RE: Phase 2 Improvements DATE: July 1, 2016 New Administration Building Wernle Youth & Family Treatment Center 2000 Wernle Road Richmond, Indiana
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1 ADDENDUM NO. 2 RE: Phase 2 Improvements DATE: July 1, 2016 New Administration Building Wernle Youth & Family Treatment Center 2000 Wernle Road Richmond, Indiana TO: All Bidders Gentlemen: This Addendum shall hereby be and become a part of the Contract Documents the same as if originally bound thereto. The following clarifications, amendments, additions, revisions, changes, and modifications change the original Contract Documents only in the amount and to the extent hereinafter specified in this Addendum. NOTE: Bidders are responsible for becoming familiar with every item of this Addendum. ITEM NO. 1: PROJECT MANUAL; NOTICE TO BIDDERS A. Change the bid due date to Friday, July 29. The place and time will remain unchanged. ITEM NO. 2: PROJECT MANUAL; SECTION BUILDING WRAP; B. PRODUCTS A. Add new item 2. As follows: 2. Moisture Barrier: Shall be either an air barrier of coated, non-woven, nonperforated, spunbonded polyolefin fabric suitable for adhering to concrete or a silylterminated polyether polymer liquid for fluid application to concrete. a. Products: 1) Tyvek Fluid Applied WB : Dupont 2) Typar MetroWrap : Fiberweb with manufacturer s recommended adhesive. ITEM NO. 3: PROJECT MANUAL; SECTION 0831 ACCESS PANELS; B. PRODUCTS; 3. ACCESS PANELS A. Add sub-item b. as follows: b. Suspended Acoustical Tile Ceiling Hatch: Shall be Model KSTE/CAD Ceiling Access Hatch, 24"x48", as manufactured by Karp Associates, Melville, NY or Architect approved equal. Locate in Files 223 centered below attic access panel as close as possible.
2 ADDENDUM NO July 1, 2016 ITEM NO. 4: PROJECT MANUAL; SECTION SEQUENCE OF OPERATIONS FOR HVAC CONTROLS A. Add Domestic Booster Pump BP-1" to the points list. Refer to the attached, revised points list in the replacement Section ITEM NO. 5: DRAWING SHEET M2.0 A. Revise relief air ductwork as shown on attached Supplemental Information Drawing 817M B. The floor/ceiling assembly above Mechanical 120 is UL Assembly #L528. Ducts penetrating this assembly shall have fire dampers listed for use with this assembly. Fore dampers shall be serviceable from the mechanical room. C. The attic assembly above the duct chase in UL Assembly #P522. Ducts penetrating this assembly shall have fire dampers listed for use with this assembly. Fire dampers shall be accessible for service. ITEM NO. 6: DRAWING SHEET M3.1 A. Revise relief air ductwork as shown on attached Supplemental Information Drawing 817M ITEM NO. 7: DRAWING SHEET M4.1 A. Revise Roof Cap Schedule as shown on attached Supplemental Information Drawing 817M B. All roof mounted mechanical equipment shall be painted dark bronze. Custom color to be approved by Architect. C. Louver L-1 shall be silver with clear anodized finish. ITEM NO. 8: DRAWING SHEET CE1.0; ELECTRICAL SITE PLAN A. Refer to attached Supplemental Information Drawing 817CE for raceway associated with technology. ITEM NO. 9: DRAWING SHEET E1.0 A. Lower Level Electrical Power Plan: 1. Refer to attached Supplemental Information Drawing 817E a for locations of added security devices. 2. Refer to attached Supplemental Information Drawings 817E a and 817E b for electrical revisions associated with the lower level.
3 ADDENDUM NO July 1, 2016 B. Upper Level Electrical Power Plan: 1. Refer to attached Supplemental Information Drawing 817E b for locations of added security devices. 2. Refer to attached Supplemental Information Drawing 817E c for electrical revisions associated with the upper level. ITEM NO. 10: DRAWING SHEET E5.1 A. Refer to attached Supplemental Information Drawing 817E a for security riser. ITEM NO. 11: DRAWING SHEET E5.2 A. Refer to attached Supplemental Information Drawing 817E for revisions to panel 1L1. END OF ADDENDUM NO. 2 All bidders must acknowledge receipt of this Addendum in their bid.
