ConfidenceInstall

Emerson Climate Technologies leads the industry with its state-of-the-art electronic solutions for commercial refrigeration market. Adding to its innovative line of electronic controllers, we are pleased to introduce our new EC1 series electronic display case and coldroom controllers. Easy to install and commission, EC1 series controllers help you run your refrigeration equipment more efficiently. The controllers work seamlessly with other relevant Emerson line components to give you the best refrigeration control solution in the market. With EC1 series, you’re truly in control of your business.

Choose Emerson. Install Confidence.

EMERSON is not to be held responsible for erroneous literature regarding capacities, dimensions, applications, etc. stated herein. Products, specifications and data in this literature are subject to change without notice. The information given herein is based on technical data and tests which EMERSON believes to be reliable and which are in compliance with technical knowledge of today. It is intended only for use by persons having the appropriate technical knowledge and skills, at their own discretion and risk. Since conditions of use are outside of EMERSON’s control we can not assume any liability for results obtained or damages occurred due to improper application.

This document replaces all earlier versions.

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Emerson Climate Technologies Flow Controls Asia Pacific Sales Offices

EC1 SeriesElectronic Controller for Display Case / Coldroom

Electrical Connection The EC1 series have built-in transformers for ease of installation (refer to selection chart). The controllers are double insulated and are supplied with a safety electrical cover. Caution should be made when removing this cover against electrical shock

The EC1 series uses non-removable screw connectors and will accept cables from 0.14 to 1.5mm²

AccessoriesThe EC1 Series are designed to operate using Emerson standard NTC temperature sensors. These are available in a variety of lengths (refer to table below).

The EC1 Programming Key can be used to upload a set of control parameters from one controller and then be easily downloaded to other controllers with a similar function. The process only takes a few seconds.

The EC1-Series forms a new generation of electronic controllers from Emerson for refrigeration applications. The controllers combine in the small industry standard housing the functionality to control the temperature, fan and defrost in a display case or coldroom.

Available versions are:EC1-233: Three relay version- Thermostat function for thermal expansion valve

(TXV) applications- Fan control function- Defrost control function

Features - Integral mains transformer: 230V- Air temperature control using standard Emerson

NTC sensors- Defrost control with dedicated termination

sensor - Fan management- Electrical connection screw terminals with cable

protection- 3 digit LED display with decimal point- Optional programming key for quick transfer of

control parameters into multiple controllers- Indicator LEDs for compressor, fan & defrost

operation- Display selectable °C / °F- Standard 71 x 29 mm cut-out dimensions- IP 65 protection class when mounted in front

panel- CE approval

Typical ordering package- EC1-233 Controller- 2 x Emerson NTC temperature sensors for air and

defrost control- Optional EC1-PK1 programming key

EC1 SeriesNominal voltage: 2 = 230VNumber of relays: 3 = 3 x Standard RelaysCommunication type: 3 = None

EC1- 2 3 3

Temperature ControlThe Emerson NTC air sensor (S1) is used for temperature control of the display case. The deadband control function is described in the diagram below.

The horizontal axis represents the temperature. If the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd), the compressor relay is activated. The vertical axis represents cooling operation (1=cooling, 0=no cooling) with the control set by an air temperature sensor typically mounted in the air return.

A control parameter allows switching off the evaporator fan during “no cooling”. i.e. S1 reaches the temp. setpoint (St).

The minimum compressor stop delay timer (C2) must elapse before the compressor can restart.

Selection Table

Introduction The EC1 series controllers are for use in commercial refrigeration systems, primarily to control the refrigeration circuit of display cases or coldrooms. The compressor relay output is designed to control the direct switching for integral display cases or allow for a pumpdown cycle in conjunction with a solenoid valve up-stream of the TXV. Primary function of the controller is to maintain the control temperature (air sensor) at a pre-determined setpoint together with fan and defrost management.

The EC1 series are used in more traditional refrigeration systems where TXVs are used to control superheat and would typically be used in stand alone applications.

ApplicationThe functions of the EC1 series display case / coldroom controllers are described in the functional diagrams below:

The air-in temperature sensor (7) controls the thermostat function with a deadband control loop. The defrost function is activated internally by fixed timing intervals for either electrical heater (3) or off-cycle (natural defrost) applications and is terminated using the dedicated temperature sensor (9) or the internal timer. The compressor relay (2) is controlled by the thermostat function and the fan (4) can be linked to the on/off control of the thermostat or remain permanently on. In case of power loss the controller will switch off automatically, creating an intrinsically safe system. A liquid line solenoid valve can be installed upstream of the TXV for pumpdown applications.

The EC1 series model is a traditional case controller with a thermostat for temperature control used in conjunction with conventional TXV (solenoid valve optional).

d4

1

0

Fd

1

0

d5

dl

or dtdPd7

1

0

//

Optional on/of f dur ing def ros t

/ /Optional on/of f dur ing c ooling

C2

//

/ /

d0 F1

Tem p. > S t + rd

Tem p. > S t + rd

Compressor Relay

FanRelay

DefrostRelay

If Sensor S5 < FstIf Sensor S5 > Fst and (S1-S5) > Ft : fans run

Parameters r1 & r2 are used to set min./max. setpoint.Alarms AL (Low Temp. Alarm Limit) and AH (High Temp. Alarm Limit) are active after delay time A1 has elapsed.The alarms are inhibited at start-up by delay timer A2.

