Metropolitan Regional Housing Authority Tender No. MET Mechanical Upgrades ADDENDUM NO July 2018

Transcription

1 Metropolitan Regional Housing Authority Tender No. MET Mechanical Upgrades ADDENDUM NO July 2018 The Tender Documents shall be amended and will become part of the Contract Documents. This addendum shall form an integral part of the Tender Documents. See below Addendum 04 from MCA Consultants. The closing date is Wednesday, July 25, 2018 at 2:00 pm local time Page 1 of 1

2 ADDENDUM 04 PROJECT HVAC Services Upgrade Westwood Towers DESCRIPTION Addendum 2 - Mechanical PROJECT NO. MET (MCA: ) DATE July 20, 2018 Please see below items pertaining to the Mechanical & Plumbing Issued for Tender drawing package for the planned renovations at Westwood Towers. These items shall be considered as a (Change, Addition, Deletion, or Clarification) to the tender documents and shall form part of the tender. 1.0 Reference: M-102 New Piping Schematic.1 Change.1 The makeup water entry point (to right of Caleffi hydraulic separator on drawing) is to be changed from the return header to the supply header. 2.0 Reference: M-103 Existing & New Boiler Room Layout.1 Clarification.1 Clarifying Demolition Note 4 REMOVE ENTIRE BREECHING AND CHIMNEY MATERIAL RELATED TO THE BOILERS : Does not refer to removal of the brick chimney; the brick chimney is to remain..2 Change.1 The makeup water entry point (on Detail 2, above hydraulic separator) is to be changed from the return header to the supply header. 3.0 Reference: M-104 Natural Gas Elevation & Schematic.1 Addition/clarification.1 Under Detail 2 Natural Gas Elevation View ; an additional note is added to clarify the note regarding removal/sealing of louvre opening that states: THE LOUVERED OPENING IS TO BE REMOVED AND RELOCATED TO AN ACCEPTABLE LOCATION IN ACCORDANCE WITH B NEW LOCATION TO BE VERIFIED WITH PROJECT MANAGER..2 Change.1 Under Detail 1 Natural Gas Schematic (bottom of drawing); this detail number and title is changed to: DETAIL 3 NATURAL GAS PIPING SCHEMATIC.

3 4.0 Reference: MCA Addendum 1, Item 6.0 Reference: M-105 Controls Schematic and Specifications.1 Deletion/Change.1 Under Addendum 1, Item regarding Boilers and Boiler Pumps (P5, P6, & P7) controls specifications: this item is to be deleted from Addendum 1 (i.e., the corresponding table for Outdoor Air Reset for Boiler HWS Temp should read HWST of 200 F (NOT 190 F). 5.0 Reference: M-106 Mechanical Schedule & Details.1 Change.1 Under Boiler Schedule, the following in bold has changed for Comments : PROVIDE C/W LWCO WITH MANUAL RESET & TEST, CONDENSATE NEUTRALIZATION KIT, SYSTEM TEMPERATURE SENSOR, OUTDOOR AIR TEMPERATURE SENSOR AND BOILER PUMP..2 Under Pump Schedule, the following in bold has changed for pumps P-8 and P-9: PUMP SCHEDULE TAG MANUFACTUER MODEL SERVICE FLOW (GPM) HEAD LOSS (ft./hd) ELECTRICAL (V/Ph/Hz) Motor (HP) P-8 GRUNDFOS MAGNA F INDIRECTS /1/ W P-9 GRUNDFOS MAGNA F INDIRECTS /1/ W.1 Addition.1 Under Notes in Detail 1 Boiler Exhaust Detail, added Note 6 to state: PRODUCT MANUFACTURER TO SUPPLY DETAILS ON STRUCTURAL SUPPORT OF ALL VENTING, BREECHING, AND STACKS AS PART OF SHOP DRAWING SUBMISSION PROCESS..2 Note added near base of stack to state: SLOPE BREECHING TOWARDS BASE TEE AT BOTTOM OF STACK AND INCLUDE DRAIN, COMPLETE WITH NEUTRALIZATION KIT AT EACH BASE TEE (I.E., FOR EACH OF THE 3 SEPARATE STACKS AS PER DETAIL 2 ON M- 103). 6.0 Reference: MCA Addendum 1, Item 9.0 Reference: M-108 Mechanical Specifications 2 of 2.1 Change/Clarification.1 Under Addendum 1, Item ; the following in bold have been changed: The outdoor air temperature (OAT) reset schedule for boiler temperature controls (HWST) has been updated to correspond with the table provided in M-105, and is to read as follows : OAT ( F) HWST ( F) UP TO < OAT < < HWST < OR GREATER 160

