Page 2
Table of Contents
General...................................Page 2
Shipping and Packing List........Page 2
NecessaryTools.......................Page 2
Thermostat Location................Page 2
Remove Existing Thermostat...Page 3
Thermostat Installation............Page 4
Wiring Connections..................Page 4
LED Indicator...........................Page 5
Outdoor Temperature Sensor...Page 5
Field Wiring Diagrams..............Page 6
Install Batteries........................Page 8
Attach T’stat to Wallplate..........Page 8
Set Calendar and Clock............Page 8
Installer Set−Up........................Page 9
System Test...........................Page 15
Troubleshooting.....................Page 16
General
The Lennox Elite
®
Series X4146 ther-
mostat provides control for single−
stage heating and cooling. The ther-
mostat may be used to control either a
conventional HVAC system which in-
cludes an outdoor condensing unit and
indoor furnace or a heat pump unit and
indoor air handler. The thermostat ter-
minal block accommodates 24V power
common from the furnace or air han-
dler. Three AAA alkaline batteries are
provided to be used as an alternate
power source or as a back−up in case
of an interruption of power.
Shipping and Packing List
Package 1 of 1 contains
1 − Assembled thermostat
(includes wallplate and thermostat)
1 − Bag assembly containing the fol-
lowing:
2 − Screws
2 − Wall anchors
3 − AAA alkaline batteries
1 − Installation instruction
1 − Owner’s guide
1 − Warranty certificate
Necessary Tools
• No. 2 Phillips screwdriver
• Standard pocket screwdriver
• Drill
• Drill bits (use 3/16" for drywall and
7/32" for plaster)
• Pencil
• Level
• Hammer
• Electrical tape
Thermostat Location
Install the thermostat about 5 feet
(1.5m) above the floor in an area with
good air circulation.
Do not install the thermostat where it
may be affected by the following:
• Drafts or dead spots behind doors
and in corners.
• Hot or cold air from ducts.
• Radiant heat from the sun or ap-
pliances.
• Concealed pipes or chimneys.
• Adjacent unconditioned areas
(outside wall behind the thermo-
stat)