INVITATION TO BID FAILURE TO SIGN WILL DISQUALIFY BID Bid No.: #GK-MECH-YARD ADDENDUM NO. 1

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1 INVITATION TO BID FAILURE TO SIGN WILL DISQUALIFY BID Bid No.: #GK-MECH-YARD ADDENDUM NO. Signature City Zip Due Date: May, 04 at 3:00 P.M. Show bid opening and bid invitation number in lower left hand corner of sealed bid envelope and return sealed bids to: Printed Name VENDOR NAME AND ADDRESS Name of Firm PHONE/FAX Phone Stephen F. Austin State University P. O. Box 3030, SFA Station 4 Wilson Drive Mailing Address FAX Nacogdoches, Texas Phone (936) FAX (936) (See.3 reverse side) City State Zip See Instruction.0 on Back for Vendor ID Number Delivery in Days Cash Disc. % Days Is Vendor a State of Texas certified HUB? Yes Check all that apply if Preference Claimed under Rule 34 TAC 0.38 Products of persons with mental or physical disabilities Supplies, materials or equipment: produced in TX/offered by TX bidders* Agricultural products grown in TX Agricultural products offered by TX bidders* Products made of recycled, remanufactured, or environmentally sensitive materials Energy efficient products Rubberized asphalt paving material USA produced supplies, materials or equipment Recycled motor oil and lubricants Products produced at facilities located on formerly Products and services from economically depressed contaminated property or blighted areas *By signing this bid, bidder certifies that if a Texas address is shown as the address of the bidder, bidder qualifies as a Texas resident Bidder as defined in Rule 34 TAC IF QUOTING OTHER THAN THE REFERENCED ITEM(S) BELOW, BROCHURE AND/OR SPECIFICATIONS SHOULD BE ENCLOSED. ALL BIDS WILL BE CONSIDERED F.O.B. DESTINATION UNLESS OTHERWISE NOTED. AWARD NOTICE: Stephen F. Austin State University (SFASU) reserves the right to make an award on the basis of low line item bid, low total of line items, or in any other combination that will serve the best interest of SFASU and to reject any and all bid items in the sole discretion of SFASU. Item No. Description Qty. & Unit Unit Price Extension Quote price on quantity and unit of measure, extend and show total. If error in extension, unit price shall govern. Items for state use are exempt from state sales and federal excise tax. Do not include tax in your bid. ADDENDUM NO. THIS ADDENDUM MUST BE ACKNOWLEDGED IN ORDER FOR THE RESPONSE TO RECEIVE CONSIDERATION. FAILURE TO ACKNOWLEDGE THE ADDENDUM WILL RESULT IN DISQUALIFICATION OF THE RESPONSE. PRE-BID MEETING/SITE VISIT SIGN-IN SHEETS The sign-in sheets from the mandatory pre-bid meeting/site visit held 4/3/4 are attached. CHANGE IN INVITATION TO BID OPENING DATE The Bid Due Date/Time has change to 05/0/04 3:00PM SPECIFICATIONS Completed Date changed to August 5, 04. All factory authorized startup shall be scheduled and completed before completion date.

2 STEPHEN F. AUSTIN STATE UNIVERSITY INVITATION TO BID #GK-MECH-YARD CONTINUED SFA will supply chill water to Hall 5 & 8 from additional source during construction. As new cooling towers startup contractor shall assist with chill and condenser water change over. Contractor laydown and parking areas shall be located around the mechanical building and across the street at concrete surface lot. Contractor shall supply, coordinate factory startup and installation of two new 300 Ton Evapco cooling towers according to data sheets, drawings and specifications. Exception to the vendor plans: Rotate the East tower s discharge nozzle location shown by 90 degrees clockwise. Rotate the West tower s discharge nozzle location shown by 90 degrees counter-clockwise. QUESTIONS Q: Are the vertical turbins coming out? A: Yes, and the sumps will be filled in.

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5 April 5th, 04 To: Interested Bidders 609 W. Campus Circle Dr., Suite #00 Irving, Texas Office (97) Fax (97) Project: GK Mech Yard Cooling Tower Engineer: Scott and Strong Architects For pricing and information on the cooling tower for this project contact Mike Merrill and Bill Blair with Texas AirSystems. Mike Merrill Bill Blair of 4/4/04

6 Cooling Tower Data Sheet SFA Project : SFA Tower 5 and 8 Equipment Reference: Product Type : AT/UT/USS Cooling Tower Bill Blair Selection Criteria Capacity (Tons): Capacity (MBH): 4, Fluid Type: Water Flow (GPM): Entering Fluid Temp ( F): 95.0 Leaving Fluid Temp ( F): 85.0 Wet Bulb ( F): 79.0 Date: /9/03 Page: IBC Design Criteria Seismic Design Force (g) g Velocity Pressure (psf) up to 60 CTI Certified Cooling Tower Qty Model Capacity Percent Capacity (Tons) USS All Weights, Dimensions and Technical Data are Shown per Unit Overall Length: Overall Width: Overall Height: Fans: # Fan HP: 5.00 (460/3/60) # kw: 4.00 Air Flow (CFM) 7,800 Inlet Pressure Drop (psi):.8 Evaporated Water Rate (gpm): 7.0 Options Selected Fan Motor: Inverter Capable, Premium Efficient EVAPAK Fill IBC Compliant up to g 3-Probe Electronic Water Level Control Package El. Heaters (0F / -8C ambient) () 4 kw Contactor w/transformer and Disconnect for Heater Package Vibration Switch 304 Stainless Steel Cold Water Basin 304 Stainless Steel Upper Ladder '.750'' 8' 5.500'' ' 8.750'' Operating Weight (lbs): 9,470 Shipping Weight (lbs): 5,60 Heaviest Section (lbs): 3,960 evapselect Version: March 03

