RCS Technology TZ45R Installation Manual

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
o

Heat Pump systems:
o
o
o

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 Meaning
Marking
24VAC Common
C
24VAC Return
R
G Fan
W or W1 Heat stage 1
Y or Y1 Cool stage 1
Heat stage 2
W2
Cool stage 2
Y2
Heat Pump HVAC System Wiring
Meaning
Terminal
Marking
C 24VAC Common
24VAC Return
R
Fan
G
Aux Heat
W or W1
Compressor stage 1
Y or Y1
Change Over Valve
O (or B*)
Y2 Compressor stage 2
* 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.
DCN: 140-01773-03
Installation Guide
Model TZ45R
Z-Wave Thermostat
1 stage heating and cooling
2 stage heating and cooling
1 stage heating and cooling
2 stage heating and cooling
nd rd
2 or 3 stage Auxiliary heating (heat strips)
Typical Wire Color
May be different!!!
Take a picture!
Blue
Red
Green
White
Yellow
Orange
Black
Typical Wire Color
May be different!!!
Take a picture!
Blue
Red
Green
White
Yellow
Orange (brown*)
Black
Record the old thermostat
wire color that was connected
to the terminal
Record the old thermostat
wire color that was connected
to the terminal
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