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Honeywell T8000C Installation Instructions Manual

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APPLICATION
The T8000C Thermostat provides single-stage, program-
mable temperature control for 24 Vac heating-cooling
systems with manual changeover from heat to cool.
Heating cycle rate is selectable at 1, 3, 4, 5, 6, 9, or 12
cph. Cooling cycle rate is fixed at 3 cph. Temperature
indication can be set for °F or °C.
The T8000C Thermostat is powered through the heating/
cooling system controls. Batteries are not required
because setpoints are held permanently by non-volatile
memory.
The T8000C model includes a thermostat, wallplate and
owner's guide. A 7-3/8 in. (188 mm) x 5-3/4 in. (146 mm)
decorator cover plate (for covering wall marks) is available
separately. Order Honeywell part no. 209649A (taupe) or
part no. 209649B (white).
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. Dispose of it properly.
Contact your local waste management authority for
instructions regarding recycling and the proper
disposal of a control.
Model
System
T8000C
Heat-Cool
®U.S. Registered Trademark
Copyright © 2002 Honeywell •

Programmable Thermostat

Table 1. Description of T8000C Thermostats.
Changeover
System Selection
Manual
Cool-Off-Heat
• All Rights Reserved
INSTALLATION INSTRUCTIONS
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous 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 installation is complete, check out product
operation as provided in these instructions.
CAUTION
Hazardous Voltage.
Can damage heating/cooling system.
Disconnect power at furnace or main breaker/fuse
box.
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 the sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall
behind the thermostat.
Fan Selection
Auto-On
X-XX UL
T8000C
Powering Method
Power Stealing
69-1434-1

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  Summary of Contents for Honeywell T8000C

  • Page 1: Programmable Thermostat

    °F or °C. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for The T8000C Thermostat is powered through the heating/ your application. cooling system controls. Batteries are not required 3.
  • Page 2: Wiring

    A letter code is located near each terminal for Mount wallplate and the T8000C with the screws provided identification. See Fig. 3. (see Fig. 2) as follows: 1.
  • Page 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT PUMP SYSTEMS. JUMPER R TO Rc. M12561 Fig. 5. Typical hookup of T8000C in heat-cool system with single transformer. MOUNTING WIRING ENTRANCE MOUNTING SCREW HOLE...
  • Page 4: Mounting Thermostat To Wallplate

    ZONE 1 CHANGEOVER CONTROL JUMPER R TO RC. M12563 Fig. 7. Typical wiring diagram for T8000C on zone 1 ENGAGE TABS AT TOP OF THERMOSTAT MABS II/L control panel. WITH SLOTS ON WALLPLATE. Setting Fan Operation (Fuel) Switch The fan operation (fuel) switch is preset at the factory in the F position.
  • Page 5 T8000C PROGRAMMABLE THERMOSTAT 3. Setting Heat Cycle Rate (see Table 2 for the cycle 1. Enter Installer Setup. keys rate options and equipment). to set the tem- Press the key to perature setpoint display the current heat cycle rate setting of 1, 3, 4, 52°F (11°C).
  • Page 6: Operation

    Setting Time and Temperature Cool: The thermostat controls the cooling system. Off: Both heating and cooling are off. The T8000C is preprogrammed with the time and tem- Heat: The thermostat controls the heating system. perature settings shown in Table 3. For instructions on programming the thermostat refer to the Owner’s Guide,...
  • Page 7 T8000C PROGRAMMABLE THERMOSTAT Cooling 1. Slide the SYSTEM switch to Off and the FAN switch CAUTION to On. The fan should run continuously. Damage To Compressor Possible. 2. Slide the FAN switch to Auto. In heating, the fan is Operating at too low of an outdoor temperature controlled directly by the heating equipment and may cause compressor damage.
  • Page 8 T8000C PROGRAMMABLE THERMOSTAT Automation and Control Solutions Honeywell Limited-Honeywell Limitée Honeywell 35 Dynamic Drive 1985 Douglas Drive North Scarborough, Ontario Golden Valley, MN 55422 M1V 4Z9 www.honeywell.com/yourhome 69-1434–1 69-1434–1 G.H. Rev. 2-02 Printed in Mexico...