7 SECTION COOLING TOWERS PART - GENERAL. RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 0 Specification Sections, apply to this Section.. SUMMARY A. This Section includes factory assembled and tested, open circuit mechanical induced-draft vertical discharge cooling tower..3 SUBMITTALS A. Product Data: For each type of product indicated. Include rated capacities, pressure drop, performance curves with selected points indicated, furnished specialties, and accessories. B. Shop Drawings: Complete set of manufacturer's prints of evaporative equipment assemblies, control panels, sections and elevations, and unit isolation. Include the following:. Assembled unit dimensions.. Weight and load distribution. 3. Required clearances for maintenance and operation. 4. Sizes and locations of piping and wiring connections. 5. Wiring Diagrams: For power, signal, and control wiring. Differentiate between manufacturer installed and field installed wiring. C. Operation and Maintenance Data: Each unit to include, operation, and maintenance manual..4 QUALITY ASSURANCE A. Verification of Performance:. Manufacturer shall have a thermal performance testing program for water cooling towers certified by the Cooling Technology Institute (CTI) in accordance with CTI Specification Standard STD-0. Manufacturer s performance guarantees or performance bonds shall also be accepted.. Unit Sound Performance ratings shall be tested and certified according to CTI ATC-8 standard. Sound ratings shall not exceed specified ratings. B. Unit shall meet or exceed energy efficiency per ASHRAE WARRANTY A. Submit a written warranty executed by the manufacturer, agreeing to repair or replace components of the unit that fail in materials and workmanship within the specified warranty period. PART - PRODUCTS. Fan Motor/Drive System: Warranty Period shall be Five (5) years from date of unit shipment from Factory (fan motor(s), fan(s), bearings, mechanical support, sheaves, bushings and belt(s)). The entire unit shall have a comprehensive five (5) year warranty against defects in materials and workmanship from date of shipment.. MANUFACTURERS

8 A. Manufacturers: Subject to compliance with requirements, provide cooling towers manufactured by one of the following:. EVAPCO Model USS-9-8. THERMAL PERFORMANCE A. Each unit shall be capable to cool GPM of water entering at 95.00ºF leaving at 85.00ºF at a design wet bulb of 79.00ºF..3 IBC COMPLIANCE A. The unit structure shall be designed, analyzed, and constructed in accordance with the latest edition of International Building Code (IBC) Regulations for seismic loads up to.0 g or wind loads up to 60 psf.4 COMPONENTS A. Description: Factory assembled and tested, induced draft counter flow cooling tower complete with fan, fill, louvers, accessories and rigging supports B. Materials of Construction C. Fan(s):. All cold water basin components including vertical supports, air inlet louver frames and panels up to rigging seam shall be constructed of Type 304 Stainless Steel.. Upper Casing, channels and angle supports shall be constructed of Type 304 Stainless Steel. Fan cowl and guard shall be constructed of Type 304 Stainless Steel."Series 300" Stainless Steel will not be acceptable as equivalent to Type 304 Stainless Steel.. Shall be high efficiency axial propeller type with aluminum wide chord blade construction. Each fan shall be statically balanced and installed in a closely fitted cowl with venturi air inlet for maximum fan efficiency. D. Drift Eliminators. The eliminators shall be constructed entirely of Polyvinyl Chloride (PVC) in easily handled sections. Design shall incorporate three changes in air direction and limit the water carryover to a maximum of 0.00% of the recirculating water rate. E. Water Distribution System. Spray nozzles shall be precision molded ABS, large orifice spray nozzles utilizing fluidic technology for superior water distribution over the fill media and to minimize water distribution system maintenance. Spray header and branches shall be Schedule 40 Polyvinyl Chloride (PVC) for corrosion resistance with steel connection to attach external piping. Branches shall have threaded end caps to facilitate debris removal. F. Heat Transfer Media. Fill media shall be constructed of Polyvinyl Chloride (PVC) of cross-fluted design and suitable for inlet water temperatures up to 30 F. The bonded block fill shall be bottom supported and suitable as an internal working platform. Fill shall be self-extinguishing, have a flame spread of 5 under A.S.T.M. designation E-84-8a, and shall be resistant to rot, decay and biological attack. G. Air Inlet Louvers. The air inlet louvers shall be constructed from UV inhibited polyvinyl chloride (PVC) and incorporate a framed interlocking design that allows for easy removal of louvers for access to the entire basin area for maintenance. The louvers shall have a minimum of two changes in air direction and shall be of a non-planar design to prevent splash-out, block direct sunlight and debris from entering the basin. H. Electronic Water Level Control

9 . Electronic water level control package shall have three (3) stainless steel water level sensors (one () high level, one () low level and one () ground) with a NEMA 4X enclosure mounted in a cleanable Schedule 40 PVC external standpipe with slow closing solenoid valve(s) and "y" strainer(s). Wiring is not included and components must be field mounted. Valves shall be sized for 5 psig (7 kpa) minimum to 5 psig (86 kpa) maximum pressure. Standpipe may require heat tracing by others in cold weather applications. I. Pan Strainer. Pan Strainer shall be all type 304 stainless steel construction with large area removable perforated screens..5 MOTORS AND DRIVES A. General requirements for motors are specified in Division 3 Section Motors B. Fan Motor. Fan motor(s) shall be totally enclosed, ball bearing type electric motor(s) suitable for moist air service. Motor(s) are Premium Efficient, Class F insulated,.5 service factor design. Inverter rated per NEMA MG Part and suitable for variable torque applications and constant torque speed range with properly sized and adjusted variable frequency drives. C. Fan Drive. The fan drive shall be multigroove, solid back V-belt type with taper lock bushings designed for 50% of the motor nameplate horsepower. The belt material shall be neoprene reinforced with polyester cord and specifically designed for evaporative equipment service. Fan sheave shall be aluminum alloy construction. Belt adjustment shall be accomplished from the exterior of the unit. D. Fan Shaft. Shaft shall be Solid, ground and polished steel. Exposed surface coated with rust preventative. E. Fan Shaft Bearings. Fan Shaft Bearings shall be heavy-duty, self-aligning ball type bearings with extended lubrication lines to grease fittings located on access door frame. Bearings shall be designed for a minimum L-0 life of 75,000 hours. F. Vibration Switch. Unit shall be provided with Vibration Cutout Switch, operating on 0V feed, to protect the fan and drive assembly from damage in the event of excess vibration. Vibration switch shall be DPDT..6 MAINTENANCE ACCESS A. Fan Section. Access door shall be hinged and located in the upper casing for fan drive and water distribution system access. Swing away motor cover shall be hinged for motor access. B. Basin Section. Framed removable louver panels shall be on all four sides of the unit for pan and sump access. C. Internal Working Platform D. Ladder. Internal working platform shall provide for easy access to the fans, belts, motor, sheaves, bearings, all mechanical equipment and complete water distribution system. The fill shall be an acceptable means of accessing these components

