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IEC E055-71520305 - User Manual

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2- or 4-pipe configurable
Dual or Single Setpoint
7 Day Programmable
3 Occupied, 1 Unoccupied
Very easy to program
Large, easy to read display
Thermoglow Backlight
Auto-Changeover
Locking Keypad
Override capable
Meets California Title 24
OWNER'S MANUAL
P/N E055-71520302
P/N E055-71520305
Auto-Changeover is available in 4-pipe systems,
in 2-pipe systems with Electric Heat, or when
used with G100-71520306 accessory, auto-
changeover sensor.
72
74
70
Am
COOL
HEAT
AUTO
Mo
I2:00
FAN COIL
PROGRAMMABLE
DIGITAL THERMOSTAT
Copyright 2007, International
Environmental Corp. All Rights Reserved
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Summary

Programmable Digital Thermostat Overview

Front Panel Layout and Controls

Liquid Crystal Display with Thermoglow

The main screen displaying temperature, time, and status.

Up;Down Control Buttons

Buttons used to adjust setpoints and navigate menus.

Mode Selection Button

Button to cycle through operating modes (Heat, Cool, Auto).

Fan;Override Button

Button to control fan and temporary schedule overrides.

Heat;Cool Status Indicator

Visual indicator for heating (red) or cooling (green) operation.

Display Screen Elements

Mode Indicators Explained

Icons representing operational modes like HEAT, COOL, AUTO, PROGRAM.

Clock and Day of Week Display

Shows current time and day, used for programming.

Current Room Temperature Display

Shows the ambient temperature sensed by the thermostat.

Desired Set Temperature Display

Indicates the target temperature for heating or cooling.

Override Icon Status

Indicates a temporary manual adjustment of the schedule.

Occupied;Unoccupied Status Icons

Shows the current program status (occupied or unoccupied).

Setup Mode Indicator

Shows when the thermostat is in advanced setup mode.

Fan Status Icons

Displays fan operation status (Auto, low, medium, high).

Start and Stop Time Icons

Icons used during programming occupied periods.

Keypad Locked Indicator

Shows when the keypad is locked to prevent changes.

External Sensor Display Indicator

Shows if temperature data is from an external sensor.

Quick Start Guide

Setting the Thermostat Clock

Instructions for setting the current time accurately.

Setting the Thermostat Day

Instructions for setting the current day of the week.

4-Pipe System Operating Modes

Heating Only Mode

Sets the system to provide heat only.

Cooling Only Mode

Sets the system to provide cool only.

Automatic Heat;Cool Changeover

System automatically switches between heat and cool.

Timed Schedule Operation

Activates programmed heating/cooling schedules.

System Off Mode

Turns off both heating and cooling functions.

2-Pipe System Operating Modes

2-Pipe Heat Only Configuration

Sets the system for heating only in 2-pipe configurations.

2-Pipe Timed Schedule Operation

Activates programmed schedules for 2-pipe systems.

2-Pipe System Off Function

Disables both heating and cooling for 2-pipe systems.

2-Pipe Cooling Only Configuration

Sets the system for cooling only in 2-pipe configurations.

2-Pipe Automatic Heat;Cool Changeover

Auto switching for 2-pipe systems with sensor.

2-Pipe Program On Operation

Activates programmed schedules for 2-pipe systems.

2-Pipe System Off State

Turns off heating and cooling for 2-pipe systems.

Basic Operation and Temperature Adjustment

Adjusting Desired Temperature Setpoints

How to set target temperatures for comfort.

Fan Speed and Operation Control

Managing fan speeds (low, med, high) and Auto mode.

Schedule Override Procedures

Temporarily changing the current schedule settings.

Forcing Unoccupied to Occupied Settings

Initiating Occupied 1 comfort during unoccupied periods.

Programming Occupied and Unoccupied Periods

Entering Time Period Programming Mode

Accessing the programming interface.

Configuring Occupied 1 Setpoints

Setting temperature for Occupied 1 period.

Configuring Unoccupied Setpoints

Setting temperature for Unoccupied periods.

Setting Unoccupied Heating Setpoint

Setting target heat temp for unoccupied times.

Selecting Days for Occupied 1

Assigning specific days to Occupied 1 schedule.

Setting Occupied 1 Start and Stop Times

Defining the active hours for Occupied 1.

Enabling;Disabling Occupied 1 Daily

Activating or deactivating Occupied 1 for a given day.

