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Honeywell THP9045A - User Manual

Honeywell THP9045A
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Wire Saver Installation
Wire Saver THP9045A
(Optional – for thermostats
without 24-volt C wire)
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Honeywell THP9045A Specifications

General IconGeneral
TypeProgrammable Thermostat
DisplayColor touchscreen
Wi-Fi CapabilityYes
Product TypeThermostat
ConnectivityWi-Fi
Humidity ControlYes
Remote AccessYes
GeofencingYes
CompatibilityCompatible with most heating and cooling systems
Power SourceBattery or Hardwired
ApplicationResidential and commercial HVAC control
Voice ControlYes (Amazon Alexa, Google Assistant)
AlertsYes
Warranty1 year

Summary

About the Wire Saver

Tools Required for Installation

Lists small screwdriver, mounting tape, and thermostat wire bundle.

Step 1 Verify Need for Wire Saver

Check for Existing C Wire

Identify existing wires to confirm if a C wire is present.

Alternative Wiring Option

Use an extra wire from the bundle if no C wire is present on the old thermostat.

Step 2 Wire the Thermostat

Connecting Thermostat Wires

Instructions for loosening screws, inserting wires, and securing them.

Conventional vs. Heat Pump Wiring

Diagrams show wiring differences for conventional and heat pump systems.

Step 3 Mount the Wire Saver

Mounting Location and Method

Attaching the wire saver near the heating/cooling system's terminal block using tape.

Step 4 Select Wire Configuration

Matching System to Wire Combinations

Determining the correct wiring setup based on system stages (single/two-stage).

Step 5 Connect the Wire Saver

5 a Single-Stage Equipment Wiring

Detailed steps for wiring a single-stage heating/cooling system.

5 b Two-Stage Heat, Single-Stage Cooling Wiring

Instructions for connecting wire saver for two-stage heat, single-stage cooling.

5 c Two-Stage Heat, Two-Stage Cooling Wiring

Steps for connecting wire saver for two-stage heating and cooling systems.

Example Wire Saver Setup: Before and After

Visualizing Wiring Changes

Illustrates the system wiring before and after installing the wire saver.

Step 6 Close the Equipment Door

Ensuring System Power-Up

Closing the door activates the interlock switch for system and thermostat power.

Step 7 Follow Instructions in Quick Start Guide

Continuing Installation

Proceed with Step 1.8 in the Quick Start Guide for further setup.

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