Emerson EC2-352 User Manual

Operating instruction

!

Power supply

24VAC ±10% ; 50/60Hz; Class I I

Power consumption

20VA max including EX2

Communication

TCP/IP Ethernet 10MBit/s

Plug-in connector size

Removable screw terminals

Temperature

operating

0 … +60°C

Humidity

0…80% r.h. non co ndensing

Protection class

IP65 (front protection with gasket)

Pressure transmitter input

24VDC, 4...20mA

Output relays (3)

SPDT conta cts, AgCdO

Inductive (AC15) 250V/2A

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

Triac output for EX2

Coil (ASC 24V only)

24V AC, 0.1 … 1A

The EC2-352 can be mounted in panels with a 71 x
29 mm cutout. See dimensional drawing below for

Make sure that mounting lugs are flush with outside

allen key into front panel holes and turn

clockwise. Mounting lugs will turn and gradually

Turn allen key until mounting lug barely touches
panel. Then move other mounting lug to the same

y until controller is
secured. Do not over ti ghten as mounting lugs will
break easi ly.

EC2-352 Display Case and Coldroom Controller

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.

Technical Data:
EC2 Series Controller

wire size 0.14 … 1.5 mm2

The EC2-352 is a dedicated refrigeration controller with superheat and a driver for
an Alco Controls El ect ric C ontrol Va lve E X2 . In ad di tion th e EC2-352 controls air
temperature and manages defrost and fan (s ).

A PT5 pressure transmitter (1) and an ECN-Pxx pipe temperature sensor (2)
measure saturated suction gas pressure and suction gas temperature at the
evaporator outlet and feed the signals into the superheat control loop. The
superheat controller output modulates the opening of the EX2 pulse width
modulated Elec trical Control Valve ( 6) thus optimizing the refrigerant mass flow
through the evaporator. The ECN-Sxx 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 compressor (7),
defrost heater (9) and evaporator fan (8). 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 compr essor.

storage

-20 … +65°C

Electrical Control Valve

Marking

Mounting:

space requirements including rear connectors.
Push controller in to panel cutout.(1)

of controller housing
Insert

move towards panel (2)

position (3)
Tighten both sides very carefull

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 su itable for
90°C operation (EN 60730-1)

Safety instruc tions:

• 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.

• D iscon nect all voltages from system bef o re ins ta llation.

• Keep temperatures wit h in n ominal limits.

• Comply with local electrical regulations when wiring

EC2 analog inputs are for dedicated sensors only and should not be connected to
any other devices. C onnecting any EC2 inpu ts to mains voltage will per manently
damage the EC2.
Important: Keep controller an d sensor wiring well separated from mains wiring.
Minimum re commended 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 an d to use separate transformers for 3

rd

party controllers, to
avoid possible interference or grounding problems in the power supply. Connecting
any EC2 inputs to main s voltage will permanently dam age the EC2.

Emerson Climate Technologies GmbH www.emersonclimate.eu

Am Borsigturm 31 I 13507 Berlin I Germany Date: 15.06.2016 EC2-352_OI_EN_R07_864925.doc

Operating instruction

Ethernet activity LED

(only active when service pin is pressed)

IR LED

EC2-352 Display Case and Coldroom Controller

Recommended Senso r Positi ons in Deta il:

(2) ECN-Pxx coil-out temp eratur e sensor: Posi tion di rectly aft er the evap orator on
the common suction line.
(3) ECN-Sxx air-in temperature sensor: Position in the middle of the cabinet as
high as possible.
(4) ECN-Sxx air-out temperature sensor: Position asymmetric closer to the
expansion valve as hi gh as possible.
(5) ECN-Fxx fin temperature sensor: Position on the evaporator, asymmetric closer
to the expansion va lve.
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.

(1) PT5-07M suction pressure transmitter: Position on the common suction line
close to coil-out temperature sensor (2)
Both air tem perature s ensors shou ld be mount ed on spacers i n 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 eva porator.
A calibration correction can be made using the parameter u1 (see procedure
below).

Setup and Paramete r Modifi cation Usi ng the Keypad

For convenience, an infrared receiver for the optional IR remote control unit is
build-in, enab ling quick and eas y modification of th e system parameters wh en 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 mo d ifiable pa r ameter code is displayed (/1).
To modify parameters see Parameters mo dification 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 decr ease 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 cyc le can be activated locally from the keypad:

• Press the

• Press

button for more than 5 sec onds, a flashing “0” is displaye d

or until “12” is displayed (password)

• Press SEL to confirm password
The defrost cycle is activated.

Special Function s:

The Special F unctions can be ac tivated by:

• Press

• Press

and together f or m or e than 5 seconds, a flashing “0” is displayed.

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

changed, s elect the new pa ssword.

• 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 functi on mode.

• Press PRG to activate the fu nction and leave the speci al function m o de.

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 applicatio n for maintenance purposes.

• 3: Fans only

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

• 5: Displays the current TCP/IP address

• 6: Set the controller's TCP/IP address to 192.168.1.101 (default value). This

change is only temporary. A power down will reset the previous address.