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15 SECTION SEQUENCE OF OPERATIONS FOR HVAC CONTROLS PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division 1 Specification sections. B. Division 23 Section "Common Work Results for HVAC". C. Division 23 Section "Facility Management Systems". 1.2 DESCRIPTION OF WORK A. Sequence of operation is hereby defined as the manner and method by which controls function. Requirements for each type of control system operation are specified in this section. B. Operating equipment, devices, and system components required for control systems are specified in Division 23 Section "Facility Management Systems". C. HVAC Systems shall be controlled with a Direct Digital Control (DDC) system, sometimes referred to as a Facility Management System (FMS), according to the point list contained at the end of this section. Additional hardware, input/output points or software programming not specifically identified in the point list but which are required to meet the following sequences of operation shall be provided. D. All electrical Controllers, Relays, Transducers, etc., required for stand-alone control shall be housed in a NEMA 1 enclosure with a lockable door. 1.3 DEFINITIONS A. FMS: Facility management system B. DAT: Discharge air temperature. C. VSD: Variable speed drive.
16 D. DX: Direct expansion. PART 2 - PRODUCTS (Not Applicable) PART 3 - EXECUTION 3.1 ALARMS A. Generate an alarm at the computer graphics when any space temperature is <50 def F for 15 minutes (adjustable) and an immediate alarm when any space temperature is <40 deg F (adjustable). B. Coordinate with the owner to identify alarms as "general" or " critical". General alarms will only be displayed at the computer graphics. Critical alarms will be displayed in the computer graphics program and dialed-out, ed, or text messaged to pre-programmed telephone numbers and address via the internet. 3.2 MONITORING SEQUENCES A. Monitor space temperature of IT Server Room and generate an alarm message at the computer graphics if space temperature falls below 50 deg F or rises above 76 deg F during occupied mode. Generate a critical alarm if space temperature falls below 40 deg F or rises above 80 deg F during occupied or unoccupied mode. B. Monitor status of electrical generator transfer switch. On a loss of utility supplied power, generate an alarm at the computer graphics stating LOSS OF UTILITY POWER. The following equipment shall be disabled by the FMS until utility power is restored: Chiller-X, P-X, AHU-X. 3.3 HVAC ZONE CONTROL SEQUENCES A. Provide software time clock and set-up schedule to place each HVAC system into occupied or unoccupied mode. Provide an override push button on each space temperature sensor to place the respective zone air handler into the occupied mode for a two hour period (adjustable) when button is pushed. When the button is pushed again prior to the override time expiring, the zone air handler will revert to the scheduled operating mode.
17 AIR HANDLING UNITS CONTROL SEQUENCES A. Safety Controls for Air Handling Units: 1. Provide a low-limit controller to prevent unit discharge air from falling below 45 deg F (adjustable). Sensor shall be located at the discharge of the unit. 2. Provide an electric low limit thermostat with a 20 foot element serpentined across the face of the leaving air side of the heating coil which will stop the supply fan, close the outside air damper (and relief dampers if applicable) and position heating control valve for full coil water flow. 3. Provide strap-on aquastat on the leaving water side of the hot water coil to, close the outside air damper (and relief dampers if applicable) and position control valve for full coil water flow if leaving water temperature drops below 40 deg F (adjustable). 4. Provide a high-limit controller to prevent unit discharge air from rising above 125 deg F (adjustable). Sensor shall be located at the discharge of the unit. B. AHU-1 & 2 (Variable Air Volume Supply Fan): 1. Occupied Mode: Supply fan shall operate continuously. Variable speed drive (VSD) shall modulate supply fan to maintain the variable air volume (VAV) terminal unit with the greatest call for cooling at least 85% open. Increase duct static pressure at a rate of 0.25 every 10 minutes (adjustable) until any VAV terminal unit exceeding 95% open, closes down to 85% open. Duct static pressure shall be determined by pressure sensors located 2/3 down the longest duct run or as shown on the drawings. A high limit discharge pressure sensor, located at the fan discharge, shall prevent the supply fan from generating a discharge pressure greater than 6.5 w.c. (adjustable). The outside air damper shall be opened to provide minimum outside air. Minimum outside air volume shall be maintained by modulating outside air damper and return air damper as required to maintain a constant differential pressure between the outside air duct (pickup point located immediately upstream of the outside air damper) and outdoors. If outside air dry bulb temperature is less than space and cooling is required, modulate outside air damper open to provide outside air economizer cooling. A mixed air temperature controller shall maintain a minimum DAT of 55 deg F.