4 7.0 Acceptable Products.1 Clarification.1 Pumps (P-1 to P-9): Wilo is an acceptable manufacturer product must match design specifications listed in Pump Schedule on M Expansion Tank (EX-1): Wessels is an acceptable manufacturer product must match design specifications listed in Expansion Tank Schedule on M Reference: MCA Addendum 1, Item 10.0 Reference: E-100 Electrical Plan.1 Addition.1 Under Addendum 1, Item 10.0, the following is to be considered as Note 2: New control panel is shown as a direct connection. This is to be a receptacle in the same location. Supply and install new UPS, APC - ES 8 Outlet 650VA 120V, or equal to provide UPS power to the control panel. END OF ADDENDUM 04

5 Metropolitan Regional Housing Authority Tender No. MET Mechanical Upgrades ADDENDUM NO July 2018 The Tender Documents shall be amended and will become part of the Contract Documents. This addendum shall form an integral part of the Tender Documents. See below Addendum 03 from MCA Consultants. The closing date is Wednesday July 25, 2018 at 2:00 pm local time Page 1 of 1

6 ADDENDUM 03 PROJECT HVAC Services Upgrade Westwood Towers DESCRIPTION Addendum - Mechanical PROJECT NO DATE July 16, 2018 MET Please see below items pertaining to the Mechanical & Plumbing Issued for Tender drawing package for the planned renovations at Westwood Towers. These items shall be considered as a (Change, Addition, Deletion, or Clarification) to the tender documents and shall form part of the tender. 1.0 Reference: General All Trades.1 Clarification.1 Space heat zone labels have been added to all relevant drawings (M-101, M-102, M-103, M-105) for reference: pumps P-1 and P-3 feed to the EAST WING and pumps P-2 and P- 4 feed to the WEST WING..2 Addition.1 Refer to Addendum item below, General Note added to state: 1. ALL CONTROLS WIRING BY CONTROLS CONTRACTOR. 2. LINE VOLTAGE WORK BY ELECTRICAL CONTRACTOR. 2.0 Reference: M-101 Existing & Demolition Piping Schematic.1 Change/Addition.1 Pump P-9 and piping to P-9 has been changed to be removed during demolition. Note to salvage P-9 and turn over to Project Manager..2 Clarification/Deletion.1 Extra hydro expansion tank on right-side of drawing has been removed to avoid confusion; only one expansion tank for demolition. 3.0 Reference: M-102 New Piping Schematic.1 Change:.1 Temperature Sensors (TS) after pumps P-1/P-3 and P-2/P-4, just before tie-in point, have been changed to Temperature Indicators (TI); corresponding with M Order of strainer and pump P-10 have been switched; flow to enter strainer and then pump..2 Addition:.1 Check valves have been added in line with pumps P-8 and P-9..2 Circuit balancing valves (CBVs) have been added after all boiler pumps P-5, P-6, and P-7, after check valves but before ball valves.

7 4.0 Reference: M-103 Existing & New Boiler Room Layout.1 Change:.1 Under Detail 1 Existing Boiler Room Plan : Pump P-10 label has changed to P-9..2 Under Detail 2 New Boiler Room Plan : Pump P-10 label has changed to P-9..3 Drawing title has changed from Boiler Room Plan to Existing & New Boiler Room Layout ; corresponding to title listed on M Addition:.1 Under Detail 1 Existing Boiler Room Plan : Existing pump P-10 has been added to the drawing and labeled..2 Under Detail 2 New Boiler Room Plan : New pumps P-8 & P-9, and existing pump P-10 have been added to the drawing and labeled; corresponding to drawing M Reference: M-104 Natural Gas Elevation & Schematic.1 Change/Addition.1 Detail 1 Natural Gas Schematic : Natural gas (NG) meter has been moved to the rightside of the plan drawing to correspond with elevation drawing (Detail 2); shed has been added and piping has been changed for the new NG meter location..2 A General Note has been added to state the following: 1. CONTRACTOR TO MOUNT NG SUPPLY TO BUILDING CURB ABOVE GRADE. FINAL LOCATION TO BE CONFIRMED WITH PROJECT MANAGER. 2. CONTRACTOR TO SUPPLY SIGNAGE FOR NG SHUT OFF AT METER AND FOR MASTER SHUT OFF IN BUILDING. 3. ALL NG REGULATORS TO BE ADJUSTABLE VENT TYPE AND VENTED IN ACCORDANCE WITH B Reference: M-105 Controls Schematic and Specifications.1 Clarification.1 Label for Tempered has been added to temperature sensor (TS) after control valve (CV1) to identify TS as supply for high and low temperature alarms..2 CV1 label has been added for clarity; corresponding with M-101 and M Changes/Additions/Deletion.1 Temperature sensor added on return header for the new boilers loop; tied into new BAS..2 Control specifications have been changed as follows:.1 Under DHW Recirculation Pump (P10), Note 1: the time has been changed from 1 5 AM to 2 4 AM..2 Under DHW System : Note 1: the following in bold has been added to the beginning of the note: BOILER TO DHW INDIRECT HEATER PUMPS. Note 7: the statement in parenthesis has been deleted, and the following statement has been added: WHEN THERE IS A CALL FOR HEAT AT SAME TIME FOR BOTH DHW INDIRECTS AND EITHER EAST OR WEST SPACE

