Emerson Display Case And Cold Room Controller Ec2 391 Users Manual 391_65136_EN_R01

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EC2-391_65136_EN_R01.doc Replacement for 00 1 / 4 PCN: 865 022 21.09.2007

EC2-391 Display Case and Coldroom Controller

Operating Instructions GB

Note: This document contains short form instructions for experienced users.

Use last column in List of Parameters to document your individual settings.

More detailed information can be found in the User Manual.

The EC2-391 is a dedicated refrigeration controller with superheat and a driver for

an Alco Controls Electric Control Valve EX2. In addition the EC2-391 controls air

temperature and manages defrost and fan(s).

Two ECN-Pxx pipe temperature sensors (1) and (2) measure suction gas

temperatures at the evaporator inlet / outlet and feed the signals into the superheat

control loop. The superheat controller output modulates the opening of the EX2

pulse width modulated Electrical Control Valve (6) thus optimising the refrigerant

mass flow through the evaporator. The air temperature sensors (3) and (4) measure

air-in and out temperature of the evaporator and feed signals into the air

temperature thermostat. The ECN-Fxx fin sensor (5) is used for defrost

termination. The controller has 3 relay outputs to control the defrost heater (9), the

evaporator fan (8) and an optional output (7). Please consult the technical data

(right) for input and output ratings.

In case of power loss, due to the positive shut-off characteristics of the EX2

Electrical Control Valves, a liquid line solenoid valve is not needed to prevent

flooding of the compressor.

! Safety instructions:

• Read installation instructions thoroughly. Failure to comply can result in

device failure, system damage or personal injury.

• The product is intended for use by persons having the appropriate

knowledge and skills.

• Ensure electrical ratings per technical data are not exceeded.

• Disconnect all voltages from system before installation.

• Keep temperatures within nominal limits.

• Comply with local electrical regulations when wiring

Technical Data

EC2 Series Controller

Power supply 24VAC ±10%; 50/60Hz; Class II

Power consumption 20VA max including EX2

Communication LonWorks® Interface, FTT10, RJ45 connector

Plug-in connector size Removable screw terminals

wire size 0.14 … 1.5mm2

Temperature

storage

operating

-20 … +65°C

0 … +60°C

Humidity 0…80% r.h. non condensing

Protection class IP65 (front protection with gasket)

Pressure transmitter input 24VDC, 4...20mA

Output relays (3) SPDT contacts, AgCdO

Inductive (AC15) 250V/2A

Resistive (AC1) 250V/8A; 12A total return current

Triac output for EX2

Electrical Control Valve

Coil (ASC 24V only)

24V AC, 0.1 … 1A

Marking

Mounting

The EC2-391 can be mounted in panels with a 71 x

29 mm cutout. See dimensional drawing below for

space requirements including rear connectors.

Push controller into panel cutout.(1)

Make sure that mounting lugs are flush with outside

of controller housing

Insert allen key into front panel holes and turn

clockwise. Mounting lugs will turn and gradually

move towards panel (2)

Turn allen key until mounting lug barely touches

panel. Then move other mounting lug to the same

position (3)

Tighten both sides very carefully until controller is

secured. Do not over tighten as mounting lugs will

break easily.

Electrical Installation

Refer to the electrical wiring diagram (below) for electrical connections. A copy of

this diagram is labeled on the controller. Use connection wires/cables suitable for

90°C operation (EN 60730-1).

EC2 analog inputs are for dedicated sensors only and should not be connected to

any other devices. Important: Keep controller and sensor wiring well separated

from mains wiring. Minimum recommended distance 30mm.

Warning: Use a class II category transformer for 24VAC power supply

(EN 60742). Do not ground the 24VAC lines. We recommend to use one

transformer per EC2 controller and to use separate transformers for 3rd party

controllers, to avoid possible interference or grounding problems in the power

supply. Connecting any EC2 inputs to mains voltage will permanently damage the

EC2.

EC2-391_65136_EN_R01.doc Replacement for 00 2 / 4 PCN: 865 022 21.09.2007

EC2-391 Display Case and Coldroom Controller

Operating Instructions GB

Recommended Sensor Positions in Detail:

(1) ECN-Pxx coil-in temperature sensor: Position on the first return bend of the

evaporator.

(2) ECN-Pxx coil-out temperature sensor: Position directly after the evaporator on

the common suction line.

(3) ECN-Pxx air-in temperature sensor: Position in the middle of the cabinet as

high as possible.

(4) ECN-Pxx air-out temperature sensor: Position asymmetric closer to the

expansion valve as high as possible.

(5) ECN-Fxx fin temperature sensor: Position on the evaporator, asymmetric closer

to the expansion valve.

