TH5110D NON-PROGRAMMABLE THERMOSTAT
3 69-1712—1
WIRINGAll wiring must comply with local electrical codes and
ordinances. Refer to Table 2 for descriptions of terminal
designations. See Fig. 6-13 for wiring diagrams for
specific equipment applications.
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before wiring.
IMPORTANT
Use 18-22 gauge thermostat wire. Shielded
cable is not required.
1. Loosen the screw terminals that are used for the
application. Insert the wires into the terminal block
and tighten each screw terminal. See Fig. 4.
Fig. 4. Insert wires into terminal block.
2. Push excess wire back into the wall opening and
restrict wires to the shaded area. See Fig. 5.
Fig. 5. Restrict wires to shaded area of wire hole.
3. Plug the wall opening with nonflammable insulation
to prevent drafts from affecting the thermostat.
NOTES:
1. When used in a single-transformer system, leave metal jumper in place between Rc and R. If used on a
two-transformer system, remove metal jumper between Rc and R.
2. Common wire is optional when thermostat is used with batteries.
3. If thermostat is configured for a heat pump in the Installer Setup, configure changeover valve
for cool (O-factory setting) or heat (B).
G
O/B W
Y
C
R
M22141
RC
G
W/O/B
Y
R
RC
WALLPLATE
SCREW TERMINALS
TERMINAL BLOCK
WIRES
LETTER
DESIGNATIONS
WALLPLATE
M22142
SHADED AREA
WIRE
G
W
Y
C
R
Rc
WALL OPENING
(O/B)
Table 2. Terminal designation descriptions.
Terminal
Designation Description
Rc (see Note 1) Power for cooling—connect to secondary side of cooling system transformer
R (see Note 1) Power for heating—connect to secondary side of heating system transformer
Y Compressor contactor
C (see Note 2) Common wire from secondary side of cooling system transformer
O/B W (see Note 3) Heat relay or changeover valve terminal for heat pumps
GFan relay