FocusPRO
™
TH6220D Programmable Thermostat
9
Installation Guide
8
Typical cool-only system
Heat-only system (normally open zone valve)
Wiring diagrams
Wiring diagrams
Typical 2H/2C system (1 transformer)
Typical 2H/1C heat pump system
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
1Heat/1Cool Heat Pump
& changeover valve to
0
or
B
.
In Installer Setup, set system type to
2Heat/1Cool Heat Pump
.
L terminal is powered continuously when thermostat is set to Em Heat.
Install field jumper between Aux and E if there is no emergency heat relay.
In Installer Setup, set system type to
2Heat/2Cool conventional
.
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
1Heat/1Cool Heat Pump
& changeover valve to
0
or
B
.
In Installer Setup, set system type to
2Heat/1Cool Heat Pump
.
L terminal is powered continuously when thermostat is set to Em Heat.
Install field jumper between Aux and E if there is no emergency heat relay.
In Installer Setup, set system type to
2Heat/2Cool conventional
.