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0 IVA. SYSTEM START UP <br />After all the wiring is complete, the system is ready for the start up test. <br />Tum on the AC power switch. The green LED lights on the active channels will light <br />to indicate power on status. <br />If the system is equipped with liquid sensors, the red LED lights might light up <br />momentarily, then turn off automatically after 1 or 2 seconds. <br />If the system is equipped with vapor sensors, the red LED alarm lights might light <br />several seconds after the power is turned on, and continue on for many minutes, <br />depending on the idling time of each individual vapor sensor. Allow at least two <br />hours of warm up time for the vapor sensors to be stabilized. If desired, turn off the <br />buzzer switch to avoid the warm up audio alarm. <br />IV.2. SYSTEM TESTS AND ADJUSTMENTS <br />Each active channel of the Leak Alert system is equipped with trimpots for liquid <br />and vapor alarm setpoint adjustments. In addition, there are two push button <br />switches mounted on the enclosure cover panel for alarm circuits functional tests. <br />IV.2.1. Liquid Alarm Adjustments <br />The liquid alarm adjustment trimpot marked LADJ is located above the <br />factorygreen power indicator LED. All liquid alarm trimpots have been adjusted at <br />the . adjustment is required. If, <br />adjustmentfor any reason, an <br />adjustment procedures. <br />Step 1. Make sure that the liquid sensor is located in dry ambient <br />. air. <br />Step 2. Adjust the LADJ trimpot clockwise until the LIQUID is <br />triggered, then back off the trimpot counter -clockwise 1 <br />to 2 turns from the alarm point. The liquid alarm setpoint <br />is now properly adjusted. <br />If actual sensor functional test is desired, simply submerge <br />the sensor housing slowly into the liquid, the alarm should <br />be triggered immediately. When the sensor is removed from <br />the liquid, the alarm might continue for a while until the <br />sensor element is dried. <br />IV.2.2 Vapor Alarm Adjustment <br />The vapor alarm adjustment trimpot (marked VADJ) is located below the <br />red vapor alarm LED. It is essential that the vapor sensor be warmed up for <br />at least two hours before the alarm setpoint is adjusted. <br />Prior to shipment, the vapor alarm setpoint is adjusted to approximately 2'/z <br />turns counter -clockwise from the alarm point when the sensor is sufficiently <br />