Macurco DVP-120 User Instructions page 41

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Group 2 in each zone
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Group 3 in each zone
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Group 4 in each zone
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Group 5 in each zone
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Group 6 in each zone
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Group 7 in each zone

Group 8 in each zone
Carbon
Description
Monoxide
Type CO
Range 200 ppm
Alarm Level 200ppm
Warning Level 100ppm
Rising Level 35ppm
Falling Level 15ppm
Typical coverage for CO, CO2 and NO2 sensors is 5,000 sq. ft. (464.5 sq. m), 900 sq. ft. (83.6 sq. m) for combustibles and other toxic
gases (see the User Instructions of each sensor type for location and coverage details). Extra sensors may be needed near areas
where people work, such as toll booths. Macurco provides only the control panels and sensors. Fans, relays, and other devices are
provided by the contractor. See the appropriate building code for the size of fans and air changes per unit of time.
.
Type 2 NO2, Voting mode, Quorum = 1
Type 3 EX, Voting mode, Quorum = 1
Type 4 NH3, Voting mode, Quorum = 1
Type 5 H2S, Voting mode, Quorum = 1
Type 6 REF, Voting mode, Quorum = 1
Type 7 CO2, Voting mode, Quorum = 1
Type 8 O2, Voting mode, Quorum = 1
Nitrogen Combustible
Dioxide Gas
NO2 EX
20 ppm 50%
5ppm 20%
3ppm 15%
2.5ppm 10%
1.2ppm 5%
Figure A-1 System Wiring Diagram
Hydrogen
Ammonia
Sulfide
NH3 H2S
100 ppm 50ppm
75ppm 20ppm
50ppm 14ppm
25ppm 8ppm
10ppm 3ppm
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Carbon
Refrigerants
Dioxide
REF CO2
1000 ppm 5,000ppm
300ppm 3,000ppm
200ppm 2,000ppm
100ppm 1,000ppm
50ppm 800ppm
Oxygen
O2
25%
19.5%
20.0%
20.3%
20.6%