Copying Daily Programs to Other Days

Replicating schedules across the week.

Selecting Days for Program Copy

Specifying target days for schedule copying.

Setting Start Time for Program Copy

Transferring start times during copy process.

Setting Stop Time for Program Copy

Transferring stop times during copy process.

Enabling;Disabling Occupied 1 via Copy

Activating/deactivating copied schedules.

Programming Notes and Guidelines

Important considerations for programming.

Advanced Setup Menu Navigation

Accessing Advanced Setup Screens

Method to enter the advanced configuration menu.

Adjusting Current Time of Day

Setting or correcting the thermostat's internal clock.

Setting Current Day of the Week

Selecting the correct day for accurate scheduling.

Configuring Display Operation Modes

Setting display to full or minimal view.

Display Setpoint Configuration Options

Choosing between single or dual setpoint display.

Selecting Fan Coil System Type

Specifying if the system is 2-pipe or 4-pipe.

Configuring 2-Pipe System Operation

Defining specific modes for 2-pipe systems.

Fan Operation in Auto Mode Settings

Controlling fan behavior when in Auto mode.

Setting 1 st Stage Deadband

Adjusting temperature swing for the first stage.

Setting Minimum Heat;Cool Differential

Defining the minimum temperature gap between modes.

Backlight Control Settings

Adjusting backlight behavior for energy saving.

Thermostat Temperature Units (F;C)

Selecting Fahrenheit or Celsius for temperature display.

Duct Sensor Operation Mode

Configuring how the duct sensor influences operation.

Setting Override Timer Duration

Adjusting how long overrides remain active.

Dry Contact Polarity Configuration

Setting Normally Open/Closed for dry contact input.

Dry Contact Operation Mode Selection

Linking dry contact to Occupied or Unoccupied modes.

Setting Unoccupied Setpoints via Dry Contact

Controlling unoccupied setpoints using dry contact.

Advanced Setup Options Table

Advanced Features Overview

Temperature Sensor Calibration Procedure

Steps for calibrating the internal temperature sensor.

Clock Backup Power Functionality

How the clock maintains time during power outages.

Deadband Operation Explained

How deadbands control fan speed stages.

Dry Contact Switch Functionality

Using external devices to control modes.

Terminal Connections Diagram and Labels

Visual guide to wiring terminals on the thermostat.

Factory Default Reset Procedure

Procedure to reset all settings to original defaults.

Fan Operation Modes

In-depth look at fan modes (Auto, Continuous).

Minimal Display Mode Configuration

Setting the display for reduced information.

Energy Saving Smart Fan

Fan behavior for energy efficiency in unoccupied periods.

Heat;Cool Differential Adjustment

Setting the minimum temperature difference between modes.

Keypad Lockout and Unlock

How to disable or enable front panel buttons.

Locking Cover Installation Notes

Information regarding the tamper-proof cover.

Optional Outside Sensor Functionality

Viewing external temperature readings.

Duct Sensor Installation and Wiring

Details on connecting and using the duct sensor.

Single Setpoint Behavior and Deadband

How the thermostat operates with a single setpoint.

Warranty Terms and Conditions Overview

Order Acknowledgement and Product Specifications

Binding terms for orders and product conformity.

Pricing, Payment, and Shipping Terms

Conditions for quoting, payment, and delivery.

Title Transfer and Risk of Loss

When ownership and responsibility for goods pass.

Handling Production and Shipping Delays

Procedures for managing order fulfillment delays.

Warranty Coverage Details

Duration of warranty and items not covered.

Implied Warranties, Remedies, and Liabilities

Legal aspects of warranty and damages.

Conditions Voiding the Warranty

Situations that invalidate the warranty.

System Design and Maintenance Responsibility

IEC's limited role in system design and maintenance.

Purchasers Tax and Data Responsibilities

Allocation of taxes, duties, and data usage limitations.

Excusable Events (Force Majeure)

Circumstances beyond IEC's control affecting performance.

Late Payment Penalties and Collection Costs

Charges for overdue accounts and collection expenses.

Contract Cancellation Policies

Terms and conditions for cancelling an order.

Restrictions on Assignment of Rights

Limitations on transferring agreement rights.

Lien Waiver Requirements

Conditions for providing lien waivers upon payment.

Order Acceptance Conditions

Final terms and conditions for order acceptance.

IEC E055-71520305 Specifications

General IconGeneral
BrandIEC
ModelE055-71520305
CategoryThermostat
LanguageEnglish

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