12805B23Q0831 Specifications.pdf

UNITED STATES DEPARTMENT of AGRICULTURE

AGRICULTURE RESEARCH SERVICE

CONSERVATION and RESEARCH LABORATORY 2300 Experiment Station Road

Bushland, Texas, 79012

08/18/2023

Specifications:

52.211-6 Brand Name or Equal (AUG 1999)

General Information:

Background and Purpose: The USDA, Agricultural Research Service (USDA-ARS) requires the critical need for supply purchase to replace existing equipment-an existing non-functioning condensing unit, non-functioning refrigerant valve and outdated refrigerant fluid with a new condensing unit, refrigerant valve, and EPA compliant refrigerant fluid for the satisfactory operation of the Environmental Growth Chamber (EGC). The existing equipment is located on the roof top of the building that houses the existing Environmental Growth Chamber. This retrofit of the new equipment on the Environmental Growth Chamber is a necessity to maintain accurate ambient internal temperature ranging from 10 to 60 °C with an accuracy of 0.5 °C to conduct required research studies and calibration of thermal sensors developed and deployed at the Conservation and Production Research Laboratory (CPRL), 2300 Experiment Station Road, Bushland, Texas 79012.

1. Definitions:

1. USDA: Unites States Department of Agriculture

2. ARS: Agricultural Research Service

3. CPRL: Conservation and Production Research Laboratory

4. SOW: Statement of Work

5. SWMRU: Soil and Water Management Research Unit

6. EGC: Environmental Growth Chamber

7. R: Refrigerant

8. EPA: Environmental Protection Agency

9. CPR: Crankcase Pressure Regulator

10. C: Celsius

CONTRACTOR REQUIREMENTS:

2. Technical Requirements/Tasks:

Supply new condensing unit and replace the existing condensing unit. The retro fitting, pressure and operation testing of the new condensing unit, refrigerant valve package, and refrigerant on the existing Environmental Growth Chamber. Condensing unit and all parts must be compatible with existing Environmental Growth Chambers EGC Cold Room.

Specific Product Specification in terms of detection limits and operating concentrations:

Remove existing EGC condensing unit, refrigerant valve, refrigerant fluid and replace with a new condensing unit, new refrigerant valve package, compliant refrigeration fluid, while utilizing existing parts to retrofit the installation of the new equipment. Pressure test the retrofit equipment and demonstrate operation of the EGC temperature chamber from 10 to 60 °C.

UNITED STATES DEPARTMENT of AGRICULTURE

AGRICULTURE RESEARCH SERVICE

CONSERVATION and RESEARCH LABORATORY 2300 Experiment Station Road

Bushland, Texas, 79012

System Operation Specifications:

Total for the retrofit equipment of the existing EGC Cold room

1) Demolition of existing equipment to include:

a. Existing condensing unit:

i. Reclaim all existing R134A refrigerant per EPA regulations.

ii. Disposal of R134A per EPA regulations

iii. Cut out and discard the existing refrigeration valve package hanging overhead,

iv. Cut out and discard existing remote air-cooled condensing unit.

b. We have assumed the existing piping is in good condition and is to remain and be reused.

2) Installation of new equipment to include:

a. New outdoor air-cooled condensing unit in same location as existing unit

i. This proposal does NOT include any housekeeping pad or structure for condensing unit to sit on. We have assumed the reuse of existing pad/rack.

b. New valve package containing new Siemens hot gas valve, CPR valve, filter/drier, manual valves and shutdown solenoids

c. Remote piping from room to exterior unit is to be reused.

i. All piping will be pressure tested to confirm system is tight.

ii. All piping will be flushed according to current standards.

iii. All piping to be reused with new system.

iv. This proposal does NOT include any new wall/floor or roof penetrations.

d. New system to be pressure tested after all installation work is completed.

e. System will then be evacuated and charged with R404A refrigerant.

f. Pipe insulation to be replaced as needed and if accessible.

g. New system to provide the same operational temp range of 10C-60C) lights on/off.

h. Includes all freight and onsite installation utilizing with EGC factory trained technicians.

3) Complete installation, startup

4) Two-year warranty on parts/labor on all new equipment

3. Deliverable / Schedule:

Key Deliverables

Item No. Deliverable Objective Due

1 Removal of existing condensing unit, refrigerant valve, and refrigerant fluid from existing EGC and retrofit new condensing unit, refrigerant valve and refrigerant fluid.

Per Above Technical Requirements / Task

1 November 2023