Sensors Emerson NTC sensors are available with different cable lengths to meet specific customer's requirements for optimal positioning of the sensors. The Standard Sensor length is 1.5m. All sensors are hermetically sealed in a plastic housing for high reliability and long life. Sensors can be extended provided the connection between the sensor and the extension cable is hermetically sealed.

Compressor ControlThe compressor relay is activated when the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd). However, the minimum stop delay time must elapse before the compressor can start. After a defrost, both the Draindown Time (d7) and the Fan Start Delay (Fd) must elapse before the compressor relay can be reactivated.

Fan ControlDepending upon the application, during normal operation the fans can be designed to operate continuously or switch on/off with the cooling demand. i.e. when the control temperature reaches the setpoint (St), the fans switch off with the compressor relay.

In addition, the fans can remain on or off during the defrost cycle depending upon the requirements of the system.

1 EC1 Series Electronic Display Case / Coldroom Controller Technical Data

Display and KeypadDisplay indicates temperatures with 3 digits in the range of -45.5 to +110 and a resolution of 0.1 within a range of -45.5 to 99.9. The display unit can be switched from °C to °F. The °C symbol is lit and clearly displayed when applicable. Otherwise, the temperature is °F. When the units are changed, all temperature parameters in the controller need to be changed in the respective units.

Indicator LEDs show the status of compressor, fan, defrost and programming active. A blinking LED indicates that the EC1 controller is trying to fulfill a task, but is prevented from doing so by another restraint in the system, typically a delay timer. An example of this would be the minimum compressor run time. A fast blinking LED signifies a forced function, continuous cooling or manual defrost.

Operation and CommissioningSetup and commissioning of an EC1 series controller may be performed by using one of the following options:

- Locally through the 4-button keypad.- Downloading a control parameter set from an EC1

programming key. - Refer to accessories list.

For initial commissioning of a new installation the first EC1 can be commissioned via the dedicated menus with meaningful default values. Additional EC1 controllers with similar applications can be easily commissioned by uploading the parameter list from the first controller and then downloading it into subsequent controllers using the programming key.

Safety FunctionsVarious safety functions are available for use particularly when the EC1 is controlling the compressor directly. These safety features are used to prevent compressor damage and include a minimum compressor off time to prevent short cycling.

Safe operating modes allow the system to continue to operate safely even when the signal is lost from a defective or disconnected sensor. The controller can be programmed to run with constant run and stop times using parameters C3 and C4.

Emerson NTC Temperature Sensor EC1-PK1 programming Key

EC1 Series

EC1 Series Electronic Display Case / Coldroom Controller Technical Data 2

Type Part Code Nr.

Display Case / Coldroom Controller

Three relay version: temperature, fan and defrost control for TXV application with electrical or off-cycle defrost

EC1-233 803 488

Description Nominal 230VAC

----------------------------------------

rd

----

----

--

----

----

--

StAHAL

1

0

r1 r2EC1_Blockdiagr.cdr

Defrost ControlEC1 series controllers allow local defrost management through the built-in defrost timer. Two basic defrost modes are available:

Natural DefrostFor medium temperature applications without defrost heaters. In this mode the evaporator fans typically remain on during the defrost period.

Electrical Defrost All timing parameters can be selected to cover specific defrost modes. See the diagrams below for the function of compressor, defrost and fan output at defrost:

Defrost can be activated after power up (d4 flag) and the delay (d5). The defrost will end either when the defrost termination temperature (dt) has been exceeded or after the maximum defrost duration (dP). The draindown delay (d7) and the fan delay (Fd) must elapse before the system can restart. The next defrost will occur after the specified defrost interval (dI).

End of defrost is detected by the dedicated defrost temperature sensor (S5).

Fans can be switched off during a defrost (F1 flag).

DescriptionCable

LengthType PCN

NTC Sensors (Air type) 1.5m ECN-S15 804 304

(10kΩ a t 25°C ) 3.0m ECN-S30 804 305

6.0m ECN-S60 804 284

EC1 Programming Key EC1-PK1 804 390

Wiring Diagrams

Dimensions (MM)

Technical Data

Supply Voltage 230VAC ± 10% 50/60 Hz Temperature

Pow er Consumption 3VA max Storage

Display 3 digits red LED Operating

Range -45.5 to +110 Humidity

-45.5 to 99.9 with decimal point

Switchable between °C & °F Protection class

4 indicator LEDs

Screw connector size Wire size 0.14 … 1.5mm2 Inputs

Communication None NTC Temperature -50…50°C 2

W eight ~ 150g Output relays 3

Mounting Panel mount (71 x 29mm cutout) Inductive (AC15) 250V 2A

Resistive (AC1) 250V 8A

-20 … +65°C

0 … +60°C

0 … 80% R.H. Non Condensing

IP65 (front protection with gasket)