10 . An OSHA approved aluminum sloped ladder shall be provided for access to the motor access door..7 ACCESSORIES A. Basin Heater Package. Cold water basin shall be fitted with copper-element, electric immersion heater(s) with a separate thermostat and low water protection device. Heaters selected to maintain +40 F pan water at 0 F ambient temperature.. Electric immersion heater package shall include a factory-supplied NEMA 4x enclosure containing a magnetic contactor with 0V control circuit, transformer, and main power disconnect. Control package wired by others

11 EVAPCO, INC. UNIT MODEL # SCALE DWG. # REV. DATE SERIAL # COOLING TOWER NOTES:. (M)- FAN MOTOR LOCATION. HEAVIEST SECTION IS UPPER SECTION 3. MPT DENOTES MALE PIPE THREAD FPT DENOTES FEMALE PIPE THREAD BFW DENOTES BEVELED FOR WELDING 4. +UNIT WEIGHT DOES NOT INCLUDE ACCESSORIES (SEE ACCESSORY DRAWINGS) 5. MAKE-UP WATER PRESSURE 0 psi MIN [37 kpa], 50 psi MAX [344 kpa] USS-9-8 N.T.S. T30936-DRC-ST Preliminary FACE PLAN VIEW 8'-5 /" /9/03 ACCESS DOOR 3/8 543 '- 3/4" 365 FACE 5 96 / 45 '-8 3/4" 7 7/ [00] BFW/GVD INLET / /4 49 MPT MAKE-UP 3 / / / [80] FPT OVERFLOW 3 [80] FPT DRAIN 8 [00] BFW/GVD OUTLET SHIPPING WEIGHT 8'-5 /" 578 FACE 560 lbs+ [545] kg+ 3/8 9 OPERATING WEIGHT 9470 lbs+ [496] kg+ HEAVIEST SECTION WEIGHT 7 / / /8 86 NO. OF SHIPPING SECTIONS '- 3/4" 365 FACE 3960 lbs+ [796] kg+

12 USS-9-8 EVAPCO, INC. TITLE UNIT: DWG. # /9/03 STEEL SUPPORT CONFIGURATION 8.5x INDUCED DRAFT TOWERS SLIX09-DD 3/6 5 Preliminary '- 3/4" / C/L OF UNIT LOAD 5/ /8 537 C/L OF MOUNTING HOLES 3/6 UNIT OUTLINE (8)O 3/4" [9mm] MOUNTING HOLES PLAN VIEW 8'-5 /" 578 3/6 MOUNTING HOLE TYPICAL END VIEW UNIT NOTES:. BEAMS SHOULD BE SIZED IN ACCORDANCE WITH ACCEPTED STRUCTURAL PRACTICES. MAXIMUM DEFLECTION OF BEAM UNDER UNIT TO BE /360 OF UNIT LENGTH NOT TO EXCEED /" [3mm].. DEFLECTION MAY BE CALCULATED BY USING 55% OF THE OPERATING WEIGHT AS A UNIFORM LOAD ON EACH BEAM. SEE CERTIFIED PRINT FOR OPERATING WEIGHT. 3. SUPPORT BEAMS AND ANCHOR HARDWARE ARE TO BE FURNISHED BY OTHERS. ANCHOR HARDWARE TO BE ASTM - A35 5/8" [6mm] BOLT OR EQUIVALENT. 4. BEAMS MUST BE LOCATED UNDER THE FULL LENGTH OF THE PAN SECTION. 5. SUPPORTING BEAM SURFACE MUST BE LEVEL. DO NOT LEVEL THE UNIT BY PLACING SHIMS BETWEEN THE UNIT MOUNTING FLANGE AND THE SUPPORTING BEAM ANCHORING ARRANGEMENT SHOWN HAS A MAXIMUM WIND RATING OF 60 PSF [.87 KPa] ON CASED VERTICAL SURFACES. THE FACTORY RECOMMENDED STEEL SUPPORT CONFIGURATION IS SHOWN. CONSULT THE FACTORY FOR ALTERNATE SUPPORT CONFIGURATIONS. UNIT SHOULD BE POSITIONED ON STEEL SUCH THAT THE ANCHORING HARDWARE FULLY PENETRATES THE BEAM'S FLANGE AND CLEARS THE BEAM'S WEB.

