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RTI Injection mixing control


i have a new customer who has a radiant system installed about 8 years ago. all radiant tubing and controls are by a company called RTI? its an under the floor radiant like staple up. the problem is after a power surge this RTI injection mixing control no longer displays anything on the LED display. i tested the system and it does work, atleast seems to work. the injection pump cycles, supply temp on radiant loops creep up to 150F (a little high) and return temps are at 110F. each radiant loop has a mix of floor coverings (tile, hardwood and carpet). this RTI control has all the temp setting in it as well as outdoor air senser. i have no info on this system ie temp curve reset. i can not find this company online and have been told they are no longer in business. i took a whole bunch of pictures in which i will post as soon as i can. any help would help a lot


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