Carrier 53DFS250-SL Installation Instructions Manual

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Installation InstructionsDIGITAL THERMOSTAT 53DFS250-SLCoolingOnly,Heat Cool,and Heat Pumpo ©MULTI-STAGE • SEVEN DAY PROGRAMMABLEB. Assemble tools:XFlat BladeScrewdriverWire Cutterand StripperC. Carefully unpack the thermostat. Save the screws,bracket, and instructions.D. Turn off the power to the system at the main fusepanel. Most systems have a separate breaker fordisconnecting power to the indoor and outdoorunits._ / :l-JF_P-1 i'_'II tit:l [_o] _,I_,I / [o] _,[,.'tSTEP #1 PREPARATIONSTEP #2 WIRE CONNECTIONSSAMPLE WIRING DIAGRAMSSTEP #3 TEST OPERATIONADVANCED SETUPABOUT ADVANCED FEATURESAND OPERATIONTROUBLESHOOTINGCALIBRATION11222355I IMPORTANT: Follow Installation Instructions carefullyCAUTION: DISCONNECT POWER TO THE SYS-TEM BEFORE INSTALLING THE NEW THERMOSTAT,SERIOUS PERSONAL INJURY MAY RESULT,This device complies with Part 15 of the FCC rules. Op-eration is subject to the following 2 conditions: (1) Thisdevice may not cause harmful interference, and (2) Thisdevice must accept any interference received, includinginterference that may cause undesired operation.Refer to the chart below, or the wiring diagrams thatfollow for thermostat functions and corresponding ther-mostat connectors.FUNCTIONLo FanCompressorHeating24 v PowerCommonRev. ValveHi FanRemote Sensor +5vdcRemote Sensor SignalRemote Sensor GroundDry Contact Switch 1Dry Contact Switch 2Defrost*Only used with Heat Pump systems.INSTALL ON THENEW THERMOSTATCONNECTOR MARKEDGtYH2RCO*G2RS+5RSRS GNDCK1CK2H1_I:l:_ r_| I"J-'l=1;/-'I-'Y-'I/ [o]_,IA. Proper installation of the thermostat will be accom-plished by following these step by step instructions.If you are unsure about any of these steps, call aqualified technician for assistance.Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 02-DFC535SI Printed in U.S.A. Form 53-5SI Pg 1 11-05 Replaces: 53-2SI