IEC E055-71520301, E055-71520304 Owner's Manual

OWNER'S MANUAL

Auto-Changeover is available in 4-pipe systems,
in 2-pipe systems with Electric Heat, or when
used with G100-71520306 accessory, auto­changeover sensor.

FAN COIL

NON-PROGRAMMABLE

DIGITAL THERMOSTAT

Copyright 2008, International

Environmental Corp. All Rights Reserved

72

74

70

C

OOL

H

EAT

AUTO

2- or 4-pipe configurable
Dual or Single Setpoint
Very easy to program
Large, easy to read display
Thermoglow Backlight
No batteries required
Auto-Changeover
Locking Keypad

P/N E055-71520301
P/N E055-71520304

P/N E055-71520301 and P/N E055-71520304

Table Of Contents

FRONT PANEL
DISPLAY

BASIC OPERATION

ADVANCED SETUP
ABOUT ADVANCED FEATURES

& OPERATION

WARRANTY

2
3

9

10

16
25

Page 1

CAUTION

WARNING

SELECTING THE HEAT
OR COOL MODE

5

Follow Installation Instructions
carefully. Disconnect Power
to the Heater/Air Conditioner
before removing the old therm-
ostat and installing the new
thermostat.

Copyright 2007, International

Environmental Corp. All Rights Reserved

P/N E055-71520301 and P/N E055-71520304

Table Of Contents

FRONT PANEL
DISPLAY

BASIC OPERATION

ADVANCED SETUP
ABOUT ADVANCED FEATURES

& OPERATION

WARRANTY

2
3

9

10

16
25

Page 1

CAUTION

WARNING

SELECTING THE HEAT
OR COOL MODE

5

Follow Installation Instructions
carefully. Disconnect Power
to the Heater/Air Conditioner
before removing the old therm­ostat and installing the new
thermostat.

Copyright 2007, International

Environmental Corp. All Rights Reserved

72

74

70

COOL

HEAT

AUTO

Front Panel

Page 2

Liquid Crystal Display

with Thermoglow

Up/Down Buttons

Mode Button

Fan/Override Button

Heat or Cool Indicator

Heat = Red, Cool = Green

1

1

2

3

4

5

2

3

4

5

Display

OUTSIDE

unoccupied

1

2

3

4

Mode Indicators - Page 5-8
Selects the operational mode of the equipment.

HEAT - Indicates the heating mode.
COOL - Indicates the cooling mode.
AUTO - Indicates the system will automatically

changeover between heat and cool modes
as the temperature varies.

OFF - Indicates heating and cooling are turned off.

Room Temperature Display
Indicates current room temperature.

Desired Set Temperature - Page 9
Indicates desired room temperature(s).

Setup icon - Pages 10-14
Indicates the thermostat is in the advanced setup
mode.

1

1

1

2

3

4

3

Page 3

Display

OUTSIDE

unoccupied

1

2

3

4

Mode Indicators - Page 5-8
Selects the operational mode of the equipment.

HEAT - Indicates the heating mode.
COOL - Indicates the cooling mode.
AUTO - Indicates the system will automatically

changeover between heat and cool modes
as the temperature varies.

OFF - Indicates heating and cooling are turned off.

Room Temperature Display
Indicates current room temperature.

Desired Set Temperature - Page 9
Indicates desired room temperature(s).

Setup icon - Pages 10-14
Indicates the thermostat is in the advanced setup
mode.

1

1

1

2

3

4

3

Page 3

Display

OUTSIDE

unoccupied

5

6

7

8

5

6

7

8

Fan icon - Page 9

Indicates fan operation.

Fan = low speed
Fan = medium speed
Fan = high speed

When only the Fan icon is displayed, the fan is in
the Auto mode and will run only when necessary to
heat or cool.

Locked icon - Page 21
Indicates keypad has been locked.

Outside icon - Pages 13 & 22
Indicates the temperature displayed is from the
optional outside sensor.

Unoccupied icons - Pages 13-14
Indicates a dry contact forced Unoccupied time
period is in effect.

Page 4

70

68

HEAT

70

76

COOL

70

76

68

COOL

HEAT

AUTO

70

OFF

Press

MODE

Press

Press

MODE

MODE

Page 5

The HEAT setting indicates

the temperature the room

has to reach before the
heating source will turn

on to heat the room.

