Optimising Controllers Wet System - Sequence Controls

Sequence controls can improve overall fuel efficiency where multiple boilers and/or burners are employed in a system. Only sequence controllers that maximise fuel efficiency by optimising the numbers of boilers used and their firing rates to meet the required heat load, are eligible for Enhanced Capital Allowances.

Manufacturers should provide a detailed specification of the product, and an explanation of how it saves energy including evidence of its ability to control the operation and firing of the boilers in the system, and details of any independently audited installations

Sequence controls realise fuel savings by optimising the number of boilers used and/or burner firing rates to meet the required heat load. They are available either as standalone units for retrofitting to existing boilers, or as modular units that can be integrated into boiler, burner or other control systems.

Both standalone and modular type sequence controls are eligible for Enhanced Capital Allowances, providing they are microprocessor based and incorporate an algorithm that measures and adapts the sequence to match changes in heat demand, whilst maintaining minimum set temperatures.

Applicants must state clearly whether the sequence controller is designed for standalone use only or as modular unit that can be incorporated in other systems, and the specific features of each model sold.