Nortek Security & Control Gocontrol GC-TBZ48L, Installation & Operation Manual

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Copyright © 2017 Nortek Security & Control LLC 5
Remove Existing Thermostat
• Turn o ff the power to the thermostat. This is usually done at the hea ng/cooling system or
circuit breaker panel.
• Remove the cover of old thermostat to expose the wiring terminals.
• Take a picture of the wiring terminals and the wires before disconnecting them!
• Mark the exis ng thermostat wires with the wiring labels included according to the terminal
markings. Some installa ons may have addi onal wires not shown in this example illustra on.
Y1, Y2, W1, W2, O,B.
• Use the thermostat terminal “names/marking” (not the wiring color) to mark the wires.
• Remove the old thermostat base.
CAUTION: When removing thermostat, don’t let the wires slip into the wall and don’t let the wires
touch each other.
• If the old thermostat was a mercury style thermostat, dispose of it properly as described below.
Figure 2. Label Wire Terminals
NOTE: Taking a picture is critical if problems are encountered. This will allow reinstallation
of the old thermostat and will help with troubleshooting later if needed.
Terminal Typical Wire Color Function
Y YELLOW Cool
W WHITE Heat
G GREEN Fan
R RED 24VAC Return
C BLUE 24V Common (typically BLUE). When the wire is
present, the thermostat can be powered without
ba eries. When the wire is absent, the thermostat
must be powered by ba eries if 24VAC is present
across the R&C wires
Wiring Colors
While the thermostat terminal markings are intended to match the wire color, (R=RED, G=GREEN,
W=WHITE, Y=YELLOW) be sure to follow the terminal marking when marking the wires, even if the
wire color doesn’t match.
WARNING: If the exis Ɵ ng thermostat is a mercury-containing device, it must be disposed
of in compliance with federal, state, and local regula Ɵ ons. Many states and /or local
agencies have collec Ɵ on/exchange programs or hazardous waste collec Ɵ on programs for
mercurycontainingdevices. For more informa Ɵ on, see the U.S. Environmental Protec Ɵ on
Agencywebsite at:h Ʃ p://www.epa.gov/osw/hazard/wastetypes/universal/mce.htm For Canada:
Environment Canada and Disposing of Mercury Products at: h Ʃ ps://www.ec.gc.ca/mercure-
mercury/default.asp?lang=En&n=F111AAC6-1.
C
R
G
W
Y
C
R G
W Y
LABEL THE WIRES TO MATCH
THE OLD THERMOSTAT TERMINAL
MARKINGS
EXISTING THERMOSTAT TERMINALS
TAKE A PICTURE!