Attachment 2 SOW multi stack humid backflow Final.docx

US Department of Agriculture (USDA)

Statement of Work

Contents

Project USDA ARS Annual Preventive Maintenance for Multistack Chillers, Humidifiers, and Backflow Preventers (CGAHR – 1515 College Ave, Manhattan, KS) General Information

1.0 Scope of Work

Provide annual preventive maintenance for (4) free cool modules and (4) mechanical modules of Multistack Chillers.

Provide annual preventive maintenance for (23) Condair/Nortec steam humidifiers.

Perform annual testing and cleaning service of backflow preventers.

The Contractor shall be responsible for all labor, tools, and materials required to carry out preventive maintenance tasks.

This service contract includes a base year with up to four option years (through 2030). Quotes should show cost to take over service (base year) and separate costs for option years.

A site visit is encouraged. Site visits will be organized by Jason Cherico, Monday–Friday, 8:00 AM–12:00 PM. Contact: jason.cherico@usda.gov or 785-477-3994.

2.0 Background

USDA ARS Center for Grain and Animal Health Research (CGAHR) located at 1515 College Ave, Manhattan, Kansas requires annual preventive maintenance on Multistack Chillers, humidifiers, and backflow preventers. The maintenance ensures optimal performance of equipment to deliver cooling and environmental control to laboratory spaces.

Contractor Requirements

3.0 Technical Requirements / Tasks

A. Multistack Chiller Preventative Maintenance

· Electrical:

Inspect electrical systems for operation, required maintenance, and repair.

Verify operation of electrical service disconnect for HVAC chillers.

Test motors, starters, contactors, relays, electrical terminals, and bus bars for operation and integrity (e.g., continuity and insulation resistance testing).

Tighten and check all electrical connections and contactors; inspect starters.

Check controls and run microprocessor diagnostics.

Meg-ohm compressor motors.

Log amperages and voltages on compressor motors, fan motors, and pump motors.

Check operation of crankcase heaters.

· Perform operational safety checks and maintenance for safety controls:

Verify operation of staging controller.

Check operation of unloaders.

Verify proper operation of flow switches.

Check operation of the chilled water pump.

Performance:

Check gauges and sight glasses during chiller operation.

Inspect refrigerant sight glass for non-condensables; check proper levels for oil and refrigerant.

Log operating temperatures and pressures on all compressor circuits.

Check the operation of crankcase heaters Inspect piping and all components for refrigerant leaks.

Inspect condenser fan blades and set screws for tightness; inspect for cracks and integrity.

Inspect fan blades for cracks and integrity; Lubricate fan bearings.

Clean/degrease unit as necessary.

Have oil analyzed for quality and contaminants.

Inspect or clean (annually) condenser coil.

Verify unit equipment tags are legible and correct; replace as needed.

Check glycol level or heat trace (annually), if applicable.

Review reports and repairs needed with the customer.

B. Condair/Nortec Steam Humidifier Service (23 units) Remove and clean the scale collector tank.

Remove, disassemble, and clean the steam cylinder; replace defective components as necessary.

Inspect steam cylinder receptacle; clean if necessary.

Remove drain pump, disassemble, and clean; replace if necessary.

Remove inlet valve and clean filter insert; replace if necessary.

Inspect filling cup; clean if necessary.

Inspect the unit for level; clean if necessary.

Inspect drain cup; clean if necessary.

Inspect drain line; clean if necessary (decalcify and rinse out).

Inspect steam and condensate hoses for cracks and proper attachment; replace defective hoses.

Water supply inspection:

inspect water hoses for cracks and proper attachment; replace defective hoses. Check supply pipe tightness and clean water filter (if available).

For systems with RO: inspect RO system for proper operation and leaks; inspect pumps per manufacturer specifications.

Inspect electrical connections: ensure cables are correctly fixed and insulation is intact (performed by qualified electrician).

C. Backflow Preventer Testing and Service

· Inspect backflow preventers for any discharge from the relief valve (visual indication of cleaning/repair needs).

· Perform testing for proper operation of the device in compliance with local codes.

· Clean backflow devices as necessary.

· Must file required paperwork with the City of Manhattan, Kansas.

4.0 Government Furnished

No Government-furnished equipment, data, property, or facilities are provided under this SOW.

5.0 Deliverables / Schedule

B. Annual performance of all preventive maintenance tasks to ensure proper operation during seasonal demand.

C. Backflow inspection documentation filed with the City of Manhattan, Kansas, using applicable forms.

D. Final report prepared by the contractor and presented to the COR or location monitor, describing each deficiency and confirming all repairs have been properly completed.

E. Location monitor will confirm completion of full annual maintenance.

F. Costs are expected to remain within budget.

6.0 Travel

The contractor will travel to USDA ARS CGAHR, 1515 College Ave, Manhattan, KS, to provide annual preventive maintenance services. Travel reimbursement, if applicable, shall follow contract terms.

7.0 Contractor’s Key Personnel

Work must be performed by trained and qualified personnel. Personnel shall possess a valid driver’s license or government-issued ID. If required by the contract, the Government may approve key personnel.

8.0 Security Requirements

Contractor personnel shall comply with facility access procedures and any site safety policies while on Government property. Contractor shall coordinate site access with the COR or location monitor.

9.0 Data Rights

All maintenance logs, test records, and reports generated under this SOW shall be provided to the Government. Rights to use and reproduce deliverables are granted to the USDA ARS for Government purposes.

10.0 Section 508 – Electronic and Information Technology Standards Not applicable. This SOW does not acquire electronic and information technology deliverables.

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