Installation Guide

7
Operating Your Thermostat
Setting the System Control Mode
TheSystemControlhasseveralmodesof
operationthatcanbeselectedbymovingthe
SYSTEMswitchtotheappropriateposition.
COOL Onlyyourcoolingsystemwilloperate
OFF Heatingandcoolingsystemsareoff
HEAT Onlyyourheatingsystemwilloperate
Additional Switch Position (Model 2220 Only):
EMER Operatesabackupheatsource(EmergencyHeat)forheatpump
 systemsonly
NOTE: If your model 2220 was configured for
a conventional system (CONV) then you will not
have the EMER (emergency heat) option and
“NO EMER SET” will flash in the display if
EMER is selected with the system switch.
Setting the Fan Control Mode
TheFanControlhas2modesofoperation–AUTOandON.Themodecan
beselectedbymovingtheFANswitchtotheappropriateposition.
AUTO Thesystemfanwillrunonlywhenyour
  heatingorcoolingsystemisrunning
ON Thesystemfanstayson
Temperature Adjustment
Temporary Adjustment–Presstheorbuttontoadjustthecurrent
setpointtemperature.
Extended Adjustment–PresstheHOLDbuttonsothatHOLDappearsin
thedisplayscreen.Pressortoadjustthecurrentsettemperature
(See“ExtendedHoldPeriod”,page8).
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