Attachment 3 Specifications Document 12805B24Q0276.pdf

NBAF NBAF DESIGN PARTNERSHIP

LGL07C00004 800620.001

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SECTION 13 21 27 – COLD ROOMS

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes cold rooms, designed and engineered to meet the specified operating criteria. Components include the following:

1. Prefabricated insulated metal panel construction, furnished and installed as a complete self-contained unit, consisting of wall, ceiling, and floor panels, doors, plenums, and closure panels.

2. Factory assembled and tested refrigeration system, including condenser, evaporator, air handler, controls and instrumentation.

3. Refrigeration piping, electrical lighting fixtures, power outlets, power, and control wiring electrical power wiring, control wiring and connections which are an integral part of the rooms. [PDC 2-210]

4. Start-up and field-testing of the rooms as described in Field Quality Control Testing.

B. Related Sections:

1. Division 13 Section “Cold Rooms”.

2. Divisions 23 and 26 for connection of cold rooms to building plumbing, mechanical, and electrical services.

C. Room Schedule: Refer to Schedule at the end of Part 3 of this Section.

1.2 SYSTEM PERFORMANCE REQUIREMENTS

A. General: Engineer, design, fabricate and install cold rooms to comply with the following.

1. Set Point Temperature: 4 deg C.

2. Temperature Gradient: 1.0 deg C.

3. Temperature Uniformity: Plus or minus 0.5 deg C.

B. Redundant Refrigeration System: Provide redundant refrigeration system to ensure uninterrupted operation of cold rooms in the event of failure of a component of the refrigeration system, the power supply wiring, or other unforeseen equipment failure.

Provide system that works in conjunction with primary system. The two systems shall rotate operation by means of adjustable cycle timer to ensure that both systems are given equal operating time and to verify that both systems are functional. On failure of primary system, passive system will automatically come on line to maintain room temperature and humidity.

1.3 ACTION SUBMITTALS

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A. Technical Data: Submit manufacturer's technical data for cold room components and systems including but not limited to the following:

1. Written description of proposed system describing operating characteristics.

2. Insulated metal panels.

3. Lighting.

4. Fans and coils showing dimensions and required clearances, weights, capacities, ratings, and fan performance curves with operating point indicated.

5. Motor electrical characteristics.

6. Installation and maintenance instructions.

7. Capacity of refrigeration system.

B. Shop Drawings: Submit Shop Drawings showing cold rooms and equipment dimensions, door locations, lighting, control panels, weight loadings, required clearances, field connection details, and methods of support. Draw to a scale of one half-inch to one foot. Show all required clearances for servicing.

1.4 INFORMATIONAL SUBMITTALS

A. Certification: Manufacturer shall certify in writing that cold rooms comply with specified requirements. Submit test data and report showing compliance with performance requirements. Submit commissioning plan for testing systems in accordance with the procedures listed in Part 3 of this Section. Submit for approval prior to commencement.

1.5 CLOSEOUT SUBMITTALS

A. Operation and Maintenance Manuals: Operating and maintenance manuals containing approved shop drawings, equipment literature, cuts, bulletins, performance data, engineering data sheets, testing and certification documents, and written instructions relative to the care and operation of all equipment, controls, and systems. Manuals shall be properly indexed and bound in hard-back three ring binders.

1.6 QUALITY ASSURANCE

A. The work of this section has been identified by the design team as a Level q3 or q4 quality level element. These elements are critical to the success of the project as identified in the Quality Management Plan. Refer to Section 01 40 00 for a complete definition of these levels and the portions of the project affected by these requirements.

1. All submittals identified within this section will be identified as a q3 or q4 element.

2. Deviations from the Contract Documents with q3 or q4 elements will be deemed unacceptable.

B. Manufacturer/Installer Qualifications: Provide cold room system produced by a manufacturer with not less than 10 years successful experience in the fabrication of

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For Official Use Only assemblies of the type and quality required. A minimum of 100 rooms shall have been fabricated and installed within the last 10 years.