Recommendations for mounting the pipe sensor: Insure proper thermal contact by

using a metallic pipe clamp or temperature resistant plastic straps. Do not use

standard plastic tie wraps (as used for electrical wiring) as they may become loose

over time, which could result in faulty temperature measurements and poor

superheat control performance. It is recommended to insulate the pipe temperature

sensor with ARMAFLEX™ or equivalent. The recommended position of the pipe

sensors is between 9 and 3 o’clock as shown in the picture.

Both air temperature sensors should be mounted on spacers in the air duct so that

there is airflow around.

Caution: The sensor cables can be extended if necessary. The connection must be

protected against water and dust.

The evaporator outlet temperature sensor should be mounted on the common

suction header of the evaporator.

A calibration correction can be made using the parameter u1 (see procedure

below).

Setup and Parameter Modification Using the Keypad

For convenience, an infrared receiver for the optional IR remote control unit is

build-in, enabling quick and easy modification of the system parameters when a

computer interface is not available.

Alternatively, the parameters can be accessed via the 4-button keypad. The

configuration parameters are protected by a numerical password. The default

password is “12”. To select the parameter configuration:

• Press the PRG button for more than 5 seconds, a flashing “0” is displayed

• Press or until “12” is displayed (password)

• Press SEL to confirm password

The first modifiable parameter code is displayed (/1).

To modify parameters see Parameters modification below.

Parameter Modification: Procedure

• Press or to show the code of the parameter that has to be changed;

• Press SEL to display the selected parameter value;

• Press or to increase or decrease the value;

• Press SEL to temporarily confirm the new value and display its code;

• Repeat the procedure from the beginning "press or to show..."

To exit and save the new settings:

• Press PRG to confirm the new values and exit the parameters modification

procedure.

To exit without modifying any parameter:

• Do not press any button for at least 60 seconds (TIME OUT).

• Press “ESC” on IR remote control.

Defrost Activation:

A defrost cycle can be activated locally from the keypad:

• Press the button for more than 5 seconds, a flashing “0” is displayed

• Press or until “12” is displayed (password)

• Press SEL to confirm password

The defrost cycle is activated.

Special Functions:

The Special Functions can be activated by:

• Press and together for more than 5 seconds, a flashing “0” is displayed.

• Press or until the password is displayed (default = 12). If password was

changed, select the new password.

• Press SEL to confirm password, a “0” is displayed and the Special Function

mode is activated.

• Press or to select the function. The number of special functions is dynamic

and controller dependent. See list below.

• Press SEL to activate the function without leaving the special function mode.

• Press PRG to activate the function and leave the special function mode.

Most of the Special Functions work in a toggle mode, the first call activates the

function, and the second call deactivates the function.

The indication of the function can only be displayed after exiting the special

function mode.

• 0: Display test function

• 1: Clear alarm messages

• 2: Cleaning mode. The cleaning mode is effectively a manual defrost with the

option of the fans on/off. The cleaning mode should not be used in order to

isolate the application for maintenance purposes.

• 3: Fans only

• 4: Set the electronic control valve to 100% open

• 5: Resets all parameters to the factory default setting. The controller will

indicate “oF” during the reset and the valve will close.

Display of Data:

The data to be shown on the display can be selected by the user. In case of an

alarm, the alarm code is displayed alternately with the selected data. The user can

inhibit the alarm code. Press the SEL button to scroll through all possible

displayable data.

The display will show for one second the numerical identifier of the data and then

the selected data. After two minutes the display will return to the by parameter /1

selected data.

It is possible to temporarily display the values of the different sensors. This is a

useful feature when initially setting-up the system without the aid of the

WebPages. Press the SEL sequentially. The value displayed on the screen

corresponds to the number corresponding to the /1 parameter. Action only valid

when parameter H2 = 3.

Logical status of lighting relay

LON service LED

Logical status of fan relay

Logical status of defrost heater relay

Alarm condition

IR LED

EC2-391_65136_EN_R01.doc Replacement for 00 3 / 4 PCN: 865 022 21.09.2007

EC2-391 Display Case and Coldroom Controller

Operating Instructions GB

List of Parameters

/ DISPLAY PARAMETERS Min Max Unit Def. Custom

/1 Value to show 0 9 - 0

0 = Thermostat control temperature with Temp. alignment °C

1 = Air-in temperature °C

2 = Air-out temperature °C

3 = Alarm temperature °C

4 = Defrost termination temperature °C

5 = Coil-in temperature °C

6 = Coil-out temperature °C

7 = Calculated superheat °K

8 = Valve opening in %

9 = Displays defrost status

/2 Alarm suppression 0 = off, 1 = on 0 1 - 0

/5 Temperature Unit 0 = °C, 1 = °F 0 1 - 0

/6 Decimal point 0 = yes, 1 = no 0 1 - 0

/7 Display during defrost 0 2 - 0

0 = dF (= defrost mode); 1 = dF + defrost termination temp.

