ADDENDUM NO. 02 February 12, 2018

Transcription

1 ADDENDUM NO. 02 February 12, 2018 To Drawings and Specifications dated January 16, James Monroe Elementary School Roof and HVAC Replacement 2567 Marlow Road, Santa Rosa CA Prepared by: PBK Project Nos.: PBK 2520 Venture Oaks Way, Suite 440 Sacramento, California R A. Receipt of this Addendum shall be acknowledged on the Bid Form. B. This Addendum forms part of the Contract documents for the above referenced project and shall be incorporated integrally therewith. C. Each bidder shall make necessary adjustments and submit this proposal with full knowledge of all modifications, clarifications, and supplemental data included therein. Where provisions of the following supplemental data differ from those of the original Contract Documents, this Addendum shall govern. D. Clarification: Are crickets required at drainage planes at curbs and protrusions? YES E. Clarification: The finished slope on crickets shall be minimum ¼:12 to match roof slope. F. Clarification: Lumber used for shims, blocking, and nailers is specified in SECTION MISCELLANEOUS ROUGH CARPENTRY. G. Clarification: Are Rooftop Air Vents to be raised and re-used? Will all the existing roof NON-powered roof ventilators be removed and re-installed, with new curbs? ANY PROTRUSION MUST ACCOMMODATE THE MANUFACTURER S DETAILS AND WARRANTY REQUIREMENTS. All Existing roof top equipment not identified as abandoned to be removed will need the existing curbs raised to minimum 8 above new roof elevation as required by roof manufactures warranty. H. Clarification: The color of prefinished sheet metal shall be determined by District from standard color palette by manufacturer. No custom colors shall be considered. I. Clarification: Will there will be children at Summer School? IT IS POSSIBLE. While there is no summer school planned for this school, it is possible that the District may have to provide this venue for a summer program. If that becomes the case, please coordinate with onsite management and the District for your staging, lay down, storage, and Work operations. Planning and coordination with the District is imperative. J. Clarification: Conduit, condensate drain lines, piping, and connections will need to accommodate the new roof heights. K. Clarification: Will all pipe clamps need to be stainless steel? YES L. Clarification: Will all the existing skylights be raised up and re used or replaced? RAISED AND REPLACED. HEIGHTS MUST ACCOMMODATE ROOFING SYSTEM REQUIREMENTS FOR 20 YEAR WARRANTY.. All existing skylights in roof replacement areas only will need the existing curbs raised to minimum 8 above new roof elevation as required by roof manufactures warranty and the skylights re-installed to a watertight installation. M. Clarification: Condensate drain lines shall be routed to nearest condensate roof drain on new engineered pipe supports 2520 Venture Oaks Way, Suite 440 \\ Sacramento, California \\ P \\ F \\ PBK.com

2 N. Clarification: Replace the roof hatches? NO SEE ADDENDUM #1 Sheet GO: 1 General Notes; ADD: T. All Roof Hatches; Repair and/or Replace Damaged Latch/Handles, Hinges and Lift Assistance Tubes. O. Clarification: Buildings C1, D1, and F1 are included in the Work. P. Clarification: At rise wall between Area A1 and A2, remove existing windows, install new wood framing to raise window sill 24 from existing elevation, vertical studs to be 12 O.C. fastened to existing horizontal sill with two 10d Common Hot-Dipped Galvanized fasteners per studs. Fasten the new horizontal sill to top of vertical studs with two 10d Common Hot-Dipped Galvanized fasteners to each stud. Install batt insulation between new studs, install 5/8 sheetrock to interior wall and prep, texture and paint new sheetrock to match adjacent walls. On exterior wall install new ½ 5-Ply Plywood sheeting to match texture of adjacent walls and prep and paint to match adjacent construction. Install new windows to match existing window construction. Q. Clarification: Please clarify the new window sizes on building A4 lower wall? THE WINDOW SIZE WILL DEPEND ON THE CONTRACTOR S MEANS AND METHODS FOR THE DEMOLITION OF THE SILL, WALLS, AND FRAMING. R. Clarification: The JCI programmable thermostats will not be required to be connected to overall site building management systems as part of this project. They shall operate stand-alone. Existing conduit can be used from unit to t-stat location. Contractor is required to contract with existing building controls contractor to remove any programming of equipment being replaced that will no longer be controlled thru building management system. S. Clarification: Gas piping at all units will need to have dirt legs, shut off valves and stainless steel flex connections at all units being replaced. T. Clarification: All roof ventilators will be re-used once the new prefabricated curbs are installed. U. Clarification: A post air balance will be required once all ductwork and equipment are installed to confirm required air flow is being discharged per equipment nameplates and design. V. Clarification: The installing mechanical contractor is responsible to re-install existing duct smoke detectors on any new ductwork or equipment that is being replaced. All devices shall be placed in working condition and reporting to main campus fire alarm panel at completion of project. W. Clarification: There is not a controls allowance that will be added to this project since the scope has already been identified to install the wireless programmable thermostat and connect to new unit. X. Clarification: All new condensing units shall receive new curbs. Y. Clarification: All existing electrical conduits for power and data/fiber systems as well as existing gas piping shall be raised as required to accommodate new roof system elevation. All final installation of conduit, junction boxes and piping shall allow for systems to be maintained and accessible. Z. Clarification: All units being replaced shall receive new condensate piping from unit to nearest roof drain. All piping shall be properly supported in its entirety. VOLUME 1 BIDDING AND CONTRACT REQUIREMENTS: Item No. 01 Section F NOTICE Instructions to Bidders: Revise Paragraph F NOTICE in Section Instructions to Bidders to read: NOTICE: BIDDERS SHALL BE REQUIRED TO COMPLETE THE STATEMENT OF EXPERIENCE FORM AND REQUIRE COMPLETION OF THE STATEMENT OF EXERIENCE FORM INCLUDED IN THE BID PACKAGE. BIDDERS STATEMENT OF EXPERIENCE FORMS SHALL BE SUBMITTED CONCURRENTLY WITH SUBMISSION OF BIDS IN ACCORDANCE WITH THE NOTICE INVITING BIDS. A BIDDER WHO IS NOTIFIED THAT HE/SHE/IT IS THE APPARENT LOW-BIDDER MAY BE REQUIRED, WITHIN FORTY-EIGHT (48) HOURS OF BEING NOTIFIED BY 2520 Venture Oaks Way, Suite 440 \\ Sacramento, California \\ P \\ F \\ PBK.com