1. Manufacturer shall have an established organization and production facilities specializing in the type of equipment specified with experienced engineering department. Manufacturer shall have demonstrated ability to produce specified equipment and complete an installation of this size and type within the required time limits.

C. Testing Agency Qualifications: An independent agency, qualified according to ASTM C 1077 and ASTM E 329 for testing indicated.

D. Product Options: Information on Drawings and in Specifications establishes requirements for cold rooms. Do not revise indicated requirements except with Architect's approval. If revisions are proposed, submit comprehensive list of revisions and explanatory data to Architect for review.

1. The Architect will reject revisions without further review that do not meet the standard of quality established by these specifications.

E. Comply with the latest revision of the codes, specifications, and standards of the following agencies except where more stringent requirements are shown or specified:

1. National Electrical Code (NEC).

2. National Electrical Safety Code.

3. Occupational Safety and Health Administration (OSHA).

4. American National Standards Institute (ANSI).

5. Underwriters Laboratory (UL).

6. National Electrical Manufacturers Association (NEMA).

7. American Society of Mechanical Engineers (ASME).

8. Air Movement and Control Association, Inc. (AMCA).

9. Air-Conditioning and Refrigeration Institute.

10. American Society of Heating, Refrigerating, and Air Conditioning Engineers

(ASHRAE).

11. American Refrigeration Institute (ARI).

1.7 DELIVERY, STORAGE AND HANDLING

A. Do not deliver finished components and assemblies to site until installation spaces are ready to receive rooms.

B. Wrap and crate finished components and assemblies at factory to prevent damage or marring of surfaces during shipping and handling.

C. Store products off ground, under cover, protected from elements and construction operations.

D. Ship insulated metal panels with strippable protective covering. Do not remove covering until cold room installation is complete.

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1.8 FIELD MEASUREMENTS

A. Field Measurements: Check spaces where cold rooms will be installed by accurate field measurements before fabricating panels; show recorded measurements on final Shop Drawings. Coordinate fabrication with construction progress to avoid delaying the work.

1.9 COORDINATION

A. Coordinate installation of cold rooms in sequence with related elements of the Work specified in other sections to ensure that rooms are protected against damage from subsequent construction activity.

1.10 WARRANTY

A. Manufacturer shall provide written warranty that warrants the following:

1. That cold rooms including, but not limited to panels, panel locking assembly, gaskets, entrance door and frame, hardware, control panel, and mechanical and electrical systems, shall be free from defects in materials and workmanship under normal use and service.

2. That cold rooms shall maintain specified temperature and humidity within indicated tolerances and be free from condensate on outside of room.

B. Warranty covers all parts except consumable items (belts, filters, fuses) for the warranty period. It does not cover normal maintenance and re-calibration labor after initial start-up. Furnish a copy of the warranty in advance of the time when the unit is shipped. Period of warranty is as follows:

1. Insulated Metal Panels: Ten years from date of Substantial Completion.

2. Compressor: Five years from date of start-up and commissioning.

C. The warranty shall not apply to equipment subjected to accidents, improper voltage, abuse, or misuse.

1.11 SERVICE CONTRACT

A. Provide proposal for one-year service contract that provides emergency callback service within one (1) hour on a 24-hour, 7-day per week basis during the first year of the warranty. In addition, manufacturer shall provide 8-hour on-site emergency service and 24-hour non-emergency service by factory personnel or a service center authorized by the cold room manufacturer.

1. The manufacturer shall prominently locate the name of installer/service agency to be contacted during warranty period on the equipment

B. Provide yearly cost of continuing service contract beyond initial service contract.

Government may, at its option, continue the service contract beyond the first year.

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PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products of one of the following:

1. Environmental Growth Chambers.

2. Harris Environmental Systems, Inc.

3. Environmental Specialties, Inc.; Division of Bahnson, Inc.

2.2 INSULATED METAL PANEL CONSTRUCTION

A. Foamed-in place polyurethane insulation sandwiched between interior and exterior skins with tongue-and-groove panel edges.