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

indicate “oF” during the reset and the va lv e will close.

Display of Data:

The data to be permanently shown on the display can be selected by the user
(parameter /1). In case of an alarm, the alarm code is displayed alternately with the
selected data. The user can inhibit the alarm code.
It is possible to temporarily display these values. This is a useful feature when
initially setting-up the system without the aid of the WebPages. Press the SEL
button to scroll through all possible displayable data.. The display will show for
one second the numerical identifier of the data (see /1 parameter) and then the
selected data. After two minutes the display will return to the by parameter /1
selected data. This action is only valid when parameter H2 = 3.

Logical status of compressor relay

Logical status of fan relay

Logical status of defrost heater relay

Alarm condition

Am Borsigturm 31 I 13507 Berlin I Germany Date: 15.06.2016 EC2-352_OI_EN_R07_864925.doc

Emerson Climate Technologies GmbH www.emersonclimate.eu

/

DISPLAY PARAMETERS

Min

Max

Unit

Def.

Custom

/1

Value to show

0 9 - 0

0 = Thermostat control temperature with Temp. alignment /C

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 dur in g 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 alar m limit

AL

70

°C / K

40

AL

Low temp alarm limit

-55

AH

°C / K

-50

At

Alarm limit ty pe

0 1 - 0

0=absolu te temperatur es °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 cooli ng air in sensor

sensor monitoring off. Temp. alarm s wil l be generated

r6

Setpoint night

r1

r2

°C

4.0 r7

Differential night

0.1

20.0 K 2.0 r8

Mean factor, day operat ion

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

defrost termin a t io n us i ng nv iS t a r tU p v ia SN MP

d1

Termination by:

0 3 - 0

0 = termination by tem perature,

3 = last, by time and temperature, no alarm

d2

Defrost terminati on sensor

0 1 - 1

0 = Dedicated defrost sensor must be installed
1 = Air-out sensor used for defrost termination

Min

Max

Unit

Def.

Custom

d3

Pulsed defrost

0 1 - 0

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

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

d6

Pump down de l a y

0

180

sec 0

Compressor will run during pump down delay while valve is closed

d7

Drain delay

0

15

min

2 d8

Injection del ay

0

180

sec 0 Valve is open during injection delay while compressor is not running

d9

Demand defr ost mode

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

4 = last, time and tempera t ure must come, no alarm

F2

During no cooling

0 2 - 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 cle aning 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

C

COMPRESSOR PARAMETERS

C0

Delay first start after power up

0

15

min

0 C1

Cycle time

0

15

min

0 C2

Min. stop time

0

15

min

0 C3

Min. run time

0

15

min

0 u

SUPERHEAT PARAMETERS

u0 Refrigerant 0 = R22 1 = R134a

5 = R410A 6 = R124 7 = R744

0 7 - 3

u1

Correction glide / dp

Pressure dr op = negativ e v alues

-20.0

20.0 K 0.0

u2

MOP control
0 = MOP of f, 1 = MOP on

0 1 - 0

u3

MOP temperature

-40

40

°C 0

u4

Superheat mode 0 = off

2 = adaptive s u perheat

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

P

ANALOG SENSOR PARAMETERS

P1

Pressure sensor type sel ection

0 2 - 0 0 = PT5-07M; 1 = PT5-18M; 2 = PT5-30M

H OTHER PARAMETERS

H2

Display access

0 4 - 3

0 = all disabled (Caution, access to controller only via the TCP/IP Ethernet

Control setpoint with SEL key and manual defrost enabled.

H3

IR access code

0

199 - 0 H5

Password

0

199 - 12

List Of Parameters

EC2-352 Display Case and Coldroom Controller

1 = Air-in temperature °C
2 = Air-out temperature °C
3 = Alarm temp er ature °C
4 = Defrost termination temperature °C
5 = Coil-in temperature °C calculated from the pressure
6 = Coil-out temperature °C
7 = Calculated superheat °K
8 = Valve opening in %

Operating instruction

temperature dt or max. time dP whatever is selected

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

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

2 = by temperature Ft, error on time
3 = first, whatever comes first time or temperature, no alarm

monitoring off, no t emp. alarms generated

1 = cooling, deadband control

cut in = set-point + difference
cut out = set-point

2 = cooling, modulating thermostat

cut in = set-p oint
cut out = set-point – difference /2

3 = heating, deadband control

2 = R507 3 = R404A 4 = R407C

cut in = set-point – difference
cut out = set-point

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

Glide = positive values

1 = fixed superheat

pulsed defrost not possible

1 = forced defrost, defro st heater activated, pulsed

defrost possible

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

termination by time will generate an alarm

1 = termination by time ,

terminat ion by temperature will generate an ala r m

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

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.

Emerson Climate Technologies GmbH www.emersonclimate.eu

Am Borsigturm 31 I 13507 Berlin I Germany Date: 15.06.2016 EC2-352_OI_EN_R07_864925.doc