3 THE DISTRICT THAT HE/SHE/IT IS THE APPARENT LOW BIDDER, SUBMIT THE STATEMENT OF EXPERIENCE FORM(S) FOR ALL LISTED SUBCONTRACTORS. FAILURE TO TIMELY SUBMIT SUBCONTRACTOR STATEMENT OF EXPERIENCE FORMS MAY RESULT IN THE REJECTION OF THE BID. Item No. 04 Section BOND AND INSURANCE INFORMATION: Item D For the General Liability limit requirement of $2M each occ/$3m agg, will PBK accept if these limits are met by a combination of the General Liability & Excess Liability limits? YES Item I. Is the GC & all subs required to obtain Crane Liability Insurance or is it acceptable if just the crane subcontractor (& operator) carries the insurance? CRANE SUBCONTRACTOR SHALL CARRY CRAIN LIBAILITY INSURANCE Item K. Confirm that only the Prime Contractor is required to carry the Builders Risk Coverage, provided that the Subcontractors are listed as Named Insureds on the policy. PRIME CONTRACTOR IS REQUIRED TO CARRY BUILDERS RISK COVERAGE. Section Substitution Request Form Is it necessary for Bid Submission? It states, if applicable. What s our position on this? ONLY IF BIDDING A SUBSTITUTION VOLUME 2 - SPECIFICATIONS Item No. 01 Section A ROOFING INSULATION: Roofing system includes 3.5-inches polyisocyanurate insulation mechanically fastened to deck + Tapered crickets with a finished slope of ¼:12 minimum + ¼-inch Dens Deck Prime. The Intent of the Design is to provide a finished roof system that establishes and maintains positive drainage at all roof locations. MECHANICAL Item No. 01 Item No. 02 Section Air Cooled Refrigerant Condensers 1. Add spec section in its entirety. Section Packaged, Outdoor, Central-Station Air Handling Units 1. Delete section 1.8.B. 2. Section 2.2.C. Revise exterior gauge to 20 and 650 hours of salt spray testing. 3. Section 2.2.E.2 Revise thickness to ½ Venture Oaks Way, Suite 440 \\ Sacramento, California \\ P \\ F \\ PBK.com

