RCS Technology TZ45A - User Manual

DCN: 140-02034-03 Page 1
Installation Guide
Model TZ45A
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, be sure to label the
wires with the terminal markings on the old thermostat and record them
below.
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
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 (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.

Summary

Z-Wave Thermostat Installation Guide

Wiring Preparation and Labeling

Instruction to label existing thermostat wires before removal.

HVAC System Setup and Configuration

Accessing Installer Settings

HVAC System Type Configuration

Details information needed to configure the thermostat for HVAC system type.

Installer Settings Menu Options

Display Lock and Service Mode

Mechanical Settings: Type and Fan

Covers Type, Fan Type, C/O Type, 2nd Stage Heat/Cool, and Aux Heat settings.

Delta Settings Overview

H;C Delta Adjustment

Detailed Delta and Delay Settings

Setpoint Limits and Cycle Protection

Covers Max Heat SP, Min Cool SP, Minimum Run Time, and Minimum Off Time.

Fan Cycler, Defaults, and Settings Summary

Installer Settings Summary Table

Comprehensive table summarizing all installer settings and their defaults.

User Settings Menu Overview

Standard Gas;Electric System Guide

System Wiring Diagram

Illustrates the wiring connections for a standard gas/electric HVAC system.

System Setup Configuration

Guides on setting Type, Fan Type, 2nd Stage Heat/Cool for standard systems.

Heat Pump System Guide

Heat Pump Wiring Diagram

Illustrates wiring for a heat pump HVAC system.

Heat Pump Setup Configuration

Guides on setting Type, C/O Type, Aux Heat, and 2nd Stage Heat/Cool for heat pumps.

Adjusting Temperature Setpoints

Setpoint Interaction Logic

Explains how setpoints adjust to maintain separation.

System Mode Operations

Understanding System Modes

Details OFF, HEATING, COOLING, and AUTO modes.

Emergency Heat Mode for Heat Pumps

Describes the special mode for heat pump emergency heat.

Fan Control and Status Indicators

Interpreting System Status Labels

Z-Wave Network Integration

Adding Thermostat to Z-Wave Network

Steps to add the thermostat to a Z-Wave network via a controller.

Controlling Away Mode via Z-Wave

Z-Wave Network Inclusion;Exclusion

RCS Technology TZ45A Specifications

General

Power Source	Battery
Accuracy	+/- 1°F
Display	LCD
Power Supply	2 x AA batteries
Temperature Range	5°C to 35°C
Mounting	Wall