3 69-0816
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 adjust-
able for auxiliary heating stage.
Any questions concerning your system’s com-
patibility 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 prod-
uct is suitable for your application.
3. Allow thermostat to warm to room tempera-
ture before operating.
4. After installation is complete, check thermo-
stat operation as provided in these instructions.
1PREPARATION