4 4. Section 2.5.F.1 Revise to read Refer to schedule for dual and multi-stage compressor requirement. 5. Section 2.7.B.1 Heat exchanger material shall be aluminum in lieu of stainless steel. Thermal efficiency shall remain same. 6. Section 2.7.E.1 Revise to 2-stage gas control valve. Item No. 03 Section Fan Coil Units 1. Add spec section in its entirety. DRAWINGS Item No. 1 Sheet GO Detail 13, Existing Roof Areas: Area W1 Building F and Area W4 Building F have Proposed Nomenclature A, as shown in Detail 8, New Nomenclature. MECHANICAL Item No. 01 Item No. 02 Sheet M1.0 Mechanical Roof Plan Monroe Elementary 1. Area B rooftop units, AC-B-01 to AC-B-07, all rooftop unit shall have down discharge. Contractor to provide new roof curb and locate new rooftop unit over existing supply and return roof opening. 2. Area W rooftop units, AC-W-01, AC-W-05 & AC-W-06, all rooftop unit shall have down discharge. Contractor to provide new roof curb and locate new rooftop unit over existing supply and return roof opening. 3. Replace existing condensing unit on roof A5 and associated indoor fan coil unit with new. Tag condensing unit CU-1 and indoor fan coil unit F-1. Reference keyed note 6 to condensing unit. 4. Add keyed note 6 to read Replace existing condensing unit and associated fan coil unit within the building, refrigerant lines, and condensate line with new. Connect new fan coil unit with existing ductwork. Replace existing hooded curb for refrigerant lines with new; refer to roof drawings for additional details. Condensing unit and fan coil unit shall comply with 2016 California Title 24 and rated for seismic application. Maintain code required and manufacturer required airflow and maintenance clearance around the unit. Contractor to orient the unit to match existing condition; new supply and return duct connection and routing shall match existing. Coordinate with structural engineer and confirm if the new unit can be installed on existing structure. Remove existing temperature sensor, wiring and conduit in space and provide new. Remove existing condensate drain pipe and supports and provide new. Route to existing nearest drain location. Sheet M2.0 Mechanical Schedules Monroe Elementary 1. Packaged, Outdoor, Central-Station Outside Air-Handling Unit Schedule a. Add to note 14 Part number TEC b. Add to note 17 Provide 100% barometric relief dampers. c. Add Fan Coil Unit and Air-Cooled Condensing Unit Schedules. Refer to sketch SKM-01. ELECTRICAL Item No. 01 Item No. 02 Sheet E1.0 Electrical Roof Plan Monroe ES 1. Refer to electrical sketch SKE-01 for information related to condensing unit. 2. Refer to electrical sketch SKE-02 for equipment schedule information. General item. Power receptacle on rooftop equipment can be powered locally thru unit. Additional circuit for equipment receptacle is not required. End of Addendum No Venture Oaks Way, Suite 440 \\ Sacramento, California \\ P \\ F \\ PBK.com

5 SECTION AIR-COOLED REFRIGERANT CONDENSERS CONDITIONS OF THE CONTRACT AND DIVISION 1, as applicable, apply to this Section. PART 1 GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section includes refrigerant condenser package, charge of refrigerant and oil, controls and control connections, refrigerant piping and connections, motor starters, electrical power connections. B. Related Sections: 1. Section Vibration and Seismic Controls for HVAC Piping and Equipment: Product requirements for vibration isolation for placement by this section. 2. Section Refrigerant Piping: Execution requirements for connection to refrigerant piping specified by this section. 1.3 PERFORMANCE REQUIREMENTS A. Performance Ratings: Energy Efficiency Rating (EER) and Coefficient of Performance (COP) not less than prescribed by ASHRAE 90.1 when used in combination with compressors and evaporator coils. 1.4 ACTION SUBMITTALS A. Provide line-by-line specification review annotated to certify compliance or deviation. B. Product Data: For each air-cooled refrigerant condenser. Include rated capacities, operating characteristics, furnished specialties, and accessories. Include equipment dimensions, weights and structural loads, required clearances, method of field assembly, components, and location and size of each field connection. 1. Shop Drawings: For air-cooled refrigerant condensers. Include plans, elevations, sections, details, and attachments to other work. 1.5 INFORMATIONAL SUBMITTALS A. Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection. B. Wiring Diagrams: For power, signal, and control wiring. A. Coordination Drawings: Plans, drawn to scale, on which the following items are shown and coordinated with each other, based on input from installers of the items involved: AIR-COOLED REFRIGERANT CONDENSERS

6 1. Structural members to which air-cooled refrigerant condensers will be attached. 2. Liquid and vapor pipe sizes. 3. Refrigerant specialties. 4. Piping including connections, oil traps, and double risers. 5. Evaporators. B. Field quality-control reports. 1.6 CLOSEOUT SUBMITTALS A. Operation and Maintenance Data: For air-cooled refrigerant condensers to include in emergency, operation, and maintenance manuals. 1.7 QUALITY ASSURANCE A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. B. Fabricate and label refrigeration system according to ASHRAE 15, "Safety Standard for Refrigeration Systems." C. ASHRAE/IESNA 90.1 Compliance: Applicable requirements in ASHRAE/IESNA 90.1, Section 6 - "Heating, Ventilating, and Air-Conditioning." 1.8 COORDINATION A. Coordinate size and location of concrete bases. Cast anchor-bolt inserts into bases. B. Coordinate installation of roof curbs, equipment supports, and roof penetrations. C. Coordinate location of refrigerant piping and electrical rough-ins. 1.9 QUALIFICATIONS A. Installer: Company specializing in performing Work of this section with minimum three (3) years experience approved by manufacturer DELIVERY, STORAGE, AND HANDLING A. Equipment shall be factory wrapped by the manufacturer prior to shipment to prevent damage due to weather and road debris during transportation and thereafter while in storage awaiting installation. Protection of the complete unit from rusting and water migration must be handled as best suits the circumstances. Store in a place protected from construction traffic and weather. B. All equipment shall remain in manufacturer s protective shipping wrap during construction. Openings must remain protected and covered during construction. If protective wrap has been damaged, the contractor shall provide additional protective wrap as directed by engineer. C. Contractor shall adequately protect equipment from damage after delivery to the project. Equipment shall be completely covered and secured with heavy tarpaulins, drop cloths or other protective coverings as required to protect from inclement weather, moisture, AIR-COOLED REFRIGERANT CONDENSERS