3 EC1 Series Electronic Display Case / Coldroom Controller Technical Data EC1 Series Electronic Display Case / Coldroom Controller Technical Data 4

Product Series

8(2) A 250 V ~

EC1-2331 2 3 4 5 6 7 8 9

Imax Pin 1: 15A

L

N

Com

pressor

Defrost

Fan

Power 230 V~

50/60 Hz 3 VA

S1 S5

Copy Key

S1 : Air temperatureS5 : Defrost temperature

Electrical Connection The EC1 series have built-in transformers for ease of installation (refer to selection chart). The controllers are double insulated and are supplied with a safety electrical cover. Caution should be made when removing this cover against electrical shock

The EC1 series uses non-removable screw connectors and will accept cables from 0.14 to 1.5mm²

AccessoriesThe EC1 Series are designed to operate using Emerson standard NTC temperature sensors. These are available in a variety of lengths (refer to table below).

The EC1 Programming Key can be used to upload a set of control parameters from one controller and then be easily downloaded to other controllers with a similar function. The process only takes a few seconds.

The EC1-Series forms a new generation of electronic controllers from Emerson for refrigeration applications. The controllers combine in the small industry standard housing the functionality to control the temperature, fan and defrost in a display case or coldroom.

Available versions are:EC1-233: Three relay version- Thermostat function for thermal expansion valve

(TXV) applications- Fan control function- Defrost control function

Features - Integral mains transformer: 230V- Air temperature control using standard Emerson

NTC sensors- Defrost control with dedicated termination

sensor - Fan management- Electrical connection screw terminals with cable

protection- 3 digit LED display with decimal point- Optional programming key for quick transfer of

control parameters into multiple controllers- Indicator LEDs for compressor, fan & defrost

operation- Display selectable °C / °F- Standard 71 x 29 mm cut-out dimensions- IP 65 protection class when mounted in front

panel- CE approval

Typical ordering package- EC1-233 Controller- 2 x Emerson NTC temperature sensors for air and

defrost control- Optional EC1-PK1 programming key

EC1 SeriesNominal voltage: 2 = 230VNumber of relays: 3 = 3 x Standard RelaysCommunication type: 3 = None

EC1- 2 3 3

Temperature ControlThe Emerson NTC air sensor (S1) is used for temperature control of the display case. The deadband control function is described in the diagram below.

The horizontal axis represents the temperature. If the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd), the compressor relay is activated. The vertical axis represents cooling operation (1=cooling, 0=no cooling) with the control set by an air temperature sensor typically mounted in the air return.

A control parameter allows switching off the evaporator fan during “no cooling”. i.e. S1 reaches the temp. setpoint (St).

The minimum compressor stop delay timer (C2) must elapse before the compressor can restart.

Selection Table

Introduction The EC1 series controllers are for use in commercial refrigeration systems, primarily to control the refrigeration circuit of display cases or coldrooms. The compressor relay output is designed to control the direct switching for integral display cases or allow for a pumpdown cycle in conjunction with a solenoid valve up-stream of the TXV. Primary function of the controller is to maintain the control temperature (air sensor) at a pre-determined setpoint together with fan and defrost management.

The EC1 series are used in more traditional refrigeration systems where TXVs are used to control superheat and would typically be used in stand alone applications.

ApplicationThe functions of the EC1 series display case / coldroom controllers are described in the functional diagrams below:

The air-in temperature sensor (7) controls the thermostat function with a deadband control loop. The defrost function is activated internally by fixed timing intervals for either electrical heater (3) or off-cycle (natural defrost) applications and is terminated using the dedicated temperature sensor (9) or the internal timer. The compressor relay (2) is controlled by the thermostat function and the fan (4) can be linked to the on/off control of the thermostat or remain permanently on. In case of power loss the controller will switch off automatically, creating an intrinsically safe system. A liquid line solenoid valve can be installed upstream of the TXV for pumpdown applications.

The EC1 series model is a traditional case controller with a thermostat for temperature control used in conjunction with conventional TXV (solenoid valve optional).

d4

1

0

Fd

1

0

d5

dl

or dtdPd7

1

0

//

Optional on/of f dur ing def ros t

/ /Optional on/of f dur ing c ooling

C2

//

/ /

d0 F1

Tem p. > S t + rd

Tem p. > S t + rd

Compressor Relay

FanRelay

DefrostRelay

If Sensor S5 < FstIf Sensor S5 > Fst and (S1-S5) > Ft : fans run

Parameters r1 & r2 are used to set min./max. setpoint.Alarms AL (Low Temp. Alarm Limit) and AH (High Temp. Alarm Limit) are active after delay time A1 has elapsed.The alarms are inhibited at start-up by delay timer A2.

Sensors Emerson NTC sensors are available with different cable lengths to meet specific customer's requirements for optimal positioning of the sensors. The Standard Sensor length is 1.5m. All sensors are hermetically sealed in a plastic housing for high reliability and long life. Sensors can be extended provided the connection between the sensor and the extension cable is hermetically sealed.

