Page 1
Installation
Guide
TH3110D
Non-programmable Digital Thermostat
Page 2
Product Application
This thermostat provides electronic control of 24 VAC single-stage heating and cooling systems, or 750 mV heating systems.
System Types
• Gas, oil, or electric heat with air
conditioning
• Warm air, hot water, high-efficiency
furnaces, heat pumps, steam, gravity
• Heat only
• Heat only with fan
• Cool only
• 750 mV heating systems
Power Type
• Battery power
• Common wire
• Common wire with battery backup
System Settings
• Heat, Off, Cool
Fan Settings
• Auto, On
Must be installed by a trained, experienced technician
• Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.
• Check the ratings in this booklet to verify that this product is suitable for your
application (see page 12).
• Always test for proper operation after installation (see pages 8-9).
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before
beginning installation.
MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed tube, do not
place the old control in the trash. Contact your local waste management authority for
instructions regarding recycling and proper disposal.
® U.S. Registered Trademark. Patents pending.
Copyright © 2005 Honeywell International Inc. All rights reserved.
Page 3
PRO TH3110D Non-programmable Digital Thermostat
Table of contents
IInnssttaallllaattiioonn
Pre-installation checklist ................2
Wallplate installation ......................3
Wiring..............................................4
Wiring diagrams ..............................5
IInnssttaalllleerr SSeettuupp
Fan operation settings ....................6
Battery installation ..........................7
Thermostat mounting ....................7
Installer setup..................................8
Installer system test ........................8
Installation tips
Install the thermostat about 5 feet (1.5m) above the floor in an area
with good air circulation at average temperature.
Appppeennddiicceess
A
Quick reference to controls..........10
Quick reference to display ............10
Compressor protection ................10
In case of difficulty ......................11
Accessories....................................12
Specifications ................................12
NO
NO
Do not install in locations where the thermostat can be affected by:
• Drafts or dead spots behind doors and in corners
• Hot or cold air from ducts
• Sunlight or radiant heat from appliances
• Concealed pipes or chimneys
• Unheated/uncooled areas such as an outside wall behind the thermostat
NO
1
Page 4
Installation Guide
Pre-installation checklist
Package contents
Check to make sure your package includes the following items:
• PRO TH3110D digital thermostat (wallplate attached to back)
• Operating manual
• Wall anchors and mounting screws (2 each)
• AA alkaline batteries (2)
Required tools & supplies
• No. 2 Phillips screwdriver
• Small pocket screwdriver
• Drill
• Drill bit (3/16” for drywall, 7/32” for plaster)
• Hammer
• Pencil
• Electrical tape
• Level (optional)
2
Page 5
PRO TH3110D Non-programmable Digital Thermostat
Wallplate installation
Grasp top and bottom of wallplate
and pull to remove from thermostat.
Remove the wallplate from the thermostat as shown at left, then follow
directions below for mounting.
1 Pull wires through wire hole.
2 Position wallplate on wall, level and
mark hole positions with pencil.
3 Drill holes at marked positions as
shown below, then tap in
supplied wall anchors.
4 Place wallplate over anchors, insert
and tighten mounting screws.
Drill 3/16” holes for drywall.
Drill 7/32” holes for plaster.
Wall anchors
Mounting screwsWire hole
3
Page 6
Installation Guide
Wiring
CAUTION: ELECTRICAL HAZARD. Can cause electrical shock or equipment damage.
Disconnect power before wiring.
Keep wires in this
shaded area
Terminal
block
Jumper
Wiring
1 Loosen screw terminals, insert
wires into terminal block, then retighten screws.
2 Push excess wire back into the
wall opening. Keep wires in shaded
area as shown at left.
3 Plug the wall opening with non-
flammable insulation to prevent
drafts from affecting thermostat
operation.
Terminal Designations
W
W
Heat relay.
NOTES
R & Rc terminals
In single-transformer system, leave metal
jumper in place between R & Rc. Remove
metal jumper if two-transformer system.
Heat pump systems
If wiring to a heat pump, use a small piece of
wire (not supplied) to connect terminals W
and Y.
C terminal
The C (common wire) terminal is optional
when thermostat is powered by batteries.
Wire specifications
Use 18- to 22-gauge thermostat wire.
Shielded cable is not required.
Y
Y
Compressor contactor.
G
G
Fan relay.
O
O
Heat pump changeover valve energized in cooling.
Rcc
R
Cooling power. Connect to
secondary side of cooling
system transformer.
