Firetrol combined automatic and manual Mark IIXG based diesel engine fire pump controllers are intended for starting and monitoring fire pump diesel engines. They are suitable for use with both mechanical and electronic type engines. The controller is available for 12 or 24 volt negative ground systems, using lead acid or Nickel-Cadmium batteries. The controller monitors, displays and records fire pump system information. Approvals Firetrol fire pump controllers are listed by Underwriters' Laboratories, Inc., in accordance with UL218, Standard for Fire Pump Controllers, CSA, Standard for Industrial Control Equipment, and approved by Factory Mutual. They are built to meet or exceed the requirements of the approving authorities as well as NEMA and the latest editions of NFPA 20, Installation of Centrifugal Fire Pumps, and NFPA 70, National Electrical Code. Battery Chargers The controllers are supplied with two fully automatic, 200 amp hour, 4 step battery chargers. The chargers feature Switching Technology and 10Adc Pulse-Width Modulated Output Current. The 4 step charging cycle is as follows: Step 1 - Qualification Stage During this stage, the battery charger checks the batteries to insure they can accept a fast charge. It also checks for missing or defective batteries. If a missing or defective battery is detected, a fault will be given. Step 2 - Fast Charge Stage Charges the batteries until they reach peak voltage. Step 3 - Bulk Charge Stage Charges the batteries at a constant potential of peak voltage until current reaches 500mA. Step 4 - Float Charge Stage Trickle charges the batteries to maintain peak potential.