Compressor ControlThe compressor relay is activated when the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd). However, the minimum stop delay time must elapse before the compressor can start. After a defrost, both the Draindown Time (d7) and the Fan Start Delay (Fd) must elapse before the compressor relay can be reactivated.

Fan ControlDepending upon the application, during normal operation the fans can be designed to operate continuously or switch on/off with the cooling demand. i.e. when the control temperature reaches the setpoint (St), the fans switch off with the compressor relay.

In addition, the fans can remain on or off during the defrost cycle depending upon the requirements of the system.

1 EC1 Series Electronic Display Case / Coldroom Controller Technical Data

Display and KeypadDisplay indicates temperatures with 3 digits in the range of -45.5 to +110 and a resolution of 0.1 within a range of -45.5 to 99.9. The display unit can be switched from °C to °F. The °C symbol is lit and clearly displayed when applicable. Otherwise, the temperature is °F. When the units are changed, all temperature parameters in the controller need to be changed in the respective units.

Indicator LEDs show the status of compressor, fan, defrost and programming active. A blinking LED indicates that the EC1 controller is trying to fulfill a task, but is prevented from doing so by another restraint in the system, typically a delay timer. An example of this would be the minimum compressor run time. A fast blinking LED signifies a forced function, continuous cooling or manual defrost.

Operation and CommissioningSetup and commissioning of an EC1 series controller may be performed by using one of the following options:

- Locally through the 4-button keypad.- Downloading a control parameter set from an EC1

programming key. - Refer to accessories list.

For initial commissioning of a new installation the first EC1 can be commissioned via the dedicated menus with meaningful default values. Additional EC1 controllers with similar applications can be easily commissioned by uploading the parameter list from the first controller and then downloading it into subsequent controllers using the programming key.

Safety FunctionsVarious safety functions are available for use particularly when the EC1 is controlling the compressor directly. These safety features are used to prevent compressor damage and include a minimum compressor off time to prevent short cycling.

Safe operating modes allow the system to continue to operate safely even when the signal is lost from a defective or disconnected sensor. The controller can be programmed to run with constant run and stop times using parameters C3 and C4.

Emerson NTC Temperature Sensor EC1-PK1 programming Key

EC1 Series

EC1 Series Electronic Display Case / Coldroom Controller Technical Data 2

Type Part Code Nr.

Display Case / Coldroom Controller

Three relay version: temperature, fan and defrost control for TXV application with electrical or off-cycle defrost

EC1-233 803 488

Description Nominal 230VAC

----------------------------------------

rd

----

----

--

----

----

--

StAHAL

1

0

r1 r2EC1_Blockdiagr.cdr

Defrost ControlEC1 series controllers allow local defrost management through the built-in defrost timer. Two basic defrost modes are available:

Natural DefrostFor medium temperature applications without defrost heaters. In this mode the evaporator fans typically remain on during the defrost period.

Electrical Defrost All timing parameters can be selected to cover specific defrost modes. See the diagrams below for the function of compressor, defrost and fan output at defrost:

Defrost can be activated after power up (d4 flag) and the delay (d5). The defrost will end either when the defrost termination temperature (dt) has been exceeded or after the maximum defrost duration (dP). The draindown delay (d7) and the fan delay (Fd) must elapse before the system can restart. The next defrost will occur after the specified defrost interval (dI).

End of defrost is detected by the dedicated defrost temperature sensor (S5).

Fans can be switched off during a defrost (F1 flag).

DescriptionCable

LengthType PCN

NTC Sensors (Air type) 1.5m ECN-S15 804 304

(10kΩ a t 25°C ) 3.0m ECN-S30 804 305

6.0m ECN-S60 804 284

EC1 Programming Key EC1-PK1 804 390

Wiring Diagrams

Dimensions (MM)

Technical Data

Supply Voltage 230VAC ± 10% 50/60 Hz Temperature

Pow er Consumption 3VA max Storage

Display 3 digits red LED Operating

Range -45.5 to +110 Humidity

-45.5 to 99.9 with decimal point

Switchable between °C & °F Protection class

4 indicator LEDs

Screw connector size Wire size 0.14 … 1.5mm2 Inputs

Communication None NTC Temperature -50…50°C 2

W eight ~ 150g Output relays 3

Mounting Panel mount (71 x 29mm cutout) Inductive (AC15) 250V 2A

Resistive (AC1) 250V 8A

-20 … +65°C

0 … +60°C

0 … 80% R.H. Non Condensing

IP65 (front protection with gasket)

3 EC1 Series Electronic Display Case / Coldroom Controller Technical Data EC1 Series Electronic Display Case / Coldroom Controller Technical Data 4

Product Series

8(2) A 250 V ~

EC1-2331 2 3 4 5 6 7 8 9

Imax Pin 1: 15A

L

N

Com

pressor

Defrost

Fan

Power 230 V~

50/60 Hz 3 VA

S1 S5

Copy Key

S1 : Air temperatureS5 : Defrost temperature

Electrical Connection The EC1 series have built-in transformers for ease of installation (refer to selection chart). The controllers are double insulated and are supplied with a safety electrical cover. Caution should be made when removing this cover against electrical shock

The EC1 series uses non-removable screw connectors and will accept cables from 0.14 to 1.5mm²

AccessoriesThe EC1 Series are designed to operate using Emerson standard NTC temperature sensors. These are available in a variety of lengths (refer to table below).

