Honeywell T8511G User Manual

X-XX UL
INSTALLATION INSTRUCTIONS
®U.S. Registered Trademark • • All Rights Reserved
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

Honeywell T8511G Specifications

General

Brand	Honeywell
Model	T8511G
Category	Thermostat
Language	English

Summary

APPLICATION

INSTALLATION

MERCURY NOTICE

Information on recycling and proper disposal of old mercury thermostats.

ELECTRICAL SAFETY CAUTION

Warning about electrical shock and equipment damage during installation.

THERMOSTAT LOCATION

Guidance on selecting an optimal location for thermostat installation.

WALLPLATE INSTALLATION

Instructions for correctly mounting the thermostat wallplate.

WIRING

WIRING CAUTION

Warning concerning electrical shock and potential equipment damage.

WIRING IMPORTANT NOTES

Key considerations for proper thermostat wiring connections.

MOUNTING THERMOSTAT

Steps for attaching the thermostat to the installed wallplate.

SETTINGS

SYSTEM AND FAN SETTINGS

Configuration options for system operation and fan control modes.

TEMPERATURE SETTINGS

Adjusting heating and cooling setpoint temperatures.

USING THERMOSTAT KEYS

INSTALLER SETUP

THERMOSTAT INSTALLER SETUP OPTIONS

Table detailing configurable installer setup options and their functions.

INSTALLER SYSTEM-TEST

SYSTEM-TEST CAUTION

Warning regarding potential equipment damage during system testing.

THERMOSTAT INFORMATION

Accessing and displaying thermostat production and software details.

TROUBLESHOOTING GUIDE

CHECKOUT PROCEDURE

Post-installation checks to verify thermostat and system operation.

OUTDOOR TEMPERATURE SENSOR CHECK

Verifying accurate readings from the outdoor temperature sensor.