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Thermostat, ABB-free@home Installation and Operation Instructions
En
g
lish
IMPORTANT
: Carefully read all instructions and safety
information about this device before operation. Please leave
this document with the homeowner for future reference.
WARNING
: Installation must be performed by a licensed HVAC
installer or electrical professional. Improper installation can
cause property damage, personal injury, or loss of life.
Intended Use
The Thermostat is used as part of the ABB-free@home
®
system. It
controls the temperature and humidity in a house or an apartment.
For information about the many functions of this device, see the system
manual at www.abb.com/us/freeathome.
Box Contents
A - Thermostat
B - Mounting Base
C - 2 Wall Screws & 1 Anti-Theft Screw
D - Wiring Labels
Optional Accessory (not included):
Trim Plate TH-TP-1-WH Hides
holes/marks from old thermostat
INSTALLATION
1. Turn OFF the power to the heating/cooling system by switching off the
breaker or with the switch that controls the heating/cooling system.
Check to make sure the old system is OFF by changing the
temperature. If the system does not turn on within 5 minutes, the
power is OFF.
2. Remove the old thermostat cover. Do NOT remove any wires from the
thermostat.
3. Take a picture of the old thermostat’s wiring.
4. Label the wires with the wire labels provided. The ABB
Thermostat requires a “C”-wire. If there is no “C”-wire the
wiring must be changed.
IMPORTANT
: The ABB Thermostat does NOT work with 120 V
or higher! If the existing thermostat is labeled 120 V or 240 V,
has thick black wires with wire nuts, or has L1 or L2 terminal
blocks: DO NOT connect device!
Wiring Connection
(See Wiring Guide for more details)
Conventional Setup
Rc
Cooling power, 24 V
Rh
Heating power, 24 V
C
Common, 24 V (from Rc)
Y1
Cooling (stage 1)
Y2
Cooling (stage 2)
G
Fan
W1
Heating (stage 1)
W2
Heating (stage 2)
ACC
For accessories*.
Operated by the “AUX”
symbol on the display.
O/B
Not used
* Typical accessories: humidifier or dehumidifier
IC
