Product Specifications Auxiliary Equipment Optional Boiler Operating Controls Assist you in selecting the Optional Operating Controls to meet your requirements. Select Model Name to consult the Boiler Book Section. Lead/Lag System (Two boilers) Access general product information . The lead/lag system consists of controls that sequences the starting, stopping and controls modulation firing rate for two boilers. It can be used for either steam or hot water applications. . Lead/Lag System (Two through four boilers) Access general product information . The lead/lag system is a specialized digital control that sequences the starting, stopping and controls modulation firing rate for two through four boilers. It can be used for either steam or hot water applications. . Low Fire Hold Control Access general product information . Prevents automatic control of burner firing rate until pre-determined boiler water temperature is reached. . Minimum Temperature-Low Fire Hold Control Access general product information . Maintains minimum boiler water temperature in steam boilers at low fire mode of operation during off periods. . Assured Low Fire Cutoff Access general product information . Assures that the burner shuts off at minimum firing rate when signaled from remote disable source. . Remote Modulation Access general product information . Provides burner modulation from a customer supplied 4-20 ma control signal. Ties boiler firing rate control with customer control system (for example, building management, boiler room master, lead/lag control). . Automatic Fuel Changeover Access general product information . Provides sequence to allow burner to automatically change fuel. .

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