Carrier 53DFS250-FS Installation Instructions

PROGRAMMABLE
Table of Contents
STEP #1 PREPARATION
STEP #2 WIRE CONNECTIONS
SAMPLE WIRING DIAGRAM
STEP #3 TEST OPERATION
ADVANCED SETUP
ABOUT ADVANCED FEATURES
AND OPERATION
TROUBLESHOOTING
CALIBRATION
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.
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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 02-DFC534SI
Book 1 4
Tab 3e 2f
Installation Instructions
DIGITAL THERMOSTAT 53DFS250-FS
Heat Cool and Cooling Only
COOL
AUTO
H
EAT
1
1
2
2
2
3
4
4
Printed in U.S.A.
STEP #1
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.
Wire Cutter
Flat Blade
and Stripper
Screwdriver
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
Refer to the chart below, or the wiring diagram that
follows.
FUNCTION
Lo Fan
Compressor
Heating
24 v Power
Common
Rev. Valve
Hi Fan
Remote Sensor +5vdc
Remote Sensor Signal
Remote Sensor Ground
Dry Contact Switch 1
Dry Contact Switch 2
*Not applicable for use with Duct-Free Splits heat pump systems.
Form 53-4SI Pg 1
PREPARATION
FLATSTAT
EXTENDS
Flatstat
LESS THAN
in Small
3/8" FROM
J-Box
THE WALL.
.366"
WIRE CONNECTIONS
INSTALL ON THE
CONNECTOR MARKED
G1
Y
H2
R
C
O*
G2
RS+5
RS
RS GND
CK1
CK2
11-05 Replaces: 53-1SI