DaimlerChryslerConstruction Standards

12/17/04

SECTION 15635 - REFRIGERANT MONITORING AND SAFETYEQUIPMENT

PART 1 - GENERAL

1.1SUMMARY

  1. This Section includes refrigerant monitors, alarms, and breathing apparatus.
  2. The refrigerants that will be used on this Project are not known. R-404a is presently specified for the compressed air dryer, but may be replaced by R-407a. R-134a is presently specified for the chillers, but may be replaced by a different non-ozone depleting refrigerant. Furnish equipment based on actual refrigerant selected by the Owner for compressed air dryer and chillers.

1.2DEFINITIONS

  1. CMOS: Ceramic metal-oxide semiconductor.
  2. HFC: Hydrofluorocarbon.
  3. HCFC: Hydrochlorofluorocarbon.
  4. IR: Infrared.
  5. SCBA: Self-contained breathing apparatus.

1.3SUBMITTALS

  1. Product Data: For SCBA; include mounting details and service requirements and compliance with authorized Federal agency.
  2. Shop Drawings: For each type refrigerant monitor; include refrigerant ppm range, temperature range, alarm outputs, output signals, readout range, furnished specialities, installation requirements, and power consumption.
  3. Wiring Diagrams: Power, signal, and control wiring.
  4. Operation and maintenance data.

1.4QUALITY ASSURANCE

  1. Refrigerant Monitor System:
  2. Comply with ASHRAE15.
  3. Be tested, approved and certified by UL to the standards of UL 2075, including performance testing, and shall be listed and labeled accordingly.
  4. SCBA: Tested and certified by the National Institute for Occupational Safety and Health and the Mine Safety and Health Administration according to 42CFR84, SubpartH.

PART 2 - PRODUCTS

2.1MANUFACTURERS

  1. In other Part2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:
  2. Manufacturers: Subject to compliance with requirements, provide products by the manufacturers specified.

2.2FUNCTIONAL DESCRIPTION OF REFRIGERANT MONITORING SYSTEM

  1. On leak detection by refrigerant sensor(s), the system shall perform the following:
  2. Activate machinery room ventilation.
  3. Activate audio and visual alarm inside and outside machinery room.
  4. Provide a visual alarm at each exterior door.
  5. Notify Building Automation System of alarm condition.

