A18.REV

CARBON MONOXIDE DETECTION SYSTEM

NOTE: FINAL DATE: APRIL, 1988.

NOTE: THIS SPECIFICATION IS FOR A SEQUENTIAL SAMPLING GAS DETECTION SYSTEM

Part 1 -	GENERAL

1)	SUMMARY

A.	Section includes:

The Contractor shall furnish and install a carbon monoxide detection system to continuously monitor the atmosphere within the garage facility. The system shall be capable of activating exhaust fans and alarm devices in response to an increase in the carbon monoxide level, and shall consist of a centrally located control panel, sample tubes, end-of-line fiters, and calibration equipment

1.

2.

B.	Products Furnished but not Installed Under this Section:

1.

2.

C.	Products Installed but not Furnished Under this Section:

1.

2.

D.	Related Sections:

1.	The general provisions of the contract.

2.	Electrical specifications.

E.	Allowances:

F.	Unit Prices:

1.	Analyzer

2.	Zero and Span Gas

3.	End-of-line filters

G.	Alternates:

2)	References

A.	CODES AND STANDARDS

1.	Sensor assemblies to be rated explosion-proof and suitable for N.E.C. installation in Class 1, Groups C, D locations

3)	SYSTEM DESCRIPTION

A.	Design Requirements:

1.	Air to be sampled by electrochemical paloragraphic fuel cells to react catalytically

2.	When carbon monoxide is chemically oxidized, current signal is to increase proportional to the carbon monoxide concentration

3.	When carbon monoxide concentration exceeds set limits, it is to activate warning light and alarm circuitry

4.	System to indicate.

a.	Malfunctioning sensor.

b.	Loss of power.

5.	When system goes into alarm, the following shall occur:

NOTE: SELECT AS APPLICABLE AND IDENTIFY ALARM SET POINTS

a.	Activate audio/visual alarm.

b.	Indication on AMCS.

c.	Start exhaust fans.

6.	Sequencing electronics shall be microprocessor based with alphanumeric display and keypad to provide for programming of sampling sequence and all alarm set points and relay output control

7.	System shall be capable of automatic zero and span calibration on a programmed basis, with override for manual calibration

8.	Four alarm set points shall be provided for each sample point with manual or automatic alarm reset selectable for each point

9.	Analysis dwell time per sample point shall be fully adjustable, and an automatic extended dwell shall be activated if any point reaches a low level reading. Extended dwell shall be fully programmabl

10.	LED indicators shall be provided to indicate which point is being sampled, trouble condition, and calibration mode. Additionally, (4) LED's shall be provided for each sample point to indicate actual alarm level.

11.	Program memory shall be protected (non-volatile), and a battery backup shall be provided to retain current alarm status. A keylock security circuit shall protect all programming from tampering

12.	Manual sampling mode shall be provided to override the automatic sequence and allow for extended sampling of a single point

13.	An RS-232 output shall be provided to allow recording of all alarm events

B.	Performance Requirements:

1.	Carbon monoxide analyzer shall be capable of measurement in the range of 0-100 0-500 parts per million.

2.	Analyzer zero drift - 1% full scale in 24 hours

3.	Analyzer span drift - 1% full scale in 24 hours

4.	Analyzer repeatability - 1%

5.	Analyzer life - 2 years

6.	Analyzer shall be equipped with a reference meter mounted in the control panel which shall display current analyzer output in the range or 0-100 0-500 ppm

NOTE: SELECT APPLICABLE RANGE

C.	System Operation:

1.	If the following concentration levels of carbon monoxide are reached, the corresponding control function or alarm response will be performed by the co detection system.

a.	50 ppm - start garage exhaust fan, (GX-).

NOTE: ONLY APPLICABLE FOR TWO SPEED FANS

2.	100 ppm - switch garage exhaust fan, (GX-), to high speed.

3.	300 ppm - indication on AMCS of high CO level.

4.	400 ppm - activate audio/visual alarms.

