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X-XX UL

INSTALLATION INSTRUCTIONS

Microelectronic

Heat Pump Thermostats

T8511G

APPLICATION

The T8511G Microelectronic Heat Pump Thermostat provides electronic control of 24 Vac, two-stage heating and one-

stage cooling heat pump systems. Refer to Table 1 for a general description of the thermostat. All T8511 Thermostats

require a common wire to supply power.

Table 1. T8511 Thermostat Desription.

MERCURY NOTICE

If this control is replacing a control that contains

mercury in a sealed tube, do

not

place your old

control in the trash.

Contact your local waste management authority for

instructions regarding recycling and the proper

disposal of the old thermostat.

INSTALLATION

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 and on

the product 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.

CAUTION

Electrical Shock or Equipment Damage Hazard.

Can shock individuals or short equipment

circuitry.

Disconnect power supply before installation.

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.

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.

Wallplate Installation

Mount tthermostat horizontally on the wall or on a 2 in. x 4

in. wiring box.

1. Position and level the wallplate (for appearance

only). The thermostat functions properly even when

not level.

T8511 Changeover System Selection

Fan

Selection Comments

G Automatic Em. Heat-Heat-Off-Auto-Cool On-Auto Use keyboard to make system and

fan selections.

69-0961-4

1 2 3 4 5 6 ... 11 12

Sommario

Pagina 1 - Heat Pump Thermostats

Pagina 2 - IMPORTANT

69-0961—410MICROELECTRONIC HEAT PUMP THERMOSTATTROUBLESHOOTING GUIDE (Continued)aAvailable on select models.Symptom Possible Cause ActionHeating will

Pagina 3 - Mounting Thermostat

69-0961—411MICROELECTRONIC HEAT PUMP THERMOSTAT

Pagina 4 - SETTINGS

Honeywell Limited-Honeywell Limitée35 Dynamic DriveScarorough, OntarioM1V 4Z969-0961—4 G.H. Rev. 05-04Automation and Control SolutionsHoneywell In

Pagina 5 - INSTALLER SETUP

69-0961—42MICROELECTRONIC HEAT PUMP THERMOSTATFig. 1. Typical location of thermostat.5 FEET[1.5 METERS]YESNONONOM10106Fig. 2. Mounting the wallplate.2

Pagina 6

69-0961—43MICROELECTRONIC HEAT PUMP THERMOSTATFig. 3. Typical hookup in heat pump application.Fig. 4. Typical hookup in heat pump systemwith emergency

Pagina 7 - INSTALLER SYSTEM-TEST

69-0961—44MICROELECTRONIC HEAT PUMP THERMOSTATFig. 10. T8511G (automatic changeover) systemand fan key locations.NOTE: Always press the system and fan

Pagina 8 - Thermostat Information

69-0961—45MICROELECTRONIC HEAT PUMP THERMOSTATINSTALLER SETUPNOTE: For most applications, the thermostat factorysettings do not need changing. Review

Pagina 9 - TROUBLESHOOTING GUIDE

69-0961—46MICROELECTRONIC HEAT PUMP THERMOSTATTable 2. Thermostat Installer Setup Options (Continued).Installer Setup Number(Press i keyFactory S

Pagina 10

69-0961—47MICROELECTRONIC HEAT PUMP THERMOSTATEm HeatOffCool Auto OnlyHeat CoolOnAutoSystem FanRoomOutdoorEm Ht Temporary SettingWait%HumidAux HtRemot

Pagina 11 - 69-0961—4

69-0961—48MICROELECTRONIC HEAT PUMP THERMOSTATTable 4. Installer System-Test Options (Continued).M6791M4864M4865M4866Thermostat Information1. Press th

Pagina 12 - 69-0961—4 G.H. Rev. 05-04

69-0961—49MICROELECTRONIC HEAT PUMP THERMOSTATM48675. Press the increase ▲ key again to display theEEPROM identification code (Example: 222 =EEPROM ID

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