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Installation
Instructions
DIGITAL
THERMOSTAT
53DFST2-NP
Heat Cooland CoolingOnly
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I"J-'1:1:7±I-'_±'q
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OOoVA
PROGRAMMABLE
STEP #1 PREPARATION
STEP #2 WIRE CONNECTIONS
SAMPLE
WIRING
DIAGRAM
STEP #3 TEST OPERATION
ADVANCED
SETUP
ABOUT
ADVANCED
FEATURES
AND OPERATION
TROUBLESHOOTING
CALIBRATION
1
1
2
2
2
3
4
4
I IMPORTANT: Follow Installation Instructions carefully
CAUTION: DISCONNECT POWER TO THE SYS-
TEM BEFORE INSTALLING THE NEW THERMOSTAT,
SERIOUS PERSONAL INJURY COULD RESULT,
A.
a.
C.
D.
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 a quali-
fied technician for assistance.
Assemble tools:
Flat Blade
Screwdriver
Wire Cutter
and Stripper
Carefully unpack the thermostat. Save the screws,
bracket, and instructions.
Turn off the power to the system at the main fuse pan-
el. Most systems have a separate breaker for discon-
necting power to the indoor and outdoor units.
Refer to the chart below, or the wiring diagram that
follows for thermostat functions and corresponding
thermostat connectors.
FUNCTION
Lo Fan
Compressor
Heating
24 v Power
Common
Rev. Valve
Hi Fan
INSTALL ON THE
NEW THERMOSTAT
CONNECTOR
MARKED
Gt
Y
H2
R
C
O*
G2
*Not applicable for use with Duct-Free Split heat pump systems.
This device complies with Part 15 of the FCC rules. Op-
eration 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
interference 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-DFC536SI
Printed in U.S.A.
Form 53-6SI
Pg 1
11-05
Replaces:
53-3SI
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