Dry Contact Operation - York LX series Owner's Manual

Installer Setup
Free Cooling (Setup Steps 67 - 68)
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 may also be required.
Free Cooling With A/C (Setup Step 67) - 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 en-
able all stages of cooling to use only the Free Cooling damper.
Free Cooling Usable Temp (Setup Step 68) - 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 degrees Fahrenheit.
Venting
To use Venting, Setup Step 58 must be set to 'VENTING'.
The Venting feature allows your HVAC system to exhaust air from inside to the outside,
when there is a cooling call. Press FAN twice to activate Venting. While Venting is
active, heating and cooling are disabled. The installation of a Venting damper will be
required.
Dry Contact Operation(setup step 70 - 71)
Dry Contact Polarity (Setup Step 70)
Open (Normally Open) - The dry contact
is open until the connected device closes
the circuit.
'Idle' 'Active'
Dry Contact Use (Setup Step 71)
PAN - If PAN is selected when the dry contact is active, the thermostat will lockout the
compressor terminal(s) and "SERVICE DRAIN PAN" will appear on the display.
VACATION - If VACATION is selected when the dry contact is active, the thermostat
will be forced into Vacation Mode.
To use Free Cooling, Setup Step 58
must be set to 'FREE COOLING'.
Closed (Normally Closed) - The dry
contact is closed until the connected
device opens the circuit.
'Idle'
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'Active'