Honeywell TH8110U User Manual
TH8110U Touch Screen
Programmable Thermostats
INSTALLATION INSTRUCTIONS
APPLICATION
The TH8110U Universal Programmable Thermostats provide electronic control of 24 Vac heating and cooling systems
or 750 mV heating system. See Table 1 for a general description.
Table 1. TH811 Thermostats Description.
Model
TH8110U Batteries or
RECYCLE NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of the old control.
INSTALLATION
Power
Method Changeover System Selection Fan Selection Comments
common wire
Automatic or
manual
selectable
Heat-Off-Cool-Auto On-Auto-Circ System and Fan
NO
NO
selection vary based on
system type
NO
YES
5 FEET
[1.5 METERS]
When Installing this Product...
1. Read these instructions carefully. Failure to follow
the instructions can damage the product or cause
a hazardous condition.
2. Check the ratings given in the instructions to make
sure the product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out the product operation.
Selecting Location
Install the thermostat about 5 ft. (1.5m) above the floor in
an area with good air circulation at average temperature.
See Fig. 1.
® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc. • • All Rights Reserved
Do not install the thermostat where it can be affected by:
— Drafts or dead spots behind doors and in corners.
— Hot or cold air from ducts.
— Radiant heat from sun or appliances.
— Concealed pipes and chimneys.
— Unheated (uncooled) areas such as an outside wall
behind the thermostat.
M19925
Fig. 1. Selecting thermostat location.
69-1700
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CO
L
SC
S
H
UMP
S1
2
C
G
C
Installing Wallplate
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before wiring.
The thermostat can be mounted horizontally on the wall
or on a 4 in. x 2 in. (101.6 mm x 50.8 mm) wiring box.
1. Position and level the wallplate (for appearance
only).
2. Use a pencil to mark the mounting holes.
WALL
WIRES THROUGH WALL
AND WIRE SLOT
WALL ANCHORS (2)
MOUNTING
HOLES
MOUNTING
SCREWS (2)
Fig. 2. Mounting wallplate.
3. Remove the wallplate from the wall and, if drywall,
drill two 3/16-in. holes in the wall, as marked. For
firmer material such as plaster, drill two 7/32-in.
holes. Gently tap anchors (provided) into the drilled
holes until flush with the wall.
4. Position the wallplate over the holes, pulling wires
through the wiring opening. See Fig. 2.
5. Insert the mounting screws into the holes and
tighten.
M19916
3. Securely tighten each screw.
4. Push excess wire back into the hole.
5. Plug the hole with nonflammable insulation to
prevent drafts from affecting the thermostat.
EAT P
NVENTIONA
Y2
L
E
AUX
S1
S2
Fig. 3. Selecting terminal identifications for
Table 2. Selecting Terminal Identifications for
W2
S
system type.
System Type.
System Type
R
W
Y
REW TERMINAL
Wallplate
Terminal
Identifications
RC
R
O/B
Y
G
C
M19951
Wiring
Diagram
Reference
Standard Heat/Cool Conventional 5, 6
Heat Only Conventional 7
Heat Only with Fan Conventional 8
Heat Only Series 20 Conventional 9
Cool Only Conventional 10
Heat Pump with No
Auxiliary Heat
Heat Pump 11
WIRING (FIG. 5-11)
All wiring must comply with local electrical codes and
ordinances.
1. Select set of terminal identifications (Table 2) that
corresponds with system type (conventional or
heat pump) in Fig. 3.
2. Loosen the screws for the appropriate system type
selected; see Table 2. Insert wires in the terminal
block under the loosened screw. See Fig. 4.
69-1700 2
Fig. 4. Inserting wires in terminal block.
IMPORTANT
Use 18 gauge thermostat wire.
M19917
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CONVENTIONAL
RC
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 5. Typical hookup of conventional single-stage
heat and cool system with single transformer
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
REMOVE FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
2
R
W
Y
G
C
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
(1H/1C conventional).
CONVENTIONAL
RC
2
R
W
Y
G
C
CONNECTION
FAN
RELAY
COMPRESSOR
CONTACTOR
HEAT RELAY
OPTIONAL
24 VAC
COMMON
OPTIONAL
24 VAC
COMMON
M19895
M19896
CONVENTIONAL
RC
1
R
C
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 7. Typical hookup of heat-only system
Y2
1
R
C
1
C
R
OUTDOOR/INDOOR
1
2
3
W2
S1
S2
3
TEMPERATURE
SENSOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
FACTORY INSTALLED JUMPER.
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 8. Typical hookup of heat only system with fan
2
R
W
Y
G
C
HEAT RELAY
(1H conventional).
CONVENTIONAL
RC
2
R
W
Y
G
C
FAN
RELAY
HEAT RELAY
(1H conventional).
CONNECTION
OPTIONAL
24 VAC
COMMON
OPTIONAL
24 VAC
COMMON
CONNECTION
1
R
C
M19897
1
R
C
M19898
Fig. 6. Typical hookup of conventional single-stage
heat and cool system with two transformers
(1H/1C conventional).
3 69-1700
TH8110U TOUCH SCREEN PROGRAMMABLE THERMOSTATS
CONVENTIONAL
RC
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
2
R
W
Y
G
C
W BR
SERIES 20
MOTOR OR
TR
TR
1
VALVE
M19899
Fig. 9. Typical hookup of heat only Series 20 system.
HEAT PUMP
Y2
L
E
AUX
S1
S2
4
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
FACTORY INSTALLED JUMPER.
2
"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS.
4
WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.
R
C
CONVENTIONAL
RC
Y2
W2
S1
S2
3
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
3
OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE
ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
Fig. 10. Typical hookup of cool only system
RC
2
R
O/B
3
2
R
W
Y
G
C
FAN
RELAY
COMPRESSOR
CONTACTOR
(1C conventional).
1
OPTIONAL
CONNECTION
R
C
Y
G
OPTIONAL
24 VAC
C
COMMON
CONNECTION
FAN RELAY
CHANGEOVER
VALVE
COMPRESSOR
24 VAC
COMMON
M19903
1
R
C
M19900
Fig. 11. Typical hookup of single-stage heat pump with no auxiliary/backup heat (1H/1C heat pump).
Powering the Thermostat
There are two different ways to power the thermostat:
• Batteries (three AAA alkaline).
• 24 Vac Common wire.
Wiring 24 Vac Common
Wire the common side of the transformer to the C screw
of the thermostat wallplate. When installing in a single
transformer system, keep jumper wire between the R
and Rc screws. When installed in a two-transformer
69-1700 4
system, use the common from the cooling transformer to
connect to C screw and remove the jumper wire between
the R and Rc screws.
Inserting Batteries (Optional)
If not using a 24 Vac Common to power the thermostat,
install three AAA alkaline batteries (included) in the back
of the thermostat. Make sure the positive and negative
terminals are oriented correctly, as marked on the device.
See Fig.12.
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