Page 1: ...CT50A CT51 A CT52A CT53i Thermostats INSTALLATION INSTRUCTIONS CELIA is for most gas and oil heating systems CT53A is for millivoltage heating systems Do it yourself models PREPARATION ...
Page 2: ...CONTENTS STEP PREPARATION 1 THERMOSTAT FEATURES 2 REMOVING OLD THERMOSTAT 3 WIRE AND MOUNT NEW THERMOSTAT 4 CHECK OUT THE THERMOSTAT 5 THERMOSTAT SETTING 6 TROUBLESHOOTING 7 RECALIBRATE THERMOMETER 8 ...
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Page 5: ...es The fan switch COntrOiS a fOllOWS AUTO fan operates when heating or coaling system operates ON fan operates continu ous y THERMOSTAT SETTING q On CTS A lace the sys tem and fan switches at the desired setiings for operation q on a models mc e ihe temperature setting iever to the desired temperature com ort level ...
Page 6: ...er and put the system thermometer may need recalibration FO OW the proceduy below 0 q I the readings are different in ert Remove thermostat CO fzl a hex head wrench in the ther mometer shaft and turn it until the q set the cover on a table near antheimometel hz3 e the same reading accurate thermometer q into operation Replace cover and put the system ...
