Installation Manual

35
 Group 2 in each zone Type 2 NO2, Voting mode, Quorum = 1
 Group 3 in each zone Type 3 EX, Voting mode, Quorum = 1
 Group 4 in each zone Type 4 NH3, Voting mode, Quorum = 1
 Group 5 in each zone Type 5 H2S, Voting mode, Quorum = 1
 Group 6 in each zone Type 6 REF, Voting mode, Quorum = 1
 Group 7 in each zone Type 7 CO2, Voting mode, Quorum = 1
 Group 8 in each zone Type 8 O2, Voting mode, Quorum = 1
Description
Carbon
Monoxide
Nitrogen
Dioxide
Combustible
Gas
Ammonia
Hydrogen
Sulfide
Refrigerants
Carbon
Dioxide
Oxygen
Type CO NO2 EX NH3 H2S REF CO2 O2
Range 200 ppm 20 ppm 50% 100 ppm 50ppm 1000 ppm 5,000ppm 25%
Alarm Level 200ppm 5ppm 20% 75ppm 20ppm 300ppm 3,000ppm 19.5%
Warning Level 100ppm 3ppm 15% 50ppm 14ppm 200ppm 2,000ppm 20.0%
Rising Level 35ppm 2.5ppm 10% 25ppm 8ppm 100ppm 1,000ppm 20.3%
Falling Level 15ppm 1.2ppm 5% 10ppm 3ppm 50ppm 800ppm 20.6%
Typical coverage for CO 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.
.
Figure A-1 System Wiring Diagram