The EC1 Programming Key can be used to upload a set of control parameters from one controller and then be easily downloaded to other controllers with a similar function. The process only takes a few seconds.

The EC1-Series forms a new generation of electronic controllers from Emerson for refrigeration applications. The controllers combine in the small industry standard housing the functionality to control the temperature, fan and defrost in a display case or coldroom.

Available versions are:EC1-233: Three relay version- Thermostat function for thermal expansion valve

(TXV) applications- Fan control function- Defrost control function

Features - Integral mains transformer: 230V- Air temperature control using standard Emerson

NTC sensors- Defrost control with dedicated termination

sensor - Fan management- Electrical connection screw terminals with cable

protection- 3 digit LED display with decimal point- Optional programming key for quick transfer of

control parameters into multiple controllers- Indicator LEDs for compressor, fan & defrost

operation- Display selectable °C / °F- Standard 71 x 29 mm cut-out dimensions- IP 65 protection class when mounted in front

panel- CE approval

Typical ordering package- EC1-233 Controller- 2 x Emerson NTC temperature sensors for air and

defrost control- Optional EC1-PK1 programming key

EC1 SeriesNominal voltage: 2 = 230VNumber of relays: 3 = 3 x Standard RelaysCommunication type: 3 = None

EC1- 2 3 3

Temperature ControlThe Emerson NTC air sensor (S1) is used for temperature control of the display case. The deadband control function is described in the diagram below.

The horizontal axis represents the temperature. If the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd), the compressor relay is activated. The vertical axis represents cooling operation (1=cooling, 0=no cooling) with the control set by an air temperature sensor typically mounted in the air return.

A control parameter allows switching off the evaporator fan during “no cooling”. i.e. S1 reaches the temp. setpoint (St).

The minimum compressor stop delay timer (C2) must elapse before the compressor can restart.

Selection Table

Introduction The EC1 series controllers are for use in commercial refrigeration systems, primarily to control the refrigeration circuit of display cases or coldrooms. The compressor relay output is designed to control the direct switching for integral display cases or allow for a pumpdown cycle in conjunction with a solenoid valve up-stream of the TXV. Primary function of the controller is to maintain the control temperature (air sensor) at a pre-determined setpoint together with fan and defrost management.

The EC1 series are used in more traditional refrigeration systems where TXVs are used to control superheat and would typically be used in stand alone applications.

ApplicationThe functions of the EC1 series display case / coldroom controllers are described in the functional diagrams below:

The air-in temperature sensor (7) controls the thermostat function with a deadband control loop. The defrost function is activated internally by fixed timing intervals for either electrical heater (3) or off-cycle (natural defrost) applications and is terminated using the dedicated temperature sensor (9) or the internal timer. The compressor relay (2) is controlled by the thermostat function and the fan (4) can be linked to the on/off control of the thermostat or remain permanently on. In case of power loss the controller will switch off automatically, creating an intrinsically safe system. A liquid line solenoid valve can be installed upstream of the TXV for pumpdown applications.

The EC1 series model is a traditional case controller with a thermostat for temperature control used in conjunction with conventional TXV (solenoid valve optional).

d4

1

0

Fd

1

0

d5

dl

or dtdPd7

1

0

//

Optional on/of f dur ing def ros t

/ /Optional on/of f dur ing c ooling

C2

//

/ /

d0 F1

Tem p. > S t + rd

Tem p. > S t + rd

Compressor Relay

FanRelay

DefrostRelay

If Sensor S5 < FstIf Sensor S5 > Fst and (S1-S5) > Ft : fans run

Parameters r1 & r2 are used to set min./max. setpoint.Alarms AL (Low Temp. Alarm Limit) and AH (High Temp. Alarm Limit) are active after delay time A1 has elapsed.The alarms are inhibited at start-up by delay timer A2.

Sensors Emerson NTC sensors are available with different cable lengths to meet specific customer's requirements for optimal positioning of the sensors. The Standard Sensor length is 1.5m. All sensors are hermetically sealed in a plastic housing for high reliability and long life. Sensors can be extended provided the connection between the sensor and the extension cable is hermetically sealed.

Compressor ControlThe compressor relay is activated when the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd). However, the minimum stop delay time must elapse before the compressor can start. After a defrost, both the Draindown Time (d7) and the Fan Start Delay (Fd) must elapse before the compressor relay can be reactivated.

Fan ControlDepending upon the application, during normal operation the fans can be designed to operate continuously or switch on/off with the cooling demand. i.e. when the control temperature reaches the setpoint (St), the fans switch off with the compressor relay.

In addition, the fans can remain on or off during the defrost cycle depending upon the requirements of the system.