13 USS-9-8 EVAPCO, INC. Preliminary /9/03 TITLE UNIT: DWG. # ELECTRIC WATER LEVEL CONTROL LOCATION INDUCED DRAFT TOWER ELT3MWML-DB ELECTRIC MAKE-UP VALVE WITH Y-STRAINER UPSTREAM OF VALVE (SEE CHART FOR SIZES & QTY) LEVEL PROBE STANDPIPE ASSEMBLY SA (SEE CHART FOR QTY) Y END VIEW X CONN. SIDE UNIT SELECTED BOX SIZE VALVE Y-STRAINER STANDPIPE QTY SIZE PART NO. QTY SIZE PART NO. QTY X Y.4Mx P P.4Mx P P.4Mx P P.4Mx8 (C) P P.4Mx36 (3C) P P.4Mx4 (3C) P P 8.5x P P 8.5x P P 8.5x P P 8.5x8 (C) P P 8.5x36,4 (3C) P P x, P P x8, P P x4, P P x36 (C) P P 3Mx P P 3Mx P P 3Mx P P 3Mx36 (C) P P 6x7 3 / 8 / P P [343] [6] 7.5x7 3 / 8 / P P [343] [6] NOTES:. PIPING BY OTHERS.. LEVEL PROBE STANDPIPE ASSEMBLY, MAKE-UP VALVE AND Y-STRAINER TO SHIP LOOSE FOR FIELD MOUNTING BY OTHERS. 3. SEE CERTIFIED PRINT FOR MAKE-UP LOCATION. 4. STANDPIPE TO BE HEAT TRACED AND INSULATED FOR WINTER OPERATION (BY OTHERS). 5. THE ELECTRONIC WATER LEVEL CONTROL ON THIS UNIT WILL MAINTAIN THE PROPER OPERATING WATER LEVEL. HOWEVER, BEFORE INITIAL START-UP THE UNIT MUST BE MANUALLY FILLED TO WITHIN " OF THE OVERFLOW. 6. FOR EASE OF MAITENANCE, A SHUT-OFF VALVE IS RECOMMENDED UPSTREAM OF Y-STRAINER. 7. DIMENSIONS LISTED AS FOLLOWS: ENGLISH IN [METRIC] [mm]

14 EVAPCO, INC. USS-9-8 /9/03 TITLE SLOPED LADDER INSTALLATION PACKAGE UNIT: DWG. # LDT309DA * THE BOTTOM OF THE LADDER IS AT THE BASE OF THE UNIT. IF THE UNIT IS ELEVATED THEN A LADDER EXTENSION SHOULD BE CONSIDERED. (CONSULT FACTORY). LADDER EXTENSIONS OF UP TO 3 FEET CAN BE ADDED WITHOUT ANY ADDITIONAL SUPPORT. FOR A LADDER EXTENSION LONGER THAN 3 FEET ADDITIONAL SUPPORT MUST BE PROVIDED BY OTHERS. Preliminary LADDER SHIPS LOOSE FOR FIELD MOUNTING (BY OTHERS) NOTE:. REFER TO RIGGING PACK FOR LADDER AND PLATFORM MOUNTING INSTRUCTIONS. '- 3/4" [365] 660 8'-5 /" [578] END VIEW 6 A *RIG LADDER BEFORE PIPING UNIT* BOX SIZE A IN. [MM] AT /6 [48] AT 9 5, 6, /6 [69] AT 9 7, 9 5 3/4 [340] SIDE VIEW CUSTOMER INSTALLATION NOTES: a. b. c. d. e. f. REMOVE LADDER BRACKET MOUNTING BOLTS () FROM LADDER MOUNTING CHANNELS () ON PAN AND CASING SECTIONS. LOOSEN, BUT DO NOT REMOVE, LADDER BRACKET AND ASSY. BOLTS (3). TO ASSEMBLE, SLIDE LADDER BRACKET ASSY. (4) OVER LADDER MOUNTING CHANNELS () LOCATED ON PAN AND CASING (DO NOT REMOVE LADDER BRACKET ASSY. (4) FROM LADDER.) ALIGN HOLES AND REINSTALL LADDER BRACKET MOUNTING BOLTS () THROUGH LADDER BRACKET ASSY. (4) AND LADDER MOUNTING CHANNELS (). TIGHTEN ALL BOLTS. TIGHTEN ADJUSTING SCREW (5) IN THE ADJUSTABLE MOUNTING BRACKETS WHEN APPLICABLE. ADJUSTING SCREW (5) (WHEN APPLICABLE) LADDER BRACKET ASSEMBLY BOLTS (3) LADDER MOUNTING CHANNEL () PAN OR CASING PANEL LADDER BRACKET MOUNTING BOLTS () LADDER BRACKET ASSY. (4)

15 EVAPCO, INC. TITLE UNIT: DWG. # HEATER LOCATION 8.5x/4/8/ INDUCED DRAFT TOWER HLT09VO-DA USS-9-8 /9/03 Preliminary HEATER CONTROL PANEL (OPTIONAL, SEE WIRING DIAGRAM) LWCO COVER PLATE (INSIDE UNIT) CONN. SIDE PANEL ()IMMERSION HEATERS (ONE EACH END) BULB WELL P THERMOSTAT P 9 / 4 0 / LWCO PA END VIEW 40 / / 8 NOTES:. A MINIMUM OF CLEARANCE IS REQUIRED BETWEEN THE HEATER OUTLET BOX AND THE NEAREST OBSTRUCTION FOR REMOVAL OF THE HEATER.. ALL NIPPLES ON UNIT ARE NOT SHOWN IN ORDER TO CLARIFY HEATER COMPONENT LOCATIONS. 3. ALL HEATER COMPONENTS BY EVAPCO ARE FACTORY MOUNTED WHEN POSSIBLE. 4. DIMENSIONS LISTED AS FOLLOWS: ENGLISH IN [METRIC] [mm]