7 chemicals, construction traffic, plaster, paint, mortar and/or dirt. Do not cover with plastic materials and trap condensate and cause corrosion. Protective covering is in addition to the manufacturer s original factory packaging. Original factory packaging shall not be deemed as acceptable protection of equipment. D. Do not deliver equipment to the project site until progress of construction has reached the stage where equipment is actually needed or until building is closed in enough to protect the equipment from weather. Equipment allowed to stand in the weather will be rejected, and the contractor is obligated to furnish new equipment of like kind at no additional cost to the Owner. Limit shipment of bulk and multi-use materials to quantities needed for immediate installation. E. Comply with manufacturer's installation instructions for rigging, unloading, and transporting units. F. Protect units from physical damage. Leave factory covers in place until startup of machine WARRANTY A. The manufacturer shall provide a full machine parts, labor, and refrigerant warranty for a period of one (1) year. Warranty shall begin from date of Certificate of Substantial Completion. Provide manufacturer s warranty certificates as described below. Warranty start date from shipment or start up will not be acceptable. B. In addition to full machine parts, labor and refrigerant, the Standard and Extended warranty shall include miscellaneous materials, travel time, incidental expenses, normal freight/shipping, refrigerant, oils, lubricants, belts, filters, insulation and any expenses related to service calls required to diagnose and correct warranty issues. C. The manufacturer shall provide factory certificates for each condensing unit listing as a minimum the model, serial number and warranty information as specified above. Payment to contractor may be held if warranty certificates are not provided in a timely manner. D. All warranty work shall be performed by factory direct service technician. Warranty work shall not be performed by installing mechanical contractor PREVENTATIVE MAINTENANCE SERVICE A. Furnish service and maintenance of condensers for period of five (5) years from Date of Substantial Completion. B. Include, on a quarterly basis, systematic examination, required adjustments, lubrication of unit and controls calibration. Repair or replace parts in accordance with manufacturer's operating and maintenance data. Use new parts produced by manufacturer of original equipment. C. Perform work without removing units from service during building normal occupied hours. Off-line work must be coordinated with Owner. D. At an additional cost to owner provide emergency call back service at all hours during this maintenance period. AIR-COOLED REFRIGERANT CONDENSERS

8 E. Maintain locally adequate stock of parts for replacement or emergency purposes. Have personnel available to ensure fulfillment of this maintenance service, without unreasonable loss of time. F. All maintenance work shall be performed by factory direct service technician. Maintenance work shall not be performed by installing mechanical contractor G. Do not assign or transfer maintenance service to agent or subcontractor without prior written consent of Owner EXTRA MATERIALS A. Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents. Spare materials shall be provided by equipment manufacturer and not by the installing mechanical contractor. 1. Fan Belts: Furnish two (2) for each belt-driven fan. PART 2 - PRODUCTS 2.1 AIR-COOLED REFRIGERANT CONDENSERS A. Acceptable Manufacturers: Subject to compliance with plans and specification, provide one of the following: 1. Carrier 2. Trane B. Product Description: 2.2 HOUSING 1. Self-contained packaged, factory assembled, pre-wired unit, suitable for outdoor use consisting of casing, condensing coil and fans, compressors, and controls. Each unit shall consist of hermetic scroll compressor air-cooled condenser section. 2. Construction and Ratings: In accordance with ARI 210/240. Testing in accordance with ASHRAE Air-Cooled Refrigerant Condensing units shall be the same manufacturer as associated Air Handling Unit or Fan Coil Unit. Mismatched equipment is not acceptable. A. House components in welded steel frame with galvanized steel panels with weather resistant, baked enamel finish. B. Mount starters, disconnects, and controls in weatherproof panel with full opening access doors. Furnish mechanical interlock to disconnect power when door is opened. C. Furnish removable access doors or panels with quick fasteners. Units over 25 tons shall be provided with piano hinges and quick fasteners. AIR-COOLED REFRIGERANT CONDENSERS

