Installing Thermostat To Sub-Base - Lennox S40 Installation And Setup Manual

2. Detach sub-base from thermostat body.
3. Determine the best location to install wall plate. Ideal location should be
located away from outside wall, direct sunlight or discharge air vents. The
thermostat should typically be installed at least 5 feet up from the floor.
4. Cut or drill a small hole for thermostat wiring.
6. Pull about three inches (75mm) of thermostat wire through the opening
and remove the outer thermostat wire jacket.
Seal wire hole in wall to prevent
cold or hot air from affecting temperature
sensor in display.
IMPORTANT
Seal wire hole in wall to prevent cold or hot air from affecting temperature
sensor in Thermostat.
8. Strip a maximum of 1/4" (6 mm) insulation from end of each wire. For best
results, only strip sufficient insulation for wire to insert into the terminals
without any wiring exposed.
9. Use a level to align the sub-base or wall plate on wall horizontally.
10. Use sub-base as a template to mark the desired mounting hole locations
on the wall.
NOTE: Make sure the UP arrow on the sub-base is pointing up.
3/8" (10 mm)
Diameter Hole
1/4"
Thermostat Sub-base
(Front View)
11. Drill 3/16" (5 mm) holes at marked locations on the wall for anchors. Then
insert wall anchors into holes until flush with the wall.
12. Secure sub-base with provided #6 x 1.25" pan-head screws (4).
13. Connect thermostat wiring to sub-base screw terminals.

Installing Thermostat to Sub-Base

1. Hold the thermostat by the edges, line it up with the sub-base (horizontal
position), and move the thermostat toward the sub-base.
2. Center the cavity on the back of the display over the sub-base.
14
Install subbase with arrow
pointing up.
Use the subbase as a template to
mark the desired mounting hole
locations on the wall.
Install HD Display with UP arrow pointing
up when attaching to subbase.