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Honeywell Magic Stat CT3100 Installation Manual page 2

Microelectronic heating or heating/cooling thermostat
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P
W
*
c
1
PREPARATION
-
u)
Your new thermostat
is compatible
with most 24
V furnace
systems, and in most cases, should
not
require additional
accessories
for proper operation.
Table I lists the exceptions
which require an
isolating
relay or relay and transformer.
Review
Table I to determine
if your system requires
the
accessory.
lf so, you may use the order form at the
end of this booklet.
Detailed
relay installation
instructions
are provided
along with the accessory.
The isolating
relay is a device used for heating
systems where the voltage in the control circuit is
interrupted
during
parl of the furnace's
cycle.
cutting off power to the thermostat.
The isolating
relay supplies
the thermostat
with a constant
24
volts, eliminating
any power interruptions
to the
thermostat.
The thermostat
then receives its
operating
voltage directly from the 24 V trans-
former, allowing
for operation
of your thermostat.
Any questions
concerning
your system's com-
patibility with your thermostat
may be directed
to
Honeywell
Consumer
Affairs at their toll-free
number,
l-800-468-1502.
ON LOW VOLTAGE
(18 TO 30 Vat). THE
APPLICATION
OF HIGHER
VOLTAGE
IS
DANGEROUS
AND MAY CAUSE
ELECTRI-
1
INJURY
1
69-8024-Z

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