9 D. Furnish welded steel floor mounting stand and duct collars at coil inlet and fan outlet. 2.3 CONDENSER COILS A. Coils under 15 tons: Condenser coils shall have all Aluminum Microchannel coils. All coils shall be leak tested at the factory to ensure pressure integrity. The condenser coil shall be pressure tested to 650 psig. B. Compressors: 1. Scroll type, hermetically sealed. 2. Minimum of 2 compressors for units 7.5-tons or larger. 3. Minimum of 4 compressors for units 15-tons or larger. 4. Refrigerant shall be R-410a. 5. All scroll compressors shall include Internal Pressure Relief as standard. 6. For each compressor provide starter, non recycling compressor overload, starter relay, and control power transformer or terminal for control power. Provide manual reset current overload protection. C. Provide variable speed compressors or hot gas bypass to allow compressors to operate at low load conditions. D. Unit shall be able to operate down to 10 degrees Fahrenheit ambient temperature as standard. E. Coil Guard: louvered with lint screens. F. Configuration: Two refrigeration circuits each with receiver. 2.4 REFRIGERANT CIRCUIT A. Single Compressor: One refrigerant circuit with single compressor. B. Multiple compressors: Each compressor shall have an isolated refrigerant circuit piped such that burn out of one compressor shall not damage the other compressor(s). Compressors shall not be piped in parallel arrangement into one refrigerant circuit. C. Furnish for each refrigerant circuit: 2.5 FANS AND MOTORS 1. Liquid line solenoid valve. 2. Filter dryer (replaceable core type without refrigerant loss or removal). 3. Liquid line sight glass and moisture indicator. 4. Electronic expansion valve. 5. Charging valve. 6. Insulated suction line. 7. Discharge line check valve. 8. Compressor discharge service valve. 9. Condenser Pressure relief valve. 10. Suction and liquid line service valves. A. Vertical discharge direct driven propeller type condenser fans with fan guard on discharge, equipped with roller or ball bearings with grease fittings extended to outside of casing. AIR-COOLED REFRIGERANT CONDENSERS

10 B. Weatherproof motors suitable for outdoor use, single phase permanent split capacitor or 3 phase, with permanent lubricated ball bearings and built-in current and thermal overload protection. 2.6 CONTROLS A. Factory wired and mounted control panel, NEMA 3R, containing fan motor starters, fan cycling thermostats, head pressure controls, compressor interlock and control transformer. B. Furnish controls to permit operation down to 10 degrees Fahrenheit ambient temperature. C. Furnish thermostat to cycle fan motors in response to outdoor temperature. D. Furnish head pressure switch to cycle fan motors in response to refrigerant condensing pressure. E. Furnish solid state control to vary speed of one condenser fan motor in response to refrigerant condensing pressure. F. Furnish electronic low ambient control consisting of mixing damper assembly, controlled to maintain constant refrigerant condensing pressure. G. Furnish following safety controls arranged so that operating any one will shut down machine: 1. High discharge pressure switch (manual reset). 2. Low suction pressure switch (automatic reset). 3. Oil pressure switch (manual reset). 4. Provide a timed off cycle. 2.7 CONDENSING UNIT PERFORMANCE A. Provide equipment with capacity as scheduled on Drawings. 2.8 ELECTRICAL CHARACTERISTICS AND COMPONENTS A. Electrical Characteristics: Provide equipment with electrical characteristics as shown on Electrical Drawings. B. Disconnect Switch: Coordinate with Division 26, Electrical. PART 3 - EXECUTION 3.1 INSTALLATION A. Install in accordance with ASHRAE 15. B. Install units level and plumb, firmly anchored in locations indicated; maintain manufacturer's recommended clearances. C. Install refrigerant piping from unit to condensing unit. Install refrigerant specialties specified in Section Refrigerant Piping. AIR-COOLED REFRIGERANT CONDENSERS

11 D. Install connection to electrical power wiring in accordance with Division INTERFACE WITH OTHER PRODUCTS A. Install units on vibration isolators on 4 tall concrete housekeeping pad. Refer to Hangers and Supports for HVAC Piping and Equipment and Vibration and Seismic Controls for HVAC Piping and Equipment. 3.3 MANUFACTURER S FIELD SERVICES A. Furnish cooling season start-up and winter season shutdown service, for first year of operation. If initial start-up and testing takes place in winter and machines are to remain inoperative. Repeat start-up and testing operation at beginning of first cooling season. 3.4 DEMONSTRATION AND TRAINING A. Demonstrate starting, maintenance, and operation of unit. B. Demonstrate low ambient operation during winter testing or service specified above. END OF SECTION AIR-COOLED REFRIGERANT CONDENSERS

