Ranco EcoCool E7 Series Operating and maintenance instructions

1
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
354-00027-001 Rev. D
Temperature and
Defrost Controller
Type E7
EcoCool™Controller and Configuration Software
Installation and Configuration

2
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
CONTENTS
1 How to use this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 E71R and E72R controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1 Installing the controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1.1 Wiring the controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Mounting the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 Wiring the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Functions and features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1.1 User control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1.2 Control mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1.3 Status indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1.4 Defrost control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1.5 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.5.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.5.2 Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1.6 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.7 Sensor failure mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6 Device and software configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1 Controller and interface box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1.1 Interface box overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1.2 Connect the interface box to the computer and E71R or E72R controller. . . . . . . . . . . . . . . . . . . . . . . . 14
6.2 EcoCool configuration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.1 Minimum computer requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.2 Software overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.3 Install and start EcoCool configuration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.4 Uninstalling EcoCool configuration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.5 Tabbed configuration parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2.5.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2.5.2 Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2.5.3 Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2.5.4 Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2.5.5 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.5.6 Fault. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.2.5.7 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2.5.8 Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
6.2.6 Saving and opening configuration files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2.7 Transferring configuration files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2.7.1 Downloading a configuration file to a controller from EcoCool configuration software: . . . . . . . 24
6.2.7.2 Uploading a configuration file from a controller to EcoCool configuration software: . . . . . . . . . 24
6.2.8 Transferring firmware between EcoCool configuration software and a controller . . . . . . . . . . . . . . . . . . 25
6.2.8.1 Installing firmware on a controller using EcoCool configuration software:. . . . . . . . . . . . . . . . . 25
6.2.8.2 Uploading firmware from a controller:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.2.9 Generating reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.2.10 Restoring default values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.3 Copy card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.3.1 Transferring firmware between a copy card and EcoCool configuration software . . . . . . . . . . . . . . . . . 26
6.3.2 Downloading a configuration from EcoCool configuration software into a copy card . . . . . . . . . . . . . . . 27
6.3.3 Uploading a configuration from a copy card into EcoCool configuration software . . . . . . . . . . . . . . . . . 27
6.3.4 Installing firmware or a configuration file into a controller from a copy card . . . . . . . . . . . . . . . . . . . . . 27
7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.1 Electrical rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 Temperature control range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.3 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.4 Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.5 Environmental requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.6 Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.7 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9 Responsibility and residual risks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4
1 HOW TO USE THIS MANUAL
The following conventions are used in this manual.
Callout column:
Callouts on the topics described are placed to the left of the text to allow the user to find the desired information quickly.
Icons
Some parts of the text are highlighted using icons that have the following meanings:
NOTE: Draws attention to a specific topic that users should take into account.
TIP: Highlights a suggestion that helps users to understand and use the information on the topic described.
WARNING: Highlights information that may damage the system or place persons, equipment, data, etc at risk if not known. These sections must
always be read prior to use.
2 INTRODUCTION
The E71R and E72R EcoCool™controllers are microprocessor based electronic temperature and defrost controllers for use in compressor-driven commercial
freezers and refrigerators. The E71R includes one relay for a refrigeration compressor or refrigeration solenoid valve. The E72R includes one relay for a
refrigeration compressor or refrigeration solenoid valve and one relay for a defrost heater and optional fan.
3 E71R AND E72R CONTROLLERS
3.1 Overview
E71R / E72R Controller
WARNING: A separate switch must be installed to disconnect the controller, compressor, and fan from line voltage for service.
Both controllers allow configuration of cut-in and cut-out temperatures and defrost scheduling for precise temperature control. An adjustment knob allows
the user to select a configured cold setpoint, warm setpoint, or any setpoint within this range. Optionally, the adjustment knob also can be configured with
ON/OFF functionality to power off the controller for non-service purposes. To prevent setpoint adjustment with the adjustment knob, a fixed setpoint can be
configured. The E71R and E72R can defrost the evaporator using an off-cycle defrost that powers off the compressor for a specified time period or until a
specified evaporator temperature is reached. Additionally, the E72R includes a second relay that can be used to energize a defrost heater or reverse cycle
solenoid valve to defrost the evaporator coil. Controller configuration is designed on a computer using EcoCool configuration software and is downloaded into
the controller from the computer or a copy card.
Three status LEDs (red, yellow, and green) display the system status. Temperature and fault alarms, defrost status, and compressor operation are indicated
by the LEDs.
An optional remote digital display shows the control temperature and, during adjustment, changes to the setpoint. It can be configured to show for the
duration of the defrost cycle the actual temperature, the temperature that was sensed at the moment the defrost cycle started, or dF. The display also
includes three system status LEDs.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
ED1
Callout
Column
Icons

