Emerson 1HDEZ-1521

INSTALLATION

Installation

Reduce installation time with a USB

1. Go to www.white-rodgers.com

2. Enter 1HDEZ-1521 in the Model

Number Search  eld

3. Select the link for the USB download

tool and follow instructions

Upload pre-con gured thermostat

settings for every job!

Create custom messages for your rou-

tine maintenance and service calls!

Contents

Main WARNING ! CAUTION ! Applications and Speci cations Page Equipment Control Page Page INSTALLATION Fig. 1 - Typical Connection of a Single Stage or Multi-Stage System *Factory installed jumper between RH and RC * Fig. 2 - Typical Connection of Heat Pump System up to 4 Stages Heat/2 Stages Cool Page Wiring Guide for Equipment Accessories Thermostat Tabs 12 INSTALLATION Thermostat Equipment Control Power System Page Communicating Devices Page Page USB Upload Faults Status Thermostat Summary Heat Pump Lockout (outdoor sensor required) Dual Fuel Setpoint (outdoor sensor required) Page Installation Test Check System Operation Navigating through your thermostat menus Clock and Display Settings Heating Program Cooling Program Thermostat Settings Page Page Page Page Reset Operation Page Equipment Control Fault Codes Page PART NO. 37-7343B