Statement_Of_Work_(SOW)_-_ECAO_Chiller_Compressor.pdf
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- Attached to
- ECAO Chiller Compressor Replacement
- Solicitation number
- 140R6026Q0037
About this file
This is a Statement of Work (SOW) for the replacement of a water-cooled chiller system at the Bureau of Reclamation's Eastern Colorado Area Office (ECAO) in Loveland, Colorado. The procurement is for supply with incidental installation services and will be awarded as a Firm-Fixed-Price contract.
The existing chiller is a 50-ton Carrier Model 30HK-050-D-610 reciprocating unit that cools the office HVAC system using lake water. The replacement chiller must be a commercially available, water-cooled unit with 50-ton nominal cooling capacity suitable for 100% duty cycle operation. The chiller must operate on 460 VAC, 3-phase, 60 Hz power and must not exceed the existing electrical limits of 75 amps minimum supply circuit and 100 amps maximum overcurrent protection. The unit must fit within available space dimensions of 9 feet length, 5 feet width, and 6 feet 6 inches height. Refrigerant must comply with ASHRAE Standard 34 with A1 classification preferred; if A2L is proposed, a detection system compliant with UL 60335-2-40 must be provided. The chiller must meet Federal Energy Management Program (FEMP) efficiency requirements and ASHRAE Standard 90.1, produce maximum noise of 70 dB or less, include manufacturer-integrated controls with operational monitoring and diagnostic capabilities, and provide maintenance access to heat exchanger water sides without unit removal.
The contractor must attend a mandatory site verification visit to verify electrical supply, control wiring, water piping connections, space limitations, and access routes. All work must be completed within 90 calendar days after contract award. The contractor is responsible for recovering and disposing of the existing R-22 refrigerant using EPA-certified technicians in accordance with Clean Air Act Section 608 and 40 CFR Part 82 Subpart F, performing all mechanical and electrical tie-ins, integrating the new chiller with the existing Schneider Electric PLC system, and performing startup, testing, and commissioning. The contractor must provide on-site training covering system operation, maintenance procedures, heat exchanger cleaning, and troubleshooting. Required submittals include product data sheets, equipment specifications demonstrating compliance, refrigerant information, Safety Data Sheets for hazardous materials, and post-installation commissioning reports, O&M manuals, and warranty documentation. A minimum one-year warranty covering equipment, parts, and installation workmanship is required, with manufacturer warranties transferred to the Government. The Government will provide site access, technical oversight, utility coordination, and 110-volt power for contractor tools. Work hours are Monday through Friday, 6:30 AM to 3:00 PM, with no weekend or Federal holiday work permitted without prior approval. The contractor is responsible for repairing or replacing any Government property damaged during performance at no additional cost.
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Text version
STATEMENT OF WORK (SOW)
ECAO Chiller Assembly Replacement
Supply Purchase with Incidental Installation
1. Overview
The Bureau of Reclamation, Eastern Colorado Area Office (ECAO), requires the supply and incidental installation of a new commercially available water-cooled chiller equivalent in function and performance to the existing unit currently serving the facility.
The existing chiller is a 50-ton raw water-cooled reciprocating liquid chiller:
Carrier Model: 30HK-050-D-610 Serial Number: 2801Q00606
The chiller provides cooling for the ECAO office HVAC system. Heat is removed through piped lake water which passes through the condenser and is discharged back to the lake. Water cooled by the chiller is circulated to office spaces for temperature conditioning.
The ECAO main office is located at:
Bureau of Reclamation – Eastern Colorado Area Office 11056 West County Road 18E Loveland, Colorado 80537
This procurement is a purchase of supply with incidental installation services and will be awarded as a Firm-Fixed-Price contract.
2. Scope of Work
The Contractor shall furnish all labor, supervision, equipment, tools, materials, transportation, and incidentals necessary to:
• Supply a new water-cooled chiller meeting the specifications in this Statement of Work
• Remove the existing chiller and associated components
• Recover and dispose of refrigerant in accordance with EPA regulations
• Perform mechanical and electrical tie-ins to existing building systems
• Integrate the new chiller with the existing HVAC control system
• Perform startup, testing, and commissioning
• Provide system documentation and operator training
• Provide warranty support for installed equipment
Site Verification Visit
Offerors shall attend a site verification visit prior to submitting a quotation.
The purpose of the visit is to allow offerors to verify field conditions that may affect equipment selection, installation, and pricing.
Offerors shall verify, at a minimum:
• Electrical power supply and breaker capacity
• Control wiring and PLC interface points
• Supply and return water piping connections and flow rates
• Physical space limitations within the mechanical room
• Access routes for removal of existing equipment and installation of the new chiller
• Installation clearances and service access
Failure of the Contractor to verify existing site conditions prior to quotation submission shall not constitute grounds for additional compensation after award.
3. Salient Characteristics
The replacement chiller shall meet the following minimum requirements.
General
• Water-cooled chiller
• Nominal 50-ton cooling capacity
• Suitable for commercial HVAC applications
• Designed for 100% duty cycle operation during peak cooling demand
• Installed in an indoor mechanical room
Electrical Requirements
• 460 VAC
• 3-Phase
• 60 Hz
Existing electrical system:
Minimum supply circuit: 75 amps Maximum overcurrent protection: 100 amps
The replacement chiller shall not exceed these limits.
