hot water unit heaters, which will also remain in service. Equipment and Services to be furnished by Contractor Removal of the following equipment: Three (3) 4500 MBH Existing boilers Three (3) Existing makeup air heating units Existing system water circulating pumps Selected unit heaters The boilers and air handling units removed become the property of the Contractor, who will be responsible for their disposal. The pumps and unit heaters shall be turned over to the Center maintenance personnel. All other equipment shall remain. Furnishing and installing the following new equipment Two Direct Fired makeup air units, rated at 40,000 cfm and 3 million btu per hour One Direct Fired makeup air unit, rated at 5,000 cfm and 400,000 btu per hour. Three Gas fired high efficiency hot water boilers, rated at 350,000 btu per hour. Controls for boilers and makeup air units. Controls shall be coordinated with new heat control system. One new circulating pump for each boiler, rated at 40 gpm and sufficient head to move 40 gpm through the boiler and system. Motor controls as needed to control the pump. Equipment Detail Specifications Direct Gas Fired Make up air units Provide three (3) direct gas fired makeup air heaters. Each unit shall consist of a housing, with a minimum thickness of 16 gauge, inlet filters, supply air fan and drive, burner, and controls. The blower shaft shall be mounted on sealed, self-aligning ball bearings with grease fittings. The inlet filter section shall be equipped with 2 in. thick pleated filters. The burner shall be made of stainless steel, shall be capable of modulating from 5F to 110F air temperature rise, and warranted by the manufacturer for 5 years. The burners shall be equipped with hot surface ignitors. The makeup air heaters shall be tested and certified to ANSI Z-83.4. The burner shall produce not more than 5 parts per million carbon monoxide, and not more than 0.5 parts per million of nitrogen dioxide over its entire firing range. Two of the makeup air heaters shall be rated at 40,000 cfm, and 3 million btu per hour, and shall be installed to serve the two welding shops. One makeup air heater shall be rated at 5,000 cfm, and 400,000 btu per hour, and shall be installed to serve the plumbing and electrical shop. Contractor shall calculate the static pressure required to move the air through the existing ducts, and shall furnish a fan, motor, and drive suitable for the service. The units shall be sized for a design outside air temperature of 10F, and a design supply air temperature of 80F. The units shall be factory assembled and tested, and shall be equipped with standard safety controls and flame controls, including controls for gas ignition. Contractor shall select the mounting (horizontal or vertical) and arrangement of the units that best fits the existing space. Unit shall be equipped with controls to vary leaving air temperature to maintain constant space temperature. The temperature shall be capable of being varied from a minimum of 55F to a maximum of 80F. The system shall include an economizer control to shut off the heater, and supply filtered air only during warm weather. The makeup air units serving the welding shops shall be interlocked with the welding booth exhaust fans, and will run when the welding exhaust fans run. The unit serving the plumbing and electrical shops will be controlled by a time clock, or from a day-night signal from the new control system. Hot Water Boilers Provide three identical natural gas-fired hot water boilers, one to provide hot water for each bay. Each boiler shall have an output of not less than 410,000 btu per hour, and shall have and efficiency of not less than 88.5% based on the higher heating value at 100% load and 140 water into the boiler and 180F leaving the boiler, and shall have an efficiency of not less than 93.6% at 60% load and 100F entering water temperature and 124F leaving water temperature. Boilers shall be designed for condensing operation when return water temperatures are sufficiently low. Boilers shall be warranted to be free of defects in material and workmanship for a period of not less than one year from date of startup. Heat exchanger and burner to be warranted for not less than 5 years from date of shipment. Install the boilers on 4 in. high concrete housekeeping pads, extending 6 in. beyond the outside of the boilers. Reuse the existing air separators and expansion tanks. Furnish and install boiler combustion air and flue piping in strict accordance with the manufacturer?s requirements. The boiler shall be equipped with an outdoor reset controller and all necessary temperature sensors to control boiler water temperature in accordance with outdoor temperature. This control may be external to the boiler, or may be part of the boiler control system. The boilers shall be installed in strict accordance with the manufacturers instructions. Hot Water Circulating Pumps Furnish and install new hot water circulating pumps to circulate the water through the new boilers, and through the existing unit heaters. Pumps shall deliver not less than 40 gpm at a head sufficient to circulate 40 gpm through the system and the boiler. Pumps shall be close-coupled, in-line centrifugal, back pull out design, with mechanical seals. Motor and impeller shall be removable without disturbing the piping. Pumps shall be bronze fitted with cast iron casings. Provide new motor starters to control the pumps, and interlock the boilers with the pumps, to prevent each boiler from firing until its pump is energized. Control the pumps programmable thermostat for time sequencing day night control, or from the new HVAC control system if it is available. Demolition and Installation Requirements Removal of existing Boilers and Makeup Air Units Remove the boilers and makeup air units from the building. Install permanent caps on the piping connections to the makeup air units. Provide temporary caps at the boiler conections. If the existing power feeds cannot be reused, remove the wire and conduit to the nearest electrical box. If the power supply can be reused, make the electrical connections safe so there will be no contact with them if they are accidentally energized. Lockout the electrical disconnects. Repair any damage caused to the building during removal. The boilers and makeup air units become the property of the contractor, who will be responsible for their proper disposal. Removal of Existing Unit Heaters Remove sufficient existing unit heaters so that a total of 350,000 btu per hour is delivered to the space at a supply water temperature of 140F, and a return water temperature of 120F. Cap the piping where the unit heaters have been removed, and remove the wiring to the nearest electrical box. Coordinate the removal of the heaters with the Center maintenance staff. Arrange the baffles on the heater discharge to minimize drafts. Turn over the removed heaters to