CT50A. CT51 A, CT52A-, CT53i Thermostats INSTALLATION CT53A INSTRUCTIONS CELIA is for most gas and oil heating systems. is for millivoltage Do-it-yourself heating systems.
CONTENTS STEP PREPARATION 1 THERMOSTAT REMOVING FEATURES 2 OLD THERMOSTAT 3 WIRE AND MOUNT CHECK NEW THERMOSTAT OUT THE THERMOSTAT THERMOSTAT SETTING TROUBLESHOOTING RECALIBRATE 4 5 6 7 THERMOMETER 8
CHECK OUT THE THERMOSTAT operates. OFF-heating and cooling systems are disconnected. COOL--cooling system only operates. The fan switch COntrOiS a* fOllOWS: AUTO-fan operates when heating or coaling system operates. ON--fan operates continuous,y. THERMOSTAT SETTING q a,,models. mc’“e ihe q on temperature setting iever On CTS,A. ,,lace the system and fan switches at the desired setiings for operation. to the desired ,ort level.
Major swings RECALIBRATE THERMOMETER if the thermostat set point and the thermometer reading da not agree. the thermometer may need recalibration. FO,,OW the proceduy below. Fo;;rftilneadings replace 0 mometer cover are the same. and put the system readings different, in*ert -’ are Remove thermostat CO”fzl.q I,the theimometel~ hz3”e the same reading. set the cover on a table near an thermometer. q accurate q into operation.