Secure E7+ Smart Immersion Heater Timer Control Bluetooth Replacement for Horstmann Electronic 7 Economy 7 Quartz. 5.0 out of 5 stars 1.. Immersion Timer - Smart Economy 7 Thermostat - Quick & Easy to fit onto your Existing Electric Hot Water Cylinder (P.I.L). The OP-ECOSAVE Immersion Heater / Economy 7 Timer is a mechanical 24 hour multi tariff timeswitch used to control 3KW electric immersion heater elements for timing of water heating during low tariff electricity supply periods, and a boost function selectable for 15, 30, 60 or 120 minutes for peak tariff periods. Suitable for use in dry rooms only!
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Product information. Secure (Horstmann) Economy 7 Timer & Boost Control E7Q. Immersion heater control designed for use with Economy 7 off peak rate overnight electricity, the E7 Quartz is the standard by which all other water heating controls are judged and is the all time best seller in water heating controls. Guarantee - 1 year.. The Cotherm P.I.L, all-in-one Economy 7 immersion heater timer + thermostat, is extremely quick and easy to retro-fit onto the existing electric hot water cylinder. The pre-wired unit offers a simple 4-stage installation process. Rapid, safe, no tank drain-down and ultimately, no mess or inconvenience..