NOTE: SELECT APPROPRIATE CONCENTRATIONS

4)	SUBMITTALS

A.	Product Data:

1.

2.

B.	SHOP DRAWINGS:

1.	Complete drawings and manuals.

a.	Description of operation.

b.	Technical literature.

c.	Data bulletins.

2.	Associated wiring diagrams.

3.	Fully dimensioned housing and mount drawings, including information on finishes

4.	Wiring routes, and types.

5.	Tubing routes.

C.	Samples:

D.	Quality Control Submittals:

1.	Design Data

a.

b.

2.	Test Reports

a.

(1)

(2)

b.

3.	Certificates

a.

b.

4.	Manufacturer's Instructions

a.

b.

5.	Manufacturer's Field Reports

a.

b.

E.	Contract Closeout Submittals:

1.	Project Record Documents

a.

b.

2.	Operation and Maintenance

a.	Provide four bound manuals to the engineer. Each shall contain printed operating instructions for all system functions whose format has been compiled specifically for the system. Manuals shall contain "as built" schematic wiring diagrams of each equipmen item, parts lists, and maintenance notes.

b.

3.	Data

a.

b.

4.	Warranty

a.	Guarantee system, in writing, against defects workmanship and material for one year after acceptance. During this time the entire system is to be kept in proper operating condition at no additional labor or material cost to owner

b.

5)	QUALITY ASSURANCE

A.	Qualifications:

1.

2.

B.	Regulatory Requirements:

1.

2.

C.	Certifications:

1.

2.

D.	Field Samples:

1.

2.

E.	Mock-Ups:

1.

2.

F.	Pre-Installation Conference:

1.

2.

6)	DELIVERY, STORAGE, AND HANDLING

A.	Packing and Shipping:

1.

2.

B.	Acceptance at Site:

1.

2.

C.	Storage and Protection:

7)	PROJECT CONDITIONS

A.	Environmental Requirements

1.

2.

8)	SEQUENCING AND SCHEDULING

9)	WARRANTY

A.	Special Warranty

1.

2.

10)	MAINTENANCE

A.	Maintenance Service

1.	Service must be rendered within 24-hours of notification.

2.	The manufacturer of the major component shall maintain a replacement parts department and provide and recommend test equipment when needed. A complete parts department shall be located in a geographical proximity consistent with the most expedient method of shipping replacement parts. An ample stock of individual components and equivalent unit replacements shall be carried for as long a period as demand warrants. This period shall extend well beyond the normal life expectancy of the equipment.

B.	Extra Materials

1.

2.

Part 2 -	PRODUCTS

1)	MANUFACTURERS

A.	Mine Safety Appliances (MSA)

B.	General Monitors

2)	MATERIALS

A.	Wire and Conduit

1.	In accordance with electrical provisions.

3)	EQUIPMENT

A.	Sensor:

1.	Electrochemical polargraphic fuel cell.

2.	Power requirement: 12 VDC nominal at 150 ma.

3.	Ranges: 0 to 100 ppm CO or 0 to 500 ppm Co.

NOTE: SELECT APPROPRIATE RANGE

4.	OPERATING TEMPERATURE: minus 10 deg C to 50 deg C (14 deg F to 122 deg F)

B.	Control Panel:

1.	The control panel shall be wall mounted or free-standing type, and shall contain sequencing electronics, carbon monoxide analyzer, sample pump, strip chart recorder, and all necessary valves, flowmeters, filters, and relays to provide for a complete sequential sampling system for ------ points of detection

2.	Sample pump shall be dual-head positive displacement diaphragm type. One head shall provide sample suction, while one head shall provide for by-pass, whereby suction shall be applied to all sample tube lines at all times.

3.	Strip chart recorder shall be data-logger type; and shall accept the RS-232 signal from the microprocessor upon an alarm condition being reached. Recorder shall be capable of printing time, sample point, and analyzer reading.