2 = dF + control temperature

/C Temperature alignment for /1=0 -20 20 K / °F 0.0

A ALARM-PARAMETERS

A0 Mean factor alarm temperature 0 100 % 100

A1 Low temp alarm delay 0 180 min 5

A2 High temp alarm delay 0 180 min 5

A3 Alarm delay after defrost 0 180 min 10

AH High temp alarm limit AL 70 °C / K 40

AL Low temp alarm limit -55 AH °C / K -50

At Alarm limit type 0 1 - 0

0=absolute temperatures °C; 1= relative temperatures K to setpoint

r THERMOSTAT-PARAMETERS

r1 Min setpoint -50 r2 °C -50

r2 Setpoint max r1 60 °C 40

r3 Day/night control 0 = off, 1 = on 0 1 - 1

r4 Thermostat mode 0 4 - 1

0 = off, no thermostat function, continues cooling air in sensor monitoring

off, no temp. alarms generated

1 = cooling, deadband control: cut in = set-point + difference

cut out = set-point

2 = cooling, modulating thermostat: cut in = set-point

cut out = set-point – difference /2

3 = heating, deadband control: cut in = set-point – difference

cut out = set-point

4 = on, external control using nvi Valve via SNMP. Air in and air out sensor

monitoring off. Temp. alarms will be generated

r6 Setpoint night r1 r2 °C 4.0

r7 Differential night 0.1 20.0 K 2.0

r8 Mean factor, day operation 0 100 % 100

r9 Mean factor, night operation 0 100 % 50

rd Differential day 0.1 20.0 K 2.0

St Setpoint day r1 r2 °C 2.0

d DEFROST PARAMETERS

d0 Defrost mode 0 2 - 1

0 = natural defrost, defrost heater not activated

pulsed defrost not possible

1 = forced defrost, defrost heater activated, pulsed

defrost possible

2 = forced defrost, defrost heater activated, pulsed defrost possible,

defrost termination using nviStartUp via SNMP

d1 Termination by: 0 3 - 0

0 = termination by temperature,

termination by time will generate an alarm

1 = termination by time,

termination by temperature will generate an alarm

2 = first, what ever comes first time or temperature, no alarm

3 = last, by time and temperature, no alarm

d2 Defrost termination sensor 0 1 - 1

0 = Dedicated defrost sensor must be installed

1 = Air-out sensor used for defrost termination

d3 Pulsed defrost 0 1 - 0

0 = off, no pulsed defrost, heaters switched off at defrost termination

temperature dt or max. time dP whatever is selected

1 = on, pulsed defrost, dd and dH in use, heaters are switched off at

dH and switched on again at dH – dd

d4 Defrost at startup 0 = no, 1 = yes 0 1 - 0

d5 Delay power up defrost 0 180 min 0

Min Max Unit Def. Custom

d6 Pump down delay 0 180 sec 0

Compressor will run during pump down delay while valve is closed

d7 Drain delay 0 15 min 2

d8 Injection delay 0 180 sec 0

Valve is open during injection delay while compressor is not running

d9 Demand defrost mode

0 = off, 1 = on, 2 = on together with

timed defrost

0 2 - 0

dd Pulsed defrost differential 1 20 K 2

dH Pulsed defrost setpoint -40 dt °C 5

dt Defrost termination temperature -40 90 °C 8

dP Max defrost duration 0 180 min 30

dI Defrost interval 0 192 h 8

du Start up delay after synch 0 180 min 30

F FAN-PARAMETERS

F1 Fan startup by: 0 = on 0 4 - 0

1 = delayed by time Fd, error on temperature

2 = by temperature Ft, error on time

3 = first, whatever comes first time or temperature, no alarm

4 = last, time and temperature must come, no alarm

F2 During no cooling 0 3 - 0

0 = on; 1 = off; 2 = delayed by F4; 3 = off, when door open

F3 During defrost 0 = on, 1 = off 0 1 - 0

F4 Stop delay time 0 30 min 0

F5 During cleaning 0 = off, 1 = on 0 1 - 0

Fd Fan delay after defrost 0 30 min 0

Ft On temp after defrost -40 40 °C 0

u SUPERHEAT PARAMETERS

u0 Refrigerant 0 = R22 1 = R134a

2 = R507 3 = R404A 4 = R407C

5 = R410A 6 = R124 7 = R744A

0 7 - 3

u1 Correction glide / dp

Glide = positive values

Pressure drop = negative values

-20.0 20.0 K 0.0

u2 MOP control

0 = MOP off, 1 = MOP on

0 1 - 0

u3 MOP temperature -40 40 °C 0

u4 Superheat mode 0 = off

1 = fixed superheat

2 = adaptive superheat

0 2 - 1

u5 Superheat init setpoint u6 u7 K 6

u6 Superheat setpoint min. 3 u7 K 3

u7 Superheat setpoint max. u6 20 K 15

uu Start opening 25 75 % 30

DIGITAL INPUT PARAMETERS

i0 S5 input 1 = inverse function 0 1 - 0

∩0 Functions for S5 0 = normal input 0 8 - 0

1 = cleaning

2 = only fan

3 = door contact

4 = permanent cooling

5 = day / night switch

6 = compressor safety chain

