Clack, Control Unit, models:

WS 1	Parts And Operational Manual
WS1 Series	Installation, Operation & Maintenance Manual
WS15P	Parts And Service Manual
WS1TC Series	Installation, Operation & Maintenance Manual
Water Specialist 2H	Manual
Water Specialist CI WS1	Installation, Operation, Maintenance Manual
Water Specialist EI	Programming And Cover Drawing Manual
Water Specialist WS1.25CS	Instruction Manual
Water Specialist WS1TC	Operation And Instruction Manual
Water specialist WS2H	Manual