18 Modulate the hot water coil control valve and stages of DX cooling as required to maintain DAT set point. Reset DAT to maximum possible temperature to satisfy zone with the greatest call for cooling. Minimum DAT shall be 42 deg F (adjustable). If any space or return duct humidistat is not satisfied, reset the DAT to minimum set point until all relative humidity s are 2% below set point. DAT shall be set to minimum level and zone VAV terminal unit shall provide reheat as required to maintain space temperature set point. 2. Unoccupied Mode: Close outside air damper, cycle unit supply fan with full hot water flow to maintain reduced set point temperature. If space humidity exceeds set point, the unit shall be placed into occupied mode until space humidity is 5% RH below set point. 3. Morning Warm-Up: Dependent on space and ambient conditions, the FMS shall determine optimum start time to return zones temperature to their occupied set points 5 to 10 minutes prior to occupied schedule. The outside air damper shall close and the return air damper shall open to its maximum position, hot water coil control valve shall modulate to maintain a maximum 125 deg F (adjustable) discharge air temperature, VAV terminals primary air valve shall open to full flow. As a zone reaches occupied heating set point, VAV terminal primary air valve and reheat valve shall modulate to prevent zone over heating. This cycle shall continue until all zones have reached their occupied heating set point temperature. 4. Morning Cool-Down: Dependent on space and ambient conditions, the FMS shall determine optimum start time to return zones temperature to their occupied cooling set points 5 to 10 minutes prior to occupied schedule. The outside air damper shall close and the return damper shall open to its maximum position with stages of DX cooling to maintain a discharge air temperature of 50 deg F, VAV terminal units shall operate as under normal occupied mode. This cycle shall continue until all zones have reached their occupied cooling set point temperature. 3.5 EXHAUST FAN CONTROL SEQUENCE A. EF-4: Continuous operation. B. EF-1 & 2: Operate during occupied cycle of AHU-1, off otherwise. C. EF-3: Operate during occupied cycle of AHU-2, off otherwise. D. EF-5: Operate with a piloted wall switch.
19 SINGLE DUCT SHUT OFF VAV TERMINAL UNIT WITH HOT WATER REHEAT A. Occupied Mode: Modulate open primary air valve with a rise in space temperature. With a fall in space temperature, modulate primary air valve towards the minimum setting. With a continued fall in space temperature below the heating set point, modulate open the hot water coil control valve, when valve is 100% open, modulate air valve increasing air flow to maintain space heating set point. If hot water is not available, close primary air valve 100% with a fall in space temperature below heating set point. If the associated occupancy sensor indicates no occupants, the VAV box is to revert to unoccupied temperature setpoints. B. Unoccupied Mode: Open primary air valve, close hot water coil control valve. If the associated occupancy sensor indicates occupants, the VAV box and associated air handler are to revert to occupied mode. C. Refer to sheet E2.0 for occupancy sensors indicated to control associated VAV boxes. D. Morning Warm-Up/Cool-Down & Night Purge: Refer to respective HVAC unit sequence of operation. During morning warm-up, provide maximum primary air with full hot water coil flow until space occupied heating set point is reached at which time reset primary air valve to heating air flow and modulate control valve to maintain set point. 3.7 PUMP CONTROL SEQUENCE A. Boiler Pump (Boiler Primary Hot Water Loop): Cycle with their respective boilers. On a failure to establish flow within 15 seconds after a call to operate, generate an alarm message reading PRIMARY HOT WATER PUMP FAILURE to be automatically displayed in computer graphics and dial out, text messaged, and to pre-programmed addresses and/or numbers. Pump shall continue to operate for a period of 30 seconds following shut down of associated boiler burner. B. P-1 & P-2 (Building Secondary Hot Water Distribution Loop): Variable volume pumping. Energize lead variable volume pump on a call for hot water. Modulate lead pump with a 4-20 ma output to the variable speed drive (VSD) to maintain a 10 PSIG (adjustable) differential pressure across the supply and return mains at location(s) shown. With a failure of the lead pump to establish flow within 15 seconds after a call to operate, start the lag pump and generate an alarm message reading "SECONDARY BUILDING HOT WATER DISTRIBUTION LOOP LEAD PUMP FAILURE" to be automatically displayed in computer graphics and dial out, text messaged, and to pre-programmed addresses and/or numbers.
