Praher Plastics, Control Unit, models:

4 PVC-U	User Manual
AQUASTAR mp6 plc	Operation Manual
AQUASTAReasy II	User Manual
Aquastar	Manual
Aquastar Comfort	Replacement Manual
Aquastar Comfort 1001	Manual
Aquastar Easy	Replacement Manual
Aquastar MP6 pos	Manual
K4	Assembly Instructions Manual
K6 PVC	Appendix