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Installation and User Guide
5.
THERMOSTAT OVERVIEW
Before you begin using your thermostat, you should be familiar with
its features, display and the location/operation of the thermostat
buttons and switches.
5.1
Thermostat Operation
The Thermostat Buttons and
Switches
1
(Up arrow) Raises temperature setting.
2
(Down arrow) Lowers temperature setting.
3
FAN switch (ON, AUTO).
4
SYSTEM switch (COOL, OFF, HEAT, EMER).
Whenever BATT or
be unoccupied for an extended period and BATT or
8
8
10 9
6
appears in the display, new premium brand AAA alkaline batteries should be installed. If the house will
The Display
5
Indicates a malfunction with the system.
Flame icon ( ) is displayed when the SYSTEM switch is in the
6
HEAT position. Flame icon ( ) is displayed flashing when 2nd-
stage heat (Aux or Emergency) is energized. Snowflake icon
( ) is displayed (non-flashing) when the SYSTEM switch is in
the COOL position. Snowflake and Flame icons are displayed
(flashing) if the thermostat is in lockout mode to prevent the
compressor from cycling too quickly.
EMER is displayed flashing when the system switch is in EMER
7
position.
8
Displays current temperature.
9
Displays currently programmed set temperature (this is blank
when SYSTEM switch is in the OFF position).
10
"BATT" or
are low and should be replaced.
Fan
Off
Heat
On
Auto
Cool
Emer
3
4
5
8
7
6
is displayed, install new batteries before leaving
Pub. No.
11-HD24D1-1C-EN
is displayed when 2 "AAA" batteries
1
2
09/2020
Part No. 37-7792003
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