12 SECTION FAN COIL UNITS GENERALCONDITIONS OF THE CONTRACT AND DIVISION 1, as applicable, apply to this Section. PART 1 GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. This Section includes constant-volume fan coil units with coils for indoor installations. B. Related Sections: 1.3 SUBMITTALS 1. Section Common Work Results for HVAC. 2. Section Vibration and Seismic Controls for HVAC Piping and Equipment: Product requirements for vibration isolators for placement by this section. 3. Section HVAC Equipment Insulation: Product requirements for insulation for placement by this section. 4. Section Air Duct Accessories: Product requirements for flexible duct connections for placement by this section. 5. Section Common Motor Requirements for HVAC Equipment: Product requirements for electric motors for placement by this section. 6. Section Variable Frequency Controllers. A. Product Data: For each type of fan coil unit indicated. Include the following: 1. Provide line-by-line specification review annotated to certify compliance or deviation. 2. Fan-sound power rating shall be tested in an AMCA Registered Chamber. 3. Certified coil-performance ratings with system operating conditions indicated. 4. Motor ratings, electrical characteristics, and motor and fan accessories. 5. Material gages and finishes. 6. Provide line-by-line specification review annotated to certify compliance or deviation. 7. Complete fan-performance curves with system operating conditions indicated shall be tested in an AMCA Registered Chamber. 1.4 QUALITY ASSURANCE FAN COIL UNITS

13 A. Source Limitations: Obtain fan coil units through one source from a single manufacturer. B. Product Options: Drawings indicate size, profiles, and dimensional requirements of fan coil units and are based on the specific system indicated. Refer to Division 1 Section "Product Requirements." C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use. D. NFPA Compliance: Fan coil units and components shall be designed, fabricated, and installed in compliance with NFPA 90A, "Installation of Air Conditioning and Ventilating Systems." E. ARI Certification: Fan coil units and their components shall be factory tested in accordance with UL 1995 and shall be sent to ETL for testing. F. Comply with NFPA COORDINATION A. Coordinate size and location of structural-steel support members. 1.6 EXTRA MATERIALS A. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents. 1.7 WARRANTY 1. Filters: One (1) set for each fan coil unit. 2. Fan Belts: One (1) set for each fan coil unit fan. A. Furnish one (1) year manufacturer parts and labor warranty for fan coil units. Warranty shall begin from date of Certificate of Substantial Completion. Warranty start date from shipment or start up will not be acceptable. 1.8 DELIVERY, STORAGE, AND HANDLING A. Equipment shall be factory wrapped by the manufacturer prior to shipment to prevent damage due to weather and road debris during transportation and thereafter while in storage awaiting installation. Protection of the complete unit from rusting and water migration must be handled as best suits the circumstances. Store in a place protected from construction traffic and weather. B. All equipment shall remain in manufacturer s protective shipping wrap during construction. Openings must remain protected and covered during construction. If protective wrap has been damaged, the contractor shall provide additional protective wrap as directed by engineer. C. Contractor shall adequately protect equipment from damage after delivery to the project. Equipment shall be completely covered and secured with heavy tarpaulins, drop cloths or other protective coverings as required to protect from inclement weather, moisture, chemicals, construction traffic, plaster, paint, mortar and/or dirt. Do not cover with plastic materials and trap condensate and cause corrosion. Protective covering is in addition to FAN COIL UNITS

14 the manufacturer s original factory packaging. Original factory packaging shall not be deemed as acceptable protection of equipment. D. Do not deliver equipment to the project site until progress of construction has reached the stage where equipment is actually needed or until building is closed in enough to protect the equipment from weather. Equipment allowed to stand in the weather will be rejected, and the contractor is obligated to furnish new equipment of like kind at no additional cost to the Owner. Limit shipment of bulk and multi-use materials to quantities needed for immediate installation. E. Comply with manufacturer's installation instructions for rigging, unloading, and transporting units. F. Protect units from physical damage. Leave factory covers in place until startup of machine. PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: B. Manufacturers: 1. Trane 2. Carrier 2.2 MANUFACTURED UNITS A. Fan coil units shall be factory assembled and consist of fans, motor and drive assembly, coils, filters, stainless-steel condensate pans and accessories. 2.3 CABINET B. Materials: Formed singe-wall foil faced insulated panels, fabricated to allow removal for access to internal parts and components, with joints between sections gasketed. 1. Outside Casing: 18 gauge, baked enamel, galvanized steel (G90). 2. Utility Lugs: For lifting unit and fastening to permanent structure, 8 gauge, galvanized steel (G90). B. Cabinet Insulation: Comply with NFPA 90A or NFPA 90B. 1. Materials: Foil-Faced fiber glass insulation. 2. Thickness: 1 inch. 3. Density: 1 ½ pounds per cubic foot. 4. Thermal Conductivity (k-value): 0.26 at 75 deg F mean temperature. 5. Fire-Hazard Classification: Maximum flame-spread index of 25 and smokedeveloped index of 50, when tested according to ASTM C 411. FAN COIL UNITS