1. Wall and Ceiling Panel Thickness: 4 inches.

2. Panel Width: 12 in. min. width; 48 in. max. width; furnish in 6 in. increments.

a. Install rooms by using the maximum panel size available for the application to limit number of panel joints.

B. Interior and Exterior Wall Skins:

1. Wall Panels: 22 gauge, smooth, Type 304 stainless steel; No. 4 finish.

2. Ceiling Panels:22 gauge, smooth Type 304 stainless steel; No. 4 finish.

C. Wall Panel Reinforcement: Reinforce wall panels with 16 gauge galvanized steel tapping plates permanently foamed within the panels. Refer to Drawings for equipment requiring wall panel reinforcement.

D. Ceilings: Reinforce ceiling to sustain weight of ceiling panels and equipment loads.

Provide reinforcement that does not reduce the insulation value of the panels.

E. Floors: 4 inches thick, similar to wall panel construction; consisting of the following, bonded to form a unit:

1. Bottom Layer: 22 gauge, smooth, Type 304 stainless steel; mill finish.

2. Insulation: Foamed-in-place polyurethane insulation.

3. Top Layer: 22 gauge, smooth, Type 304 stainless steel; No. 4 finish.

4. Load Capacity: 600 psf.; reinforce floor panels with stainless steel plate for floor loads that exceed capacity.

F. Insulation: Foamed-in-place, closed cell, polyurethane insulation complying with the following requirements:

1. R Value: Not less than 28.0.

2. Thermal Conductivity; K-factor: 0.121.

3. Coefficient of Heat Transfer; U-factor: 0.030.

4. In-Place Density: 2.2 pcf.

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5. Compressive Strength at Yield Point: 19 pounds per sq. inch.

6. Flame Spread: 25 or less in accordance with ASTM E 84.

7. Smoke Developed: 450 or less in accordance with ASTM E

84.

G. Panel Edges: Tongue-and-groove locking assemblies foamed-in-place at time of fabrication.

H. Panel Locking Assembly: Provide manufacturer's standard joining mechanism for panel assembly, activated by hex wrench provided by manufacturer. Access ports shall be on interior to allow assembly from the inside and shall be covered by snap steel caps.

I. Panel Gaskets: Continuous flexible vinyl gaskets foamed-in-place on interior and exterior edges of tongue rail, impervious to stains, grease, oil, and mildew.

2.3 HINGED ENTRANCE DOOR PANELS

A. Provide in-fitting flush-design door similar in construction to wall panels. Door location and direction of swing are indicated on Drawings.

1. Door Thickness: 4 inches.

2. Door Size: Shown in Schedule at the end of Part 3 of this Section.

B. Magnetic core thermoplastic gaskets, installed on top edge and both sides of door, shall keep door in a closed position and form a tight seal. Provide flexible, dual-blade wiper gasket at the bottom of the door. Gaskets shall be replaceable and resistant to damage from oil, fats, water and detergent; and NSF approved.

C. Reinforce perimeter of door opening with heavy U-channel steel frame to prevent racking and twisting.

D. Door Frame: Formed stainless steel sheet metal, seams fully welded, with No. 4 finish.

E. Threshold: Formed from stainless steel plate.

F. Hardware: High-pressure die cast zinc with polished chrome finish. Provide extra large ½-inch thick non-conducting tapping plates for attachment of the following hardware items:

1. Hinges: Three spring-loaded, self-closing hinges.

2. Latch: Provide positive door latch with inside safety release mechanism.

3. Closer: Hydraulic, piston driven; adjustable.

4. Finish: Stainless steel, US 32D.

G. Observation Window: 14 by 24 inches; consisting of three panels of safety glass with sealed air spaces. Window shall be removable to allow replacement.

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H. Kickplate: 36 inches high by width of door, stainless steel, on interior and exterior of door and door frame. Provide one of the following as indicated in the Cold Room Schedule in Part 3 of this Section.

1. Stainless steel diamond plate; 1/8-inch thick, No. 4 finish.

2. Stainless steel sheet metal; .060-inch thick, No. 4 finish.

2.4 ACCESSORIES

A. Ceiling: Provide uniform air circulation and distribution system throughout cold room utilizing standard aluminum ceiling grid with foil-faced lay-in ceiling panels, and room perimeter slot diffusers, with return air to conditioning system through ceiling return grilles. Clearance below finish ceiling within room work area shall be unobstructed.