1 EC1 Series Electronic Display Case / Coldroom Controller Technical Data

Display and KeypadDisplay indicates temperatures with 3 digits in the range of -45.5 to +110 and a resolution of 0.1 within a range of -45.5 to 99.9. The display unit can be switched from °C to °F. The °C symbol is lit and clearly displayed when applicable. Otherwise, the temperature is °F. When the units are changed, all temperature parameters in the controller need to be changed in the respective units.

Indicator LEDs show the status of compressor, fan, defrost and programming active. A blinking LED indicates that the EC1 controller is trying to fulfill a task, but is prevented from doing so by another restraint in the system, typically a delay timer. An example of this would be the minimum compressor run time. A fast blinking LED signifies a forced function, continuous cooling or manual defrost.

Operation and CommissioningSetup and commissioning of an EC1 series controller may be performed by using one of the following options:

- Locally through the 4-button keypad.- Downloading a control parameter set from an EC1

programming key. - Refer to accessories list.

For initial commissioning of a new installation the first EC1 can be commissioned via the dedicated menus with meaningful default values. Additional EC1 controllers with similar applications can be easily commissioned by uploading the parameter list from the first controller and then downloading it into subsequent controllers using the programming key.

Safety FunctionsVarious safety functions are available for use particularly when the EC1 is controlling the compressor directly. These safety features are used to prevent compressor damage and include a minimum compressor off time to prevent short cycling.

Safe operating modes allow the system to continue to operate safely even when the signal is lost from a defective or disconnected sensor. The controller can be programmed to run with constant run and stop times using parameters C3 and C4.

Emerson NTC Temperature Sensor EC1-PK1 programming Key

EC1 Series

EC1 Series Electronic Display Case / Coldroom Controller Technical Data 2

Type Part Code Nr.

Display Case / Coldroom Controller

Three relay version: temperature, fan and defrost control for TXV application with electrical or off-cycle defrost

EC1-233 803 488

Description Nominal 230VAC

----------------------------------------

rd

----

----

--

----

----

--

StAHAL

1

0

r1 r2EC1_Blockdiagr.cdr

Defrost ControlEC1 series controllers allow local defrost management through the built-in defrost timer. Two basic defrost modes are available:

Natural DefrostFor medium temperature applications without defrost heaters. In this mode the evaporator fans typically remain on during the defrost period.

Electrical Defrost All timing parameters can be selected to cover specific defrost modes. See the diagrams below for the function of compressor, defrost and fan output at defrost:

Defrost can be activated after power up (d4 flag) and the delay (d5). The defrost will end either when the defrost termination temperature (dt) has been exceeded or after the maximum defrost duration (dP). The draindown delay (d7) and the fan delay (Fd) must elapse before the system can restart. The next defrost will occur after the specified defrost interval (dI).

End of defrost is detected by the dedicated defrost temperature sensor (S5).

Fans can be switched off during a defrost (F1 flag).

DescriptionCable

LengthType PCN

NTC Sensors (Air type) 1.5m ECN-S15 804 304

(10kΩ a t 25°C ) 3.0m ECN-S30 804 305

6.0m ECN-S60 804 284

EC1 Programming Key EC1-PK1 804 390

Wiring Diagrams

Dimensions (MM)

Technical Data

Supply Voltage 230VAC ± 10% 50/60 Hz Temperature

Pow er Consumption 3VA max Storage

Display 3 digits red LED Operating

Range -45.5 to +110 Humidity

-45.5 to 99.9 with decimal point

Switchable between °C & °F Protection class

4 indicator LEDs

Screw connector size Wire size 0.14 … 1.5mm2 Inputs

Communication None NTC Temperature -50…50°C 2

W eight ~ 150g Output relays 3

Mounting Panel mount (71 x 29mm cutout) Inductive (AC15) 250V 2A

Resistive (AC1) 250V 8A

-20 … +65°C

0 … +60°C

0 … 80% R.H. Non Condensing

IP65 (front protection with gasket)

3 EC1 Series Electronic Display Case / Coldroom Controller Technical Data EC1 Series Electronic Display Case / Coldroom Controller Technical Data 4

Product Series

8(2) A 250 V ~

EC1-2331 2 3 4 5 6 7 8 9

Imax Pin 1: 15A

L

N

Com

pressor

Defrost

Fan

Power 230 V~

50/60 Hz 3 VA

S1 S5

Copy Key

S1 : Air temperatureS5 : Defrost temperature

Electrical Connection The EC1 series have built-in transformers for ease of installation (refer to selection chart). The controllers are double insulated and are supplied with a safety electrical cover. Caution should be made when removing this cover against electrical shock

The EC1 series uses non-removable screw connectors and will accept cables from 0.14 to 1.5mm²

AccessoriesThe EC1 Series are designed to operate using Emerson standard NTC temperature sensors. These are available in a variety of lengths (refer to table below).

The EC1 Programming Key can be used to upload a set of control parameters from one controller and then be easily downloaded to other controllers with a similar function. The process only takes a few seconds.