5
Optional Display
To minimize temperature alarms during start up, defrost, and temperature fluctuations, alarm delay timers can be configured. The controllers can be
configured to start defrosting based on the elapsed system-on time, the accumulated run time of the compressor, or the difference in temperature between
the evaporator sensor and the control sensor. Defrosting can be terminated by elapsed time, the evaporator or control temperature sensor, or by a
temperature switch. If the control temperature sensor fails, the compressor can be powered on, powered off, or follow a configured duty cycle.
The controllers include the following physical features:
• Knob for setpoint adjustment
• Two temperature sensor inputs for a control probe and an evaporator probe
• One digital input for an optional defrost termination switch
• E71R Controller: One relay for a refrigeration compressor
• E72R Controller: One relay for a refrigeration compressor and one relay for a defrost heater and fan
• 90V to 240V AC switching power supply
• Connection for configuration or optional display
• Plastic enclosure and compact size for easy installation in most appliances
• Customizable control parameters
• Flash-memory microprocessor for quick and inexpensive configuration and firmware downloads at the factory or in the field
• Adjustable mounting clips for panel or bracket mounting
4 INSTALLATION
4.1 Installing the controller
The controller can be mounted in a panel cutout with the LEDs showing, mounted behind a panel with only the adjustment shaft exposed, or mounted
completely within the case.
To mount the controller with the face exposed, cut a 2 26/32” by 1 5/32” (71 mm x 29 mm) hole in the panel. Insert the controller from the outside of the
panel and slide a mounting clip onto each side of the controller from behind the panel.
Optionally, the controller can be mounted to a bracket inside the case.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
2 26/32” (71 mm)
1 5/32”
(29 mm)
Exposed Face
Cut-out

6
4.1.1 Wiring the controller
WARNING: Before wiring the controller, make sure that the refrigeration unit, fan, heater, and controller are not connected to the electrical supply.
Do not apply voltage to the digital input.
WARNING: If the compressor and a fan are connected to the same relay on the controller, the total current drawn by the compressor and fan must
not exceed the value shown in section 8.4 Terminations.
Use insulated spade connectors to connect the controller to the output loads. If your line voltage uses a neutral line and a phase line, connect the phase line
to the phase terminal(s) on the controller. Line 1 and Line 2 connections on the controller are not phase dependent. Connect the control sensor, optional
evaporator sensor, and optional defrost termination switch using the screw terminal block.
E71R with Control Sensor and Optional Evaporator Sensor
E72R With Control Sensor, Optional Evaporator Sensor, Defrost Heater, and Defrost Fan
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
E71R
Wiring Example
E72R
Wiring Example

7
4.2 Mounting the display
The optional display can be flush mounted in a panel cutout up to 30ft (10m) from the controller. To mount the display flush to the panel, cut a 2.32” by 1”
(64mm x 31mm) hole in the panel. Insert the display from the outside of the panel. Friction tabs on the sides of the display hold it in place.
4.3 Wiring the display
Use the Interface Box, Copy Card, and Display TTL Connector on the controller to connect to the display.
5 FUNCTIONS AND FEATURES
5.1.1 User control
The adjustment knob can be rotated to select any control temperature within the configured range.
The OFF and ON positions of the adjustment knob can be set to specific angles relative to full counter clockwise. Rotating the adjustment knob fully counter
clockwise (to OFF) powers off the controller and compressor immediately. However, hazardous voltage remains. The controller, compressor, defrost heater,
and defrost fan must be disconnected, prior to service, using a separate switch. If the On/Off Function is enabled and the knob is in the OFF position, rotating
the knob clockwise powers on the controller.
5.1.2 Control mode
The controller cycles the compressor or refrigeration solenoid valve to maintain the selected control temperature.
The warm and cold adjustment knob positions are configured using four setpoints. Cut-In Warm and Cut-Out Warm are the setpoints for the warm position.
Cut-In Cold and Cut-Out Cold are the setpoints for the cold position. The cold position is full clockwise rotation. The warm position is full counter clockwise
rotation or, if the On/Off Function is enabled, the specified angle. When the user sets the adjustment knob to a setpoint between the warm and cold
positions, the Cut-In and Cut-Out setpoints are calculated by the controller. The setpoints can be configured using Celsius or Fahrenheit units.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
ED1
2.32” (58.9 mm)
1”
(25.4 mm)
Cut-In
Cut-Out
User selected
Cut-In and Cut-Out Setpoints
Cut-In Cold Setpoint
Cut-In Warm Setpoint
Cut-Out Cold Setpoint
Cut-Out Warm Setpoint
User Selected
Position
Knob Position
Cold Position
Warm Position
OFF
T
e
m
p
e
r
a
t
u
r
e
Display
Mounting
Cut-out
Differentials