B. Trim Strips: Provide trim strips of same material and finish as panel skin to close openings between insulated room and building partitions.

C. Closure Panels: Provide closure panels of same material and finish as panel skin to close area between insulated room and building ceiling.

D. Cylinder Lock: Cylinder lock and locking cam with non-conductive housing; with keying that matches facility security requirements.

E. One-Part Mildew-Resistant Silicone Sealant: Type S; Grade NS; Class 25; Uses NT, G, A, and, as applicable to nonporous joint substrates indicated, O; formulated with fungicide; intended for sealing interior joints with nonporous substrates and subject to in-service exposure to conditions of high humidity and temperature extremes.

F. Sleeves for Service Piping: Stainless steel or schedule 80 pvc pipe; sealed pipe penetration at exterior and interior skins with silicone sealant. Provide sleeves of sufficient diameter to allow at least 1/8-inch clearance around service line. Seal void between service line and sleeve with silicone sealant. Provide caps to seal pass-through when not in use.

2.5 LIGHTING

A. Lighting: Provide required number of ceiling mounted light fixtures to maintain light intensity of 70 ft- candle average when measured 40 inches above floor; designed to operate at 120 VAC; provide 150 watt gasketed vapor proof fluorescent.

B. Light switch with pilot light shall be located adjacent to door with wiring in rigid conduit concealed inside the door and terminated at surface mounted junction box on interior door frame.

1. Dual 3-Way Switch: Provide 2 switches on each entrance door. Exterior switch has pilot light which illuminates when interior lights are on; interior switch has constantly burning pilot light which locates switch if interior lights are turned off from outside.

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2.6 INSTRUMENT AND CONTROL SYSTEMS

A. Primary Control Center: Provide local control device mounted on wall adjacent to each cold room for monitoring temperatures, alarm and safety controls, and data collection for the cold rooms. Provide electrical connections for control and alarm devices to enable devices to be readily connected to BAS. The local control device shall be provided by the carcass storage cold room vendor. [PDC2-210]

B. Main Temperature Control: Microprocessor based Proportional Integral and Derivative (PID) controller designed to provide continuous monitoring of room conditions versus setpoint, providing output which will modify conditioning system capacity in response to any deviation.

C. With the following features:

1. Resistance Temperature Detector (RTD): 100 ohm platinum sensor for rapid response to temperature fluctuation, open tip. Sensitivity shall be greater than or equal to ± 0.1 deg C.

2. Controller Range: Programmed to cover required range of room as scheduled.

3. Accuracy: ± 0.5 percent of span typical, ± 1 digit for display at 25 deg C.

4. Ambient Temperature Error: 0.01 percent of span per degree C deviation from

25 deg C.

5. Resolution: 1 degree per unit.

6. Calibration Drift: Self-compensating for ambient temperature. Calibration values stored in memory. Field calibration not required.

7. Noise Rejection: Normal mode, 60 dB minimum at 60 Hz; common mode, 90 dB minimum.

8. Controller: Provided by the cold room vendor .[PDC 2-210]

D. Alarm and Safety Control System: Equip room with electronic high/low alarm and safety control. With the following features:

1. PTC sensor electronic temperature control with dual setpoints and exposed setpoints in control panel, providing independent high and low alarm outputs.

2. Alarm circuit board including control relays, solid state circuiting, an alarm buzzer, input/output termination and remote alarm dry contact relay.

3. Provide two extra dry contacts (one normally closed, one normally open) for high/ low temperature limit controls for connection to remote alarm monitoring system. Connection by others.

4. Control panel mounted components including high/low setpoints, high-alarm lights, "silence" switch which silences alarm, and control alarm override switch used to restart system.