7 = defrost request

8 = defrost inhibited

DIGITAL OUTPUT PARAMETERS

o0 Output 1 = inverse function 0 1 - 0

n0 Functions for output 1 = alarm 0 1 - 0

H OTHER PARAMETERS

H2 Display access 0 4 - 3

0 = all disabled (Caution: access to controller only via LON

network possible)

1 = Keyboard enabled

2 = IR remote control enabled

3 = Keyboard and IR remote control; Temporary data display and

manual defrost enabled.

4 = Keyboard and IR remote control; Temporary data display

disabled. Control setpoint with SEL key and manual defrost

enabled.

H3 IR access code 0 199 - 0

H5 Password 0 199 - 12

EC2-391_65136_EN_R01.doc Replacement for 00 4 / 4 PCN: 865 022 21.09.2007

EC2-391 Display Case and Coldroom Controller

Operating Instructions GB

Formula for Mean Factors A0, r8, r9

Temperature calculation by the following formula:

Temperature = Airin * (1 - Mean Factor / 100) + Airout * Mean Factor / 100

Examples:

Mean factor = 0 , Temperature = Air in

Mean factor = 100, Temperature = Air out

Mean factor = 50 , Temperature = Average between Air-in and Air-out

Alarm Codes

E0 Coil in sensor alarm

E1 Coil out sensor alarm

E2 Air-in sensor alarm This Alarm Code is inhibited if no air-in sensor used

(A0, r8 and r9 = 100)

E3 Air-out sensor alarm This Alarm Code is inhibited if no air-out sensor used

(A0, r8 and r9 = 0) and fin sensor installed (d2 = 1)

E4 Fin sensor alarm This Alarm Code is inhibited if no fin sensor used (d2 = 0)

Explanations for E0 … E4 Alarms: No sensor connected, or the sensor and/or the

sensor cable is broken or short-circuited.

Er Data error display - out of range

Data send to the display is out of range.

AH High temperature alarm

AL Low temperature alarm

AE Thermostat emergency operation

Air sensor failure, system is in continuous cooling mode

AF Valve Status

Valve closed due to compressor safety loop active

Ao Superheat, emergency operation

Sensor(s) failure

Ar No refrigerant flow detected

No refrigerant flow was detected

Au Valve open 100% for more than 10 minutes

dt Forced defrost termination (time or temperature)

Ft Forced fan startup (time or temperature)

Messages

--- No data to display

The display will show an “---” at node start up and when no data is send to

the display.

In Reset to default values activated

The display will show an “In” when the factory default configuration data set

is initialized.

Id Wink request received

The display will show a flashing “Id” when the wink request was received.

The flashing “Id” will be shown on the display until the service button will

be pressed, or a 30 min delay timer will expire or a second wink request is

received.

OF Node is offline

The node is offline and no application is running. This is the result of a

network management command and will happen for example during node

installation.

dS Defrost standby

dP Pump down

dF Defrost cycle

dd Defrost drain delay

dI Defrost injection delay

du Defrost start-up delay

Cn Cleaning

CL Alarms are cleared

Visualising Data: LON Monitoring Server

The EC2-391 has a LON communication interface enabling the controller to be

directly connected to a Monitoring Server. It can be connected by using the optional

cable assembly to a LON network (ECC-014, Order No. 804 381, with RJ45 to

open, cable length 3m).

Neuron ID / Service PIN:

The service pin is available on the display. It is used to identify the controller in a

LON network. Press the button for app. 1 second to send the Neuron ID. The

LED in the left upper corner will indicate the transmission of the Neuron ID.

The default settings may be modified remotely from the Monitoring Server via the

LON network. Consult the Monitoring Server user manual for more information.

It is also possible to display live graphical data on the server or to log data

containing the control temperature at defined intervals.

Emerson Electric GmbH & Co OHG 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 cannot assume any liability for results

obtained or damages occurred due to improper application.

This document replaces all former versions

Emerson Electric GmbH & Co OHG - Postfach 1251 - Heerstraße 111 - D-71332 Waiblingen - Germany - Phone .49-(0)7151-509-0 - Fax .49-(0)7151-509-200

www.emersonclimate.eu