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CAUTION
If you have a two-transformer
(5-wire) system and both heat
and cool transformer secondar-
ies are grounded, you cannot
use this thermostat, even if the
transformers are properly
phased.
Never connect the common
(neutral) wire on the 24v AC
side of the transformer to the
thermostat.
NOTE
For systems where neither or
only one of the transformers is
grounded, you may use this
thermostat only if the transform-
ers are properly phased. Use fig.
4 to wire the thermostat. If you
are not sure of your particular
application, contact a qualified
service person or call the techni-
cal service number found
elsewhere in this booklet.
4. Connect wires to the appropriate
terminals on the base. See table 1 and
figs. 2, 3, and 4 to match the tagged
wires with the correct terminals.
9
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