8
When the adjustment knob is set to the warm position and the controlled space temperature is equal to or greater than the Cut-In warm setpoint, the
compressor or solenoid valve is energized until the controlled space temperature is equal to or less than the Cut-Out warm setpoint. Similarly, when the
adjustment knob is set to cold, the compressor or solenoid valve is energized when the temperature is equal to or greater than the Cut-In cold setpoint and
de-energized when the temperature is equal to or below the Cut-Out cold setpoint. For adjustment knob positions between warm and cold, the controller
interpolates the cut-in and cut-out setpoints from the four configured setpoints.
The optional display changes from the control temperature to the Cut-Out setpoint during adjustment and reverts to the control temperature three seconds
after adjustment. Because the four setpoints are configured independently, the differential can remain constant or change linearly between the cold and
warm settings.
Refer to the graphs below for various setting scenarios.
The compressor can be protected against short cycling by three time delays. The Compressor Minimum Off Time at Start delay begins counting down
when the controller is powered on. The compressor cannot be powered on before this delay expires. If the ON/OFF function is enabled, the timer does not
count down while the adjustment knob is in the OFF position. When the compressor is powered on the Compressor Minimum On Time delay begins
counting down. The compressor is not powered off by the controller before this delay expires regardless of the control temperature or setpoint. However, if
the adjustment knob is rotated to OFF the controller and compressor are immediately powered off. When the controller powers off the compressor, the
Compressor Minimum Off Time delay begins counting down. The compressor is not powered on before this timer expires regardless of control temperature
or setpoint.
TIP: An excessive Compressor Minimum On Time or Compressor Minimum Off Time can force the temperature past an alarm threshold and trigger a
temperature alarm.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
Cut-In
Cut-Out
Warm
Position
Setpoints
Cold
Position
Setpoints
T
e
m
p
e
r
a
t
u
r
e
Adjustment Knob Setpoint Range
Variable Differential
Cut-In
Cut-Out
Warm
Position
Setpoints
Cold
Position
Setpoints
T
e
m
p
e
r
a
t
u
r
e
Adjustment Knob Setpoint Range
Wide Differential
Cut-In
Cut-Out
Warm
Position
Setpoints
Cold
Position
Setpoints
T
e
m
p
e
r
a
t
u
r
e
Adjustment Knob Setpoint Range
Narrow Differential
Cut-In
Cut-Out
Warm
Position
Setpoints
Cold
Position
Setpoints
T
e
m
p
e
r
a
t
u
r
e
Adjustment Knob Setpoint Range
Constant Cut-In
Cut-In
Warm
Position
Setpoints
Cold
Position
Setpoints
T
e
m
p
e
r
a
t
u
r
e
Adjustment Knob Setpoint Range
Fixed Setpoint
Cut-Out

9
5.1.3 Status indications
Three LEDs in the face of the controller indicate the status of the controller. The green LED illuminates while the compressor is powered on. The yellow LED
illuminates while the controller is in a defrost cycle. The red LED illuminates if the control temperature exceeds an alarm threshold or flashes if a
temperature sensor circuit is shorted or open. The remote display includes three red LEDs that provide the same indications (see 5.1.6 Display).
5.1.4 Defrost control
The defrost functionality can be based on the appliance operating time between defrosting cycles, the accumulated compressor run time between defrosting
cycles, or it can be disabled. If the Defrost Function is disabled, all defrosting features are disabled.
The controller can start a defrost cycle when it is powered on or after the expiration of the Time to First Defrost delay. If Defrost Cycle at Power On is
enabled, the controller starts a defrost cycle when it is powered ON or after a power interruption (power cycle). If Defrost Cycle at Power On is disabled, the
Time to First Defrost timer starts counting down when the controller is powered on. The controller starts a defrost cycle when the timer expires. After the
completion of the first defrost cycle, the Time to subsequent defrosts timer starts counting down. When it expires, defrost starts. At the end of the defrost
cycle, the timer resets and restarts.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
Cut-In
Cut-Out
T
e
m
p
e
r
a
t
u
r
e
Time
Controller
Power on
Compressor
Minimum
Off Time
at Startup
Compressor
Minimum
On Time
Compressor
Minimum
On Time
Compressor
Minimum
OFF Time
C
ompr
e
Mi
n
i
m
u
On Tim
e
ON ONOFF
e
ssor
u
m
e
OFF OFF
Compressor or Refrigeration
Defrost Cycle
T
emperature or
Sensor Alarm
Compressor
Powered On
Typical
Compressor
Cycles

