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FocusPRO
™
TH6110D Programmable Thermostat
7
Installation Guide
6
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
cooling 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.
During power interruptions the
batteries will save time/day settings
and power the display.
After installation, batteries can be
changed without removing the ther-
mostat from the wall (see page 11).
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
Typical heat-only system with fan Heat-only system (Series 20)
Typical cool-only system Heat-only system (normally open zone valve)
Power supply. Provide disconnect means and overload protection as required.
Factory-installed jumper. Remove for 2-transformer systems only.
Optional 24VAC common connection.
In Installer Setup, set system type to Heat Only
.
In Installer Setup, set system type to Heat Pump & changeover valve to 0 or B.
Wiring diagrams