Alarm.Com ADC-T2000 User Manual page 6

Smart thermostat
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Terminal designations
Conventional system
Terminal
Description
Cooling power
RC
Heating power
RH
Configurable W3, H, DH or
Z
O/B zoning
Heat stage 1
W
W2
Heat stage 2
Heat stage 3
W3
Common wire from secondary
C
side of heating transformer
(if 2 transformers)
Cool stage 1
Y
Cool stage 2
Y2
Fan
G
Whole home humidifier
H
Whole home dehumidifier
DH
Energized in cool mode
O/B
8
Heat pump
Terminal
Description
Cooling power
RC
Heating power
RH
Z
Configurable W3, H, or DH
Aux stage 1
W
W2
Aux stage 2
Aux stage 3
W3
Common wire from secondary
C
side of cooling transformer
Pump stage 1
Y
Y2
Pump stage 2
Fan relay
G
H
Whole home humidifier
Whole home dehumidifier
DH
O/B
Reversing valve
Install the batteries
The thermostat can be powered by battery
or 24 VAC. If a wall transformer is used to
power the thermostat, connect between
C and RH.
Ensure the batteries are installed following
the specified polarity markings on
the thermostat.
CAUTION: SPECIAL BATTERY WARNING
Always replace the batteries as soon as
you have low battery levels, indicated by
"LOW" then "BATT" flashing on the display.
If the batteries drain, the thermostat
could leave the HVAC system on or off,
overheating or freezing the home.
Always replace the batteries at least once a
year. This will protect the thermostat from
damage and corrosion by leaking batteries.
If the home is unoccupied for a month or
more, such as with vacation homes, you
should replace the batteries as a preventive
measure against battery failure while you
are away.
Always use new batteries as replacements.
9

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