1220 User Manual

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User Factory Setting

No. Options Default Options Comments

 1 1ststage

0.5

0.5, 1.0

Selecta1ststagetemperature

   differential  

or 2.0 differentialof.5˚,1˚or2˚F(.2˚,.5˚

       or1˚C)

 2 2ndstage

2.0

1.0, 2.0,

 Selecta2ndstagetemperature

   differential  

3.0, 4.0

, differentialof1˚,2˚,3˚,4˚,5˚or6˚F

 (1220Only)

5.0 or 6.0

 (.5˚,1˚,1.5˚,2˚,2.5˚or3˚C)

Table of User Options

Detailed Explanation of User Options:

Temperature Differential

(User Option 1 and 2)

Thedifferentialsettingisthetemperaturecontrolrangethatyourthermostat

willprovide.Thesmallerthesetting,thetighteryourrangeoftemperature

controlandcomfortwillbe.The2ndstagedifferentialisonlyforsystems

withasecondstageofheating(auxiliaryheat).

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 1220 Only):

EMER Operatesabackupheatsource(EmergencyHeat)forheatpump

 systemsonly.

NOTE: If your model 1220 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.

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User Manual - Page 8