The biosystems gas detection equipment shall have all of its components, including the controller, RS-485 communication module and relay outputs boards in a single enclosure. Multiple enclosures requiring inter-wiring are not acceptable.
The Control Panel shall incorporate the necessary logic circuits to operate the exhaust/supply fans and the motorized dampers for fresh air and/or exhaust according to the specified logic of ventilation. For example, if the biosystems gas detection equipment operated by the 100 PPM CO contacts does not reduce the CO level below this value within 30 minutes (3 to 60 minutes adjustable), the Control Panel shall go on visual and audible alarm and also provide a contact for remote alarm indication or supervision.
All electrical connections shall be made by the electrical contractor according to diagrams shown on drawings furnished with the biosystems gas detection equipment by the manufacturer. Use 4-wire coded cable from station to station, maintaining color code. All wiring is low voltage (24V).
The VOC-2 biosystems gas detection equipment is designed for enclosed spaces where chemical reagents or known VOC pollutants could leak into the air and pose a danger to personnel. This biosystems gas detection equipment can cover up to 10,000 sq. ft. of clear, open space. It is designed to operate two-speed fans using two dry contacts that close at the appropriate low and high concentration levels for the toxic gas being detected. Standard calibration is with Toluene for set points at 1000 and 2000 PPM. Specific set-points for a wide variety of gases can be set at the factory. It also includes visual indicators on the front of the unit for low and high level with an audible alarm at the high level. The VOC-2 is constructed of heavy, damage-resistant PVC with vandal-proof screws. Units are available with integral (standard) or remote (optional) sensor heads. Typical installations for the biosystems gas detection equipment include chemical storage facilities and personnel lounges in industrial buildings.
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