Performance Work Statement.pdf

Performance Work Statement (PWS)

Commercial Services on two Carrier Water Cooled Chillers 19XR 3031267BGH64

08/30/2022

Version 1.0

Vision Statement

1 Introduction

1.1 Mission

1.2 Background

1.3 Scope

2 General Requirements

2.1 Non-Personal Services

2.2 Business Relations

2.3 Contract Administration and Management

2.3.1 Contract Management

2.3.2 Contract Administration

2.3.3 Personnel Administration

2.4 Subcontract Management

Performance Work Statement (PWS)

Commercial Services on two Carrier Water Cooled Chillers

19XR 3031267BGH64

Vision Statement

The enhanced commercial chiller service plan. Keeping our equipment to the highest level of demand and equipment reliability, increased operational time, while always running our equipment most efficiently

1 Introduction

The annual servicing of two HVAC Chillers the maintain conditioned temperature for building #1

1.1 Mission

Keeping our equipment to the highest level of demand and equipment reliability, increased operational time, while always running our equipment most efficiently

1.2 Background

The two Aqua Edge 19XR water cooled are 300-ton centrifugal chillers that use non-ozone depleting refrigerant HFC-134a semi hermetic compression refrigerant cooled Variable frequency drive. The two chillers have been in operation in the year of 2001 and have provided a highly efficient reliability throughout the years.

1.3 Scope

Perform Annual maintenance and tunning for two Carrier water cooled chiller units, furnish all the necessary equipment, tools, and labor to inspect, test, conduct maintenance, start up and tuning of each unit.

I. Inspect and test all Safeties shall be opened and tested for low refrigerant, low temperature, low oil pressure, high condensing pressure, and low water cutoffs.

II. Chiller maintenance, disassemble, inspect heat transfer tubes for leaks, corrosion, and areas of kinking and blockage and adjust actuator linkages.

III. Tube cleaning take before and after pictures, of tubes. Chemically wash and brush tubes clean.

IV. Chiller water loops should be inspected and treated to remove containments, biological growths, corrosion, and scale.

V. Inspect for refrigerant leaks, look for non-condensable, VI. Analyze compressor oil for consistency and debris partials.

VII. Inspect motors, starting mechanisms, electrical connections, wiring, and switch gear.

X. Seasonal chiller startup verify operating parameters identified in the manufacturer specifications, temperatures, pressures, flow rates, power consumption, refrigeration capacity, and efficiency.

2 General Requirements

The contractor shall report to the front office at USDA-ARS-CGAHR, 1515 College Avenue, Manhattan, Kansas, 66502. The contractor shall provide proof of citizenship, or a valid state driver’s license and wear temporary visitor badge while on the premises.

Factory certified authorized service technician will perform preventive maintenance, repairs services, warranty's inspections for the 19XR carrier chillers the technician will also assist with seasonal startups.

The contractor shall be able to respond with a technician onsite within four hours of emergency notification.

2.1 Non-Personal Services

The Government shall neither supervise contractor employees nor control the method by which the contractor performs the required tasks. Under no circumstances shall the Government assign tasks to, or prepare work schedules for, individual contractor employees. It shall be the responsibility of the contractor to manage its employees and to guard against any actions that are of the nature of personal services or give the perception of personal services. If the contractor believes that any actions constitute, or are perceived to constitute personal services, it shall be the contractor's responsibility to notify the Procuring Contracting Officer (PCO) immediately.

2.2 Business Relations

The contractor shall successfully integrate and coordinate all activity needed to execute the requirement. The contractor shall manage the timeliness, completeness, and quality of problem identification. The contractor shall provide corrective action plans, proposal submittals, timely identification of issues, and effective management of subcontractors. The contractor shall seek to ensure customer satisfaction and professional and ethical behavior of all contractor personnel.

2.3 Contract Administration and Management

Mask requirements are required only if the COVID exposure level for our local county area becomes high.

2.3.1 Contract Management

The contractor shall establish clear organizational lines of authority and responsibility to ensure effective management of the resources assigned to the requirement. The contractor must maintain continuity between the support operations at USDA-ARS-CGAHR, 1515 College Avenue, Manhattan Kansas 66502, and the contractor's corporate offices.

2.3.2 Contract Administration

The contractor shall establish processes and assign appropriate resources to effectively administer the requirement. The contractor shall respond to Government requests for contractual actions in a timely fashion. The contractor shall have a single point of contact between the Government and Contractor personnel assigned to support contracts or task orders. The contractor shall assign work effort and maintaining proper and accurate time keeping records of personnel assigned to work on the requirement.

2.3.3 Personnel Administration

The contractor shall provide the following management and support as required. The contractor shall provide for employees during designated Government non-workdays or other periods where Government offices are closed due to weather or federal holidays. The contractor shall maintain the currency of their employees by providing initial and refresher training as required to meet the PWS requirements. The contractor shall make necessary travel arrangements for employees. The contractor shall provide necessary infrastructure to support contract tasks. The normal work hours are 0730 to 400 Monday through Friday.

The contractor shall provide administrative support to employees in a timely fashion, payroll and time keeping, leave processing and respond to emergency needs of their personnel.

