ADDENDUM 1 CLIENT: PROJECT: TO: FROM: Guilford County Schools (GCS) Southeast High School Auditorium & Gymnasium HVAC Improvements All Prospective Bidders Derrick Giles, SAMR, PLLC. DATE: 6/6/2018 The attached information is intended to clarify questions regarding the construction documents. Please contact Derrick Giles at (336) 988-1769, gilesde@enpulse.com with any questions regarding this addendum, the drawings or specifications. Where any article, division or subparagraph of the original contract documents or other addenda is supplemented herein, the provisions of the original documents shall remain in effect. All the supplemental provisions shall be considered as added thereto. Where any such article, division or subparagraphs are amended, voided or superseded thereby, the provisions of such article, division or subparagraph not so specifically amended, voided or superseded shall remain in effect. The attention of the Contractor is called to the following clarifications, additions to and changes in the advertisement, plans and specifications dated or released: June 1, 2018 on the above job. It will be the responsibility of each Contractor to call such clarifications, additions and changes in plans and specifications to the attention of subcontractors concerned. The Engineer, his/ her Architect, or Consulting Engineers in no way assume any responsibility for notifying any subcontractor, material dealers or others not having received the original contract documents. 1. NOT USED 2. GENERAL See attached scope, bid / project schedule, and site photos. Additional contract documents will be issued via addenda according to the schedule. 1 of 2 P.O. Box 41195 Greensboro, NC 27404
3. ATTACHMENTS 3.1. Project scope and schedule 3.2. Site photos (8) 3.3. Equipment BOD NOTE: Please make sure you acknowledge this addendum on the bid form. END OF ADDENDUM 1 2 of 2 P.O. Box 41195 Greensboro, NC 27404
6/4/2018 SUMMARY OF WORK Southeast High School Auditorium & Gymnasium HVAC Improvements Demolish 4 existing 20 ton, split DX with HW coil units. (Base bid is the 2 auditorium units; alternate bid (add alternate) is the 2 gymnasium units) Provide 4 new 20 ton roof mounted package units with gas heating. Basis of Design is York J20ZRN30R2C5FCA4M1. Reference: Kevin Brese, 336.402.8958 Ductwork shall be furnished from the new RTU, through a vertical exterior wall opening, and tie-in to existing auditorium ductwork Contractor shall provide new conductors, disconnect and 125 A breakers, in existing conduit, to supply electrical power to the new RTUs. Install new gas supply piping Stand alone controls for each RTU See included 8 photos and RTU Basis of Design for reference SCHEDULE Advertisement - 6/4/18 Pre-bid Non-mandatory - Friday, 6/8/18 @ 1 PM (on-site) Last Day for Questions - 6/15/18 Last Day for Addenda - 6/18/18 Bid Opening - 6/20/18 @ 3 PM (Washington St) Construction start - Fall 2018 Contact: Derrick Giles, 336.988.1769, gilesde@enpulse.com
Project Name: GCS-Southeast Series 20 (15-25 Ton Package) N540 Single Package R-410A AC with Reheat Page: 1 Unit Model #: J20ZRN30R2C5FCA4M1 Quantity: 1 Tag #: RTU- Auditorium System: J20ZRN30R2C5FCA4M1 Cooling Performance Total gross capacity 258.1 MBH Sensible gross capacity 189.9 MBH Total net capacity 241.9 MBH Sensible net capacity 173.7 MBH Efficiency (at ARI) 11.00 EER Integrated eff. (at ARI) 13.00 IEER Ambient DB temp. 95.0 F Entering DB temp. 80.0 F Entering WB temp. 67.0 F Leaving DB temp. 58.0 F Leaving WB temp. 56.8 F Power input (w/o blower) 17.67 kw Sound power 92 db(a) Refrigerant Refrigerant type R-410A Sys1 24 lbs Sys2 24 lbs Reheat Performance Total capacity 118.9 MBH Ambient DB temp. 85 F Entering DB temp. 75 F Entering WB temp. 67 F Leaving DB temp. 75 F Leaving WB temp. 62.7 F Power input (w/o blower) 15.78 kw Gallons of water per hour 13.57 gal/hr Gas Heating Performance Entering DB temp. 60 F Heating output capacity (Max) 240 MBH Supply air 8000 CFM Heating input capacity (Max) 300 MBH Leaving DB temp. 87.8 F Air temp. rise 27.8 F SSE 80.0 % Stages 2 Supply Air Blower Performance Supply air 8000 CFM Ext. static