16 Preliminary USS-9-8 /9/03

17 EVAPCO, INC. TITLE VIBRATION SWITCH DESCRIPTION: USS-9-8 SINGLE SPEED DWG. # VAU0000-EE /9/03 SUPPLIED VOLTAGE, 3 PHASE INCOMING POWER CIRCUIT BREAKER M OL T WIRING DIAGRAM: F F Preliminary SWITCH CONTACT RATING: 5 AMPS, 5, OR 480 Vac; /8 HP, 5 Vac; /4 HP, 50 Vac; / AMP, 5 Vdc; /4 AMP, 50 Vdc. F F F T T3 FAN MOTOR DPDT SUPPLIED VOLTAGE H H3 H H4 F HAND OFF X X CONTROL VOLTAGE AUTO XDO M OL OPTIONAL THERMOSTAT OFF DOX EVAPCO VIBRATION SWITCH P CONTROL TRANSFORMER (BY OTHERS) X MOTOR NOTES:. DASHED LINES INDICATE WIRING(BY OTHERS) ADJUSTMENT ADJUST THE SWITCH SO THAT DURING FULL SPEED START-UP AND UNDER NORMAL CONDITIONS, THE CONTACTS DO NOT TRIP. FIRST, WITH THE MOTOR OFF, TURN THE ADJUSTMENT SCREW COUNTER-CLOCKWISE (MORE SENSITIVE DIRECTION) UNTIL THE SWITCH TRIPS. NEXT, TURN THE ADJUSTMENT SCREW CLOCKWISE /8 TURN (LESS SENSITIVE DIRECTION). RESET THE SWITCH BY DEPRESSING THE PUSH-BUTTON RESET LOCATED ON TOP OF THE SWITCH. START THE MOTOR ON FULL SPEED. IF THE MOTOR TRIPS THE SWITCH, THEN TURN THE ADJUSTMENT SCREW CLOCKWISE AN ADDITIONAL /8 TURN. RESET THE SWITCH AND START THE MOTOR AGAIN. REPEAT THE ABOVE PROCEDURE UNTIL THE MOTOR CONTINUES TO RUN.

18 EVAPCO, INC. TITLE DESCRIPTION: DWG. # ELECTRIC WATER LEVEL CONTROL WIRING INDUCED DRAFT - 3 PROBE, VALVE CAI0000-A USS-9-8 /9/03 Preliminary 0 VAC/60 Hz INTEGRAL LEVEL PROBE/RELAY IN A NEMA 4 POLYCARBONATE ENCLOSURE P L L NC C NO ELECTRIC MAKE-UP VALVE (NORMALLY CLOSED) 0v POWER REQUIRED TO OPEN NOTES:. DASHED LINES INDICATE WIRING BY OTHERS.. TYPICAL WIRING PER PROBE.

19 Cooling Tower Data Sheet SFA Project : SFA Tower 5 and 8 Equipment Reference: Product Type : AT/UT/USS Cooling Tower Bill Blair Selection Criteria Capacity (Tons): Capacity (MBH): 4, Fluid Type: Water Flow (GPM): Entering Fluid Temp ( F): 95.0 Leaving Fluid Temp ( F): 85.0 Wet Bulb ( F): 79.0 Date: /9/03 Page: IBC Design Criteria Seismic Design Force (g) g Velocity Pressure (psf) up to 60 CTI Certified Cooling Tower Qty Model Capacity Percent Capacity (Tons) USS All Weights, Dimensions and Technical Data are Shown per Unit Overall Length: Overall Width: Overall Height: Fans: # Fan HP: 5.00 (460/3/60) # kw: 4.00 Air Flow (CFM) 7,800 Inlet Pressure Drop (psi):.8 Evaporated Water Rate (gpm): 7.0 Options Selected Fan Motor: Inverter Capable, Premium Efficient EVAPAK Fill IBC Compliant up to g 3-Probe Electronic Water Level Control Package El. Heaters (0F / -8C ambient) () 4 kw Contactor w/transformer and Disconnect for Heater Package Vibration Switch 304 Stainless Steel Cold Water Basin 304 Stainless Steel Upper Ladder '.750'' 8' 5.500'' ' 8.750'' Operating Weight (lbs): 9,470 Shipping Weight (lbs): 5,60 Heaviest Section (lbs): 3,960 evapselect Version: March 03

20 SECTION COOLING TOWERS PART - GENERAL. RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 0 Specification Sections, apply to this Section.. SUMMARY A. This Section includes factory assembled and tested, open circuit mechanical induced-draft vertical discharge cooling tower..3 SUBMITTALS A. Product Data: For each type of product indicated. Include rated capacities, pressure drop, performance curves with selected points indicated, furnished specialties, and accessories. B. Shop Drawings: Complete set of manufacturer's prints of evaporative equipment assemblies, control panels, sections and elevations, and unit isolation. Include the following:. Assembled unit dimensions.. Weight and load distribution. 3. Required clearances for maintenance and operation. 4. Sizes and locations of piping and wiring connections. 5. Wiring Diagrams: For power, signal, and control wiring. Differentiate between manufacturer installed and field installed wiring. C. Operation and Maintenance Data: Each unit to include, operation, and maintenance manual..4 QUALITY ASSURANCE A. Verification of Performance:. Manufacturer shall have a thermal performance testing program for water cooling towers certified by the Cooling Technology Institute (CTI) in accordance with CTI Specification Standard STD-0. Manufacturer s performance guarantees or performance bonds shall also be accepted.. Unit Sound Performance ratings shall be tested and certified according to CTI ATC-8 standard. Sound ratings shall not exceed specified ratings. B. Unit shall meet or exceed energy efficiency per ASHRAE WARRANTY A. Submit a written warranty executed by the manufacturer, agreeing to repair or replace components of the unit that fail in materials and workmanship within the specified warranty period. PART - PRODUCTS. Fan Motor/Drive System: Warranty Period shall be Five (5) years from date of unit shipment from Factory (fan motor(s), fan(s), bearings, mechanical support, sheaves, bushings and belt(s)). The entire unit shall have a comprehensive five (5) year warranty against defects in materials and workmanship from date of shipment.. MANUFACTURERS

