20
Installer Guide
Free Cooling
(setup steps 75 - 76)
To use Free Cooling, setup step 67 must be set to ‘FREE COOLING’.
Free Cooling is an energy saving way to boost the efficiency of your air conditioning
system by bringing in fresh air from the outside. The installation of a Free Cooling damper
and outdoor temperature sensor are required.
Free Cooling With A/C
(Setup Step 75) - When the Aux Output is being used for Free
Cooling and an air conditioning system is present, set this step to
ON
. Fresh, outside air
may be used for first stage cooling in place of your air conditioner. If your system does not
have an air conditioner installed, set this step to
OFF
. This will enable all stages of cooling
to use only the Free Cooling damper.
Free Cooling Usable Temp
(setup step 76) - This step allows the user to specify the
outdoor temperature below which Free Cooling can be utilized. For example, if this step is
set for 65 degrees, Free Cooling will be used until the outdoor temp rises above 65. Temps
are adjustable from 40˚ to 80˚ Fahrenheit.
Dry Contact Operation (Setup Steps 78-79)
Dry Contact Polarity
(Setup Step 78)
Open (Normally Open)
- The dry
contact is open until the connected
device closes the circuit.
Condensate Dry Contact Use
(Setup Step 79)
If selected when the dry contact is active, the thermostat will lockout the compressor
terminal(s) and
CONDENSATE PAN OVERFLOW
will appear on the display.
VACATION
- The HOME/AWAY feature allows the thermostat to use temporary, energy
saving settings without having to change regular programming. Vacation setup/
programming at the local thermostat is limited to the number of days employing Home/
Away settings. When the optional Wi-Fi module is detected in the thermostat, local
Vacation programming is not allowed. In this case Vacation setup and programming is
accomplished with the
web portal. The
web portal gives the user
extensive control over Vacation settings.
Closed (Normally Closed)
- The dry
contact is closed until the connected
device opens the circuit.
Dr
y
Contact
‘Idle’
‘Active’
Dr
y
Contact
Dr
y
Contact
‘Idle’
‘Active’
Dr
y
Contact
PSP4273_Installer man.indd 20
PSP4273_Installer man.indd 20
6/9/21 11:23 AM
6/9/21 11:23 AM