10
The controller can also be configured with a Temperature Initiated Defrost Function to start defrosting if it senses too great a difference between the
control temperature and the evaporator temperature. Temperature Initiated Defrost Time Delay begins counting down if the evaporator temperature is less
than 32ºF (0ºC) and an excessive temperature difference is sensed. Defrost starts if the temperature difference still exists when the delay expires. This
temperature initiated defrost delay prevents defrost from starting if the air space temperature temporarily increases (e.g. the door is left open). The
temperature difference and delay are both configured.
Temperature Initiated Defrost Time Delay after Defrost begins counting down when refrigeration starts after defrost. This delay is typically longer than
Temperature Initiated Defrost Time Delay to prevent another defrost before the sensed temperatures return to normal. When Temperature Initiated Defrost
Time Delay after Defrost expires, the controller resumes use of Temperature Initiated Defrost Time Delay as described above. Temperature Initiated Defrost
Time Delay after Defrost permits a shorter Temperature Initiated Defrost Time Delay without the risk of starting defrost due to a lagging control temperature
after defrost.
Temperature initiated defrost is independent of time initiated defrost and can start before the Time to subsequent defrosts timer expires.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
Cut-In
Defrost Termination Temp
Cut-Out
T
e
m
p
e
r
a
t
u
r
e
Time
Controller
Power on
Compressor or Refrigeration
ON ON ONOFF OFF OFF ON OFFOFF
Compressor
Minimum On
Time
Time to
First Defrost
Time to
Subsequent Defrosts
Defrost
Termination
Cut-In
Defrost Termination Temp
Cut-Out
T
e
m
p
e
r
a
t
u
r
e
Time
Defrost Delay Defrost Delay
After Defrost
(Defrost Prohibited)
Control Minus Evaporator
Starts Defrost Delay
Evaporator
Sensor
Control
Sensor
Defrost Termination
Defrost Start
Time Initiated
Defrost
Temperature
Initiated Defrost

11
The E71R controller allows only off-cycle defrost by powering off the compressor. The E72R controller includes the following Defrost Method options:
•Off Cycle: powers off the compressor
•Electric: powers off the compressor and powers on a heating element
•Reverse Cycle: powers on the compressor and powers on a valve that reverses the cooling cycle to pump heat into the evaporator coil
Defrost heat and an optional evaporator fan are controlled by the second relay on the E72R.
When defrosting begins, the Defrost Duration timer starts counting down real time. Defrosting ends when one of the following occurs, depending on
your configuration:
• The Defrost Duration timer expires
• The control temperature increases to the Defrost Termination Temperature
• The evaporator temperature (evaporator sensor) rises to the Defrost Termination Temperature
• The optional defrost termination switch is closed
If evaporator or control sensor termination is enabled, defrosting can terminate before the Defrost Duration timer expires. In this case the timer serves
as a failsafe.
When defrost is terminated, the optional Drip Time delay starts counting down. If the E72R is being used, the defrost relay switches position: The defrost
heater is powered off or the reverse cycle solenoid returns to the cooling position, and the evaporator fan is powered on. The compressor is not powered on
until the Drip Time delay expires. If the E71R is being used, the compressor remains powered off during the drip time. This delay is used primarily with
electrical or reverse cycle defrost to allow water removal between terminating heat and powering on the compressor. When the Drip Time delay expires, the
Time to subsequent defrosts timer resets and begins counting down to the next defrost cycle.
With both the Time to subsequent defrosts timer and the Temperature Initiated Defrost Function enabled the appliance is protected against excessive ice
buildup, which may accumulate quickly in abnormally high humidity environments.
5.1.5 Alarms
If the controlled temperature exceeds an alarm threshold or a sensor circuit fails, the red alarm LEDs on the controller and optional display indicate the type
of fault that has occurred. Additionally, the optional display identifies a sensor failure. The table below shows faults and indications.
5.1.5.1 Temperature
If temperature alarms are enabled, four setpoints define the high and low temperature alarms for the cold and warm positions. Similar to the temperature
setpoint, the high temperature alarm threshold is interpolated across the adjustment range from the configured high temperature alarm cold and high
temperature alarm warm setpoints. The low temperature alarm threshold is interpolated from the low temperature alarm setpoints at the cold and warm
positions. The Temperature Alarm Differential prevents alarm cancellation until the control temperature returns past the alarm threshold by the amount of
the differential. A high temperature alarm remains on until the temperature decreases to less than the high temperature alarm minus the differential. A low
temperature alarm remains on until the temperature increases to more than the low temperature alarm plus the differential.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
Fault Display Red Alarm LED
Temperature Alarm Control sensor temperature Illuminated
Control Sensor Circuit Failure E1 Flashing
Evaporator Sensor Circuit Failure Alternates between E2 and the control sensor temperature Flashing
Cut-In
Cut-Out
Cut-In Cold
Cut-In Warm
High Temperature Alarm
Warm Setpoint
Low Temperature Alarm
Warm Setpoint
High Temperature Alarm
Cold Setpoint
Low Temperature Alarm
Cold Setpoint
Cut-Out Warm
Cut-Out Cold
Temperature Alarm Differential
Temperature Alarm Differential
Cold Position
Warm Position
OFF
Adjustment Knob Position
Temperature Alarm
Temperature Alarm
Alarm Cancellation
Alarm Cancellation
T
e
m
p
e
r
a
t
u
r
e
Alarm LED
Indications
Setpoints