21 A. Manufacturers: Subject to compliance with requirements, provide cooling towers manufactured by one of the following:. EVAPCO Model USS-9-8. Approved Substitute. THERMAL PERFORMANCE A. Each unit shall be capable to cool GPM of water entering at 95.00ºF leaving at 85.00ºF at a design wet bulb of 79.00ºF..3 IBC COMPLIANCE A. The unit structure shall be designed, analyzed, and constructed in accordance with the latest edition of International Building Code (IBC) Regulations for seismic loads up to.0 g or wind loads up to 60 psf.4 COMPONENTS A. Description: Factory assembled and tested, induced draft counter flow cooling tower complete with fan, fill, louvers, accessories and rigging supports B. Materials of Construction C. Fan(s):. All cold water basin components including vertical supports, air inlet louver frames and panels up to rigging seam shall be constructed of Type 304 Stainless Steel.. Upper Casing, channels and angle supports shall be constructed of Type 304 Stainless Steel. Fan cowl and guard shall be constructed of Type 304 Stainless Steel."Series 300" Stainless Steel will not be acceptable as equivalent to Type 304 Stainless Steel.. Shall be high efficiency axial propeller type with aluminum wide chord blade construction. Each fan shall be statically balanced and installed in a closely fitted cowl with venturi air inlet for maximum fan efficiency. D. Drift Eliminators. The eliminators shall be constructed entirely of Polyvinyl Chloride (PVC) in easily handled sections. Design shall incorporate three changes in air direction and limit the water carryover to a maximum of 0.00% of the recirculating water rate. E. Water Distribution System. Spray nozzles shall be precision molded ABS, large orifice spray nozzles utilizing fluidic technology for superior water distribution over the fill media and to minimize water distribution system maintenance. Spray header and branches shall be Schedule 40 Polyvinyl Chloride (PVC) for corrosion resistance with steel connection to attach external piping. Branches shall have threaded end caps to facilitate debris removal. F. Heat Transfer Media. Fill media shall be constructed of Polyvinyl Chloride (PVC) of cross-fluted design and suitable for inlet water temperatures up to 30 F. The bonded block fill shall be bottom supported and suitable as an internal working platform. Fill shall be self-extinguishing, have a flame spread of 5 under A.S.T.M. designation E-84-8a, and shall be resistant to rot, decay and biological attack. G. Air Inlet Louvers. The air inlet louvers shall be constructed from UV inhibited polyvinyl chloride (PVC) and incorporate a framed interlocking design that allows for easy removal of louvers for access to the entire basin area for maintenance. The louvers shall have a minimum of two changes in air direction and shall be of a non-planar design to prevent splash-out, block direct sunlight and debris from entering the basin. H. Electronic Water Level Control

22 . Electronic water level control package shall have three (3) stainless steel water level sensors (one () high level, one () low level and one () ground) with a NEMA 4X enclosure mounted in a cleanable Schedule 40 PVC external standpipe with slow closing solenoid valve(s) and "y" strainer(s). Wiring is not included and components must be field mounted. Valves shall be sized for 5 psig (7 kpa) minimum to 5 psig (86 kpa) maximum pressure. Standpipe may require heat tracing by others in cold weather applications. I. Pan Strainer. Pan Strainer shall be all type 304 stainless steel construction with large area removable perforated screens..5 MOTORS AND DRIVES A. General requirements for motors are specified in Division 3 Section Motors B. Fan Motor. Fan motor(s) shall be totally enclosed, ball bearing type electric motor(s) suitable for moist air service. Motor(s) are Premium Efficient, Class F insulated,.5 service factor design. Inverter rated per NEMA MG Part and suitable for variable torque applications and constant torque speed range with properly sized and adjusted variable frequency drives. C. Fan Drive. The fan drive shall be multigroove, solid back V-belt type with taper lock bushings designed for 50% of the motor nameplate horsepower. The belt material shall be neoprene reinforced with polyester cord and specifically designed for evaporative equipment service. Fan sheave shall be aluminum alloy construction. Belt adjustment shall be accomplished from the exterior of the unit. D. Fan Shaft. Shaft shall be Solid, ground and polished steel. Exposed surface coated with rust preventative. E. Fan Shaft Bearings. Fan Shaft Bearings shall be heavy-duty, self-aligning ball type bearings with extended lubrication lines to grease fittings located on access door frame. Bearings shall be designed for a minimum L-0 life of 75,000 hours. F. Vibration Switch. Unit shall be provided with Vibration Cutout Switch, operating on 0V feed, to protect the fan and drive assembly from damage in the event of excess vibration. Vibration switch shall be DPDT..6 MAINTENANCE ACCESS A. Fan Section. Access door shall be hinged and located in the upper casing for fan drive and water distribution system access. Swing away motor cover shall be hinged for motor access. B. Basin Section. Framed removable louver panels shall be on all four sides of the unit for pan and sump access. C. Internal Working Platform D. Ladder. Internal working platform shall provide for easy access to the fans, belts, motor, sheaves, bearings, all mechanical equipment and complete water distribution system. The fill shall be an acceptable means of accessing these components

23 . An OSHA approved aluminum sloped ladder shall be provided for access to the motor access door..7 ACCESSORIES A. Basin Heater Package. Cold water basin shall be fitted with copper-element, electric immersion heater(s) with a separate thermostat and low water protection device. Heaters selected to maintain +40 F pan water at 0 F ambient temperature.. Electric immersion heater package shall include a factory-supplied NEMA 4x enclosure containing a magnetic contactor with 0V control circuit, transformer, and main power disconnect. Control package wired by others