Refrigerant Requirements
Refrigerant shall comply with: ASHRAE Standard 34 Refrigerant Safety Classification
Preferred refrigerant classification: A1
If an A2L refrigerant is proposed:
• A refrigerant detection system shall be provided
• The system shall comply with UL 60335-2-40
Refrigerants shall comply with:
• EPA Significant New Alternatives Policy (SNAP)
• 40 CFR Part 84 restrictions on hydrofluorocarbons
Noise Requirement
Maximum allowable noise level: 70 dB or less
Measured inside the mechanical room when the chiller is operating and the air handler is not running.
Control System
The chiller shall include a manufacturer-integrated control, alarm, and diagnostic panel capable of:
• Operational monitoring
• Fault indication
• Alarm notification
• Diagnostic troubleshooting
Energy Efficiency
Equipment shall comply with:
• Federal Energy Management Program (FEMP) efficiency requirements
• ASHRAE Standard 90.1
Documentation demonstrating compliance shall be provided.
Maintenance Access
Heat exchanger water sides shall be accessible for routine cleaning without removing the chiller or disassembling major components.
Maintenance procedures shall be explained during staff training.
4. Equipment Space Limitations
The replacement chiller shall fit within the existing installation area.
Available installation space:
Length: 9 ft Width: 5 ft Height: 6 ft 6 in
Existing equipment pad:
Length: 5 ft Width: 4 ft Height: 3 in
Ceiling height in mechanical room: 10 ft 3 in
Contractor shall verify space conditions during the site visit.
5. Removal and Disposal of Existing Equipment
The Contractor shall remove the existing chiller and associated components from Government property.
The existing system contains R-22 refrigerant.
The Contractor shall:
• Recover refrigerant using EPA-certified technicians
• Handle refrigerant in accordance with Clean Air Act Section 608
• Comply with 40 CFR Part 82 Subpart F
Recovered refrigerant shall be reclaimed, recycled, or disposed of in accordance with applicable regulations.
Safety Data Sheets (SDS) shall be provided for all hazardous materials used during contract performance.
6. Installation Requirements
The Contractor shall install the replacement chiller in the same location as the existing unit.
Installation activities include:
• Mechanical connection to existing piping systems
• Electrical connection to the existing electrical panel
• Installation of piping, valves, fittings, and accessories as required
• Use of galvanically compatible materials to prevent corrosion
Removable pipe fittings shall be used where feasible to facilitate maintenance.
Water System Conditions
The system uses untreated lake water which may contain sediment and biological debris.
If additional filtration, pumps, or ancillary equipment are required for proper operation, the Contractor shall provide and install such equipment as part of the contract price.
HVAC Control Integration
The new chiller shall integrate with the building HVAC programmable logic controller (PLC).
The existing control interface includes:
• Start/stop control signal
• Alarm status signal
The PLC system is a Schneider Electric system.
7. Startup, Testing, and Commissioning
The Contractor shall perform startup and commissioning of the installed system in accordance with manufacturer recommendations.
Startup activities shall include:
• Verification of electrical connections
• Verification of refrigerant charge
• Operational testing of the chiller system
• Verification of water flow rates
• Verification of PLC interface and control signals
• Verification of alarms and safety systems
A Commissioning Report shall be submitted to the ECAO Technical Point of Contract (POC) prior to final acceptance.
8. Training
The Contractor shall provide on-site training for Government maintenance personnel covering:
• System operation
• Routine maintenance procedures
• Cleaning of heat exchanger surfaces
• Troubleshooting procedures
9. Submittals
The Contractor shall provide the following submittals:
• Product Data / Cut Sheets (Chiller specifications, capacity, electrical requirements, dimensions)
• Equipment Specifications (Performance data demonstrating compliance with SOW requirements)
• Refrigerant Information (Type, safety classification, SNAP compliance)
• Shop Drawing / Layout (if applicable) (Only if needed to confirm fit in existing space)
• Safety Data Sheets (SDS) (For refrigerant and any hazardous materials)
Post-Installation Submittals:
• Commissioning Report
• Operation and Maintenance (O&M) Manuals
• Warranty Documentation
10. Warranty
The Contractor shall provide a minimum one-year warranty covering:
• Equipment
• Parts
• Installation workmanship
Manufacturer warranties shall be transferred to the Government.
11. Period of Performance
All installation and commissioning work shall be completed within 90 calendar days after contract award
12. Government Responsibilities
The Government will provide:
• Site access
• Technical POC oversight
• Utility coordination
• 110-volt power for contractor tools during installation
13. Work Hours
On-site work shall occur during the following hours:
Monday through Friday
6:30 AM – 3:00 PM
No work shall be performed on weekends or Federal holidays without prior approval.
14. Damage to Government Property
The Contractor shall be responsible for any damage to Government property caused during contract performance.
All damage shall be repaired or replaced at no additional cost to the Government.
| 1. Overview |
| 2. Scope of Work |
| Site Verification Visit |
| 4. Equipment Space Limitations |
| 5. Removal and Disposal of Existing Equipment |
| 6. Installation Requirements |
| Water System Conditions |
| HVAC Control Integration |
| 7. Startup, Testing, and Commissioning |
| 8. Training |
| 9. Submittals |
| 10. Warranty |
| 11. Period of Performance |
| 12. Government Responsibilities |
| 13. Work Hours |
| 14. Damage to Government Property |
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