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Industrial Combustion – Lead Lag System

Boiler Lead Lag Master System for Steam or Hot Water Service
Advanced Automation Technology
Increased Fuel Savings
NYC DEP, UL and cUL Approved


The LLM (Lead Lag Master) is the perfect solution for automation and control of multiple boilers. It performs the function of a boiler master controller by sequencing the boiler(s) on and off and controlling the main header steam pressure or water temperature precisely. It is used in conjunction with the local controls such as L91 or T991A. Major benefi ts are extending boiler life, providing energy to the facility as required and saving fuel by eliminating idle time.


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