Lennox International Inc. 43558 User Manual
Page 4
6
6
Read This Before Installing Thermostat
IMPORTANT
1
Read the entire installation section of this Owner’s Manual
thoroughly before you begin to install or operate your Cli-
mate Technology Thermostat.
INSTALLATION
2
All installation is normally performed at your
thermostat.
ARMCHAIR PROGRAMMING
3
You can program your thermostat before installation by in-
serting the batteries and following the instructions starting
on page 18. This can be done while you relax in your favorite
chair and is a very good way to familiarize yourself with all the
functions of your Climate Technology Thermostat.
SYSTEM COMPATIBILITY
4
Your Thermostat is designed to operate these
24-Volt systems:
■ Multi-stage heat pumps with auxiliary heat
■ Multi-stage systems (2 stage heat, 2 stage cool)
This thermostat will not control 120/240 Volt systems or
millivolt systems.
COMPRESSOR PROTECTION
5
The thermostat provides a 3.5 minute delay after shutting off
the heating or cooling system before it can be restarted.
This feature will prevent damage to your compressor caused
by rapid cycling.
TEMPERATURE RANGE
6
Your thermostat can be programmed between 45
°
F and 95
°
F
(7
°
C and 35
°
C). However, it will display room temperatures
from 15
°
F to 99
°
F (-9
°
C and 37
°
C). “HI” will be displayed if
the temperature is higher than 99
°
F (37
°
C), and “LO” will be
displayed if the temperature is lower than 15
°
F (-9
°
C).
AUTO RECOVERY
7
Your thermostat is set from the factory to gradually recover
the room temperature from an energy saving program to
your comfort program. Therefore, the thermostat may turn your
system on several minutes prior to your programmed time. This
operation is normal, but can be turned off. Refer to the Options
Menu information on pages 18-21.
41653_model43558.pmd
7
OPERATION
8
This system operates on your system’s 24 Volt power supply.
The supply is monitored by the thermostat, and it will stop
functioning if AC power is lost. (When using backup batteries,
“No AC Pwr” will be displayed.) All system controls will remain
off until power is restored.
NOTE:
The INDIGLO
®
Night-Light will not function when
AC power is lost.
NOTE:
Any remote temperature sensors (if used on your
system) will not operate when AC power is lost.
BATTERY WARNING
9
Batteries may be used optionally to prevent the loss of your
thermostat’s clock, programs and options due to a power
outage. However, when the batteries become drained, a low
battery warning will appear on the display. When this message
occurs, install 2 new AAA batteries. You have approximately 30
seconds when changing the batteries to keep thermostat’s
clock and program settings.
NOTE:
The default system selection at power-on is HEAT.
Batteries are recommended to prevent an undesired sys-
tem change due to a power outage.