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PRODUCT DATA
® U.S. Registered Trademark
Copyright © 1998 Honeywell Inc. • • All Rights Reserved
T8700B,C
An Electronic Round™
Programmable Thermostat
APPLICATION
The T8700 Electronic Round™ Programmable Thermostats
provide single-stage, programmable temperature control for
24V heating and/or cooling systems. See Table 1 for model
descriptions.
Table 1. T8700 Thermostat Description.
FEATURES
• Attractive neutral styling complements any decor.
• Easy-to-use means fewer homeowner questions and
increased homeowner satisfaction.
• Large easy-to-read display.
•Keys located near the display for easy access.
•Fan and System switches are located on the top of the
wallplate to eliminate accidental setting changes.
• Quick and easy installation.
Two-period programming for added energy savings.
• Manual changeover from heat to cool eliminates
unexpected system operation (T8700C).
• °F or °C temperature display for added model
flexibility.
• Selectable heating cycle rate (1, 3, 6 or 9 cph) allows a
variety of applications and reduced inventory.
• Cooling (T8700C) cycle rate fixed at 3 cph (the standard
setting for compressors) allows a speedy installation.
•Programming permanently held in memory (no
batteries needed) and retained during power outages
for increased installer and homeowner convenience.
• Compatible with most equipment and application
needs including gas, oil and electric forced air;
condensing gas furnaces; hydronic heat; and gravity
and radiant heat systems.
•Powerstealing eliminates need to run additional wires.
Contents
Application........................................................................... 1
Features .............................................................................. 1
Specifications ...................................................................... 2
Ordering Information ........................................................... 2
Installation ........................................................................... 3
Settings and Adjustments ................................................... 6
Setting the Clock ................................................................. 7
Programming....................................................................... 7
Operation ............................................................................ 8
Checkout .............................................................................10
Troubleshooting ...................................................................11
68-0197-1
T8700C
Model
System
Selection
Fan
Selection
Wiring
Terminals
Used
T8700B1007 HEAT-OFF NONE R,W
T8700B1015 HEAT-OFF ON-AUTO R,G,W
T8700C1005 HEAT-OFF-
COOL
ON-AUTO R,G,W,Y