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Solicitation 36C10D25Q0020 Replace Chiller at VBA Montgomery Regional Office Questions and Answers Set #1 12-4-2024 What is the setpoint or setpoint range the chiller will need to supply cold fluid at... Solicitation 36C10D25Q0020 Replace Chiller at VBA Montgomery Regional Office Questions and Answers Set #1 12-4-2024 What is the setpoint or setpoint range the chiller will need to supply cold fluid at? 44 Degree supply It is mentioned as 187 tons, but what is needed in terms of BTU/hr at the lowest used setpoint? The tonnage is based on the building design, the unit is designed to fluctuate based on the demand. Can not provide an answer that detailed as the system operates based on chilled water supply temp. One day it may need 150 tons of cooling the next only 40. Outside air temp also plays a role to as to when the unit will actually run or not. What are the climate conditions at the site, ie high/low worst case ambient temps? Geographic location? Elevation? Hot and humid summers 95 degrees plus, mild to cold winters mid to low teens at times. Middle of the state land locked. Elevation is approximately 220 feet above sea level. For PLC communications, we can supply MODBUS TCP/IP and if needed we can offer BAC-NET as well, what would be the preference. The preference is to maintain Metasys controls through-out the operational circuit. We do not want a hodge podge of circuity controls to maintain the climate control system. The SOW has the requirement to perform a pressure and vacuum test . This is very unusual requirement for and air-cooled chiller and will add cost to the project. Is this a firm requirement? This would only be required if the system does not come factory charged. The SOW has the requirement to Conduct a partial drain and treat the chilled water system with a dyed glycol solution to prolong system operation. Refill chilled water system to capacity and return to service. Is the intent of this statement to perform a leak check for the entire chilled water system? No, there are no indications of the system leaking. What percentage of glycol is required? 10% of approximately 4200 gallon system capacity Does the 187-ton chiller rating account for the glycol derating? Yes The SOW has the requirement to Charge new unit with factory recommended refrigerant. It is very unusual for an air-cooled chiller to be shipped without the refrigerant installed and will add cost to the project. Only if it does not come pre-charged. Is this a firm requirement? Only if it does not come pre-charged. The SOW has the requirement to perform vibration analysis on new chiller . This is very unusual requirement for and air-cooled chiller and will add cost to the project. If there is factory provided vibration analysis, that will satisfy this requirement. Air cooled units are notorious for having vibration issues that cause mechanical piping failures that create catastrophic refrigerant losses and create unnecessary repairs. Is this a firm requirement. Please confirm this is the correct name plate data. Yes Confirm that the 187-ton chiller is the nominal tonnage and the chiller to be provided will be selected for the power and pipe size of the existing chiller or is the power feed to be changed based on chiller tonnage. Please provide the type of compressors and refrigerant type, screw or scroll, etc. Yes, the tonnage is nominal. Refrigerant type would be factory recommended. Screw compressors. Please provide photos of the existing chiller name plate with: See question #9 Manufacturer and Model No. Serial No. Power, voltage, amperage, etc MOP for power feed disconnect. Please provide a photo of the disconnecting means for the chiller. ie, is the chiller provided with a Circuit Breaker or Disconnecting means? Is the chiller powered from an existing field disconnect or MCC at the site? Field disconnect fed from main switch board Please provide Chiller flow rate and pipe size. 350 GPM with 6 piping. Please provide thickness and type of insulation for new pipe. 1 foam rubber Please provide specifics that the proprietary BAS Vendor is to add or make changes to the existing JCI BAS System. No changes are requested to be made to the BAS system Please provide a Google Earth shot of location or photo to show service area for a crane to remove and replace chiller. Location 1 would require a larger crane to do the lift up and over the building. Location 2 requires the removal of a 40-50 foot cypress tree to have a straight line to the chiller pad up and over the building. Location 2 is a shorter lift. Please provide if the glycol is ethylene or propylene and the concentration for this system. Provide the dye color of glycol to be added. Propylene, green Please provide a photo of piping isolation valves for the draining of the glycol. The system has a treatment station installed inside the pump room. Is this AN EQUAL Solicitation or is this a proprietary solicitation? Equal that meets the specifications in the SOW. Please designate the location for the temporary chiller. Where is the temporary chiller to be powered from? Temp chiller to be located outside of chiller pad and fed from the current disconnect. What type of chiller do they want to replace it with, Variable speed compressors or standard compressors? Variable Speed Existing Chiller is 175Ton Scroll Compressor. In the SOW it states 187Ton, Customer stated wanted to keep close to 175Ton. What is the preferred tonnage of new chiller? Research has found that the current chiller tonnage is no longer available from the current manufacturer, so therefore the facility selected the next higher unit size that did not require changing of additional components such as piping, disconnects, and or pumps. Does the disconnect need to be replaced? No Screw or Scroll compressor? Screw Can crane lifts and work be performed on weekends or after hours? Currently all work is planned for normal business hours Monday Friday 8:00 am to 4:30 pm CST.

