Belimo 22G14-5C - Installation; Monitor Placement

Digital gas monitoring
3.0 Installation
3.1 Monitor Placement
Coverage
Guidelines for placement of diffusion type monitors are based on
the reasonable delay for gas to get from the source to the sensor.
All monitor sensors combinations are created equal in this regard.
• For air quality control of exhaust emissions and
accumulations of toxic gases the generally acceptable
maximum radius of coverage is 50 feet (15 meters).
Approximately 7500 square feet (700 square meters).
• For leak detection of combustible gases, ammonia,
refrigeration gases the maximum radius is 30 feet (10 meters).
The radius of coverage of any monitor does not extend beyond
any obstruction that impedes natural circulation of air. This
includes walls, stairs, elevators, shelving with solid ll, tool
chests, etc. The sensor must “see” the area of coverage; if not,
additional monitors are required.
Mounting heights for gas monitors are based on density relative
to air.
1. Lighter than air: Hydrogen (H

), Methane (natural gas,
CH
4
), Ammonia (NH
3
):
Install 1 to 3 feet (0.3 to 1 meters) from ceiling.
2. Similar to air (mixing evenly with air): Carbon monoxide
(CO), Nitrogen dioxide (NO

), Oxygen (O

), Carbon
dioxide (CO

):
Install from 3 feet (1 meter) from the oor to half of
the ceiling height. For vehicle emissions (CO + NO

),
install at 3 to 7 feet (1 to 2 meters) from the oor
(Recommended: 1.5 meters / 5 feet for CO). When
diesel exhaust is above the vehicle (example for
heavy equipment), install NO

monitors at ~50% of
the ceiling height and above the vehicle height.