Carrier 53DFS250-FS Manuals

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 02-DFC534SI Printed in U.S.A. Form 53-4SI Pg 1 11-05 Replaces: 53-1SI Book 1 4 Tab 3e 2f PROGRAMMABLE STEP #1 PREPARATION 1 STEP #2 WIRE CONNECTIONS 1 SAMPLE WIRING DIAGRAM 2 STEP #3 TEST OPERATION 2 ADVANCED SETUP 2 ABOUT ADVANCED FEATURES AND OPERATION 3 TROUBLESHOOTING 4 CALIBRATION 4 This device complies with Part 15 of the FCC rules. Opera- tion is subject to the following 2 conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interfer- ence that may cause undesired operation. Refer to the chart below, or the wiring diagram that follows. *Not applicable for use with Duct-Free Splits heat pump systems. Table of Contents IMPORTANT: Follow Installation Instructions carefully. CAUTION: DISCONNECT POWER TO THE SYS- TEM BEFORE REMOVING THE OLD THERMOSTAT AND INSTALLING THE NEW THERMOSTAT. SERIOUS PERSONAL INJURY COULD RESULT. STEP #1 PREPARATION A. Proper installation of the thermostat will be ac- complished by following these step by step in- structions. If you are unsure about any of these steps, call a qualified technician for assistance. B. Assemble tools and recommended junction box. For best operation, install the thermostat in a junc- tion box that is free from drafts that originate in- side the wall. C. Carefully unpack the thermostat. Save the screws, bracket, and instructions. D. Power to the system should be off for installation or replacement. STEP #2 WIRE CONNECTIONS FUNCTION INSTALL ON THE CONNECTOR MARKED Lo Fan G1 Compressor Y Heating H2 24 v Power R Common C Rev. Valve O* Hi Fan G2 Remote Sensor +5vdc RS+5 Remote Sensor Signal RS Remote Sensor Ground RS GND Dry Contact Switch 1 CK1 Dry Contact Switch 2 CK2 Flat Blade Screwdriver Wire Cutter and Stripper .366” WALL WALL FLATSTAT EXTENDS LESS THAN 3/8" FROM THE WALL. Flatstat in Small J-Box Installation Instructions DIGITAL THERMOSTAT 53DFS250-FS Heat Cool and Cooling Only HEAT AUTO COOL !