5. Alarm setpoints shall be visible through LED readout. No dials, set screws or switches shall be required.

6. Provide analog outputs to the BAS to allow for logging of temperature data from the control panel. [PDC 2-210]

E. Alarm System Operation:

1. Alarm circuit is an "always alive" circuit which cannot be shut off.

2. Upon deviation in room temperature uniformity or power failure to room, remote alarm relay will close, sending a remote signal.

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3. When room rises above high temperature setpoint, "high" pilot lights, buzzer sounds, and heat-producing devices shut down including lights, fans, and door heat, if provided. Remote alarm relay shifts giving a normal open or closed signal. System remains in this state until temperature drops, at which time system automatically resets.

4. Alarm can be silenced for an adjustable minimum and maximum amount of time by pushing "silence" switch. When alarm condition clears it automatically resets ready for next alarm condition. Silencing alarm does not shut off remote alarm.

At conclusion of timed interval, buzzer will sound again unless room is again within design parameters.

5. When room drops below setpoint, "low" pilot lights, buzzer sounds, and power to all cold-producing components including refrigeration solenoids is removed.

Remote alarm relay shifts giving a normal open or closed signal. System operates as specified herein for override, silencing, etc.

F. Control Panel: Mounted on wall adjacent to room. With the following features:

[PDC2-210]

1. Key-locked, clear polycarbonate cover, with neoprene gaskets to seal against water penetration. Provides view of controls and protection of controls. . [PDC 2-210] Mount complete schematic of control system on inside face of panel.

a. Size cover to enclose control panel and personal access control device.

2. Control Panel Enclosure: Provide NEMA 4X stainless steel electrical enclosure for watertightness and corrosion resistance. [PDC2-210]

3. Label control functions with descriptive nameplates or lenses on control panel face.

4. In addition to control instruments, panel shall contain circuit fusing, timers, switches, pilot lights, main and safety controls, alarms, and other devices required for system operation

5. Sensors: Wall-mounted approximately 48 inches A.F.F., with extra 5 ft. of sensor wire for mobility for calibration.

G. Personnel Emergency Alarm: Provide each room with electric personnel emergency alarm consisting of actuator located inside room and audible and visible alarms on room exterior; with dry contacts for connection to BAS. Actuator shall be equipped with red button marked “Emergency Alarm – Push to Operate”. Mount actuator 12 inches above finished floor adjacent to door jamb. Visible alarm shall be marked

“PERSONNEL EMERGENCY”.

2.7 MECHANICAL SYSTEM

A. Refrigeration System: Integrated system consisting of evaporator and condensing unit designed to operate continuously. Cooling output on demand proportioning basis in relation to the desired temperature control point. System capacity shall be suffi-cient to meet simultaneously:

1. Performance test requirements included in Part 3 of this Section.

2. Additional internal heat gain generated by user equipment to a maximum of 10 watts per sq. ft. gross floor area.

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B. Location of Refrigeration System: As shown on Drawings and as indicated in Cold Room Schedule in Part 3 of this Section.

C. Defrost System: Electric defrost system. Equip timer with fan delay switch. Design system to operate without defrost period when room is operated above 5 deg C to permit continuous operation. Room temperature rise shall not exceed 5 deg C above set point. Defrost period adjustable but not to exceed 15 minutes.

D. Evaporator Unit:

1. Coil: Copper tubing with electrofin coating, aluminum fin design with aluminum housing; minimum 8 fins per inch, minimum four rows deep. Air velocity shall be less than 500 FPM.

2. Evaporators: Designed to uniformly distribute air throughout room space. Fan motors are sealed type and sized to create positive pressure supply plenum.

3. Heating Coil: To operate at conditions above 20 deg C, room shall be equipped with electric heaters integrated into air flow system. Heaters shall be stainless steel sheathed with stainless steel fins and with thermal safeties attached to protect heater.

E. Condensing Unit: Water cooled with semi-hermetic serviceable compressor and spring mounted. Manufactured to match compressors as determined by condensing unit manufacturer. Equip each condensing unit with:

1. High /low pressure control.

2. Vibration eliminating devices on suction and discharge lines.

3. Fusible plug.

4. Liquid line dryer.

5. Moisture indicating sight glass.

6. Suction line filter.

7. Magnetic contactor on three phase units.

8. All other safety mechanical devices required, including low ambient controls and full weather shrouding.

9. Refrigerant: Select refrigerant that will provide optimum operation considering evaporating and condensing temperatures. Provide refrigerant that complies with latest protocol concerning its use based on ozone depletion potential.

