Aprilaire 8400 - Manual (Page 7)

7
SElECT fAN SETTINg (ON/AUTO/CIRC)
press to select:
ON: Fan runs continuously. Use this mode for maximum
air circulation/air cleaning.
AUTO: Fan runs only when the heating or cooling
system is on.
CIRC: Same as AUTO, but if the fan has been off for 20
minutes the fan will be activated for a 10 minute cycle.
Use this mode for a balance of energy savings and air
circulation/cleaning.
OpERATION –
All mODElS
bATTERy INSTAllATION AND RESET bUTTON
The thermostat can either be AC or battery powered, or
both. When wired to be AC powered, the batteries are
optional and only provide backup power to the clock.
The thermostat has a memory backup that saves the
thermostat’s settings in case of a power interruption.
The reset button located under the battery cover can be
used to reset the thermostat back to factory defaults.
RESET
BUTTON
RESET SERVICE REmINDER mESSAgES
press and hold and together for three
seconds to reset a service reminder message.
61000651B 8400 Tstat Owners.indd 7 7/23/09 10:43:03 AM