the Center maintenance staff. Removal of existing hot water circulating pumps Remove the existing hot water circulating pumps, cap the piping and the electrical connections. Turn the pumps over the Center maintenance staff. Ductwork: The Contractor shall furnish and install any ductwork required to connect the new furnaces with the existing heating systems, and to install the new cooling coils in the existing furnaces. New ductwork shall be galvanized steel, fabricated and installed in accordance with SMACNA standards. Piping: All piping shall be installed in a workmanlike manner, and shall be adequately supported. Lines requiring drainage, such as condensing furnace exhaust lines, shall be sloped in accordance with the manufacturer?s recommendations. Contractor shall connect the furnaces to the existing gas supply, using piping which is compatible with the existing material. All piping shall be in accordance with the National Fuel Gas Code. Any gas piping longer than 6 feet shall be schedule 40 steel, with screwed joints. Provide liquid traps in the gas lines where necessary. Contractor shall connect the condensate drain lines from the equipment to existing drain lines, as necessary. Drain connections can be solvent joined PVC. Drain lines from new condensing furnaces shall be routed to existing drain connections if one is available within 25 feet of the unit. Where there is no drain connection within 25 feet of the unit, the Owner will provide one. Combustion air and venting from condensing furnaces will be provided by the Contractor, using materials which are acceptable to the equipment manufacturer. Contractor shall perform all cutting and patching required to install the vents and combustion air intake. Heating water piping shall be compatible with the existing piping. Pipe 2? and under shall be Schedule 40 steel pipe to ASTM A-53, with screwed fittings. Pipe over 2? shall be Schedule 40 steel to ASTM A-53, with welded fittings. Type L copper pipe with soldered fittings will be acceptable, with solder type in accordance with local codes, and compatible with the pressure in the system at a maximum temperature of 180F. Lead-tin solder is not acceptable. Contractor shall provide ball or butterfly valves as necessary to isolate equipment for service. Shutoff valves in the main supply line shall be tagged open. Contractor shall provide ball or globe valves as necessary to drain the system. Drain valves shall be equipped with hose connections for garden hose. Contractor shall connect the new boilers and new circulating pumps to the existing heating system. Contractor shall connect the system to a source of city water through a suitable backflow preventer to fill the system. New heating piping and fittings shall be insulated with 1? thick fiberglass insulation with an all-service jacket. Fittings shall be neatly finished. Electrical Requirements: The power supply for all equipment is three phase, 120/208 volts. Connect all equipment to existing power supply connections where possible. All wiring to be one to the National Electric Code, or local codes, whichever is more stringent. Provide disconnect switches at all equipment. If the existing switches are in good condition, they may be reused. If they are not in good condition, or if they are not suitable for the intended service, the Contractor shall furnish new disconnect switches. All wiring shall be in EMT or conduit, with the exception of final power connections from the disconnect switches to the equipment, which shall be in flexible, liquidtight conduit. Temperature Controls: The makeup air units for the welding shop will be interlocked with the welding hood exhaust fans for the welding shop, and will run when the exhaust fan runs. The makeup air unit for the plumbing and electrical shop will be controlled from a time clock, which will shut the unit down when the building is unoccupied. During the day, all three units will be controlled to maintain space temperature, with the unit heaters providing supplementary heat as needed. At night, all three makeup units will be shut down, and the unit heaters will be the primary source of heat. The unit heaters will receive a constant flow of supply water. During the day, the unit heater fans will be controlled by the existing room thermostats. One night setback thermostat will be provided for each bay for night time control. This will be a thermostat and time clock combination, which will run the circulating pumps continuously during the day, and will control the circulating pumps in accordance with space temperature at night. During the night cycle, the pumps will run only on a call for heat. Starting the pumps will start the boilers. Since the day thermostats are set at a higher level than the night thermostats, all the unit heater fans will come on, until the night thermostat is satisfied. The boilers will be controlled by the circulating pump motor starters, and will fire when the circulating pumps have been started. During the day, the circulating pumps will run continuously. At night, the pumps will be under control of the night thermostat, and will run as needed to supply night heat. The boiler firing rate will be under control of the boiler outdoor reset control, and will be varied as needed to maintain the supply water temperature scheduled in accordance with outdoor temperature. Control over the unit heaters and over the circulating pumps may be by the proposed new control system, if it is available. If it is not available, provision shall be made in the control system to permit controlling this system with the new system when it becomes available. After equipment startup, the testing and balancing of the system, (Which will preclude any ?Substantial Completion?), the center maintenance personnel are to be trained in the operation and maintenance of the systems. This training should include preventative maintenance training. Three copies of an electronic recording of this training are to be provided to the Center. Contractor will submit shop drawings, equipment and ductwork layouts, specifications and calculations of all new work to the Center and the National Office for approval prior to commencing any installation activity. NOTE: THIS NOTICE WAS NOT POSTED TO FEDBIZOPPS ON THE DATE INDICATED IN THE NOTICE ITSELF (07-NOV-2007); HOWEVER, IT DID APPEAR IN THE FEDBIZOPPS FTP FEED ON THIS DATE. PLEASE CONTACT fbo.support@gsa.gov REGARDING THIS ISSUE.
- Web Link
-
Link to FedBizOpps document.
(http://www.fbo.gov/spg/DOL/ETA/ClementsJCC/AAM102407-A/listing.html)
- Place of Performance
- Address: Earle C. Clements Job Corps Academy 2302 U.S. Hwy 60 East Morganfield, KY
- Zip Code: 42437
- Country: UNITED STATES
- Zip Code: 42437
- Record
- SN01448926-F 20071109/071107225750 (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
(may not be valid after Archive Date)
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