F. Refrigeration Piping: ACR type, hard drawn, cleaned and capped Type L copper tubing soldered with silver solder, except hot gas lines which shall be silver or silfos brazed. Install lines to allow for linear expansion of copper after start-up.

1. Suction Lines: Size for velocity of 500-700 FPM on horizontal runs and show slight pitch toward condensing unit. When condensing unit is located below evaporator, and there is no possibility of trapping oil, size vertical runs same as horizontal runs. When condensing unit is located above evaporator, size vertical runs for velocity of 1,000-1,500 FPM and install proper (shallow) "P" traps spaced not over 15 ft. apart on tubing risers.

2. Liquid Lines: Size liquid lines for maximum 2 PSIG pressure drop.

3. Hangers: F & M ring type or Unistrut assemblies with appropriate tubing clamps to support liquid, suction, and discharge lines individually. Space hangers or clamps 8 ft. o.c. maximum.

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4. Condensate Drain Piping: 7/8-inch O.D., or greater, stainless steel tubing hard piped from evaporators to open floor drain, rigidly supported at walls 3 ft. o.c.

maximum, installed in a manner that leaves 4-inch clearance space between wall and drain; equip with cleanout tee near evaporator. Adequately pitch piping toward floor drain, carry through wall of refrigerated areas properly trapped and discharged within 2 ft. of floor drain. Provide stainless steel escutcheons on both sides of wall penetrations.

5. Refrigerant Testing: Pressurize and leak test system at not less than 100 PSIG.

Clean and dehydrate by maintaining vacuum of 500 microns or lower for 5 hours. Add required charge of refrigerant, and oil if necessary, and test entire system for performance. Mark each system clearly as to refrigerant type used.

2.8 ELECTRICAL EQUIPMENT AND MATERIALS

A. Electrical Requirements: Electrical components shall comply with requirements of UL and NEC. Final power connections are specified in a Division 26 section.

1. Receptacles: Provide GFCI, NEMA 5-20R duplex receptacles with weatherproof covers mounted 45 inches a.f.f. Coordinate number of receptacles with Contracting Officer’s Technical Representative.

2. Foam junction box for each outlet into insulated panels with 1/2” EMT conduit running from junction box to building electrical. Exposed conduit on interior or exterior of room is not acceptable. Conduit and boxes shall be non-metallic.

B. Provide required conduit, wire, boxes, and fittings as follows:

1. Single point of connection for power to controls, door heaters, and lighting.

2. Single point of connection for refrigeration system.

3. Run conduit and wire from door magnetic switches to junction box on top of room.

4. Run conduit and wire from temperature alarms to junction box on top of room.

5. Note: Junction box shall be in an accessible location. If top of room is not accessible, coordinate location with Contractor.

C. Provide sealed fittings where conduit penetrates insulated enclosure.

D. Coordinate wiring and connection point with Division 26.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine existing conditions prior to beginning work and notify Architect and Contracting Officer’s Technical Representative in writing of unsatisfactory conditions.

Commencing installation constitutes acceptance of related work by other trades.

3.2 INSTALLATION

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A. Seal all joints, openings, piping, electrical and ductwork penetrations, in the outside and inside faces of cold rooms. At line of support on other floor construction (outside and inside) seal with a formed cove of sealant or other coved trim member.

B. Install closure panels and strips where installed unit results in a residual space, which is not of sufficient size to be cleaned or maintained. Seal joints, forming a cove of sealant or seal joint using a pre-manufactured trim member.

C. General: Convenient access to equipment requiring regularly scheduled maintenance is essential. Do not install equipment in locations that do not provide easy access to the equipment.

D. Install condensing units and evaporator units as indicated complete with all interconnecting refrigerant piping, conduit and wire as required. Seal where items penetrate insulated enclosure.