The EC1-Series forms a new generation of electronic controllers from Emerson for refrigeration applications. The controllers combine in the small industry standard housing the functionality to control the temperature, fan and defrost in a display case or coldroom.

Available versions are:EC1-233: Three relay version- Thermostat function for thermal expansion valve

(TXV) applications- Fan control function- Defrost control function

Features - Integral mains transformer: 230V- Air temperature control using standard Emerson

NTC sensors- Defrost control with dedicated termination

sensor - Fan management- Electrical connection screw terminals with cable

protection- 3 digit LED display with decimal point- Optional programming key for quick transfer of

control parameters into multiple controllers- Indicator LEDs for compressor, fan & defrost

operation- Display selectable °C / °F- Standard 71 x 29 mm cut-out dimensions- IP 65 protection class when mounted in front

panel- CE approval

Typical ordering package- EC1-233 Controller- 2 x Emerson NTC temperature sensors for air and

defrost control- Optional EC1-PK1 programming key

EC1 SeriesNominal voltage: 2 = 230VNumber of relays: 3 = 3 x Standard RelaysCommunication type: 3 = None

EC1- 2 3 3

Temperature ControlThe Emerson NTC air sensor (S1) is used for temperature control of the display case. The deadband control function is described in the diagram below.

The horizontal axis represents the temperature. If the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd), the compressor relay is activated. The vertical axis represents cooling operation (1=cooling, 0=no cooling) with the control set by an air temperature sensor typically mounted in the air return.

A control parameter allows switching off the evaporator fan during “no cooling”. i.e. S1 reaches the temp. setpoint (St).

The minimum compressor stop delay timer (C2) must elapse before the compressor can restart.

Selection Table

Introduction The EC1 series controllers are for use in commercial refrigeration systems, primarily to control the refrigeration circuit of display cases or coldrooms. The compressor relay output is designed to control the direct switching for integral display cases or allow for a pumpdown cycle in conjunction with a solenoid valve up-stream of the TXV. Primary function of the controller is to maintain the control temperature (air sensor) at a pre-determined setpoint together with fan and defrost management.

The EC1 series are used in more traditional refrigeration systems where TXVs are used to control superheat and would typically be used in stand alone applications.

ApplicationThe functions of the EC1 series display case / coldroom controllers are described in the functional diagrams below:

The air-in temperature sensor (7) controls the thermostat function with a deadband control loop. The defrost function is activated internally by fixed timing intervals for either electrical heater (3) or off-cycle (natural defrost) applications and is terminated using the dedicated temperature sensor (9) or the internal timer. The compressor relay (2) is controlled by the thermostat function and the fan (4) can be linked to the on/off control of the thermostat or remain permanently on. In case of power loss the controller will switch off automatically, creating an intrinsically safe system. A liquid line solenoid valve can be installed upstream of the TXV for pumpdown applications.

The EC1 series model is a traditional case controller with a thermostat for temperature control used in conjunction with conventional TXV (solenoid valve optional).

d4

1

0

Fd

1

0

d5

dl

or dtdPd7

1

0

//

Optional on/of f dur ing def ros t

/ /Optional on/of f dur ing c ooling

C2

//

/ /

d0 F1

Tem p. > S t + rd

Tem p. > S t + rd

Compressor Relay

FanRelay

DefrostRelay

If Sensor S5 < FstIf Sensor S5 > Fst and (S1-S5) > Ft : fans run

Parameters r1 & r2 are used to set min./max. setpoint.Alarms AL (Low Temp. Alarm Limit) and AH (High Temp. Alarm Limit) are active after delay time A1 has elapsed.The alarms are inhibited at start-up by delay timer A2.

Sensors Emerson NTC sensors are available with different cable lengths to meet specific customer's requirements for optimal positioning of the sensors. The Standard Sensor length is 1.5m. All sensors are hermetically sealed in a plastic housing for high reliability and long life. Sensors can be extended provided the connection between the sensor and the extension cable is hermetically sealed.

Compressor ControlThe compressor relay is activated when the measured temperature exceeds the sum of Temperature Control Setpoint (St) and Control Deadband Differential (rd). However, the minimum stop delay time must elapse before the compressor can start. After a defrost, both the Draindown Time (d7) and the Fan Start Delay (Fd) must elapse before the compressor relay can be reactivated.

Fan ControlDepending upon the application, during normal operation the fans can be designed to operate continuously or switch on/off with the cooling demand. i.e. when the control temperature reaches the setpoint (St), the fans switch off with the compressor relay.

In addition, the fans can remain on or off during the defrost cycle depending upon the requirements of the system.

1 EC1 Series Electronic Display Case / Coldroom Controller Technical Data

Display and KeypadDisplay indicates temperatures with 3 digits in the range of -45.5 to +110 and a resolution of 0.1 within a range of -45.5 to 99.9. The display unit can be switched from °C to °F. The °C symbol is lit and clearly displayed when applicable. Otherwise, the temperature is °F. When the units are changed, all temperature parameters in the controller need to be changed in the respective units.

