Statement of Work - Photos - Record Drawings.pdf

United States Department of Agriculture Agricultural Research Service

STATEMENT OF WORK

Unit Compressor Replacement USDA-Cereal Disease Laboratory (CDL) 1551 Lindig St., St. Paul, MN

DATE: July 22, 2025

TABLE OF CONTENTS

SOW Description

Attachments A. Site Photos B. 2006 Mechanical Record Drawings

END OF TABLE OF CONTENTS

Scope of Work Description

1551 Lindig St., St. Paul, MN

Scope of Work Description:

1. Project Location: Cereal Disease Laboratory 1551 Lindig Street St. Paul, MN 55108

2. Point of Contact at Location: TBA at Award

3. Background:

The cooling system has failed at the CDL building and it has been determined that repair will require replacement of one of the existing compressor units.

4. Scope:

The scope of the project shall be, generally, the removal and replacement of a unit compressor at the Cereal Disease Laboratory including all necessary equipment and labor. Unit compressor and miscellaneous work components to be completed in accordance with this Statement of Work, project specifications and project drawings.

• Reclaim existing MO99 refrigerant using proper handling methods & dispose off-site in accordance with local government requirements.

• Remove existing compressor and dispose off-site. The disposed system will contain oils that need to be considered for proper hazardous waste recycling.

• Crane service will likely be necessary for removing the old compressor off the roof and raising the new one up to the roof. Manual rigging and moving of the compressors would then be required to move them in and out of the RTU to an area that the crane can attach from. See photos for potential crane staging area.

• Perform acid testing of residual system oil, photo for records & document analysis into job report.

• Add an approved acid neutralizer, per oil volume requirements and acid detection level from the acid test.

• Install a new ZR250KCE-TEC-965 compressor.

• Replace compressor contactor for the failed compressor.

• Replace and install suction filter drier cores (2 each) for system clean up.

• Replace and install new liquid line filter drier cores (2 each).

• Replace system liquid line sight glass.

• Perform system leak check with nitrogen, correct leaks and repeat until the system is leak free at 400 psi for a minimum of 2 hours.

• Charge unit with 50 lbs of MO99 refrigerant.

• Perform vacuum pump evacuation with an electronic micron gauge with a target of <500 microns.

• Perform start-up verifying scroll rotation with gauges, and documenting initial voltage and amp draws of each phase. Post readings on the new compressor.

5. Government furnished property: 50 lbs of MO99 refrigerant.

mailto:Karen.broz@usda.gov

6. Other General Requirements:

• Where “Approved Equal” is indicated in the specification of equipment, material or installation; the Owner shall approve all alternate equipment, materials, manufacturers or installation. It shall be the Contractor’s burden to furnish all documentation and / or samples to show equality with specified items. Owner’s decision is final.

• The Contractor shall furnish all labor, materials, equipment, supplies, transportation, utilities, supervision and incidentals for all elements of the work to provide a complete and properly functioning installation in accordance with this Statement of Work, project specifications and project drawings.

• Contractor shall coordinate all work activities with the Owner prior to beginning any work. All work shall be scheduled in a mannersuch that ongoing research is not jeopardized.

• Photographs of the existing equipment are provided in the project’s solicitation package. The Contractor may use the photographs as a reference / resource in developing their bid / proposal. The Contractor shall confirm all existing conditions and dimensions prior to proceeding with any project activities.

Attachments

Notes:

1. The following attachments are included:

A. Site Photos B. Mechanical System Record Drawings

Attachment A: Site Photos

Photo 1: Aerial image of building. Mechanical equipment room outlined in red. Potential crane staging area at north of building in area outlined in yellow.

Photo 2: Mechanical room containing cooling system.

Photo 3: Roof view looking south towards mechanical room.

Photo 5: Close up of Photo 4.

Photo 4: Access to the roof from building interior looking North.

Photo 6: Failed compressor unit to be replaced.

Photo 7: Failed compressor manufacturer information.

Photo 8 and 7: General location and close up of fogged glass to be replaced.

Photo 8 and 9: Liquid line filter drier cores to be replaced.

Photo 10: Existing cooling unit nameplate.

Attachment B: 2006 Mechanical System Record Drawings