Honeywell CT8611 User Manual
CT8611
PROGRAMMABLE
HEAT PUMP THERMOSTAT
INSTALLATION MANUAL
IMPORTANT:
before or after installation. Refer to Owner’s Guide,
form 69-0398, for programming instructions.
12-93 • Form Number 69-0816
This thermostat may be programmed either
1 69-0816
Toll-free Customer Assistance
For all questions concerning this thermostat, please read and follow the instructions. If additional
assistance is needed, call Honeywell Customer Assistance toll-free at 1-800-468-1502, Monday-Friday,
7:00 a.m.-5:30 p.m. Central Time.
Before you call, please have the following information available—thermostat model number and date
code, kind of heating/cooling system (i.e., hot water, warm air, oil, gas, etc.), number of wires connected to
the thermostat.
This equipment is a Class B digital apparatus, which complies with Canadian Radio Interference
NOTICE
Regulations, CRC c. 1374.
2
1
PREPARATION
Your new thermostat provides energy saving
control for a 24 Vac multistage heat pump heating/
cooling system direct from the control transformer.
The CT8611 includes SYSTEM and ENRG SAV
LEDs located near the top of the thermostat face.
The SYSTEM LED lights when the thermostat is
signaling for heating or cooling. The ENRG SAV
LED lights during the LEAVE and SLEEP periods.
The CT8611 also includes AUX. HT. and EM.
HT. LEDs near the bottom center of the subbase.
The AUX. HT. LED lights whenever the thermostat
is calling for operation of the backup or auxiliary
heater. Backup (auxiliary) heat is more expensive
to operate than the heat pump and typically is used
only when the heat pump is unable to handle the
heating load. The EM. HT. LED lights whenever the
thermostat system switch is in the EM. HT. position.
Heat and cool anticipation is fixed in all models;
no adjustment is necessary. Cycle rates are adjustable for auxiliary heating stage.
Any questions concerning your system’s compatibility with your thermostat may be directed to
Honeywell Customer Assistance at their toll-free
number, 1-800-468-1502.
WARNING
This device is designed to operate on low
voltage (20 to 30 Vac). The application of
higher voltage is dangerous and may cause
electrical shock, fire or personal injury.
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to
follow them could damage the product or cause a
hazardous condition.
2. Check the CT8611 Heat Pump Thermostat
Wiring Guide, form 69-0817, to make sure the product is suitable for your application.
3. Allow thermostat to warm to room temperature before operating.
4. After installation is complete, check thermostat operation as provided in these instructions.
3 69-0816
TOOLS REQUIRED FOR INSTALLATION
Assemble a flat blade screwdriver and other
tools as needed (right).
Test to make certain that your heating and
cooling systems are working properly. If either
does not work, contact your local heating/air conditioning dealer. To avoid compressor damage, do
not operate the cooling system if outdoor temperature is below 50° F [10° C].
TURN OFF POWER to the system at the heat
pump and at the fuse/circuit breaker panel.
Carefully unpack your new thermostat. Save
instructions, proof of purchase from packaging and original receipt.
FLAT BLADE
SCREWDRIVER
WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED TO STRIP WIRES
SPIRIT LEVEL, IF NEEDED TO LEVEL
THERMOSTAT FOR APPEARANCE
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL
MASKING TAPE, IF NEEDED
TO LABEL WIRES AS THEY
ARE DISCONNECTED FROM
OLD THERMOSTAT
M849
4
REMOVE OLD THERMOSTAT
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WARNING
If your old thermostat is attached to a
junction box in the wall, it is likely that
120V are present. To prevent electrical
shock hazard,
fied electrician.
do not proceed
. Call a quali-
Disconnect wires from old thermostat or sub
base. Always label all wires as you disconnect
them from your old thermostat. Use the CT8611 Wire
Tags provided to label each wire with the appropriate
terminal designation as you remove it. It is important
to note the terminal designation when removing wires.
Not all thermostats are wired by color code.
Keep the wires from falling back into the wall
by wrapping them around a pencil, as shown.
CAUTION
1. Disconnect power supply to prevent
electrical shock or equipment damage.
2. After wiring is complete, push excess
wire back into the hole, and plug hole
with nonhardening caulk, putty, or insulation to prevent drafts from affecting
thermostat operation.
Remove cover from old thermostat. If it doesn’t
snap off when pulled firmly from the bottom,
check for a screw that locks the cover.
Loosen screws holding thermostat to subbase,
wallplate or wall, and lift away.
WIRES THROUGH
WALL OPENING
M5136
5 69-0816
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