When utilizing automatic vehicle shutdown, how will a vehicle operator be able to find a safe position for the machine before shutdown occurs?
Vehicle shutdown can be accomplished electrically using the shutdown relay in the CHECKFIRE® SC-N control unit and/or with a pressure switch. The pressure switch will not operate until the system discharges. If the fire suppression system is manually operated or if the CHECKFIRE® Series I system is being used, a pressure switch should be included to shut down the vehicle (the Series I unit does not have integral shutdown capability). If the CHECKFIRE® SC-N control unit is used, there is an integral shutdown relay that can be utilized. This shutdown relay will operate at the end of an alarm time delay that can be set for up to 30 seconds after the initial alarm. This time delay can be reset simply by pushing the delay button on the front of the unit, which will restart the time delay. This time delay period can be reset continually until a safe position is found for the machine. NOTE: ANSUL recommends using a pressure switch in addition to the CHECKFIRE SC-N control unit, even though sh
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