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HVAC controller

Blencathra
Happy new year to all, I am currently involved in sorting out a few problems with the heating in a gym, basically a gas  boiler heating radiators, working with gas engineer, part of the system has a HVAC hot air blower and extractor controlled by one of these


Landis & Gyr RWF 61.1 Polygyr Temperature Contoller 

https://www.ebay.co.uk/itm/Landis-Gyr-RWF-61-1-Polygyr-Temperature-Contoller-with-12-month-warranty-/112589994153


There are two thermocouples connected to it which are attached to the HVAC plant, the unit does not appear to work, I imagine it will shut down the blowers if the hot water temp drops, as you can see i have found a reconned unit, but no manual is available, has anyone worked on this unit before, looks like early 90s


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    Manual was a big help, managed to translate the bits we needed, looks like the controller is driving a valve to control the hot water going to the heat exchanger, looks like the valve and/or the controller are goosed, as are two more on the hot water system, looking expensive, again many thanks
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  • 0
    Manual was a big help, managed to translate the bits we needed, looks like the controller is driving a valve to control the hot water going to the heat exchanger, looks like the valve and/or the controller are goosed, as are two more on the hot water system, looking expensive, again many thanks
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