2.3REFRIGERANT MONITOR

  1. Basis-of-Design Product: The design is based on Mine Safety Appliance Company (MSA), Chillguard Model RT. Provide either the named product or a comparable product by one of the following.
  2. Foxboro Company (The).
  3. Mine Safety Appliance Company (MSA).
  4. General Analysis Corp.
  5. Description: Photoacoustic IR sensor shall continuously measure and display the specific gas concentration and shall be capable of indicating, alarming, and shutting down equipment, and automatically activating building ventilation system.
  6. Performance Requirements:
  7. Refrigerant to be Monitored: R-404a and R-134a.
  8. Refrigerant Concentration: 0 to 1000 ppm.
  9. Accuracy: 0 to 100 ppm; 1 ppm and from 100 to 1000 ppm; plus or minus 10 percent of reading.
  10. Linearity: 0 to 100 ppm; linear and from 100 to 1000 ppm; plus or minus 2 percent of full scale.
  11. Sensitivity: 1 ppm.
  12. Stability: The 30 day zero or span drift must be less than 1 percent F.S. without the aid of automatic or manual recalibration. The system shall not employ any type of auto zero techniques in order to maintain analyzer stability. Use of fresh air source of scrubber as a zero reference is not acceptable.
  13. Operating Temperature: 0 to 50 degC.
  14. Relatively Humidity: 20 to 95 percent, noncondensing over the operating temperature range.
  15. Operating Requirements:
  16. Power Input: 120-V ac; 60 Hz.
  17. Alarm Set Point Levels: Provide three separate alarm set point levels. The set points shall be independently adjustable for any value for a given range. The set points shall provide drive signals to user interface relays. Alarm set points shall have the capability of providing the user a selection of latching or non-latching.
  18. Relay Outputs: Alarm set point drive signals shall activate user relays as follows:
  19. Number of Relays: As a minimum, 1 relay for each alarm set point.
  20. Contact Rating: Form C, single pole, double throw. Dry contacts shall be rated for 8 amps resistive at 120 VAC.
  21. Contact Selection: The contacts shall be capable of being selected normally energized or non-energized, latching or non-latching.
  22. Alarm Set Points: Displayed on front of monitor.
  23. Audible Output: Sonic alert at 85 dB at 60 inches.
  24. Analog Output: 0- to 10-Vdc or 4- to 20-mA current sourcing.
  25. Serial Output Type: RS485.
  26. Sensor Configuration: Photoacoustic IR sensor having 4 sensing channels. One sensor per sample line or equivalent filtering by the electronics using a single IR sensor to measure the two different refrigerant types.
  27. Display: 2 line by 20-character, alphanumeric, vacuum-fluorescent display; indicating lights for each alarm set point; standard alarm; acknowledge switch and test switch mounted on front panel; gas concentration, diagnostics, set-up, calibration menu, alarm status LEDs and service fault LEDs. Display alarm indications on the front display panel.
  28. Enclosure: NEMA4X.
  29. Alarm Output: Indicating light flashes and horn sounds.
  30. Unit-mounting device with single-light beacon and horn; factory mounted and wired.
  31. Remote units for mounting outside machinery room and having light beacon with single light at each building entry door.
  32. Field-adjustable alarm set points.
  33. Calibration: Factory calibrated system that has a menu driven method of checking both zero and span calibration. Adjustments shall be made through front panel keypad.
  34. Malfunction Indication: The readout display shall display full diagnostics when fault exists without use of codes.
  35. Front Panel Controls: Functions specified shall be accomplished using a keypad readily accessible on the front panel. No tool or adapters shall be used for:
  36. Display of alarm set point level or readout display.
  37. Resetting any alarm point set.
  38. Zero and span calibration adjustments.
  39. Sample Gas Filter: There shall be an internal sample gas filter. Filter shall be easily serviced or replaced.
  40. Sequencer Programming Limits:
  41. System parameters shall be within the following:
  42. Point Dwell Time: 30 seconds.
  43. Alarm Levels: 3 to 1000 part per million in one part per million increments.
  44. Sample Tubing Connection: On the bottom of the enclosure provide fittings suitable for the connection of 1/4 inch O.D. tubing for the purpose of connection, sample lines, calibration gases and exhaust.
  45. Alarm: For each sample location provide 3 alarm set point levels. Any alarm set point shall be capable of activating 1 relay (SPDT, 8 amp at 120 VAC, resistive).
  46. Indicating Lights: All indications related to the multipoint sequencer shall appear on the front panel display.
  47. Sample Handling:
  48. Sample Line Compatibility: System shall be capable of drawing a sample through 1/8 inch I.D. tubing for a distance of 150 feet.
  49. Sequencer Operation: A sample shall be drawn from the next line in sequence regardless of which location is being analyzed.
  50. Sample Conditioning: System shall provide adequate filtration of the sample suitable to protect the analyzer.
  51. Exhaust: On the bottom of the enclosure provide fittings for the purpose of attaching exhaust lines to the sample and bypass flows.
  52. Maximum System Maintenance Requirements: System shall require no periodic maintenance other than periodic checking. Periodic checking or adjustments of the unit shall be capable of being accomplished by one person at the unit location.
  53. Manufacturer Capability Requirements: As a minimum, the refrigerant monitor equipment manufacturer shall be capable of the following:
  54. Supply all equipment used to check or calibrate the unit.
  55. Providing on site service with factory trained personnel.
  56. Providing start-up assistance and training for the Owner.