24 EVAPCO, INC. UNIT MODEL # SCALE DWG. # REV. DATE SERIAL # COOLING TOWER NOTES:. (M)- FAN MOTOR LOCATION. HEAVIEST SECTION IS UPPER SECTION 3. MPT DENOTES MALE PIPE THREAD FPT DENOTES FEMALE PIPE THREAD BFW DENOTES BEVELED FOR WELDING 4. +UNIT WEIGHT DOES NOT INCLUDE ACCESSORIES (SEE ACCESSORY DRAWINGS) 5. MAKE-UP WATER PRESSURE 0 psi MIN [37 kpa], 50 psi MAX [344 kpa] USS-9-8 N.T.S. T30936-DRC-ST Preliminary FACE PLAN VIEW 8'-5 /" /9/03 ACCESS DOOR 3/8 543 '- 3/4" 365 FACE 5 96 / 45 '-8 3/4" 7 7/ [00] BFW/GVD INLET / /4 49 MPT MAKE-UP 3 / / / [80] FPT OVERFLOW 3 [80] FPT DRAIN 8 [00] BFW/GVD OUTLET SHIPPING WEIGHT 8'-5 /" 578 FACE 560 lbs+ [545] kg+ 3/8 9 OPERATING WEIGHT 9470 lbs+ [496] kg+ HEAVIEST SECTION WEIGHT 7 / / /8 86 NO. OF SHIPPING SECTIONS '- 3/4" 365 FACE 3960 lbs+ [796] kg+

25 USS-9-8 EVAPCO, INC. TITLE UNIT: DWG. # /9/03 STEEL SUPPORT CONFIGURATION 8.5x INDUCED DRAFT TOWERS SLIX09-DD 3/6 5 Preliminary '- 3/4" / C/L OF UNIT LOAD 5/ /8 537 C/L OF MOUNTING HOLES 3/6 UNIT OUTLINE (8)O 3/4" [9mm] MOUNTING HOLES PLAN VIEW 8'-5 /" 578 3/6 MOUNTING HOLE TYPICAL END VIEW UNIT NOTES:. BEAMS SHOULD BE SIZED IN ACCORDANCE WITH ACCEPTED STRUCTURAL PRACTICES. MAXIMUM DEFLECTION OF BEAM UNDER UNIT TO BE /360 OF UNIT LENGTH NOT TO EXCEED /" [3mm].. DEFLECTION MAY BE CALCULATED BY USING 55% OF THE OPERATING WEIGHT AS A UNIFORM LOAD ON EACH BEAM. SEE CERTIFIED PRINT FOR OPERATING WEIGHT. 3. SUPPORT BEAMS AND ANCHOR HARDWARE ARE TO BE FURNISHED BY OTHERS. ANCHOR HARDWARE TO BE ASTM - A35 5/8" [6mm] BOLT OR EQUIVALENT. 4. BEAMS MUST BE LOCATED UNDER THE FULL LENGTH OF THE PAN SECTION. 5. SUPPORTING BEAM SURFACE MUST BE LEVEL. DO NOT LEVEL THE UNIT BY PLACING SHIMS BETWEEN THE UNIT MOUNTING FLANGE AND THE SUPPORTING BEAM ANCHORING ARRANGEMENT SHOWN HAS A MAXIMUM WIND RATING OF 60 PSF [.87 KPa] ON CASED VERTICAL SURFACES. THE FACTORY RECOMMENDED STEEL SUPPORT CONFIGURATION IS SHOWN. CONSULT THE FACTORY FOR ALTERNATE SUPPORT CONFIGURATIONS. UNIT SHOULD BE POSITIONED ON STEEL SUCH THAT THE ANCHORING HARDWARE FULLY PENETRATES THE BEAM'S FLANGE AND CLEARS THE BEAM'S WEB.

26 USS-9-8 EVAPCO, INC. Preliminary /9/03 TITLE UNIT: DWG. # ELECTRIC WATER LEVEL CONTROL LOCATION INDUCED DRAFT TOWER ELT3MWML-DB ELECTRIC MAKE-UP VALVE WITH Y-STRAINER UPSTREAM OF VALVE (SEE CHART FOR SIZES & QTY) LEVEL PROBE STANDPIPE ASSEMBLY SA (SEE CHART FOR QTY) Y END VIEW X CONN. SIDE UNIT SELECTED BOX SIZE VALVE Y-STRAINER STANDPIPE QTY SIZE PART NO. QTY SIZE PART NO. QTY X Y.4Mx P P.4Mx P P.4Mx P P.4Mx8 (C) P P.4Mx36 (3C) P P.4Mx4 (3C) P P 8.5x P P 8.5x P P 8.5x P P 8.5x8 (C) P P 8.5x36,4 (3C) P P x, P P x8, P P x4, P P x36 (C) P P 3Mx P P 3Mx P P 3Mx P P 3Mx36 (C) P P 6x7 3 / 8 / P P [343] [6] 7.5x7 3 / 8 / P P [343] [6] NOTES:. PIPING BY OTHERS.. LEVEL PROBE STANDPIPE ASSEMBLY, MAKE-UP VALVE AND Y-STRAINER TO SHIP LOOSE FOR FIELD MOUNTING BY OTHERS. 3. SEE CERTIFIED PRINT FOR MAKE-UP LOCATION. 4. STANDPIPE TO BE HEAT TRACED AND INSULATED FOR WINTER OPERATION (BY OTHERS). 5. THE ELECTRONIC WATER LEVEL CONTROL ON THIS UNIT WILL MAINTAIN THE PROPER OPERATING WATER LEVEL. HOWEVER, BEFORE INITIAL START-UP THE UNIT MUST BE MANUALLY FILLED TO WITHIN " OF THE OVERFLOW. 6. FOR EASE OF MAITENANCE, A SHUT-OFF VALVE IS RECOMMENDED UPSTREAM OF Y-STRAINER. 7. DIMENSIONS LISTED AS FOLLOWS: ENGLISH IN [METRIC] [mm]