Heating Only

The COOL setting indicates

the temperature the room

has to reach before the

cooling source will turn

on to cool the room.

Cooling Only

OFF indicates both heating

and cooling are turned off.

Off

AUTO will automatically

select heat or cool based

on room temperature

demand.

Heating or Cooling

Select Mode by Pressing the MODE Button

Selecting the Heat or Cool Mode 4-Pipe Operation

70

68

HEAT

70

76

COOL

70

76

68

COOL

HEAT

AUTO

70

OFF

Press

MODE

Press

Press

MODE

MODE

Page 5

The HEAT setting indicates

the temperature the room

has to reach before the
heating source will turn

on to heat the room.

Heating Only

The COOL setting indicates

the temperature the room

has to reach before the

cooling source will turn

on to cool the room.

Cooling Only

OFF indicates both heating

and cooling are turned off.

Off

AUTO will automatically

select heat or cool based

on room temperature

demand.

Heating or Cooling

Select Mode by Pressing the MODE Button

Selecting the Heat or Cool Mode 4-Pipe Operation

Heat Only

Step #4 = 1 in the Advanced Setup section,
page 11.

70

68

HEAT

70

OFF

Press

MODE

Selecting the Heat or Cool Mode 2-Pipe Operation

The HEAT setting indicates

the temperature the room

has to reach before the
heating source will turn

on to heat the room.

Heating Only

OFF indicates both heating

and cooling are turned off.

Off

Page 6

Cool Only

Step #4 = 2 in the Advanced Setup section,
page 11.

70

OFF

Press

MODE

70

76

COOL

Selecting the Heat or Cool Mode 2-Pipe Operation

The COOL setting indicates

the temperature the room

has to reach before the

cooling source will turn

on to cool the room.

Cooling Only

OFF indicates both heating

and cooling are turned off.

Off

Page 7

Cool Only

Step #4 = 2 in the Advanced Setup section,
page 11.

70

OFF

Press

MODE

70

76

COOL

Selecting the Heat or Cool Mode 2-Pipe Operation

The COOL setting indicates

the temperature the room

has to reach before the

cooling source will turn

on to cool the room.

Cooling Only

OFF indicates both heating

and cooling are turned off.

Off

Page 7

HEAT indicates the temperature
the room has to reach before the
heating source energizes. If the
water supply is cold, this screen
and heating would be locked out.

COOL indicates the temperature
the room has to reach before the
cooling source energizes. If the
water supply is hot, this screen
and cooling would be locked out.

70

OFF

Press

MODE

Press

Press

MODE

MODE

Page 8

70

69

70

72

Note: If the water temperature is changed during the
year, the thermostat will then automatically lock out the
incorrect mode.

Heating and/or Cooling

Step #4 = 3 in Advanced Setup (page 11), and the
accessory changeover sensor (G100-71520306) is used.
Step #4 = 4 or 5 in Advanced Setup (page 11).
Operation is the same as a 4-pipe system (page 5).

Selecting the Heat or Cool Mode 2-Pipe Operation

70

72

69

If step #4 = 3, this

screen will not appear.

AUTO will automatically select
heat or cool based on the room
temperature demand.

OFF indicates both heating
and cooling are turned off.

Selecting Your Desired Temperature
(adjusting the setpoints)

Basic Operation

70

76

68

COOL

HEAT

AUTO

AUTO OR PROGRAM MODE

Pressing the UP or DOWN button in Auto or Program
mode will adjust both the heat and cool set temperatures
simultaneously.

buttons.

Adjust the desired

set temperature with the

Fan Operation

Press

FAN

Press

FAN

Press

FAN

Press

FAN

Press

FAN

Low Speed Medium Speed

High Speed Auto

Fan

Pressing the FAN button will run the fan in
low, medium, or high speed continuously
(see below and page 20).

When only the Fan icon is displayed, the fan
is in the Auto mode and will run only when
necessary to heat or cool (see below and
page 20).

Note: If the thermostat is placed in the Off mode, the fan
will de-energize (see page 5).

Fan Fan Fan

Page 9