12
If the control temperature crosses an alarm threshold, the Temperature Alarm Time Delay begins counting down. If the timer expires and the temperature
has not returned past the alarm differential, the red alarm LED on the controller (and optional display) illuminates. If the control temperature returns past the
threshold by the amount of the differential before the alarm delay expires, the pending alarm is cancelled, and the timer is reset. When the temperature
returns past the threshold by the amount of the differential the alarm is cancelled and the Temperature Alarm Time Delay is reset. The Temperature Alarm
Time Delay reduces the possibility of temperature fluctuations causing false alarms.
A Temperature Alarm Disable Time after Start up timer prevents alarms while the appliance decreases the temperature after being powered on. A
Temperature Alarm Delay After Defrost prevents false alarms while the appliance decreases the temperature after defrost. This allows for a shorter
Temperature Alarm Time Delay and a longer delay time after defrost only.
5.1.5.2 Faults
If a sensor circuit is shorted or open, the Sensor Fault Monitoring Time timer starts counting down. If the timer expires before the fault is corrected the red
alarm LED flashes. Refer to 5.1.7 Sensor failure mode. When the fault is fixed, the timer resets and the red alarm LED is extinguished (if a temperature alarm
is in effect the LED is illuminated). If a sensor failure alarm and a temperature alarm occur at the same time, the red alarm LED flashes to indicate the
sensor failure.
During a control sensor failure, the optional display shows E1.
During an evaporator sensor failure, the optional display shows E2 for one second, the temperature of the control sensor for three seconds, and repeats.
If both sensors fail, the display shows E1.
NOTE: When the controller is powered on, an LED flashing sequence indicates that the controller firmware is operating properly. Each LED flashes for
one second in sequence and then all three illuminate for two seconds. If the red alarm LED remains illuminated after the controller is powered
on, a check sum error has occurred and the controller’s firmware must be updated using a computer and the interface box or a copy card (refer
to 6.2.8) No additional external alarm indication is available.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
High Temperature Alarm
Cut-In
Cut-Out
T
emperature Alarm Differential
Low Temperature Alarm
T
emperature Alarm Differential
T
e
m
p
e
r
a
t
u
r
e
Time
Temperature Alarm
Time Delay starts
Temperature Alarm
Time Delay
Temperature Alarm
Activated
Alarm Cancelled
ED1
ED1
Temperature
Alarms
Sensor Failure

13
5.1.6 Display
The optional display has two digits, a negative sign, and three status LEDs. It displays the range -99 to 99 and the characters dF. Normally the display shows
the control sensor temperature. The display shows the selected cut-out setpoint during adjustment and for three seconds after the adjustment is made.
Sensor faults, temperature alarms, compressor or solenoid valve operation, and defrost are indicated by the display LEDs as they are by the controller LEDs.
5.1.7 Sensor failure mode
If a sensor circuit becomes shorted or open, the Sensor Fault Monitoring Time timer begins counting down. If the timer expires before the fault is
corrected, the controller issues an alarm (refer to 5.1.5 for display indication) and uses the configured Sensor Failure Mode to power off, power on, or duty
cycle the compressor. The compressor on time and compressor off time of the duty cycle can be configured. When fault is fixed, the timer resets and the
alarm is cancelled.
Duty Cycle
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
ED1
Defrost Cycle
Temperature or
Sensor Alarm
Compressor
Powered On
On
Off
Compressor or
Refrigeration
Status
Time
Compressor
Off Time If
sensor Failed
Compressor
On Time If
sensor Failed
Off On Off On
Sensor Failure
Protection