20 C. HWRP-1 (Domestic Hot Water Recirculation Pump): Pump is to be controlled by an aquastat and enabled during occupied mode by the FMS. 3.8 BOILER AND HEATING WATER CONTROL SEQUENCE A. On a call for hot water the FMS shall energize the hot water distribution pump(s), and packaged controls shall be enabled to maintain the hot water loop temperature. The packaged controls shall activate and stage boilers and their associated pumps as required to maintain the loop supply temperature. The boiler controller shall sequence the boilers and modulate output such that total system efficiency is maximized. The packaged controller shall reset the supply water temperature to satisfy the zone with the greatest heating demand. The packaged controller shall have a set of dry contacts to notify the FMS of any alarm state within the boiler plant or controller.
21 Control Relay Solenoid Pneumatic Transducer Electrical Transducer 4-20 ma or 0-10 VDC Pressure Switch Flow Switch Contact Closure Auxiliary Contact KW Meter Contact Temperature Relative Humidity Set Point Adjustment Psig, Psia, Psid, IN H20 Flow Electrical Current Flow Position Trending Equipment Status Maintenance High Limit Low Limit (Temperature) Run Time Scheduled On/Off Optimum Start/Stop Demand Limiting Totalization Day/Night Setback Economizer Ventilation/recirculation Direct Digital Temp Control Enthalpy Heating or (Global) Cooling HARDWARE SOFTWARE Reset Boiler Optimization OA Reset Chiller Optimization Chilled Water Reset VAV Control Variable Speed Pumping Ice Storage Control Lead/Lag Control Lighting Control Color Graphics Item Outside Air X X X X AHU-1, 2 (VAV) X SUPPLY FAN X X X X X HW VALVES X X X X VAV BOXES X X X SPACE SERVED X X X X HW VALVE X X X X Customer: INPUT/OUTPUT SUMMARY TABLE Location: OUTPUT (O) INPUT (T, D, V, C) ALARMS DGT ANALG DIGITAL ANALOG DGT ANALG EMCS FUNCTIONS Point Description MIXED & SUPPLY AIR X X RETURN AIR X X OA & RA DAMPERS X X X X X SUPPLY DUCT X X X
22 PRIMARY AIR DAMPER X X X X DISCHARGE AIR X X EXHAUST FAN- 1, 2, 3 X X X X I.T. SERVER ROOM X X X Control Relay Solenoid Pneumatic Transducer Electrical Transducer 4-20 ma or 0-10 VDC Pressure Switch Flow Switch Contact Closure Auxiliary Contact KW Meter Contact Temperature Relative Humidity Set Point Adjustment Psig, Psia, Psid, IN H20 Flow Electrical Current Flow Position Trending Equipment Status Maintenance High Limit Low Limit (Temperature) Run Time Scheduled On/Off Optimum Start/Stop Demand Limiting Totalization Day/Night Setback Economizer Ventilation/recirculation Direct Digital Temp Control Enthalpy Heating or (Global) Cooling HARDWARE SOFTWARE P-1, 2 X X X X HWRP-1 X X X Reset Boiler Optimization OA Reset Chiller Optimization Chilled Water Reset VAV Control Variable Speed Pumping Ice Storage Control Lead/Lag Control Lighting Control Color Graphics Item Customer: INPUT/OUTPUT SUMMARY TABLE Location: OUTPUT (O) INPUT (T, D, V, C) ALARMS DGT ANALG DIGITAL ANALOG DGT ANALG EMCS FUNCTIONS Point Description
23 BOILER B-1, 2 X X X X X X X HWS X X X HWR X X FIRE ALARM PANEL X X DIFFERENTIAL PRESSURE X X X EXTERIOR LIGHTING X (2 CONTACTORS) Domestic Booster X X X Pump BP-1 END OF SECTION 23093
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