Honeywell Honeywell Thermostat T8511G User's Manual
X-XX UL
INSTALLATION INSTRUCTIONS
®U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc.
All Rights Reserved
T8511G,R Microelectronic
Heat Pump Thermostats
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.
Table 1. Description of T8511 Thermostats.
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.
T8511
Changeover
System Selection
Fan
Selection
Comments
G
Automatic
Em. Heat-Heat-Off-Auto-Cool
On-Auto
System and fan selections are by keyboard.
R
Manual
Em. Heat-Heat-Off-Cool
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.
69-0927-4
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