14
6 DEVICE AND SOFTWARE CONFIGURATION
6.1 Controller and interface box
6.1.1 Interface box overview
The interface box allows communication between the controller and a computer for configuration download and upload and for firmware installation.
6.1.2 Connect the interface box to the computer and E71R or E72R controller
Connect the power adapter to the interface box and plug in the adapter.
Connect the interface box to the computer using either the RS232 db9 serial cable OR the USB to RS232 db9 converter cable (shown in blue below).
Ensure that the controller is not connected to power; power is supplied by the interface box.
Connect the controller to the interface box.
WARNING: The controller must not be connected to power while configuring it with the interface box.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION
RS-232 DB-9
Connector
Power Jack
Interface Box
Cable Connection
Copy Card Jack

15
6.2 EcoCool configuration software
6.2.1 Minimum computer requirements
To use the EcoCool configuration software your computer must meet or exceed the following minimum requirements:
• Processor: Intel®Pentium®4 500 MHz
• Operating System: Microsoft® Windows® XP or Microsoft Vista®
• RAM: 64 MB
• Physical port: Available db9 RS232 or USB 1.0
6.2.2 Software overview
Use the EcoCool configuration software to configure and save controller configurations, download a configuration file to a controller, upload a configuration
file from a controller, create configuration reports, or update the controller firmware. To simplify configuration, there are eight parameters tabs.
6.2.3 Install and start EcoCool configuration software
Insert the EcoCool configuration software CD into your computer.
Open the EcoCool configuration software folder on the CD, click the setup.exe icon, and follow the installation prompts.
To start EcoCool configuration software click Start, select EcoCool configuration software, and click E72R.
NOTE: The EcoCool configuration software can be used without connecting the interface box to your computer.
6.2.4 Uninstalling EcoCool configuration software
To remove EcoCool configuration software from your computer, open the Add or Remove Programs control panel and select EcoCool configuration software.
After uninstalling EcoCool configuration software the EcoCool configuration software folder, containing configuration and reports subdirectories, remains in
the Program Files directory. To completely uninstall EcoCool configuration software, manually delete the EcoCool configuration software folder from the
Program Files directory. All configuration files and reports are erased when the EcoCool configuration software folder is deleted.
TIP: All configuration files and reports are erased if the EcoCool configuration software folder is deleted.
6.2.5 Tabbed configuration parameters
Select from the eight tabs on the left side of the program to create or edit programs for the controllers.
•Configuration: temperature units, defrost method, sensor use, adjustment knob on and off positions
•Setpoints: compressor cut-in (power on) and cut-out (power off) temperatures for adjustment knob warm and cold positions
•Compressor: short cycle prevention timers
•Display: display behavior during defrost cycles and temperature offset
•Fan: fan operation during compressor off cycle (for higher temperature application without defrost)
•Alarm: temperature and timer settings for excessively high or low temperatures
•Fault: controller response to sensor failure
•Defrost: defrost timer, temperature, and failsafe parameters
Settings made on one tab can affect parameters on other tabs. If a change causes a parameter on another tab to be disabled a popup window indicates
the change.
Changed parameter popup window:
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION

16
6.2.5.1 Configuration
Use the configuration tab to specify the general operation of the controller and the controller’s use of parameters that are programmed on other tabs.
Controller Operation temperature Units
Select Fahrenheit or Celsius as the unit of temperature measurement and control. Changing this parameter changes the temperature unit throughout the
controller program and recalculates temperature values shown in the tabs and on the display.
Defrost Method
Select the method of defrosting to be used. Defrosting is started according to the parameters on the Defrost tab.
•Electric can be used by the E72R controller to control the defrost relay during a defrost cycle. The E71R does not have a defrost relay, but powers off
the compressor during an electric defrost.
•Off Cycle can be used by the E71R and E72R controllers to cause the compressor to remain powered off for the duration of the defrost cycle.
•Reverse Cycle can be used by the E72R controller to actuate a solenoid valve that reverses the cooling cycle to act as a heat pump to defrost
accumulated ice. The compressor remains powered on during defrost.
Evaporator Temperature Sensor
Select Enabled if the controller is using an evaporator temperature sensor (see 5.1.4 Defrost Control). Select Disabled if the controller is not using an
evaporator temperature sensor.
NOTE: If Enabled is selected and an evaporator temperature sensor is not connected to the controller, the controller indicates a sensor failure.
Defrost Termination Method
• Select Disable to force defrost to terminate only due to elapsed time (Defrost Duration on the Defrost tab).
• Select Evaporator Sensor to use the sensed evaporator temperature to end defrosting (Defrost Termination on the Defrost tab).
• Select Control Sensor to use the control temperature to end defrosting (Defrost Termination on the Defrost tab).
• Select Switch (NO) to use a separate normally open defrost termination switch. Defrost is terminated when the switch is closed. If Switch is selected,
the controller will still end a defrost cycle based on the elapsed time even if the switch is not closed.
If either sensor is selected, enter the Defrost Termination Temperature for the sensor on the Defrost tab. The selection of Defrost Termination Method
does not affect how defrosting starts or the Temperature Initiated Defrost Function on the Defrost tab.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION

17
On/Off Function
Select Enable to allow the adjustment knob to power off the compressor and controller and to adjust the setpoint. Select Disabled to allow only setpoint
adjustment by the adjustment knob.
Potentiometer (Adjustment Knob)
These settings are unavailable if On/Off Function is disabled. Enter the Potentiometer Off Position to set the angle of the adjustment knob, relative to full
counter clockwise, that powers off the controller and compressor. Enter the Potentiometer On Position to set the angle of the adjustment knob, relative to full
counter clockwise, that powers on the controller.
6.2.5.2 Setpoints
Use the Setpoints tab to specify the controller setpoints - refrigeration Cut-In and Cut-Out values during normal operation.
NOTE: To define a fixed non-adjustable setpoint, configure the Cut-In Warm setpoint equal to the Cut-In Cold setpoint. Configure the Cut-Out Warm setpoint
equal to the Cut-Out Cold setpoint. Refer to the Fixed Setpoint graph in section 5.1.2.
Cut-In Warm
Specify the setpoint that causes the compressor to power on when the adjustment knob is set to the warm position (counter clockwise).
Cut-Out Warm
Specify the setpoint that causes the compressor to power off when the adjustment knob is set to the warm position (counter clockwise).
Cut-In Cold
Specify the setpoint that causes the compressor to power on when the adjustment knob is set to the cold position (clockwise).
Cut-Out Cold
Specify the setpoint that causes the compressor to power off when the adjustment knob is set to the cold position (clockwise).
Cut-in and cut-out setpoints for positions between warm and cold are calculated as linear interpolations from the configured cold and warm setpoints.
NOTE: If the On/Off Function is enabled on the Configuration tab, the Potentiometer On Position specifies the adjustment knob angle that selects the warm
setpoint.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION

18
6.2.5.3 Defrost
Use the Defrost tab to specify the conditions that cause defrosting to start and end.
Defrost Function
Define the defrost schedule timing interval or disable the defrost function. Selecting System Run Time specifies that the time interval between defrost (Time
to subsequent defrosts) is defined by the time that the controller is powered on and restarts if the controller is power cycled. Selecting Compressor Run
Time specifies that the defrost timing interval is defined as the accumulated time that the compressor is powered on and restarts if the controller is power
cycled. The defrost function can also be disabled.
NOTE: If you use Temperature Initiated Defrost, you must still select System Run Time or Compressor Run Time as a failsafe maximum time between
defrosting cycles.
Defrost Cycle at Power On
Select Enable to start a defrost cycle each time the controller is switched on or the appliance is power cycled in addition to the scheduled and temperature
initiated defrost cycles. Select Disable to only allow scheduled and temperature initiated defrosting.
Defrost Termination Temperature
Specifies the temperature that causes defrosting to end (and drip time to start – if drip time is defined). This is either the Control Sensor temperature or the
Evaporator Sensor temperature as chosen on the Configuration tab. This parameter is unavailable if the Defrost Function is disabled. If the defrost
termination method is based on the digital input Switch (NO) (set on the Configuration tab) this setting is disregarded by the controller.
WARNING: The controller terminates defrost when the digital input dry contacts close – Do not apply voltage.
Time to First Defrost
Specifies how long the controller waits before starting a defrosting cycle each time it is powered on. The timer that is used, System Run Time or Compressor
Run Time, is specified in Defrost Function. This parameter is unavailable if Defrost Cycle at Power On is enabled.
Time to Subsequent Defrosts
Specify how long the controller waits to start the second and subsequent defrost cycles after being powered on. The timer starts when the Drip Time timer
expires or, if drip time is not being used, when the defrost terminates either on failsafe time (Defrost Duration) or temperature (Defrost Termination
Temperature). A temperature initiated defrost cycle can occur before the Time to Subsequent Defrosts timer expires.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION

