DCN: 140-02121-02
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Installation Guide
Model TBZ48A
Battery Powered Z-Wave Thermostat
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
nd
or 3
rd
stage Auxiliary heating (heat strips)
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
them below
.
Take a picture…it will be very helpful with troubleshooting or
if you need to reinstall the old unit.
Read all instructions before starting installation.
Standard HVAC System Wiring
Terminal
Marking
Meaning
Typical Wire Color
Record the old thermostat wire
connections and terminal
marking here
C
24VAC Common
Blue
R(RH,RC)
24VAC Return
Red
G
Fan
Green
W or W1
Heat stage 1
White
Y or Y1
Cool stage 1
Yellow
W2
Heat stage 2
Orange
Y2
Cool stage 2
Black
Heat Pump HVAC System Wiring
Terminal
Marking
Meaning
Typical Wire Color
Record the old thermostat wire
connections and terminal
marking here
C
24VAC Common
Blue
R
24VAC Return
Red
G
Fan
Green
W or W1
Aux Heat
White
Y or Y1
Compressor stage 1
Yellow
O (or B*)
Change Over Valve
Orange (brown*)
Y2
Compressor stage 2
Black
* 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).
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