R
R
Heating power. Connect to
secondary side of heating
system transformer.
B
B
Heat pump changeover valve energized in heating.
C
C
Common wire from secondary side
of cooling system transformer.
4
Page 7
PRO TH3110D Non-programmable Digital Thermostat
Wiring diagrams
1 Power supply. Provide disconnect means and overload protection as required.
2 Factory-installed jumper. Remove for 2-transformer systems only.
3 Use either O or B terminals for changeover valve.
4 Use a small piece of wire (not supplied) to connect W and Y terminals.
5 Set fan operation switch to Heat Pump (see page 6) and configure for heat pump (see pg. 8).
6 Optional 24 VAC common connection.
Typical 1H/1C system: 1 transformer Typical 1H/1C system: 2 transformers
Typical 1H/1C heat pump system Typical heat-only system
Typical heat-only system with fan Typical cool-only system
Remove jumper
5
Page 8
Installation Guide
Fan operation settings
Gaass oorr OOiill::
G
•
For gas or oil heating
systems, leave the fan operation
switch in this factory-set position
(This setting is for systems that
control the fan in a call for heat.)
Elleeccttrriicc oorr HHeeaatt PPuummpp::
E
•
Change the
switch to this setting for heat
pump or electric heat systems.
(This setting is for systems that
allow the thermostat to control the
fan in a call for heat, if a fan wire is
G
connected to the
G
terminal.)
Set fan operation switch
6
Page 9
PRO TH3110D Non-programmable Digital Thermostat
Power options & mounting
AC Power
The thermostat can be powered by 24
VAC power, or by batteries.
To wire the thermostat for AC power,
Connect common
side of transformer
to “C” terminal
connect the common side of the
cooling transformer to the “C” terminal
as shown at left.
I
Immppoorrttaanntt::
2-transformer systems only. (See wiring
diagram on page 5.)
Remove R/Rc jumper for
Install batteries in back of thermostat
(optional if AC powered).
Battery Power
The thermostat can be powered by
batteries alone or, if used with AC
power, can provide backup power to
the display during power interruptions.
To Mount Thermostat
Align the 4 tabs on the wallplate with
corresponding slots on the back of the
thermostat, then push gently until the
thermostat snaps in place.
7
Page 10
Installation Guide
Installer setup
Follow the procedure below to configure the thermostat to match the installed
heating/cooling system, and customize feature operation as desired.
Press and hold both buttons
Function
number
To begin, pr
buttons until the display changes
ess and hold the and
Press to change settings
Press to advance to next function
Pr
Setup Function Settings & Options
Setting
Setup
0
1
ess and hold to exit and save settings
1
System type
5
Heating cycle rate
(CPH: cycles/hour)
9
Compressor
cycle rate (CPH)
14
Temperature
display
15
Compressor
protection
0 Gas, oil or electric heat with air conditioning
1 Heat pump (5 minute compressor off time in heating and cooling)
5 For gas or oil furnaces of less than 90% efficiency
1 For steam or gravity systems
3 For hot water systems & furnaces of over 90% efficiency
9 For electric furnaces
[Other cycle rate options: 2, 4, 6, 7, 8, 10, 11 or 12 CPH]
3 Recommended for most compressors
[Other cycle rate options: 1, 2, 4, 5 or 6 CPH]
0 Fahrenheit
1 Celsius
5 Five-minute compressor off time
[Other options: 0, 1, 2, 3 or 4-minute off time]
**See page 10
Installer system test
After completing the installer setup above, press the button again to begin a
system test (see next page).
8
Page 11
PRO TH3110D Non-programmable Digital Thermostat
Installer system test
Follow the procedure below to test the heating and cooling system.
System test
number
System status
0
10
System switch
S
1 Set
2 Press to turn on cooling system, then check system status (see table, below).
3 Press to turn off cooling system.
4 Set
5 Press to turn on heating system, then check system status (see table, below).
SYYSSTTEEMM
S
SYYSSTTEEMM
switch to Cool
switch to Heat
.
.
Test
6 Press to turn off heating system.
S
7 [Optional] Set
Press to display 71-76.
ess and hold to terminate system test at any time.
8Pr
SYYSSTTEEMM
switch to Of
f to display thermostat information (see table, below).