8 ZONE, THEN DHW SHALL HAVE PRIORITY FOR SHORT DURATION OF TIME: 1-HOUR. Note 8: the following in bold has been added to the end of the note: UNTIL CONDITIONS ARE CORRECTED (TEMPERED TS)..3 Under Building Heating System Pumps : Title: P-5a and P-5b have been changed to P1/P3 and P2/P4. Note 6: ALL CONTROLS WIRING BY CONTROLS CONTRACTOR. Has been deleted (see next bullet)..4 Added GENERAL NOTES which states: 1. ALL CONTROLS WIRING BY CONTROLS CONTRACTOR. 2. LINE VOLTAGE WORK BY ELECTRICAL CONTRACTOR..5 Under Boilers and Boiler Pumps (P5, P6, & P7), corresponding table for Outdoor Air Reset for Boiler HWS Temp : the HWST of 200 F has been changed to 190 F..6 Under Building Thermostatic Mixing Valves (CV2 & CV3), Note 1, corresponding table for Outdoor Air Reset for Building HWS Temp : the HWST of 200 F has been changed to 190 F. 7.0 Reference: M-106 Mechanical Schedules & Details.1 Addition.1 Detail 1 Boiler Exhaust Detail (Typ.) : An additional comment has been added to NOTE:, now states NOTE: TYPICAL OF VENTING FOR EACH OF 3 BOILERS (I.E., 3 SEPARATE STACKS AS PER DETAIL 2 ON M-103) Reference: M-107 Mechanical Specifications 1 of 2.1 Deletion.1 Under : The following note has been deleted, INTERNET CONNECTION TO BE WIRED FROM EXISTING LAN ROOM TO NEW BOILER ROOM CONTROL PANEL FOR FUTURE INTERNET ACCESS, as this is not to be completed by the contractor..2 Addition.1 Added mechanical specification Testing, Adjusting and Balancing for HVAC to state the following: TESTING, ADJUSTING AND BALANCING FOR HVAC CONTRACTOR TO PERFORM TESTING, ADJUSTING, & BALANCING (TAB) ON ALL NEW SYSTEMS IN ACCORDANCE WITH THE FOLLOWING:.1 PRIOR TO BALANCING, CONTRACTOR TO VERIFY THAT:.1 LIQUID SYSTEMS:.1 FLUSHED, FILLED, VENTED..2 CORRECT PUMP ROTATION..3 STRAINERS IN PLACE, BASKETS CLEAN..4 ISOLATING AND BALANCING VALVES INSTALLED, OPEN.