2.4SCBA

  1. Basis-of-Design Product: The design is based on Mine Safety Appliance Company (MSA), Airhawk MMR Air Mask. Provide either the named product or a comparable product by one of the following.
  2. AFC International, Inc.
  3. Clarey's Safety Equipment, Inc.
  4. MSA, Instrument Division.
  5. Description: Open-circuit, pressure-demand, compressed-air SCBA includes completely assembled, portable, self-contained devices designed for hazardous breathing environment application.
  6. Face Piece:
  7. Face piece shall be available in 3 sizes in both “Hycar” rubber or silicone.
  8. Lens shall be field-replaceable of a non-shatter type and fit all 3 sizes of the face piece.
  9. Face piece shall have an inhalation check valve to prevent exhaled air from entering and contaminating the mask mounted regulator.
  10. Harness shall be rubber or a flame and heat-resistant Kevlar assembly featuring a five-point, adjustable suspension.
  11. Face piece shall have a speaking diaphragm with aluminum-coated membrane suitably protected, and located centrally to the face piece for optimal voice projection.
  12. Two sizes of removable nosecups. The nosecup shall contain a voice collector system, which enhances unamplified speech transmission.
  13. Harness and Carrier Assembly: Assembly shall be readily adjustable for various wearer sizes and shall include the following components:
  14. Adjustable double-pull nylon or Kevlar waist belt.
  15. Plastic waist buckle assembly.
  16. The friction buckles of the shoulder straps shall be constructed of flame and heat resistant plastics.
  17. Shoulder pads that can be installed, by the wearer, without disconnecting any of the pneumatic hoses.
  18. Cylinder:
  19. Construct of deep-drawn, seamless aluminum liner that is fully wound over the entire surface, except for the thick neck area, with high-strength carbon fiber filaments impregnated with epoxy resin.
  20. Have a minimum 2-inch wide luminescent band to enhance visibility of the wearer.
  21. Contain a closing valve, which shall incorporate a pressure gage to indicate the pressure in the cylinder at all times. The pressure gauged face shall be luminescent. The hand wheel shall be at a 90 degree angle from the longitudinal plane of the cylinder.
  22. Be available in 2 operating pressures; 2216 and 4500 psi.
  23. Cylinders having 2216 psig operating pressure shall be rated for 30 minutes. Cylinders having 4500 psig operating pressure shall be available in 30, 45 and 60 minute durations.
  24. First Stage Regulator:
  25. Reduce the cylinder pressure down to an outlet pressure not to exceed 80 psi. Regulator outlet pressure shall be adjustable.
  26. Regulator redundancy shall be achieved by 2 inter-nested long life springs.
  27. Body shall be constructed of a high strength heat treated aluminum alloy, and plated with a Teflon hard coat anodize to minimize corrosion and wear of internal components.
  28. Thread directly into CGA outlet of the cylinder valve.
  29. Mask Mounted Regulator:
  30. Equip regulator with a purge feature activated by depressing the center of the regulator cover. The purge button shall also function as a manual override to the first breathe on the regulator activation feature.
  31. An over-the-shoulder air-supply hose routed through a shoulder strap tunnel to the first stage regulator. The air-supply hose shall be made of silicone from second stage regulator attachment to an inline swivel or quick-connect.
  32. The detachable regulator shall have a push-to-connect attachment to the face piece.
  33. Regulator shall rotate freely when connected to the face piece, maximizing the user’s freedom of head movement.
  34. Second stage regulator shall not obstruct or reduce the field of vision of the wearer when installed on the face piece.
  35. When doffing the regulator, the disengagement of the regulator from the face piece shall simultaneously stop the flow of air.
  36. Second stage regulator shall not require any tools for disassembly. Number of parts in the second stage regulator shall not exceed a count of 25 parts.
  37. Primary Low Pressure Warning Device: An audible alarm shall be an air-actuated featuring a non-aspirating whistle automatically operating when air pressure in the supply cylinder reached approximately 25 percent of the rated service life. Include a mechanical pressure gauge mounted to the alarm manifold.
  38. Combination PASS And Redundant Low-Pressure Alarm
  39. In a single enclosure, contain a combination integrated PASS and redundant alarm.
  40. Equip the combination PASS and redundant alarm with a heat sensor.
  41. Include a time remaining display that updates calculations every 30 seconds, based on a user’s previous 3 minutes of air consumption. The initial calculation shall appear after 3 minutes.
  42. Equip the unit with a mechanical analog gauge, in the event of electrical/battery failure.
  43. Unit shall store up to 30 hours of use information, in the form of sessions that are generated each time the SCBA is pressurized. The sessions shall indicate the day, time, cylinder pressure, duration of use, and time of alarm (PASS, RA, and thermal), for each pressurization of the SCBA.
  44. Sessions shall provide the option of being downloaded to a personal computer for addition to maintenance records, or for use in incident investigations.
  45. Air-Line Accessory System: System shall consist of a waist-mounted junction block with an air-line connection angled downward from the wearer.
  46. Wall-Mounted Case: Leakproof, corrosion-resistant, tough, plastic case.

