Electronic 7 Installation Instructions The Electronic 7 is an advanced water heating control, which can be programmed to take advantage of cheap night-rate electricity, so that there is a tank of hot water available for the morning. 1 WARNING : ISOLATE MAINS SUPPLY. BEFORE COMMENCING INSTALLATION ENSURE THE UNIT IS PROPERLY EARTHED.. The Horstmann Electronic 7 Water Heater Controller has been especially developed to control the immersion heater as economically and conveniently as possible. During the night, water in the tank will be heated by cheap night-rate electricity, ensuring a tank of hot water is available for the morning.
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Using the RESET. procedure located on page 2 of this User guide may rectify the fault. The indicator neon will illuminate but. Ensure that the Water Heater Switch on the front of the Electronic 7 is in the Timed. there is no hot water. position. If this fails to rectify the problem please contact a local heating engineer. or qualified electrician.. Introduction. The Horstmann Electronic 7 is an advanced water heating control, which can be programmed to take advantage of cheap night-rate electricity, so that there is a tank of hot water available for the morning. INSTALLATION AND CONNECTION SHOULD ONLY BE CARRIED OUT BY A SUITABLY QUALIFIED PERSON AND IN ACCORDANCE WITH THE CURRENT EDITION.