1. Field rout piping and conduit between condensing and evaporator units.

Coordinate work with other trades to avoid interferences.

2. Where piping and conduit pass through floor slabs, core drill slab and install pipe sleeves extending 4 inches above slab. Provide firestopping at penetrations to achieve specified fire rating.

a. Coordinate location of penetrations with CMc.

3. After Contracting Officer’s Technical Representative’s acceptance of testing, apply silicone sealant to inside of conduits that penetrate temperature controlled rooms room enclosure.

E. Pipe Insulation: Apply in accordance with requirements of Division 22.

F. Electrical Installation: Install electrical work in accordance with requirements of Division 26.

3.3 FIELD TESTING

A. Testing: Government will engage independent testing agency to perform field tests and prepare written reports.

1. Provide written notification to CMc and Architect fourteen days in advance of the testing date.

B. Conduct testing to certify compliance with requirements listed in Part 1 of this Section. Perform testing in accordance with the following:

1. Temperature Control: Temperature variation shall fall within range of ±0.5 deg C, read at sensing RTD.

2. Temperature Uniformity: Temperature variation shall fall within range of ± 0.5 deg C as measured on horizontal plane 40 inches above floor and within 12 inches of walls throughout room. Measure uniformity using multipoint strip chart recorder utilizing minimum of twelve (12) thermocouples during a

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For Official Use Only continuous 24-hour test period. Gradient from floor to ceiling not to exceed 1 deg C.

a. Measure at not less than 8 locations within room.

3. Room Recover: Room shall recover preset operating temperature within five

(5) minutes after door has been fully opened to 75 deg F ambient for a period of one full minute.

4. Test Conditions: Conduct testing under the following conditions:

a. No Load: Conduct tests with room empty for 24 hours and check temperature/ humidity stability and tolerances as specified.

b. Simulated Load: Conduct tests with room filled with items and equipment selected by Owner.

C. Power Failure Test: Shut off power to the room, open the door, and allow room temperature to reach ambient. Shut the door, turn the power back on, and verify if the refrigeration/ dehumidification system turns on by itself, without operator intervention, and returns the room to the design temperature.

D. Humidity: From ambient, room shall attain lowest condition and stabilize within eight hours. The humidity test shall be conducted utilizing recording type hygrometer sensitive to 2 percent differential in RH. Test shall be a minimum of 24 hours.

E. Testing Refrigerant Piping:

1. Evacuate the system (both sides of expansion valve) to 26" Hg. vacuum. Use appropriate pressure gage. Check to assure that entire system is evacuated.

2. Reclaim holding charge of refrigerant used for shipping, if applicable.

a. After 26" Hg. vacuum is obtained, isolate system from vacuum source.

3. Hold system at 26" Hg. vacuum for 20 minutes; a major leak will result in loss of vacuum.

4. Tap brazed joints with a rubber mallet, with sufficient force to disclose leaks that might start with expansion, contraction or vibration.

5. If system holds 26" Hg. vacuum, disconnect vacuum source. Bleed in a small amount of freon R-404a gas, preventing liquid freon from entering the system.

Turn suction shut-off valve to mid-position and open charge valve. Admit freon R-404a gas to 10 psig.

6. Disconnect freon supply and charge system with dry nitrogen gas to 250 psig.

Use soap test to determine leak location.

7. For major leak repair, evacuate entire system and repair. After repair, repeat steps 1 through 7.

8. After major leak repairs, check refrigerant system with a halide leak detector.

9. Do not repair leaks under pressure. Repair brazed joints using new material.

10. After system is determined to be leak-free, evacuate the system to 29" hg.

vacuum. Maintain this pressure for 12 hours, continuously, to remove moisture from the system.

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a. After completion of above step, back seat suction shut-off valve, close vacuum source valves and disconnect vacuum source. System is ready to charge.