Inactive Service-Disabled Veteran-Owned Small Business (SDVOSB) Set-Aside (FAR 19.14)

4 STATEMENT OF WORK FOR CHILLER REPLACEMENT MONTGOMERY VA REGIONAL OFFICE DESCRIPTION: Replace 187-ton air cooled chiller PLACE OF PERFORMANCE: Montgomery VA Regional Office 345 Perryhill Road Montgom... 4 STATEMENT OF WORK FOR CHILLER REPLACEMENT MONTGOMERY VA REGIONAL OFFICE DESCRIPTION: Replace 187-ton air cooled chiller PLACE OF PERFORMANCE: Montgomery VA Regional Office 345 Perryhill Road Montgomery, AL 36109 BACKGROUND: The Montgomery VA Regional Office air cooled chiller has begun to show signs of degradation in that one compressor has been replaced, Variable Speed Drive control board replaced, several refrigerant charge losses due to piping failure and evaporator seal failure. This unit is the only means of climate control and therefore is a vital system to the facility m1ss1on. SCOPE: The contractor shall provide all labor, supplies, transportation, and equipment to replace the air cooled chiller at Montgomery VA Regional Office. CERTIFIED TECHNICIANS: Certified technicians are required in the performance of system start-up as the facility uses Metasys for its Building Automation System (BAS). All connections, testing, and certifications of controls hardware shall be performed by Johnson Controls factory certified technicians. PERFORMANCE REQUIREMENTS: 187 Ton Chiller Replacement: Lock out and tag out of existing machine. Installation of temporary chiller and make required electrical and mechanical connections. Place in service. Removal of existing unit from service and crane off. Installation of new unit onto existing chiller pad. Vendor to verify new unit will properly fit on existing pad. Increase pad size as needed to accommodate new chiller if dimensions fall outside current pad sizes. Perform pressure and vacuum test of new chiller to verify no leaks from factory and transport. Upon successful tightness test continue with the following: Perform shutdown of temporary unit, lockout/tagout of electrical and mechanical connections. Remove from service. Conduct a partial drain and treat the chilled water system with a dyed glycol solution to prolong system operation. Refill chilled water system to capacity and return to service. Perform all electrical and mechanical connections to new chiller. Ensure that all BAS control/monitoring points are properly connected and visible on the BAS software. Remove lockout/tagout. Charge new unit with factory recommended refrigerant. Factory certified technician to perform start-up of new unit and place in service. Ensure all machine safety parameters are programmed. Perform vibration analysis on new chiller. Place chiller in service. Cleanup and Disposal: Housekeeping: The contractor shall maintain a clean work environment, keeping surfaces in the area free of dust and debris. If the COR and/or designated representative, finds the area unacceptable, the contractor, at his/her own cost, shall re-clean until acceptance is gained. Disposal of Trash and Hazardous Waste: The contractor shall be responsible for the cleanup and removal of all trash and debris from VA property after the Government's final acceptance of work. The contractor shall comply with OSHA, EPA, the Department of Transportation (DOT), State, and all other applicable regulations governing the proper handling, disposal, and removal of all waste and debris. SPECIFIC TECHNICAL REQUIREMENTS: Required Contractor Reporting: A full detailed report shall be generated; the contractor shall provide the COR with three (3) hard copies at the conclusion of all performance requirements. If there is a need for work to be performed beyond the scope of this contract, the contractor shall provide a written cost estimate for any work or materials at no additional cost to the Government. The contractor shall not perform any work or make any purchases beyond the scope without approval from the Contracting Officer. Testing and Acceptance: All equipment shall be tested prior to the Government's final acceptance. All hard copies of Commissioning, Performance, Testing reports, and all new equipment and control technical manuals, including specification documents, must be provided to the COR, or designated representative prior to the Government's final acceptance. All Operator 4-hour training must be completed prior to the Government's acceptance. Security Requirements: While on VA property, all contractor personnel shall comply with the rules, regulations procedures governing the conduct of personnel and the operation of the facility. Prior to the commencement of any work under this contract, upon arrival to the VA Regional Office, contractor personnel shall first check-in with VA Police to obtain an identification badge. The contractor employee must safeguard the badge and immediately report if the badge is lost, stolen, or destroyed to the VA Police. Contractor personnel shall properly display their identification badge at all times while on VA property so that their name and the company they work for can easily be seen. All contractor personnel shall properly sign out with VA Police upon the completion of this contract. Interference in Performance Requirements: The following provisions shall be adhered to by contractor personnel throughout the duration of this contract: Contractor may be required to interrupt their work at any time so as not to interfere with the normal functioning of the facility, e.g. utility services, servicing of fire protection systems, and the passage of facility patients/personnel, etc. In the event of an emergency, contractor services may be stopped and rescheduled at no additional cost to the government. Contractor personnel shall inform the COR of the need to gain access to secured areas. If access is required to secure areas, prearranged scheduling will be made by the COR. Warranty: All performance requirements shall come with a one-year warranty (minimum). Contractor Responsibilities: The contractor shall be responsible for the actions of all individuals provided to work for the VA under this contract. Should damages arise for work performed by contractor provided personnel, the contractor shall be responsible for all resources necessary to remedy the incident. The Contractor shall be responsible for ensuring all provided personnel are properly licensed to operate a motor vehicle if operating a motor vehicle on VA property is required. PERIOD OF PERFORMANCE: A Performance Duration: Due to the nature of this project and unknown lead times, this project has a projected period of perfonnance of 270 days from the Notice to Proceed. Performance Schedule: All work shall be performed Monday through Friday (except Federal Holidays), 7:00 AM Central - 3:30 PM Central) Site Visits: If a site visit is required, prospective contractors shall coordinate a site visit with the COR or a designated representative of the Montgomery VA Regional Office SSD department via assigned contracting officer.