9 .5 CALIBRATED BALANCING VALVES INSTALLED, AT FACTORY SETTINGS..6 CHEMICAL TREATMENT SYSTEMS COMPLETE, OPERATIONAL..2 PERFORM TAB TO FOLLOWING TOLERANCES OF DESIGN VALUES:.1 HYDRONIC SYSTEMS: PLUS OR MINUS 10 %..2 TAB REPORT.1 FORMAT TO BE IN ACCORDANCE WITH REFERENCED STANDARD.2 TAB REPORT TO SHOW RESULTS IN SI UNITS AND TO INCLUDE:.1 PROJECT RECORD DRAWINGS..2 SYSTEM SCHEMATICS..3 SUBMIT 3 (THREE) COPIES OF FINAL TAB REPORT AND 1 (ONE) ELECTRONIC COPY TO OWNER S REPRESENTATIVE FOR RECORD PURPOSES, IN ENGLISH IN D-RING BINGERS, COMPLETE WITH INDEX TABS (ELECTRONIC ONLY SUBMISSION FOR PRELIMINARY REPORT IS ACCEPTABLE)..3 VERIFICATION.1 REPORTED RESULTS SUBJECT TO VERIFICATION BY OWNER S REPRESENTATIVE..2 PROVIDE MANPOWER AND INSTRUMENTATION TO VERIFY UP TO 30% OF REPORTED RESULTS..3 NUMBER AND LOCATION OF VERIFIED RESULTS TO BE AT DISCRETION OF OWNER S REPRESENTATIVE..4 SETTINGS.1 AFTER TAB IS COMPLETED TO SATISFACTION OF OWNER S REPRESENTATIVE, REPLACE DRIVE GUARDS, CLOSE ACCESS DOORS, LOCK DEVICES IN SET POSITIONS, ENSURE SENSORS ARE AT REQUIRED SETTINGS..2 PERMANENTLY MARK SETTINGS TO ALLOW RESTORATION AT ANY TIME DURING LIFE OF FACILITY. MARKINGS NOT TO BE ERADICATED OR COVERED IN ANY WAY..5 COMPLETION OF TAB.1 TAB TO BE CONSIDERED COMPLETE WHEN FINAL TAB REPORT IS RECEIVED AND FORMALLY ACCEPTED BY OWNER S REPRESENTATIVE..6 HYDRONIC SYSTEMS.1 DEFINITIONS: FOR PURPOSE OF THIS SECTION, TO INCLUDE LOW PRESSURE HOT WATER HEATING, CHILLED WATER, CONDENSER WATER, GLYCOL SYSTEMS..2 STANDARD: TAB TO BE TO MOST STRINGENT OF TAB STANDARDS OF AABC, NBC OR NEBB..3 DO TAB OF SYSTEMS, EQUIPMENT, COMPONENTS, CONTROLS SPECIFIED IN OTHER DIVISIONS..4 QUALIFICATIONS: PERSONNEL PERFORMING TAB TO BE QUALIFIED TO STANDARDS OF AABC, NBC OR NEBB..5 QUALITY ASSURANCE: PERFORM TAB UNDER DIRECTION OF SUPERVISOR QUALIFIED TO STANDARDS OF AABC, NBC OR NEBB..6 MEASUREMENTS: TO INCLUDE, BUT NOT LIMITED TO, FOLLOWING AS APPROPRIATE FOR SYSTEMS, EQUIPMENT, COMPONENTS, CONTROLS:

10 FLOW RATE, STATIC PRESSURE, PRESSURE DROP (OR LOSS), TEMPERATURE, SPECIFIC GRAVITY, DENSITY, RPM, ELECTRICAL POWER, VOLTAGE, NOISE, VIBRATION..7 LOCATIONS OF EQUIPMENT MEASUREMENT: TO INCLUDE, BUT NOT BE LIMITED TO, FOLLOWING AS APPROPRIATE:.1 PUMPS. 9.0 Reference: M-108 Mechanical Specifications 2 of 2.1 Change.1 Under : title has changed from BOILER CONTROLLER AND PANEL to now read BAS STANDALONE CONTROLLER..2 Under , Note 7: JACE product number has changed to JACE 8000, the most recent model..3 Under : The outdoor air temperature (OAT) reset schedule for building heating water temperature controls (HWST) has been updated to correspond with the table provided in M-105, and is to read as follows: OAT ( F) HWST ( F) UP TO < OAT < < HWST < OR GREATER Under :.1 The circulator pumps have been changed to P-5, P-6, or P-7..2 The outdoor air temperature (OAT) reset schedule for building heating water temperature controls (HWST) has been updated to correspond with the table provided in M-105, and is to read as follows: OAT ( F) HWST ( F) UP TO < OAT < < HWST < OR GREATER Under , Note 3: Changed to state NOT USED. ; contractor to determine number of inputs/outputs required..2 Addition.1 Under : Added Note 8 to state: PROVIDE EXPANSION MODULES AS REQUIRED..2 Under : Added Note 2 to state:.2 UPS POWER BACKUP.1 PROVIDE FOR THE CONTROLLER, DISPLAY TABLET AND CONTROL SYSTEM A POWER BACK-UP IN THE FORM OF A UPS THAT IS COMPATIBLE, SIMILAR TO PRODUCT APC BACK-UPS ES 8 OUTLET 650VA 120V ON THE CONDITION THAT IT MEETS THE POWER BACK-UP REQUIREMENT FOR THE CONTROLLER COMPLETE SYSTEM. UPS SELECTION SHALL MEET WITH CODES AND TO THE APPROVAL OF THE PROJECT MANAGER.

