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View and Download Horstmann Economy 7 Quartz user instruction online. Electro-mechanical water heating control. Economy 7 Quartz network router pdf manual The Horstmann Economy 7 Quartz is an Electro-mechanical water heating control, which can be set to take advantage of cheap night-rate electricity,The Horstmann Economy 7 Quartz is an. Electro-mechanical water heating control, which can be set to take advantage of cheap night-rate electricity, Manual boost timer provides extra hot water in the daytime, should it be needed. Economy 7 Quartz is the standard by which all other water heating controls Designed for use with Economy 7 off peak rate overnight electricity, the Economy 7 Quartz is the standard by which all other water heating controls. The battery requires charging before the clock will rotate, this can take up to 15 minutes. ECONOMY 7 QUARTZ. INSTALLATION INSTRUCTIONS. HORSTMANN. QUESTIONS