RCS Technology TZ45R, Installation Manual, Page: 1 / 21

DCN: 140-01773-03 Page 1
Installation Guide
Model TZ45R
Z-Wave Thermostat
This thermostat is compatible with most HVAC systems, including the following:

24VAC systems Note: requires both the 24R and 24C (common) wires

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)
Stop!
Before removing your existing thermostat do the following:
1. Take a picture of the original wires and terminal connections
2. Label the wires with the terminal markings on the old thermostat
3. Record old thermostat terminals and the wire color connected to them below
Standard HVAC System Wiring
Terminal
Marking Meaning Typical Wire Color
May be different!!!
Take a picture! Record the old thermostat
wire color that was connected
to the terminal
C
24VAC Common Blue
R
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
May be different!!!
Take a picture! Record the old thermostat
wire color that was connected
to the terminal
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 (C/O) with heating type heat pump system. Be sure to set the change over
type in the
Installer Settings menu to C/O Type: w/Heat. Otherwise leave it set to
w/Cool .