System Test System Status
10
Heating system
30
Cooling system
70
Thermostat
information
(for reference only)
0 Heat and fan turn off.
1 Heat turns on. Fan also turns on immediately if Fan Operation
Switch is set to Electric Heat/Heat Pump
0 Compressor and fan turn off.
1 Compressor and fan turn on.
71 Software revision number (major revisions)
72 Software revision number (minor revisions)
73 Configuration identification code (major)
74 Configuration identification code (minor)
75 Production configuration date code (week)
76 Production configuration date code (year)
(see page 6).
CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection (minimum off time) is bypassed during testing. To prevent
equipment damage, avoid cycling the compressor quickly.
9
Page 12
Installation Guide
Quick reference to controls
Digital display screen Temperature buttons
Press to adjust temperature
settings
System switch
• Cool: Thermostat controls only
the cooling system.
• Heat: Thermostat controls only
the heating system.
Fan switch
On: Fan runs continuously.
Auto: Fan runs only when heating
or cooling system is on.
• Off: Heating and cooling
systems are off.
Quick reference to display screen
Current inside temperature
Low battery warning
Inside Set To
°
75
75
Replace Batt
Heat On
Cool On
°
Temperature setting
System status
On when “calling” for
heating or cooling;
flashes when waiting for
compressor restart
Built-in compressor protection (Setup Function 15)
This feature helps prevent damage to the
Inside Set To
°
°
compressor in the air conditioning or heat
pump system.
75
75
Cool On
Damage can occur if the compressor is restarted too soon after shutdown.This feature
forces the compressor to wait for a few minutes before restarting.
Message flashes until safe
restart time has elapsed
During the wait time, the message Cool On
(or Heat On if you have a heat pump) will
flash on the display.When the safe wait time
has elapsed, the message stops flashing and
the compressor turns on.
10
Page 13
PRO TH3110D Non-programmable Digital Thermostat
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below. Most
problems can be corrected quickly and easily.
Display is blank • Check circuit breaker and reset if necessary.
• Make sure heating & cooling power switches are on.
• Make sure equipment door is securely closed.
• If battery powered, make sure fresh AA alkaline batteries are installed.
Temperature
settings do not
change
Heating system
does not respond
(“Heat On”
appears on
screen)
Cooling system
does not respond
(“Cool On”
appears on
screen)
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
• Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the
heating equipment to find the cause of the problem.
• Check for 24 Vac between the heat terminal (W) and the transformer
common. If 24 Vac is present, the thermostat is functional. Check the
heating equipment to find the cause of the problem.
• Check for loose or broken wires between the thermostat and the heating
equipment.
• Check for 24 Vac at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the
cooling equipment to find the cause of the problem
• Check for 24 Vac between the cooling terminal (Y) and the transformer
common. If 24 Vac is present, the thermostat is functional. Check the
cooling system to find the cause of the problem.
Fan does not
turn on in a
call for heat
“Cool On” or
“Heat On”
is flashing
“Heat On” is
not displayed
“Cool On” is
not displayed
• Check for loose or broken wires between the thermostat and the cooling
equipment.
• Make sure the Fan Operation switch is set to the proper system.
• Compressor protection timeout is engaged. Wait 5 minutes for the
system to restart safely, without damage to the compressor.
• Set the System switch to Heat
current room temperature.
• Set the System switch to Cool
current room temperature.
, and set the temperature level above the
, and set the temperature level below the
11
Page 14
Installation Guide
Accessories
Please contact your distributor to order accessories.
Cover plate assembly ............................................Part Number 50002883-001
(Used to cover marks left by old thermostats.)
Specifications
Temperature Ranges
• Heat: 40° to 90°F (4.5° to 32°C)
• Cool: 50° to 99°F (10° to 37°C)
Operating Ambient Temperature
• 32° to 120°F (0° to 48.9°C)
Shipping Temperature
• -20° to 120°F (-28.9° to 48.9°C)
Operating Relative Humidity
• 5% to 90% (non-condensing)
Physical Dimensions
• 3-13/16” H x 5-3/8” W x 1-1/4” D
• 97 mm H x 137 mm W x 32 mm D
Electrical Ratings
System Voltage (50/60Hz) Running Current
Heating 20-30 Vac 0.02-1.0 A
(Powerpile) 750 mV DC 100 mA DC
Cooling 20-30 Vac 0.02-1.0 A
12
Page 15
Page 16
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario M1V 4Z9
http://yourhome.honeywell.com
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
® U.S. Registered Trademark.
© 2005 Honeywell International Inc.
Patents pending. All rights reserved.
69-1846 • 06-2005
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