COMPLIANCE INFO_1986-2005 - Laserfiche WebLink

Home Browse Search

type) individually. Should there be a leak in the inner shell (product side) or the outer shell (ground water), the sensor contact will activate the field contact input to the annunciator module (pin 4, 8 or 12). The relays (CA1, CA2, CA3) will be de -energized, providing voltage to the lamps (AL1, AL2, AL3) via the appropriate contact (A1-1, A2-1, A3-1). The relays (S1, S2, S3) energize, closing the contact (S1-2, S2-2, S3-2), which energizes the horn relay (CRH). Pressing the SILENCE button deactivates CRH, silencing the horn. The alarm lights will stay lit until the leak sensor contacts indicate normal condition, i.e., liquid removed from the contaminated tank. The tank leak sensing device is of a mechanical float design, capable of sensing levels as low as .50 to .75 inch at the bottom of the containment tank. 3.3 Hydrocarbon Vapor Sensor Monitor The Model X76 Annunciator Module can be utilized as an alarm indicator in conjunction with a combustible -gas detector. The combined system is suitable to monitor existence of hydro- carbons in controlled atmospheres and process streams. The sensor supplied will monitor waste oils, diesel and gasoline hydrocarbons. When vapor in excess of 500 ppm is detected, an alarm will be actuated via the Model X76 Monitor. 4.1 General Installation, X76 The Series X76 Line and Leak Monitoring System is available in a wall -mounted, NEMA Type 1 enclosure. The enclosure holds the front -panel - mounted four- or eight -module chassis and the FM -approved X53 interface with associated power supply accessible through the front door. The clearly identified wire termination, located on the inside rear wall, provides ease of wiring for sensor and power connections. 4.2 Field Wiring The system's field wiring is shown in schematic X76D32 and must be followed explicitly. The system requires 115 VAC, 60 Hz supply voltage, terminated to the appropriate terminals, to power the modules and the X53 interface power supply. The field wires from the product line pressure sensor and the dispenser ON/OFF switch are wired to the rear terminals (six -point) of the module chassis. All field wires of sensors to be annunciated (such as the tank level and vapor sensor) that are in a Class I, Division 1 area, are to be terminated to the input of the Model X53 Interface chassis. CAUTION: The field wires from the hazardous area must be fed to the system via conduits separated from any conduits carrying high voltage (115 VAC) to avoid accidental connection of high voltage or current to the hazardous area (Factory Mutual) requirement. The only system modules requiring calibration are the product dispenser modules and vapor sensors. These modules and sensors are precisely calibrated at the factory before shipment and should not be tampered with in the field. However, they should be re- calibrated once a year by a certified technician to insure proper and long trouble-free operation. CAUTION: The system's internal terminations are powered by 115 VAC. Touching these terminals can cause electrical shock. The Series X76 Leak Monitor System is designed for trouble-free operation and should not require trouble- shooting in the field. Should the system exhibit problems, the certified technician of the service organization indicated on the door of the monitor may be called for assistance. Since the system consists of individual plug-in modules, the initial repair should be limited to the exchange of modules and verification of proper wiring of all incoming field connections. The X76 Dispenser Module design consists of a minimum number of active components. It is unlikely that the module will malfunction. In the event that a problem should occur, return the dispenser module to the factory for repair. Although field repair is not advised, it may be performed through judicious use of the schematics and parts list provided. All computer TRIAC outputs for pump control must not exceed 1 to 2 mA leakage in the OFF position. Should this condition be present, voltage drop resistors and/or interfacing relays may be needed. CAUTION: The X76 Dispenser Module will automatically start turbine relay every 45 to 60 minutes of inactivity. Turn the 240 VAC breaker OFF when servicing turbine. All computer and pump control circuits must be run in the same phase as the X76 monitor. 6.2 Annunciator Module Troubleshooting of the annunciator module should be carried out systemically, since this module operates in conjunction with the X53