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Digital Display Control Thermostats now available 
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The ZENITH range of heaters is in keeping with the intrinsic values of Thermalec® heaters, with its robust cast iron water vessel housing the new Titanium or Incoloy 825 8kW heating elements. ZENITH is designed with Thermalec's unique spiral flow to allow the pool or spa water to flow through the heater to reduce scale build up. 
 
The new control system features a 3 or 4 stage (depending on heater size) power-up sequence using electronic time delay relays to avoid power drain on full start-up. Each electronic time delay relay is variable, allowing the sequence of start-up to be varied to the requirement of the installation. This is a very useful facility, as in certain installations such as a pool or spa on a ship or yacht variable time delays are invaluable. 
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MORE INFORMATION 

For more information please take a look at the product specification sheet and product manual.