Remove Exis Ng Thermostat; Wiring Colors - Gocontrol GC-TBZ48 Installation & Operation Manual

Remove Existing Thermostat
• Turn off 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
TAKE A PICTURE!
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
Y
W
G
R
C

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 ng thermostat is a mercury-containing device, it must be disposed
of in compliance with federal, state, and local regula ons. Many states and /or local
agencies have collec on/exchange programs or hazardous waste collec on programs for
mercurycontainingdevices. For more informa on, see the U.S. Environmental Protec on
Agencywebsite at:h p://www.epa.gov/osw/hazard/wastetypes/universal/mce.htm For Canada:
Environment Canada and Disposing of Mercury Products at: h ps://www.ec.gc.ca/mercure-
mercury/default.asp?lang=En&n=F111AAC6-1.
Y
W
Y
EXISTING THERMOSTAT TERMINALS
Typical Wire Color
YELLOW
WHITE
GREEN
RED
BLUE
G
W R
G R
Cool
Heat
Fan
24VAC Return
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
Copyright © 2015 Nortek Security & Control LLC
C
LABEL THE WIRES TO MATCH
C
THE OLD THERMOSTAT TERMINAL
MARKINGS
Function
5