Honeywell PRO TH4000 Series Programmable Digital Thermostat User Guide

Honeywell PRO TH4000 Series Programmable Digital Thermostat

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Wallplate installation

Remove the wallplate from the thermostat by pulling from the bottom, then follow directions below for mounting.

Pull wires through wire hole.
Position wallplate on wall, level and mark hole positions with pencil.
Drill holes at marked positions as shown below, then tap in supplied wall anchors.
Place wallplate over anchors, insert and tighten mounting screws.
After the wallplate has been mounted, insert quick reference card in slot in front of wallplate.

Power options

Wiring terminal designations

TH4110D

C 24 Vac common. For 2-transformer systems, use common wire from cooling transformer.
B Changeover valve energized in heating
R 24 Vac power from heating transformer
Rc 24 Vac power from cooling transformer
O Changeover valve energized in cooling
G Fan relay
Y Compressor contactor
W Heat relay

TH4210D

C 24 Vac common
B Changeover valve energized in heating
R 24 Vac power
L Sends output when set to Em. Heat
O Changeover valve energized in cooling
G Fan relay
Y Compressor contactor
Aux Auxiliary heat relay
E Emergency heat relay

Wiring conventional and heat pump systems

C 24 Vac common [3]
B Changeover valve energized in heating [5]
R Power [1]
L Sends output when set to Em. Heat [8]
O Changeover valve energized in cooling [5]
G Fan relay
Y Compressor contactor
Aux Auxiliary heat relay [9]
E Emergency heat relay [9]

C 24 Vac common [3]
B Changeover valve energized in heating [5]
R [R+Rc joined by jumper]
Rc Power [1]
O Changeover valve energized in cooling [5]
G Fan relay
Y Compressor contactor [6]
W [W+Y joined by jumper]

C 24Vac common [3]
R [R+Rc joined by jumper]
Rc Power [1]
W Heat relay

C 24 Vac common [3, 4]
R Power (heating transformer) [1, 2]
Rc Power (cooling transformer) [1, 2]
G Fan relay
Y Compressor contactor
W Heat relay

C 24 Vac common [3]
R [R+Rc joined by jumper]
Rc Power [1]
G Fan relay
W Heat relay

C 24 Vac common [3]
R [R+Rc joined by jumper]
Rc Power [1]
G Fan relay
Y Compressor contactor

NOTES: Wire specifications:
Use 18- to 22-gauge thermostat wire. Shielded cable is not required.

Power supply. Provide disconnect means and overload protection as required.
Remove jumper for 2-transformer systems.
Optional 24 Vac common connection.
Common connection must come from cooling transformer.
Use either O or B terminals for changeover valve.
Use a small piece of wire (not supplied) to connect W and Y terminals.
Set fan operation switch to Heat Pump and configure system type for heat pump (see page 6).
L terminal sends a continuous output when thermostat is set to Em. Heat. Connect to Honeywell zoning panels to switch the panel to Emergency Heat.
Install field jumper between Aux and E if there is no emergency heat relay.

Fan operation settings

Gas or Oil: 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.)

Electric or Heat Pump: 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 connected to the G terminal.)

Thermostat mounting

Align the 4 tabs on the wallplate with corresponding slots on the back of the thermostat.
Push gently until the thermostat snaps in place.
Push excess wire back into the wall opening.
Plug wall opening with nonflammable insulation.

Installer Setup

Follow the procedure below to configure the thermostat to match the installed heating/cooling system, and customize feature operation as desired.
To begin, press and hold the s and t buttons until the display changes.

Press t to change settings.
Press s to advance to next function.
Press and hold ts to exit and save settings.

Installer system test

Set SYSTEM switch to Heat.
Press t to turn on and check systems (see table, below).
Press t until systems turn off.
Set SYSTEM switch to Em Heat and repeat steps 2-3 above (TH4210D only).
Set SYSTEM switch to Cool and repeat steps 2-3 above.
Press and hold ts to terminate test at any time.

Troubleshooting

If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.

Display is blank

Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
Make sure fresh AA alkaline batteries are correctly installed.

Heating or cooling system does not respond

Set system switch to Heat. Make sure the temperature is set higher than the Inside temperature.
Set system switch to Cool. Make sure the temperature is set lower than the Inside temperature.
Wait 5 minutes for the system to respond.

Temperature settings do not change
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).

“Cool On” or “Heat On” is flashing
Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor.

“Heat On” is not displayed
Set the System switch to Heat, and set the temperature level above the current room temperature.

“Cool On” is not displayed
Set the System switch to Cool, and set the temperature level below the current room temperature.

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
Heat (1st stage) 20-30 Vac 0.02-1.0 A
(Powerpile) 750 mV DC 100 mA DC
Emergency heat 20-30 Vac 0.02-1.0 A
Auxiliary heat 20-30 Vac 0.02-1.0 A
Cooling 20-30 Vac 0.02-1.0 A

Customer assistance

For assistance with this product, please visit customer.honeywell.com
Or call Honeywell Customer Care tollfree at 1-800-468-1502.

CAUTION: EQUIPMENT DAMAGE HAZARD

Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.

CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.

CAUTION: 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.

Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com

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Honeywell PRO TH4000 Series Programmable Digital Thermostat User Guide

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