4.	Control panel shall include inlet fixtures for all sample tubes, zero gas, and span gas, and shall include outlet fixtures for analyzer exaust and by-pass exhaust. A filter/coalescer shall be provided in the line feeding the analyzer to remove any condensate

5.	Power:

a.	115 volts, 50/60 Hz.

6.	Analog signal: 0-1 vDC

7.	Operating temperature: (0 deg F to 130 def F) minus 18 deg C to 54 deg C

8.	Relays: 3 (trouble, warning, alarm) S.P.D.T., 5-amp contacts.

C.	Sample tubes:

1.	Contractors shall furnish and install all sample tubes from each of the sample pick-up points to the control panel. Sample tube shall be 3/8" O.D. Type L hard drawn seamless coppe

2.	Sample tube to be installed in an orderly fashion. all bends shall form right (90 degree) angles and tubing routes shall be parallel or perpendicular to the walls. Secure all sample tubes to columns and slab.

3.	Sample pick-up points shall be located 4'-0" off the floor.

D.	End-of-line filters:

1.	An end-of-line filter shall be installed at each sample pick-up point as provided by the detection system manufacturer.

E.	Calibration equipment:

1.	Contractor shall provide all of the necessary calibration equipment, including one each 200 cubic ft. cylinder of zero gas and span gas, and necessary pressure regulators

F.	Uninterruptible Power Supply:

1.	Capable of maintaining full operation of the system for not less than 1 hour

2.	Switchover shall be instantaneous and automatic upon failure of primary power source.

3.	Batteries:

a.	Lead-calcium,rechargeable.

4.	Battery charger:

a.	Current limited with high/rate/float maintenance rate.

b.	To return fully discharged battery to 70 percent of charge within 12 hours

5.	Enclose in control cabinet or separate battery/charger cabinet.

G.	Audio/visual alarms

1.	High intensity flashing light and horn.

2.	Both components to be powered by the UPS.

3.	Light portected by lexan lens.

4.	Light to flash at the rate of two flashes per second.

5.	Horn output at 3.0 meters (ten ft): 95 DB or greater.

4)	COMPONENTS

5)	ACCESSORIES

6)	FABRICATION

A.	Shop Assembly:

B.	Shop/Factory/finishing:

C.	Tolerances:

7)	SOURCE QUALITY CONTROL

A.	Tests:

B.	Inspection:

C.	Verification of Performance:

Part 3 -	EXECUTION

1)	EXAMINATION

A.	Verification of Conditions:

2)	PREPARATION

A.	Protection

B.	Surface Preparation

3)	ERECTION

4)	INSTALLATION

A.	Provide wiring between system devices as specified by equipment manufacturer

B.	Provide emergency power.

C.	Wiring to be concealed.

D.	Pipe all control cabinet exhausts to outside atmosphere (or) garage exhaust duct

E.	As it is not practical to enumerate in these specifications all details of fittings and accessory equipment required for proper operation of the system herein described, it is understood that they will be supplied by the Contractor without extra compensation

F.	Electronic component models must have been commercially available for at least one year prior to bid.

5)	APPLICATION

A.	Special Techniques

B.	Interface with Other Products

C.	Tolerances

6)	FIELD QUALITY CONTROL

A.	Tests

1.	Contractor shall provide the services of qualified vendor personnel to completely check and start-up system for a period of (1) full day

2.	Submit the Owner and Engineer verification of testing. This shall include a summary of the testing procedure and the test results in typed or tabular form. System tested to verify

a.	Specified monitoring of areas in accordance with the functional requirements of the system. This will include introduction of appropriate samples of carbon-monoxide at each sample pick-up point

b.	Specified operation of control function.

3.	Owner and Engineer reserve right to witness any part of the testing.

B.	INSPECTION

C.	Manufacturer's field Service

7)	ADJUSTING

8)	CLEANING

9)	DEMONSTRATION

10)	PROTECTION

11)	SCHEDULES