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PRODUCT DATA

® U.S. Registered Trademark

T8112D

Programmable Thermostat

GENERAL

The T8112D Programmable Thermostat provides energy

savings for single-stage heating and cooling applications

while providing reliable, precise temperature control.

FEATURES

• HEAT-OFF-COOL System switch.

• AUTO-ON Fan switch.

• Separate programs for weekdays and weekends

(5 day/2 day).

• Digital LCD display.

• Easy to program and install.

• Precise temperature control.

• Four daily energy saving programs.

• Compatible with most 24 Vac standing pilot, gas

electronic ignition, oil or central electric systems.

• Requires two AA alkaline batteries.

• LCD flashes

bAt Lo

indicating low battery power.

• Isolated heating/cooling circuits.

Contents

General ............................................................................... 1

Features .............................................................................. 1

Specifications ...................................................................... 2

Ordering Information ........................................................... 2

Installation ........................................................................... 3

Programming the Thermostat ............................................. 6

Checkout and Settings ........................................................ 7

Troubleshooting ................................................................... 8

68-0206

1 2 3 4 5 6 7 8

Sommario

Pagina 1 - Programmable Thermostat

Pagina 2 - ORDERING INFORMATION

T8112D PROGRAMMABLE THERMOSTAT68-02062SPECIFICATIONSIMPORTANTThe specifications given in this publication do notinclude normal manufacturing tolerance

Pagina 3 - INSTALLATION

T8112D PROGRAMMABLE THERMOSTAT68-02063INSTALLATIONWhen Installing this Product…1. Read these instructions carefully. Failure to follow theinstructions

Pagina 4 - W Y G

T8112D PROGRAMMABLE THERMOSTAT68-02064Fig. 3. Proper wiring technique.M1712AJUMPER (FACTORY-INSTALLED) REMOVE IF 5-WIRE SYSTEMINSERTSTRAIGHT UNDER SCR

Pagina 5 - Install Batteries

T8112D PROGRAMMABLE THERMOSTAT68-02065Fig. 8. 5-wire heat/cool application (jumper removed).Adjust Fan Operation Switch, as RequiredThe thermostat fan

Pagina 6 - PROGRAMMING THE THERMOSTAT

T8112D PROGRAMMABLE THERMOSTAT68-02066Fig. 10. Removing battery door.M5781Fig. 11. Installing batteries.Mounting Thermostat 1. Engage the tabs at

Pagina 7 - System Switch

T8112D PROGRAMMABLE THERMOSTAT68-02067To check the current temperature setting:Press the Run Program key. (When using TEMPORARILYCHANGE or HOLD, press

Pagina 8 - TROUBLESHOOTING

T8112D PROGRAMMABLE THERMOSTAT68-02068Home and Building ControlHoneywell Limited-Honeywell Limitée155 Gordon Baker RoadNorth York, OntarioM2H 3N768-02

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