RCS TBZ48A Installation Manual

This thermostat is compatible with most HVAC systems, including the following:

24VAC systems Note: requires both the R and C wires unless battery powered.

Standard gas/oil/electric heating systems
o
1 stage heating and cooling
o
2 stage heating and cooling

Heat Pump systems:
o
1 stage heating and cooling
o
2 stage heating and cooling
o
2

Do NOT use for line voltage controls (120/240VAC)
Replacing an existing Thermostat
Stop!
Before disconnecting wires from the existing thermostat, label
the wires with the terminal markings from the old thermostat and record
Take a picture...it will be very helpful with troubleshooting or
them below
.
if you need to reinstall the old unit.
Read all instructions before starting installation.
Standard HVAC System Wiring
Terminal Meaning
Marking
C 24VAC Common
R(RH,RC) 24VAC Return
G Fan
W or W1 Heat stage 1
Y or Y1 Cool stage 1
W2 Heat stage 2
Y2 Cool stage 2
Heat Pump HVAC System Wiring
Terminal Meaning
Marking
C 24VAC Common
R 24VAC Return
G Fan
W or W1 Aux Heat
Y or Y1 Compressor stage 1
O (or B*) Change Over Valve
Y2 Compressor stage 2
* if you have a terminal marked "B" with a brown wire attached to it, that means you have a
changeover (CO) with heating type heat pump system. Be sure to set the change over
type in the SYSTEM menu to CO type: H (heat). Otherwise leave it set to C (cool).
DCN: 140-02121-02
Installation Guide
Model TBZ48A
Battery Powered Z-Wave Thermostat
nd rd
or 3 stage Auxiliary heating (heat strips)
Typical Wire Color
Blue
Red
Green
White
Yellow
Orange
Black
Typical Wire Color
Blue
Red
Green
White
Yellow
Orange (brown*)
Black
firealarmresources.com
Record the old thermostat wire
connections and terminal
marking here
Record the old thermostat wire
connections and terminal
marking here
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