2.4 Subcontract Management

Section 6

Performance Requirement Summary (PRS) Statements Standards/AQLs Incentive/Remedy

3.1 Brush tubes clean

for condensate heat transfer tubes.

a) Brush tubes clear of debris AQL: proper operations Visual / repair

b) Clear of debris AQL: take pictures before and after

3.1.1 The Contractor shall

valve off condenser open vents drain condensate tubes for chiller.

a) close valves, open vents and drain tubes AQL: proper operations Visual / repair

3.1.2 Chemically wash

condensate heat transfer tubes

a) Clean loosen all dirt and corrosion before brushing AQL: visually clean after brushing

3.1.3 The Contractor shall

remove condenser head brush tubes clean for chiller.

a) Remove condenser bulkhead

3.1.4 The Contractor shall

reinstall condenser head for chiller.

a) all bolts are installed AQL: no leakage present proper operations Visual / repair

3.1.5 The Contractor shall

close drain and open valve configuration fill and purge air for chiller.

a) refill condenser water AQL: condenser water filled to the correct level

3.1.6 Perform Eddy

current test biannually on condensate tubes

a) Early identification of problems Clear of debris AQL: manufacture specifications good continuity recommended voltage drops and recommended amps

3.2 Brush tubes clean

for evaporator heat transfer tubes.

a) Brush tubes clear of debris AQL: proper operations Visual / repair

b) Clear of debris

3.2.1 The Contractor shall a) close valves, open vents and

valve off evaporator open vents drain chiller tubes for chiller.

drain tubes

3.2.2 Chemically wash

evaporator heat transfer tubes

a) chemically treated water by manufactures specifications AQL: recommended manufacture specifications

3.2.3 The Contractor shall

remove evaporator head brush tubes clean for chiller.

a) Remove condenser bulkhead

3.2.4 The Contractor shall

reinstall evaporator head for chiller.

a) all bolts are installed

3.2.5 The Contractor shall

close drain and open valve configuration fill and purge air for chiller.

a) refill condenser water AQL: condenser water filled to the correct level

3.2.6 Perform eddy

current test to evaporator heat transfer tubes

a) Identifies and corrects deficiencies AQL: good continuity recommended voltage drops and recommended amps

3.3 Operating inspection

safety evaluation for condenser water loops.

a) Compliant with applicable standards AQL: meets all safety technical

3.3.1 The Contractor shall

monitor check all gages for normal operation and system operation for Water cooled HVAC Chillers.

a) Compliant with applicable standards

3.3.2 The Contractor shall

ensure All Safeties and indicator lights shall be tested for Water cooled HVAC Chillers.

a) Meets all operational safety safeguards

3.3.3 The Contractor shall

analyze any alarm history for Water cooled HVAC Chillers.

a) Identifies and corrects deficiencies AQL: chiller operating to manufactures specifications

3.3.4 The Contractor shall

diagnose potential problems after reviewing recorded log readings and making evaluations for Water cooled Chillers.

a) Identifies and corrects deficiencies

3.3.5 The Contractor shall

confirm operational requirements for pumps and cooling towers.

a) All safety checks will be thorough and complete IAW manufactures specifications

3.3.6 The Contractor shall

perform vibration analysis pre-determine critical failures for water cooled Chiller components.

a) Manufacturer recommendations AQL: manufacture recommendations

3.4 Tune to optimal

operating standards for chiller startup and tunning for HVAC Chillers.

a) Compliant with applicable standards

3.4.1 The Contractor shall

analyze the water flow for condenser and evaporator calculating correct water flow rate for Water cooled Chillers.

a) Water flow rate calculated by inlet and out water flow and water temperature deference's

3.4.2 The Contractor shall

verify normal chiller operations Check condenser head pressure for Water cooled Chillers.

a) Manufacturer recommendations

3.4.3 Check Evaporator a) Meets all operational safety

water temperature record the temperature differential of the chilled water inlet and outlet temperatures safeguards

3.4.4 The Contractor shall

calibrate if necessary for normal operation check all controls operate properly for Water cooled Chillers.

a) Identify trends and areas of improvement manufactures operational recommendations AQL: manufacture operational

3.4.5 The Contractor shall

make any necessary equipment adjustment alien and tighten fixers and fasteners as necessary for Water cooled Chillers.

a) Compliant with applicable standards AQL: manufacture specifications

3.5 Assess the

serviceable condition for water cooled Chiller components.

a) All safety checks will be thorough and complete IAW manufactures specifications

3.5.1 The Contractor shall

recommend resolutions or solutions to potential issues of overall heat transfer and best chiller efficiency test for biological growths for condensing open water loops.

a) chemically treated water by

AQL: No biological growths

3.5.2 The Contractor shall

test condenser water temperature measure condenser heat transfer rate for chiller condenser.

a) Change according to manufactures recommendation AQL: manufacture recommendations

3.6 Analyze assess the

condition of chiller compressor.

a) Manufacturer recommendations AQL: meets manufacture operational specifications

3.6.1 The Contractor shall

ensure optimal performance by checking for possible refrigerant leaks at chiller compressor.

a) recommend refrigerant pressures by type of refrigerant and ambient temperature AQL: full refrigerant charge with no non-condensables

3.6.1.1 The Contractor shall

Inspect refrigerant sight glass for non-condensable' s purge non-condensable' s (air and moisture) from centrifugal compressor.

a) recommend refrigerant pressures by type of refrigerant and ambient temperature AQL: full refrigerant charge with no non-condensables

3.6.2 The Contractor shall

change oil and filter annually by recommended manufacture specifications for centrifugal compressor.

a) change oil at manufactures recommendation AQL: proper clean oil at manufactures recommendations

3.6.3 The Contractor shall

Check proper oil level in sight glass by manufactures specifications for chiller compressor.

a) check for proper oil level compressor oil level sight glass AQL: Manufactures recommended oil level

3.6.4 The Contractor shall

take oil sample from compressor record lab result analysis for centrifugal compressor.

a) analyze oil sample from centrifugal compressor AQL: recommended manufacture