Table of Contents
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APPLICATION
The T8511 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.
T8511
Changeover
G
Automatic
R
Manual
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do
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.
®U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc.
All Rights Reserved
T8511G,R Microelectronic
Table 1. Description of T8511 Thermostats.
System Selection
Em. Heat-Heat-Off-Auto-Cool On-Auto
Em. Heat-Heat-Off-Cool
not
place your old
Heat Pump Thermostats
Fan
Selection
System and fan selections are by keyboard.
On-Auto
System and fan selections are by switches.
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
The thermostat can be mounted horizontally on the wall or
on a 2 in. x 4 in. wiring box. Position wallplate 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 will function properly even
when not level.
X-XX UL
INSTALLATION INSTRUCTIONS
Comments
69-0927-4
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Table of Contents
Related Manuals for Honeywell Tradeline T8511G
Summary of Contents for Honeywell Tradeline T8511G
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Page 1: Wallplate Installation
2 in. x 4 in. wiring box. to check out the product operation. 1. Position and level the wallplate (for appearance only). The thermostat will function properly even when not level. ®U.S. Registered Trademark Copyright © 2004 Honeywell International Inc. All Rights Reserved 69-0927-4 X-XX UL... - Page 2 T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS 5 FEET [1.5 METERS] M10106 Fig. 1. Typical location of thermostat. WALL 4. Position the wallplate over the holes, pulling wires through the wiring opening. 5. Loosely insert the mounting screws into the holes. WIRES THROUGH WALL 6.
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Page 3: Mounting Thermostat
T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS THERMOSTAT THERMOSTAT OUTDOOR OUTDOOR TEMPERATURE TEMPERATURE SENSOR SENSOR EM. HEAT RELAY HEAT EQUIPMENT RELAY 2 COMPRESSOR COMPRESSOR MONITOR CONTACTOR CONTACTOR EQUIPMENT MONITOR RELAY RELAY COOL COOL/HEAT CHANGEOVER CHANGEOVER VALVE VALVE HEAT HEAT CHANGEOVER RELAY 1 VALVE (HOT) (HOT) -
Page 4: Using Thermostat Keys
T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE. Heat: The thermostat controls the heating. Off: Both the heating and cooling are off. Cool: The thermostat controls the cooling. Auto: The thermostat automatically changes between heating and cooling operation, depending on the indoor temperature. -
Page 5: Installer Setup
T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS INSTALLER SETUP Em Ht Temporary Setting Remote Aux Ht Room NOTE: For most applications, the thermostat factory- %Humid settings do not need to be changed. Review the factory settings in Table 2 and if no changes are Outdoor Repl necessary, go to the Installer System-Test... - Page 6 T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS Table 2. Thermostat Installer Setup Options (Continued). Installer Setup Other Choices Number Factory-Setting (Press key to change) (Press i key Actual to change) Select Display Description Display Description Setting Extended fan No extended fan Fan operation is extended operation in operation after the call 90 seconds after the call for...
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Page 7: Installer System-Test
T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS NOTE: Press and hold the increase and decrease INSTALLER SYSTEM-TEST keys for three seconds to exit the system-test. The system-test times out after five minutes Use the Installer System-Test to check the thermostat without any key presses. configurations and operation. -
Page 8: Thermostat Information
T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS Table 4. Installer System-Test Options. (Continued) Key To Test Press Number Description Fan Equipment System-Test (T8511G only) Change from cooling to fan equipment system-test. Fan comes on. Fan turns off. T8511G System Key or T8511R System Switch Operation System-Test IMPORTANT Test numbers will only be displayed when the system is configured for the selected function. -
Page 9: Troubleshooting Guide
T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS 5. Press the increase key again to display the CHECKOUT EEPROM identification code. (Example: 222 = EEPROM ID 222) Outdoor Temperature Sensor (Where Applicable) Allow the outdoor temperature sensor to soak in the outdoor air for a minimum of five minutes before taking a reading. - Page 10 T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS TROUBLESHOOTING GUIDE (Continued) Symptom Possible Cause Action Heating will not Thermostat minimum off time is Wait up to five minutes for the system to respond. come on. activated. (Continued) System selection is not set to Set system selection to Heat.
- Page 11 T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS 69-0927—4...
- Page 12 T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarorough, Ontario M1V 4Z9 69-0927—4 69-0927—4 G.H. Rev. 04-04 www.honeywell.com/yourhome...