7 69-1385
Replacing a Clock Thermostat that has
C or C1 Clock Terminals?
If you are replacing a Honeywell Chronotherm®
Thermostat, you may find one or two wires that
go to the C or C1 clock terminals on the
Chronotherm® Thermostat wiring wallplate. Do
not allow them to touch, or you can damage
your transformer. Disconnect the wires and
wrap them separately, using electrical tape.
Do
not wrap them together
. Place the wires where
they do not interfere with the operation of the
new thermostat. Record the colors and terminal
designation labels of the remaining wires.
Six or more wires?
If there are six or more wires (excluding clock
wires attached to terminals), you probably have
a variation of a heat pump or multistage
system. This thermostat is
not
compatible with
those systems so return the product to the
retailer. If you want information about the
programmable thermostats that work with your
system, call Honeywell Consumer Services at
1-800-468-1502.
Three thermostat wires?
If you have three wires for heating only and can
operate the fan using the fan On switch, this
thermostat works with your system. However,
some hot water (zoned) heating systems have
three thermostat wires. The thermostat does
not work without installing an isolating relay on
these systems. For details, call Honeywell
Consumer Services at 1-800-468-1502.