15 C. Access Panels: Same materials and finishes as cabinet complete with threaded bolted fasteners, and gaskets. Inspection and access panels shall be sized and located to allow periodic maintenance and inspections. Provide access panels in the following locations: 1. Fan Section: Inspection and access panels. 2. Coil Section: Inspection panel. 3. Filter Section: Inspection and access panels to allow periodic removal and installation of filters. D. Condensate Drain Pans: Formed sections of non-corrosive material complying with requirements in ASHRAE 62. Fabricate pans with slopes in two planes to collect condensate from cooling coils (including coil piping connections and return bends) when units are operating at maximum catalogued face velocity across cooling coil. 2.4 FAN SECTION 1. Double-Wall Construction: Fill space between walls with 1 inch, 1 ½ pound fiber glass insulation. 2. Drain Connections: Main and auxiliary on same side of fan. Provide auxiliary drain pan under unit above ceiling. A. Fan-Section Construction: Belt-driven centrifugal fans consisting of housing, wheel, and fan shaft, bearings, motor drive assembly, and support structure and equipped with formed-steel channel base for integral mounting of fan, motor, and casing panels. Mount fan with interior spring vibration isolation. B. Centrifugal Fan Housings: Formed- and reinforced-steel panels to make curved scroll housings with shaped cutoff, spun-metal inlet bell, and access panels or doors to allow entry to internal parts and components. 1. Panel Bracing: Steel angle- or channel-iron member supports for mounting and supporting fan scroll, wheel, motor, and accessories. 2. Horizontal Flanged Split Housing: Bolted construction. 3. Drive Frame: Rail mounted, heavy gauge steel to allow frame to slide for easy belt tensioning. C. Fan Assemblies: Statically and dynamically balanced and designed for continuous operation at maximum rated fan speed and motor horsepower. D. Forward-Curved Fan Wheels: Galvanized-steel and/or aluminum/painted steel construction with inlet flange, back plate, and shallow blades with inlet and tip curved forward in direction of airflow and mechanically secured to flange and back plate; caststeel hub swaged to back plate and fastened to shaft with set screws. E. Coatings (exterior only): Baked Enamel F. Shafts: Statically and dynamically balanced and designed for continuous operation at maximum rated fan speed and motor horsepower, with final alignment and belt adjustment made after installation. FAN COIL UNITS

16 1. Turned, ground, and polished Stainless steel with keyway. Ship with a protective coating of lubricating oil. 2. Designed to operate at no more than 70 percent of first critical speed at top of fan's speed range. G. Pre lubricated and Sealed Shaft Bearings: Self-aligning, pillow-block-type ball bearings. 1. Ball-Bearing Rating Life: ABMA 9, L10 of 100,000 hours. H. Belt Drives: Factory mounted, with final alignment and belt adjustment made after installation and with 1.5 service factor based on fan motor. 1. Pulleys: Mechanical cast iron with split tapered bushing; dynamically balanced at factory. 2. Motor Pulleys: Adjustable pitch. Select pulley so pitch adjustment is at the middle of adjustment range at fan design conditions. 3. Belts: Oil resistant, static free. 4. Motor Mount: Adjustable for belt tensioning. I. Fan-Section Source Quality Control: 1. Factory test fan performance for flow rate, pressure, power, air density, rotation speed, and efficiency. Establish ratings according to AMCA 210, "Laboratory Methods of Testing Fans for Rating." J. Inlet/outlet duct collars. Galvanized collars at each inlet and outlet of the unit. Flexible duct connection isolating discharge of scroll from discharge of fan. 2.5 MOTORS 2.6 COILS A. General: Comply with requirements in Section Common Motor Requirements for HVAC Equipment and Division 26. Matched with fan load. B. Maximum Ambient Temperature Rating: 120 degrees F (50 degrees C). A. Coil Sections: Common or individual, insulated, galvanized-steel casings for heating and cooling coils. Design and construct to facilitate removal and replacement of coil for maintenance and to ensure full airflow through coils. B. Water Coils: Self-draining coil fabricated according to ARI Piping Connections: Sweat. 2. Tubes: Copper,.016 inch tube thickness. 3. Fins: Aluminum, 10 fins per inch. 4. Fin and Tube Joint: Mechanical bond. 5. Headers: Seamless copper tube with brazed joints. FAN COIL UNITS