Indicator LEDs show the status of compressor, fan, defrost and programming active. A blinking LED indicates that the EC1 controller is trying to fulfill a task, but is prevented from doing so by another restraint in the system, typically a delay timer. An example of this would be the minimum compressor run time. A fast blinking LED signifies a forced function, continuous cooling or manual defrost.

Operation and CommissioningSetup and commissioning of an EC1 series controller may be performed by using one of the following options:

- Locally through the 4-button keypad.- Downloading a control parameter set from an EC1

programming key. - Refer to accessories list.

For initial commissioning of a new installation the first EC1 can be commissioned via the dedicated menus with meaningful default values. Additional EC1 controllers with similar applications can be easily commissioned by uploading the parameter list from the first controller and then downloading it into subsequent controllers using the programming key.

Safety FunctionsVarious safety functions are available for use particularly when the EC1 is controlling the compressor directly. These safety features are used to prevent compressor damage and include a minimum compressor off time to prevent short cycling.

Safe operating modes allow the system to continue to operate safely even when the signal is lost from a defective or disconnected sensor. The controller can be programmed to run with constant run and stop times using parameters C3 and C4.

Emerson NTC Temperature Sensor EC1-PK1 programming Key

EC1 Series

EC1 Series Electronic Display Case / Coldroom Controller Technical Data 2

Type Part Code Nr.

Display Case / Coldroom Controller

Three relay version: temperature, fan and defrost control for TXV application with electrical or off-cycle defrost

EC1-233 803 488

Description Nominal 230VAC

----------------------------------------

rd

----

----

--

----

----

--

StAHAL

1

0

r1 r2EC1_Blockdiagr.cdr

Defrost ControlEC1 series controllers allow local defrost management through the built-in defrost timer. Two basic defrost modes are available:

Natural DefrostFor medium temperature applications without defrost heaters. In this mode the evaporator fans typically remain on during the defrost period.

Electrical Defrost All timing parameters can be selected to cover specific defrost modes. See the diagrams below for the function of compressor, defrost and fan output at defrost:

Defrost can be activated after power up (d4 flag) and the delay (d5). The defrost will end either when the defrost termination temperature (dt) has been exceeded or after the maximum defrost duration (dP). The draindown delay (d7) and the fan delay (Fd) must elapse before the system can restart. The next defrost will occur after the specified defrost interval (dI).

End of defrost is detected by the dedicated defrost temperature sensor (S5).

Fans can be switched off during a defrost (F1 flag).

DescriptionCable

LengthType PCN

NTC Sensors (Air type) 1.5m ECN-S15 804 304

(10kΩ a t 25°C ) 3.0m ECN-S30 804 305

6.0m ECN-S60 804 284

EC1 Programming Key EC1-PK1 804 390

Wiring Diagrams

Dimensions (MM)

Technical Data

Supply Voltage 230VAC ± 10% 50/60 Hz Temperature

Pow er Consumption 3VA max Storage

Display 3 digits red LED Operating

Range -45.5 to +110 Humidity

-45.5 to 99.9 with decimal point

Switchable between °C & °F Protection class

4 indicator LEDs

Screw connector size Wire size 0.14 … 1.5mm2 Inputs

Communication None NTC Temperature -50…50°C 2

W eight ~ 150g Output relays 3

Mounting Panel mount (71 x 29mm cutout) Inductive (AC15) 250V 2A

Resistive (AC1) 250V 8A

-20 … +65°C

0 … +60°C

0 … 80% R.H. Non Condensing

IP65 (front protection with gasket)

3 EC1 Series Electronic Display Case / Coldroom Controller Technical Data EC1 Series Electronic Display Case / Coldroom Controller Technical Data 4

Product Series

8(2) A 250 V ~

EC1-2331 2 3 4 5 6 7 8 9

Imax Pin 1: 15A

L

N

Com

pressor

Defrost

Fan

Power 230 V~

50/60 Hz 3 VA

S1 S5

Copy Key

S1 : Air temperatureS5 : Defrost temperature

ConfidenceInstall

Emerson Climate Technologies leads the industry with its state-of-the-art electronic solutions for commercial refrigeration market. Adding to its innovative line of electronic controllers, we are pleased to introduce our new EC1 series electronic display case and coldroom controllers. Easy to install and commission, EC1 series controllers help you run your refrigeration equipment more efficiently. The controllers work seamlessly with other relevant Emerson line components to give you the best refrigeration control solution in the market. With EC1 series, you’re truly in control of your business.

Choose Emerson. Install Confidence.

EMERSON is not to be held responsible for erroneous literature regarding capacities, dimensions, applications, etc. stated herein. Products, specifications and data in this literature are subject to change without notice. The information given herein is based on technical data and tests which EMERSON believes to be reliable and which are in compliance with technical knowledge of today. It is intended only for use by persons having the appropriate technical knowledge and skills, at their own discretion and risk. Since conditions of use are outside of EMERSON’s control we can not assume any liability for results obtained or damages occurred due to improper application.

This document replaces all earlier versions.

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EC1 SeriesElectronic Controller for Display Case / Coldroom