Lennox Commercial Touchscreen Thermostat - Separate Wallplate from Thermostat; Wiring; Install Wallplate

Page 2
505103M 11/08
Separate Wallplate from Thermostat
Separate the wallplate from the thermostat (see fig-
ure 2).
THERMOSTAT
WIRE HOLE
M22267
WALLPLATE
Figure 2. − Separate Wallplate from Thermostat
Install Wallplate
Install the thermostat horizontally on the wall (see
figure 3):
1. Pull the wires through the wire hole on the
wallplate.
2. Position the wallplate on the wall with the arrow
pointing up. Level the wallplate for appearance
only.
3. Use a pencil to mark the mounting holes.
WA L L
MOUNTING
HOLES
M19916
MOUNTING
SCREWS (2)
WALL ANCHORS (2)
WIRES THROUGH WALL
AND WIRE SLOT
Figure 3. Install Wallplate
4. Remove the wallplate from the wall and drill
two 3/16 inch holes in in the wall (if drywall) as
marked. For firmer material such as plaster,
drill two 7/32 inches holes. Tap the wall an-
chors (provided) into the drilled holes until
flush with the wall.
5. Pull the wires through the wire hole on the
wallplate and position the wallplate over the
wall anchors.
6. Insert the mounting screws into the wall an-
chors and tighten.
Wiring
IMPORTANT
− All wiring must agree with applicable codes, ordi-
nances and regulations
− Use 18 gauge thermostat wire. Shielded cable is
not required.
NOTES −
− Sensor wires must have a cable separate from
the thermostat control cable.
− Refer to Table 2 for terminal designation descrip-
tions.
− See figure 7 through 10 for wiring diagrams from
specific equipment applications.
1. Select conventional set of terminal identifica-
tions which correspond to the system type
(conventional or heat pump (see figure 4).
Lennox commercial equipment does not use
the heat pump system terminals.
S1
S2
Y2
W1
RC
C
Y2
L
A
W2
S1
S2
HEAT PUMP
CONVENTIONAL
L
A
RC
R
W
Y
G
C
SCREW
TERMINALS
R
O/B
Y
G
Figure 4. Terminal Identifications for System
Type
2. Loosen screw terminals used for the applica-
tion.
3. Insert the wires into the terminal block and
tighten each screw terminal (see figure 5).
M19917
Figure 5. Insert Wires into Terminal Block
4. Push excess wire back into the wall opening
and restrict wires to the shaded area (see fig-
ure 6).
5. Plug the wall opening with non−flammable in-
sulation to prevent drafts from affecting the
thermostat.