Installation Guide
To begin, press and hold the s and FAN
buttons until the display changes.
Function
number Setting
Press s or t to change settings.
Press NEXT to advance to the next function.
Press DONE to exit and save settings.
10
Done Next
Installer setupFollow the procedure below to configure the thermostat to match the installed
heating/cooling system, and customize feature operation as desired.
Continued on next page
Setup function Settings & options (factory default in bold)
Shaded areas below apply only to TH5320U/TH5220D or as otherwise noted.
*[Other cycle rate options: 2, 4, 6, 7, 8, 10, 11 or 12 CPH]
1 System type 0 1 heat/1 cool conventional
1 1 heat/1 cool heat pump (no aux. heat)
2 Heat only — 2-wire systems, 3-wire zone valves (Series 20), and
normally open zone valves
3 Heat only with fan
4 Cool only
5 2 heat/1 cool heat pump (with aux. heat)
6 2 heat/2 cool conventional
7 2 heat/1 cool conventional
8 1 heat/2 cool conventional
9 2 heat/2 cool heat pump (no aux. heat) - TH5320U only
10 3 heat/2 cool heat pump (with aux. heat) - TH5320U only
2 Changeover valve
(O/B terminal)
0 Changeover valve (O/B terminal energized in cooling)
1 Changeover valve (O/B terminal energized in heating)
3 Fan control
(heating)
0 Gas or oil furnace — equipment controls fan in heating
1 Electric furnace — thermostat controls fan in heating
5 Stage 1 heat cycle
rate (CPH: cycles/hour)*
5 For gas or oil furnaces of less than 90% efficiency
1 For steam or gravity systems
3 For hot water systems & furnaces of over 90% efficiency
9 For electric furnaces
6 Stage 2 heat cycle
rate/Auxiliary heat
cycle rate (CPH)*
5 For gas or oil furnaces of less than 90% efficiency
1 For steam or gravity systems
3 For hot water systems & furnaces of over 90% efficiency
9 For electric furnaces
7 Auxiliary heat cycle
rate (CPH)*
Only TH5320U
for 3H/2C Heat Pumps
5 For gas or oil furnaces of less than 90% efficiency
1 For steam or gravity systems
3 For hot water systems & furnaces of over 90% efficiency
9 For electric furnaces
8 Emergency heat cycle
rate (CPH)*
9 For electric emergency heat
1 For steam or gravity systems
3 For hot water systems & furnaces of over 90% efficiency
5 For gas or oil furnaces of less than 90% efficiency