pressure 0.6 IWG Blower speed 907 RPM Max BHP of Motor (including service factor) 11.50 HP Duct location Side Motor rating 10.00 HP Actual required BHP 5.66 HP Power input 4.75 kw Elevation 0 ft. Drive type BELT Electrical Data Power supply 230-3-60 Unit min circuit ampacity 101.5 Amps Unit max over-current protection 125 Amps Dimensions & Weight Hgt 53 in. Len 181 in. Wth 92 in. Weight with factory installed options 3055 lbs. Clearances Right 36 in. Front 36 in. Back 24 in. Top 72 in. Bottom 0 in. Left 24 in. Note: Please refer to the tech guide for listed maximum static pressures 20 Ton Johnson Controls Series 20 Units are Manufactured at an ISO 9001 Registered Facility and each Rooftop is Completely Computer-Run Tested Prior to Shipment. Unit Features Two Stage Cooling 300 MBH Input Aluminized Steel, Two Stage Gas Heat Full Perimeter Base Rails with Built in Rigging Capabilities Unit Cabinet Constructed of Powder Painted Steel, Certified At 1000 Hours Salt Spray Test (ASTM B-117 Standards). Either Supply and/or Return can be Field Converted from Vertical to Horizontal Configuration without Cutting Panels Dual Refrigerant Circuits for Efficient Part Load Operation with Scroll Compressors Dry Bulb Low Leak Economizer with Hood (No Barometric Relief Damper or Hood) with Economizer Fault Detection & Diagnostic (Meets ASHRAE 90.1-2013, IECC 2015, California Title 24, AMCA 511) 10 HP High Static Belt Drive Blower Unit Ships with 2" Throwaway Filters Solid Core Liquid Line Filter Driers Replacement Filters: 4 - (16" x 25" x 2" or 4") AND 4 - (16" x 20" x 2" or 4"). Unit accepts 2" or 4" wide filters. Non Powered Convenience Outlet (110 VAC) HACR Circuit Breaker/Disconnect Short Circuit Current: 5kA RMS Symmetrical Single Point Power Connection Through-the-Curb and Through-The-Base Utility Connections Dirty Filter Indicator Switch Phase Monitor Standard Condenser Coil Standard Evaporator Coil Crane Required to Unload Unit Stainless Steel Drain Pan Hinged Filter Door & Tool Free Non-Hinged Blower, Motor, Electrical Access Panels Coil Guard BAS Controller IntelliSpeed control of the VFD based on stages of cooling. Provides Single Zone VAV Fan Operation as defined by ASHRAE 90.1 section 6.4.3.10. Simplicity SE Controller including Discharge Air, Return Air, and Outdoor Air Temperature Sensors. BACNet MS/TP, Modbus and N2 communication card Standard Unit Controller: Simplicity Control Board An Integrated Low-Ambient Control, Anti-Short Cycle Protection, Lead-Lag, Fan On and Fan off Delays, Low Voltage Protection, On-Board Diagnostic and Fault Code Display. Allows all units to operate in the cooling mode down to 0 F outdoor ambient without additional components or intervention. Safety Monitoring - Monitors the High and Low-Pressure Switches, the Freezestats, the Gas Valve, if Applicable, and the Temperature Limit Switch Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/29/2018
Project Name: GCS-Southeast Series 20 (15-25 Ton Package) N540 Single Package R-410A AC with Reheat Page: 2 Unit Model #: J20ZRN30R2C5FCA4M1 Quantity: 1 Tag #: RTU- Auditorium System: J20ZRN30R2C5FCA4M1 on Gas and Electric Heat Units. The Unit Control Board will Alarm on Ignition Failures, Safety Lockouts and Repeated Limit Switch Trips. Warranty One (1) Year Limited Warranty on the Complete Unit Five (5) Year Warranty - Compressors and Electric Heater Elements Ten (10) Year Warranty - Aluminized Steel Tubular Heat Exchangers Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/29/2018
Series 20 (15-25 Ton Package) N540 Single Package R-410A AC with Reheat Page: 3 Project Name: GCS-Southeast Unit Model #: J20ZRN30R2C5FCA4M1 Quantity: 1 Tag #: RTU- Auditorium System: J20ZRN30R2C5FCA4M1 Consolidated Drawing Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/29/2018
Series 20 (15-25 Ton Package) N540 Single Package R-410A AC with Reheat Page: 4 Project Name: GCS-Southeast Unit Model #: J20ZRN30R2C5FCA4M1 Quantity: 1 Tag #: RTU- Auditorium System: J20ZRN30R2C5FCA4M1 Component Locations Unitary Sales Tool v1.5.9.0 Information is subject to change without notice. Check local codes. Printed 05/29/2018