F. Test Report: Include the following:

1. Date and time of test start.

2. Signature and designation of individual conducting test.

3. Control point setting.

4. Date and time of test start.

5. Chart speed.

6. Point where temperature and stabilization are achieved.

7. Point where door is opened.

8. Signature and designation of individual conducting test.

9. Manufacturer and serial number of data logger.

10. Date of certification, name of testing laboratory and certificate number.

3.4 ADJUSTING AND CLEANING

A. Ensure that cold rooms are functioning properly and maintaining specified temperature. Make field adjustments prior to acceptance.

B. Thoroughly clean the inside and outside of rooms using sanitizing cleaning products.

C. Remove and dispose of packaging materials and protective coverings.

3.5 TRAINING

A. Provide 8-hours of training by factory-trained representative to instruct Government personnel on control system, review contents of the operation manual, and provide general instruction on the proper use and care of the chambers. Instruction shall be provided by factory trained technicians only; sub-contractors will not be accepted.

B. The manufacturer shall have available periodic factory-instructed service seminars on cold room mechanical and controls equipment to maintain maintenance staff's familiarity and competence with all operation and maintenance functions to allow self-directed maintenance.

3.6 PROTECTION

A. Protect cold rooms after installation as required to prohibit damage. Replace or repair damaged work prior to acceptance.

3.7 COLD ROOM SCHEDULE

A. 1-EC-14: BSL-2, Room B2.111

1. Temperature Requirements: 4 deg C.

2. Condenser Location: On top of unit within ceiling plenum.

Jonathan.Lagerquist Line

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3. Door Dimensions: 40 by 78 inches.

4. Power: One 208 V, 3 PH, 4-wire, 40A [PDC2-210] circuit to room control panel.

B. 1-EC-14: BSL-3E, Room B3.195.1

1. Temperature Requirements: 4 deg C.

2. Door Dimensions: 40 by 78 inches.

3. Redundancy: Redundant refrigeration system; 2 evaporators within unit and 2 remotely located condensers.

[PDC 2-210]

4. Power: One 208 V, 3 PH, 4-wire, 40A circuit to room control panel [PDC 2-210]

C. 1-EC-14: BSL-3E, Room B3.150

1. Temperature Requirements: 4 deg C.

2. Door Dimensions: 40 by 78 inches.

3. Redundancy: Redundant refrigeration system; 2 evaporators within unit and 2 remotely located condensers.

[PDC 2-210]

4. Power: One 208 V, 3 PH, 4-wire, 40A circuit to room control panel [PDC2-210]

D. 1-EC-14: BSL-3E, Room B3.123.4

1. Temperature Requirements: 4 deg C.

2. Door Dimensions: 36 by 78 inches.

3. Redundancy: Redundant refrigeration system; 2 evaporators within unit and 2 remotely located condensers.

[PDC 2-210]

4. Power: One 208 V, 3 PH, 4-wire, 40A circuit to room control panel. [PDC2-210]

E. 1-EC-14: Room G.038

1. Temperature Requirements: 4 deg C.

2. Door Dimensions: 48 by 78 inches.

3. Power: One 208 V, 3 PH, 4-wire, 40A [PDC 2-210] circuit to room control panel.

4. Redundancy: Redundant refrigeration system; 2 evaporators within unit and 2 remotely located condensers.

[PDC 2-210]

F. 1-EC-14: Room G.039

1. Temperature Requirements: 4 deg C.

2. Door Dimensions: 48 by 78 inches.

3. Power: One 208 V, 3 PH, 4-wire, 40A [PDC 2-210] circuit to room control panel.

4. Redundancy: Redundant refrigeration system; 2 evaporators within unit and 2 remotely located condensers.

[PDC 2-210]

G. 1-EC-14: Room IN.102

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Jonathan.Lagerquist Line

Jonathan.Lagerquist Line

Jonathan.Lagerquist Line

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1. Temperature Requirements: 4 deg C.

2. Door Dimensions: 72 by 78 inches.

3. Power: One 208 V, 3 PH, 4-wire, 40A [PDC 2-210] circuit to room control panel.

4. Redundancy: Redundant refrigeration system; 2 evaporators within unit and 2 remotely located condensers.

[PDC 2-210]

END OF SECTION

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