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Installation Guide
10
AC Power
The thermostat can be powered by 24
VAC power, or by batteries.
To wire the thermostat for AC power,
connect the common side of the cool-
ing transformer to the “C”terminal as
shown at left.
IImmppoorrttaanntt::
Remove R/Rc jumper for
2-transformer systems only. (See wiring
diagram on page 5.)
Connect common
side of transformer
to “C” terminal
Install batteries in back of thermostat
(optional if AC powered).
Battery Power
The thermostat can be powered by
batteries alone or, if used with AC
power, can provide backup power to
the display during power interruptions.
After installation, batteries can be
changed without removing the ther-
mostat from the wall (see page 15).
To Mount Thermostat
Align the 4 tabs on the wallplate with
corresponding slots on the back of the
thermostat, then push gently until the
thermostat snaps in place.
Jumper
Power options & mounting