27 EVAPCO, INC. USS-9-8 /9/03 TITLE SLOPED LADDER INSTALLATION PACKAGE UNIT: DWG. # LDT309DA * THE BOTTOM OF THE LADDER IS AT THE BASE OF THE UNIT. IF THE UNIT IS ELEVATED THEN A LADDER EXTENSION SHOULD BE CONSIDERED. (CONSULT FACTORY). LADDER EXTENSIONS OF UP TO 3 FEET CAN BE ADDED WITHOUT ANY ADDITIONAL SUPPORT. FOR A LADDER EXTENSION LONGER THAN 3 FEET ADDITIONAL SUPPORT MUST BE PROVIDED BY OTHERS. Preliminary LADDER SHIPS LOOSE FOR FIELD MOUNTING (BY OTHERS) NOTE:. REFER TO RIGGING PACK FOR LADDER AND PLATFORM MOUNTING INSTRUCTIONS. '- 3/4" [365] 660 8'-5 /" [578] END VIEW 6 A *RIG LADDER BEFORE PIPING UNIT* BOX SIZE A IN. [MM] AT /6 [48] AT 9 5, 6, /6 [69] AT 9 7, 9 5 3/4 [340] SIDE VIEW CUSTOMER INSTALLATION NOTES: a. b. c. d. e. f. REMOVE LADDER BRACKET MOUNTING BOLTS () FROM LADDER MOUNTING CHANNELS () ON PAN AND CASING SECTIONS. LOOSEN, BUT DO NOT REMOVE, LADDER BRACKET AND ASSY. BOLTS (3). TO ASSEMBLE, SLIDE LADDER BRACKET ASSY. (4) OVER LADDER MOUNTING CHANNELS () LOCATED ON PAN AND CASING (DO NOT REMOVE LADDER BRACKET ASSY. (4) FROM LADDER.) ALIGN HOLES AND REINSTALL LADDER BRACKET MOUNTING BOLTS () THROUGH LADDER BRACKET ASSY. (4) AND LADDER MOUNTING CHANNELS (). TIGHTEN ALL BOLTS. TIGHTEN ADJUSTING SCREW (5) IN THE ADJUSTABLE MOUNTING BRACKETS WHEN APPLICABLE. ADJUSTING SCREW (5) (WHEN APPLICABLE) LADDER BRACKET ASSEMBLY BOLTS (3) LADDER MOUNTING CHANNEL () PAN OR CASING PANEL LADDER BRACKET MOUNTING BOLTS () LADDER BRACKET ASSY. (4)

28 EVAPCO, INC. TITLE UNIT: DWG. # HEATER LOCATION 8.5x/4/8/ INDUCED DRAFT TOWER HLT09VO-DA USS-9-8 /9/03 Preliminary HEATER CONTROL PANEL (OPTIONAL, SEE WIRING DIAGRAM) LWCO COVER PLATE (INSIDE UNIT) CONN. SIDE PANEL ()IMMERSION HEATERS (ONE EACH END) BULB WELL P THERMOSTAT P 9 / 4 0 / LWCO PA END VIEW 40 / / 8 NOTES:. A MINIMUM OF CLEARANCE IS REQUIRED BETWEEN THE HEATER OUTLET BOX AND THE NEAREST OBSTRUCTION FOR REMOVAL OF THE HEATER.. ALL NIPPLES ON UNIT ARE NOT SHOWN IN ORDER TO CLARIFY HEATER COMPONENT LOCATIONS. 3. ALL HEATER COMPONENTS BY EVAPCO ARE FACTORY MOUNTED WHEN POSSIBLE. 4. DIMENSIONS LISTED AS FOLLOWS: ENGLISH IN [METRIC] [mm]

29 Preliminary USS-9-8 /9/03

30 EVAPCO, INC. TITLE VIBRATION SWITCH DESCRIPTION: USS-9-8 SINGLE SPEED DWG. # VAU0000-EE /9/03 SUPPLIED VOLTAGE, 3 PHASE INCOMING POWER CIRCUIT BREAKER M OL T WIRING DIAGRAM: F F Preliminary SWITCH CONTACT RATING: 5 AMPS, 5, OR 480 Vac; /8 HP, 5 Vac; /4 HP, 50 Vac; / AMP, 5 Vdc; /4 AMP, 50 Vdc. F F F T T3 FAN MOTOR DPDT SUPPLIED VOLTAGE H H3 H H4 F HAND OFF X X CONTROL VOLTAGE AUTO XDO M OL OPTIONAL THERMOSTAT OFF DOX EVAPCO VIBRATION SWITCH P CONTROL TRANSFORMER (BY OTHERS) X MOTOR NOTES:. DASHED LINES INDICATE WIRING(BY OTHERS) ADJUSTMENT ADJUST THE SWITCH SO THAT DURING FULL SPEED START-UP AND UNDER NORMAL CONDITIONS, THE CONTACTS DO NOT TRIP. FIRST, WITH THE MOTOR OFF, TURN THE ADJUSTMENT SCREW COUNTER-CLOCKWISE (MORE SENSITIVE DIRECTION) UNTIL THE SWITCH TRIPS. NEXT, TURN THE ADJUSTMENT SCREW CLOCKWISE /8 TURN (LESS SENSITIVE DIRECTION). RESET THE SWITCH BY DEPRESSING THE PUSH-BUTTON RESET LOCATED ON TOP OF THE SWITCH. START THE MOTOR ON FULL SPEED. IF THE MOTOR TRIPS THE SWITCH, THEN TURN THE ADJUSTMENT SCREW CLOCKWISE AN ADDITIONAL /8 TURN. RESET THE SWITCH AND START THE MOTOR AGAIN. REPEAT THE ABOVE PROCEDURE UNTIL THE MOTOR CONTINUES TO RUN.

31 EVAPCO, INC. TITLE DESCRIPTION: DWG. # ELECTRIC WATER LEVEL CONTROL WIRING INDUCED DRAFT - 3 PROBE, VALVE CAI0000-A USS-9-8 /9/03 Preliminary 0 VAC/60 Hz INTEGRAL LEVEL PROBE/RELAY IN A NEMA 4 POLYCARBONATE ENCLOSURE P L L NC C NO ELECTRIC MAKE-UP VALVE (NORMALLY CLOSED) 0v POWER REQUIRED TO OPEN NOTES:. DASHED LINES INDICATE WIRING BY OTHERS.. TYPICAL WIRING PER PROBE.