Horstmann E7BX Ficha De Dados

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This simple boost control is intended for use with electric 
water heating systems where the immersion heater(s) are 
controlled by the Electricity Company's Radio Teleswitch, 
Radio Telemeter or Tariff time switch.
The E7BX allows the user to 'top up' the hot water if extra 
supplies are needed during the day time with the main water 
heating taking place overnight  using off peak electricity.
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Designed to accept wiring from both 24 hour and off peak 
circuits
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Adjustable 0-120 minute run-back boost timer
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Simple to install and use
E7BX
Water Heating Boost Control