19
Defrost Duration
Specifies the maximum duration of a defrost cycle (also called failsafe). When the Defrost Duration time expires the defrost cycle ends and, if Drip Time is
configured, the Drip Time starts. If Drip Time is not configured, the controller immediately powers on the compressor and resumes refrigeration.
Drip Time
Specifies how long the controller waits to resume refrigeration after defrost. During drip time, the compressor and defrost relay (E72R only) are de-energized
to allow water to drip off of the coil.
NOTE: If the evaporator fan is wired to the NC contact on the defrost relay (E72R only), the fan will power on at the end of defrost. To delay the fan action
until drip time is expired use an external fan delay thermostat.
Temperature Initiated Defrost Function
Select Enable to allow defrost based on a comparison of the air space temperature and the evaporator temperature. Specify the difference in sensed
temperature (control sensor minus evaporator sensor) that initiates defrosting. Enter the Temperature Initiated Defrost Time Delay to specify how long the
measured temperature difference must exist before defrost starts. Enter the Temperature Initiated Defrost Time delay after Defrost to specify how long
the controller waits after the termination of a defrost cycle or drip time (depending on configuration) before it allows a temperature initiated defrost. This
delay allows the sensed temperatures to return to normal before a temperature initiated defrost cycle can occur.
NOTE: Evaporator Temperature Sensor on the Configuration tab must be enabled to configure and use the Temperature Initiated Defrost Function.
6.2.5.4 Alarm
Use the Alarm tab to specify temperature conditions that illuminate the alarm LED on the controller and on the display.
Temperature Alarm Enable
Select Enable to enable temperature alarms or select Disable to disable the setting and display of temperature alarms.
NOTE: Temperature Alarm Enable does not affect alarms due to a control or evaporator sensor short or open circuit, or a firmware (check sum) error.
High Temperature Alarm – Warm Position
Specifies the sensed high temperature setpoint that causes an alarm when the adjustment knob is in the warm position. Control sensor temperatures equal
to or greater than this threshold cause an alarm when the adjustment knob is in the warm position.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION

20
Low Temperature Alarm – Warm Position
Specifies the sensed low temperature setpoint that causes an alarm when the adjustment knob is in the warm position. Control sensor temperatures equal
to or less than this threshold cause an alarm when the adjustment knob is in the warm position.
High Temperature Alarm – Cold Position
Specifies the sensed high temperature setpoint that causes an alarm when the adjustment knob is in the cold position. Control sensor temperatures equal to
or greater than this threshold cause an alarm when the adjustment knob is in the cold position.
Low Temperature Alarm – Cold Position
Specifies the sensed low temperature setpoint that causes an alarm when the adjustment knob is in the cold position. Control sensor temperatures equal to
or less than this threshold cause an alarm when the adjustment knob is in the cold position.
If the user selects a control setpoint between the warm and cold positions, the alarm thresholds are calculated by the controller as linear interpolations from
the temperature
alarm setpoints.
Temperature Alarm Differential
Specifies the amount of temperature correction required to cancel a temperature alarm. A high temperature alarm is cancelled when the temperature is less
than the alarm threshold minus the differential. A low temperature alarm is cancelled when the temperature is greater than the low temperature alarm
threshold plus the differential.
Temperature Alarm Time Delay
Specifies the minimum time that a sensed control temperature must be beyond a temperature alarm threshold before a temperature alarm occurs.
Temperature Alarm Disable Time after Start up
Specifies how long temperature alarms are disabled after the controller is powered on.
Temperature Alarm Delay After Defrost
Specifies the maximum time delay before an alarm is activated when the control temperature is beyond an alarm threshold after defrost is terminated by
time or temperature or after drip time has ended - if used.
6.2.5.5 Compressor
Use the Compressor tab to set compressor protection delays for the minimum power on and power off periods for the compressor. These minimum time
periods can be used to protect the compressor against short cycling.
NOTE: Although the Compressor Minimum Off Time can be set as short as zero seconds, time should be provided to protect the compressor against short-cycling.
Type E7 EcoCool™ Electronic Temperature and Defrost Controllers
©2008 Invensys Controls All rights reserved.
DRAFT VERSION