11 .2 ENSURE CONTROL SYSTEM BE CONNECTED TO GENERATOR POWER IF AVAILABLE ON SITE AND THE GENERATOR POWER SHALL BE FED INTO THE UPS TO ENSURE SMOOTH POWER OUTPUT TO THE CONTROL SYSTEM Reference: E-100 Electrical Plan.1 Clarification.1 New panel shown is to be labelled P2. Please update on this sheet as well as Panel Schedule on E-101. All new equipment is to connect to the new Panel. Refer to panel schedule Reference: E-101 Electrical Plan.1 Clarification.1 See Addendum item above; new panel Is to be labelled P2 on Panel Schedule Responses (Provided in Italics) to Contractor Site Visit Questions 1. DRAWING M-108, SECTION / 1 /.7: WE WOULD LIKE TO PROPOSE OUR ECY-S1000 & HORYZON C7/C10 AS ALTERNATES TO THE CURRENTLY SPECIFIED JACE J-3E & SHUTTLEX50. (DOCUMENTATION ATTACHED). THE ECY-S1000 IS A B-BC BTL LISTED BACENT BUILDING CONTROLLER COMMUNICATING BACNET MS/TP OR BACNET IP WITH EXPANSION CAPABILITY & OPTION FOR WEB IMBEDDED SOFTWARE ALLOWING COMMUNICATION OF ALARMS/EVENTS AND REMOTE VIEWING/ALTERATION OF CONNECTED SYSTEMS. Please provide the specified product. 2. DRAWING M-10: SEQUENCES MENTION SENDING AN ALARM TO MAINTENANCE UNDER PARTICULAR CIRCUMSTANCES. HOW IS THIS INTENDED TO BE ACHIEVED? THE SEQUENCE AND SPECIFICATIONS MENTION THE CONTROLLER TO BE STAND-ALONE, IS IT INTENDED TO SEND AN ALARM THROUGH A WEB BASED SOFTWARE APPLICATION? SEND AN ALARM TO THE TOUCH-SCREEN THAT IS TO BE PROVIDED? The alarms shall be sent using a future internet connection (NIC). 3. On Drawing E100 and Panel Schedule indicates Panel M is to be replaced with a New Panel. Existing Panel M is a Lighting Panel in Front of the Electrical Room. The Panel that currently feeds the Equipment in the Boiler Room is Panel P2 which is in the approx. location as shown on the Drawing. Please confirm. Please see Addendum item 10.0 above. 4. Drawing E100 Detail 2 shows New Boilers to be Electrical connected to Panel P, Panel Schedule indicates Boilers to be connected to New Panel(M?). Please clarify. Please see Addendum item 10.0 above.

12 5. Will MRHA have the Fuel emptied from the Fuel Storage Tank prior to start of work? MRHA shall remove bulk of fuel from fuel storage tank prior to start of work; contractor is responsible to remove remaining fuel and residue, and remove tank. 6. If the Contractor is responsible to remove the Fuel Oil from the Tank can MRHA give a quantity of fuel oil to be disposed of for bidding purposes? Refer to previous question. END OF ADDENDUM 03

13 Metropolitan Regional Housing Authority Tender No. MET Mechanical Upgrades ADDENDUM NO. 2 Thursday, July 12, 2018 The Tender Documents shall be amended and will become part of the Contract Documents. This addendum shall form an integral part of the Tender Documents. The tender closing date has been extended. This tender will now close on Wednesday July 25, 2018 at 2:00 pm local time. Page 1 of 1

14 Metropolitan Regional Housing Authority Tender No. MET Mechanical Upgrades ADDENDUM NO. 1 Wednesday, July 4, 2018 The Tender Documents shall be amended and will become part of the Contract Documents. This addendum shall form an integral part of the Tender Documents..1 The site tour is scheduled for Wednesday, July 11, 2018 starting at 10:00 AM The closing date and time remains the same. Page 1 of 1