DCN: 140-02302-01
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HVAC System Setup
In the Installer Settings main menu, us the down arrow button to scroll down to the System
Settings menu item and press Select.
System Settings Menu screen
Select the Mechanical Settings menu item and press Select.
Mechanical Settings Menu Screen
HVAC Setup Settings
Set these settings to match the HVAC system the thermostat is connected to.
Type
Selects HVAC type, Gas/Electric or Heat pump (HP)
Options: Gas/Elec or Heat pump
Default: Gas/Elec
Fan Type
(if Type=Gas/Elec) Selects the heating system Fan type
Options: Gas or Electric (heat)
Default: Gas
C/O Type
(if Type=HP)
Selects the Changeover Valve type for Heat Pump systems
Options: w/Cool or w/Heat
Default: w/Cool
For retrofit installations, refer to the existing thermostat connections to help determine
correct C/O type setting. If the original system had an orange wire connected to an “O”
terminal, then it is a “changeover with cool” system. If there is a brown wire connected to
the “B” terminal, then it is a “change over with heat” system. NOTE: if you get cooling
when expect heating (or heating when you expect cooling), change the C/O type to the
other selection.
Done
Select
Mechanical Settings
Sched Enable
Recovery Enable
H/C Delta
System Settings
+
_
Done
Select
Type Gas/Elec
Fan Type: Gas
2nd Stage Heat N
2nd Stage Cool N
Mechanical Settings
+
_
DCN: 140-02302-01
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2nd Stage Heat
Enables the 2nd Stage Heating operation
Options: Y or N
Default: N
Aux Heat
(if Type=HP) Enables Auxiliary Heat (heat strips) operation.
Options: Y or N
Default: Y
2nd Stage Cool
Enables the 2nd Stage Cooling operation
Options: Y or N
Default: N
Other Installer Settings
The Installer Settings Menu includes other HVAC operation settings that can customize the
thermostat for the installation. CAUTION: these settings affect HVAC system operation
and should only be changed by qualified HVAC service technicians.
Installer Settings Menu Items
Display Lock
Options: Y or N Default: N
Y = Display LOCKED N = Display UNLOCKED
Allows you to lock or unlock the thermostat buttons. When the buttons are locked, you can
still access the main menu, but you will not be allowed to select any menu options. The
Installer Settings hidden button operation is always operational, allowing you to return to
this screen and turn Display Lock off.
Service Mode
Test Mode
Options: Y or N
Default: N
Y= Test mode on. Reduces all delays to 10 sec for quicker system testing
N= Test mode off. Normal system delays
CAUTION: in test mode all system safety delays are shorten. Do not operate the
system compressor in test mode. Disconnect Y1 or Y2 outputs if using test mode
on a live system.
System Settings
Submenu:
Sets the HVAC operational settings below
Mechanical Settings
Submenu:
Sets HVAC system type and configuration
See HVAC setup instructions above
Schedule Enable
When enabled, the local thermostat’s scheduler function is enabled.
Options: Y or N
Default: N
Recovery Enable
For Heat Pump Systems. Intelligent setback recovery is an automatic
advance start of heating to allow the system to be at setpoint by the schedule time without
the use of Aux Heating.
Options: Y or N
Default: N
H/C Delta
Sets the minimum separation between heating and cooling setpoints.
Options: 3 - 15 degrees
Default: 3 deg F (1 deg C)
Attempts to lower the cooling setpoint below the heating setpoint will PUSH the heating
setpoint down to maintain this separation. Same for setting the heating setpoint above the
cooling setpoint, it will PUSH the cooling setpoint up to maintain this separation.
Fan Purge Range:
Fan will continue to run after a call for heating or cooling to purge the
conditioned air from the ducts.
Options: 0-120
Default: 0 (=off)
Heating Delta Stage 1 ON
Sets the delta from setpoint that stage 1 heating starts.