17 6. Frames: Galvanized-steel channel frame. a. Working-Pressure Ratings: 250 psig, 300 deg F. 7. Source Quality Control: Test to 500 psig underwater (2000 psig ultimate strength). C. Refrigerant Coils: Coil designed for use with R-410a refrigerant, fabricated according to ARI 410, connected with soldered fittings. 2.7 FILTER SECTION 1. Capacity Reduction: Circuit for Double control. 2. Tubes: Copper 3. Fins: Aluminum 10 fins per inch. 4. Fin and Tube Joint: Mechanical bond. 5. Suction and Distributor: Seamless copper tube with brazed joints. 6. Frames: 16 gauge, galvanized-steel channel frame. 7. Ratings: Design tested and rated in accordance to UL (UL recognized). a. Working-Pressure Rating: 250 psig. 8. Source Quality Control: 500 psig underwater (2000 psig ultimate strength). A. Filters: Comply with NFPA 90A. B. Filter Section: Provide filter holding frames arranged for vertical orientations, with access panels on both sides of unit. Filters shall be removable from both sides. C. Extended-Surface, Disposable Panel Filters: Factory-fabricated, dry, extended-surface filters with holding frames. 1. Media: Fibrous material formed into deep-v-shaped. 2. Media and Media-Grid Frame: Nonflammable cardboard. D. Replaceable Filter Media: MERV 13 or greater rating in accordance with ASHRAE Test Standard PART 3 EXECUTION 3.1 EXAMINATION A. Examine areas and conditions for compliance with requirements for installation tolerances and other conditions affecting performance. B. Examine roughing-in of steam, hydronic, direct expansion and condensate drainage piping systems and electrical services to verify actual locations of connections before installation. FAN COIL UNITS

18 C. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 INSTALLATION A. Install fan coil units with the following vibration-control devices. Vibration-control devices are specified in Section Vibration and Seismic Controls for HVAC Piping and Equipment. B. Arrange installation of units to provide access space around fan coil units for service and maintenance. 3.3 CONNECTIONS A. Piping installation requirements are specified in other Division 23 Sections. Drawings indicate general arrangement of piping, fittings, and specialties. B. Install piping adjacent to machine to allow service and maintenance. C. Connect piping to low profile fan coil units mounted on vibration isolators with flexible connectors. D. Connect condensate drain pans, to drainage piping. Extend to nearest equipment or floor drain. Construct deep trap at connection to drain pan and install cleanouts at changes in direction. E. Hot- and Chilled-Water Piping: Comply with applicable requirements in Section Hydronic Piping. Connect to supply and return coil tappings with shutoff or balancing valve and union or flange at each connection. F. Condensate Piping: Comply with applicable requirements in Section Hydronic Piping. Connect to supply and return coil tappings with shutoff valve and union or flange at each connection. G. Refrigerant Piping: Comply with applicable requirements in Section Refrigerant Piping. Connect to supply and return coil tappings with shutoff valve and union or flange at each connection. H. Duct installation and connection requirements are specified in Section HVAC Duct and Casings. I. Electrical: Comply with applicable requirements in Division 26 Sections for power wiring, switches, and motor controls. J. Ground equipment according to Division 26. K. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B. 3.4 FIELD QUALITY CONTROL A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect field-assembled components and equipment installation, including piping and electrical connections. Report results in writing. 1. Leak Test: After installation, fill water coils with water and test coils and connections for leaks. Repair leaks and retest until no leaks exist. FAN COIL UNITS

19 3.5 STARTUP SERVICE 2. Charge refrigerant coils with refrigerant and test for leaks. Repair leaks and retest until no leaks exist. 3. Fan Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation. Remove malfunctioning units, replace with new units, and retest. A. Refer to Section Testing, Adjusting, and Balancing for HVAC. 3.5 CLEANING A. Clean units internally, on completion of installation, according to manufacturer's written instructions. Clean fan interiors to remove foreign material and construction dirt and dust. Vacuum clean fan wheels, cabinets, and coils entering air face. B. After completing system installation and testing, adjusting, and balancing fan coil and airdistribution systems clean filter housings and install new filters. 3.6 DEMONSTRATION A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain fan coil units. END OF SECTION FAN COIL UNITS

20 R R MATTHEW R. SICKOREZ EGISTERED PROFESSIONAL ENGINEE E S E L L E CTRICA A TATE OF CALIFORNI PBK ENGINEERS 02 / 09 / 18 Drawing Number: Architecture Engineering Planning Roof Consulting 11 Greenway Plaza Suite 2210 Houston, Texas Description: Project No. : Date: Drawn by: Drawing Reference: Addendum No.:

21 R R MATTHEW R. SICKOREZ EGISTERED PROFESSIONAL ENGINEE E S E L L ECTRICA A TATE OF CALIFORNI PBK ENGINEERS 12 / 08 / 17 Drawing Number: Architecture Engineering Planning Roof Consulting 11 Greenway Plaza Suite 2210 Houston, Texas Description: Project No. : Date: Drawn by: Drawing Reference: Addendum No.:

22