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ProgrammableFan (programmablemodels only)
The fan output can be programmed based on period of the day. When
programming for each day and period the fan can be set to On or AUTO.
DryContact
On theprogrammable models, the dry contactthat can be used for control of an
auxiliary device. The dry contact may be configured to be closed for a specific
numberof minutes per hour for each period of the program schedule. This can
be used to operate a ventilator, damper, system b lower, or other auxiliary device.
There are two terminals, D1 and D2.
If it is desired to operate a ventilator or other devi ce, the D1 and D2 terminals
can beconnected directly to the equipment.This will provide a closed contact
forthe specified numberof minutes per hour. See Option 19.
Iftimed control of thesystem blower is required,the dry contact canbe used for
this function. The G terminal canbe connected to one of the dry contact
terminals with the other terminal bein g connected to Rc and/or Rh for timed
controlof the fan. Note that thisis not the same as programmablefan Option 30.
See Wiring Diagrams for more information.