2.5SIGNAGE

  1. Engraved Plastic Laminate: Engrave through exposed face ply of plastic-laminate sheet to expose contrasting core ply.
  2. Face ply shall be red, core shall be white.
  3. Graphic Content and Style:
  4. Font Style: Upper case helvetica or arial.
  5. Content: As follows: Phone numbers of Energy Center and Security will be as directed by the Owner

R-404a and R-134a REFRIGERANT MONITOR

BLUE – CAUTION – LOW LEVEL LEAK DETECTED

AMBER – WARNING – HIGH LEVEL LEAK DETECTED

RED – DANGER – HIGH LEVEL LEAK DETECTED – UNSAFETOENTER BUILDING WITHOUT PROPERBREATHINGAPPARATUS

NOTIFY ENERGY CENTER (phone no) OR SECURITY(phoneno) IMMEDIATELYUPONINDICATION OF ANY ALARM

  1. Verify that refrigerants for this signage are refrigerants in use for the facility.

2.6SOURCE QUALITY CONTROL

  1. Refrigerant Monitor: Factory tested and certified.

PART 3 - EXECUTION

3.1OWNER PREFERRED INSTALLER

  1. The system described in this Section shall be installed by Ino-Tek, unless other installers are acceptable to the Owner.

3.2INSTALLATION

  1. Install labels and nameplates to identify monitoring devices and SCBA components according to regulatory agency requirements and Owner requirements.
  2. Install building wire and cable according to National Electrical Code.
  3. Install signal and communication cable according to National Electrical Code.
  4. Install all equipment, interconnecting tubing, and wiring in accordance with manufacturer’s installation instructions.
  5. Provide remote signal units (lights/strobes) with signage at each building entry door.
  6. Secure sign with mechanical fasteners placed through predrilled holes. Attach signs with stainless steel or brass fasteners and anchors suitable for secure attachment to substrate as recommended in writing by sign manufacturer.

3.3FIELD QUALITY CONTROL

  1. Manufacturer's Field Service: Engage a factory-authorized service representative to perform the following:
  2. Inspect field-assembled components, equipment installation, and electrical connections for compliance with requirements.
  3. Test and adjust controls and safeties.
  4. Test Reports: Prepare a written report to record the following:
  5. Test procedures used.
  6. Test results that comply with requirements.
  7. Test results that do not comply with requirements and corrective action taken to achieve compliance with requirements.
  8. Repair or replace malfunctioning units. Retest as specified above after repairs or replacements are made.

3.4ADJUSTING

  1. Adjust alarm set points.
  2. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

END OF SECTION

REFRIGERANT MONITORING AND SAFETYEQUIPMENT15635 - 1 of 7