Doepke, Control Unit, models:

DRO 1U	Operating Instructions Manual
DSU 8plus	Installation And Operating Manual
Dupline DRO 1U	Operating Instructions Manual
Dupline DRO 2	Operating Instructions Manual
Dupline DRO 4	Operating Instructions Manual
Dupline DRO 4b	Operating Instructions Manual
Dupline DSM 4M	Operating Instructions Manual