Emerson EC2 311 Thermostat User Manual

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EC2-311 Display Case and Coldroom Controller  
GB  
Operating Instructions  
Note: This document contains short form instructions for experienced users.  
Technical Data  
Use last column in List of Parameters to document your individual settings.  
More detailed information can be found in the User Manual.  
EC2 Series Controller  
Power supply  
24VAC ±10%; 50/60 Hz; Class II  
20VA max including EX2.  
LonWorks® Interface, FTT10, RJ45 connector  
Power consumption  
Communication  
Plug-in connector size  
Removable screw terminals  
wire size 0.14 … 1.5mm2  
Temperature  
storage  
-20 … +65°C  
0 … +60°C  
operating  
Humidity  
Protection class  
Output relays  
0…80% r.h. non condensing  
IP65 (front protection with gasket)  
(3) SPDT contacts, AgCdO  
Inductive (AC15) 250V/2A  
The EC2-311 is a dedicated refrigeration controller with superheat control and a  
driver for an Alco Controls Electric Control Valve EX2. In addition the EC2-311  
controls air temperature and manages defrost and fan(s).  
Resistive (AC1) 250V/8A; 12A total return current  
24VAC, 0.1 … 1A  
Network  
Triac output for EX2  
Electrical Control Valve  
Coil (ASC 24V only)  
Marking  
Mounting  
The EC2-311 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)  
6
4
8
5
1
2
Make sure that mounting lugs are flush with outside  
of controller housing  
3
9
Insert allen key into front panel holes and turn  
clockwise. Mounting lugs will turn and gradually  
move towards panel (2)  
7
Turn allen key until mounting lug barely touches  
panel. Then move other mounting lug to the same  
position (3)  
Two ECN-Pxx pipe temperature sensors (1) and (2) measure saturated suction gas  
temperatures at the evaporator inlet and 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 ECN-Sxx air temperature  
sensors (3) and (4) measure air-in and air-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.  
Tighten both sides very carefully until controller is  
secured. Do not over tighten as mounting lugs will  
break easily.  
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.  
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)  
!
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  
EC2 analog inputs are for dedicated sensors only and should not be connected to  
any other devices. Connecting any EC2 inputs to mains voltage will permanently  
damage the EC2.  
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 61558). Do not ground the 24VAC lines. We recommend to use one  
rd  
transformer per EC2 controller and to use separate transformers for 3 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.  
EC2-311_65081_EN_R08.doc  
Replacement for Rev.:06  
1 / 4  
PCN: 864 911 20.03.2008  
href="
EC2-311 Display Case and Coldroom Controller  
GB  
Operating Instructions  
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-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 high as possible.  
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  
(
(
5) ECN-Fxx fin temperature sensor: Position on the evaporator, asymmetric closer  
Special Functions:  
to the expansion valve.  
The Special Functions can be activated by:  
Recommendations for mounting both pipe sensors: 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.  
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  
Both air temperature sensors should be mounted on spacers in the air duct so that  
there is airflow around.  
 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.  
Caution: The sensor cables can be extended if necessary. The connection must be  
protected against water and dust.  
The superheat control is based on the two temperature sensors (1) and (2). The  
coil-in simulates the saturated suction temperature. Though the suggested position  
is the first return bend, alternative positions may be selected but the measured  
temperature should be checked against the pressure measured at the suction header.  
The evaporator outlet temperature sensor should be mounted on the common  
suction header of the evaporator. The superheat is calculated from the difference  
between these two sensors.  
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.  
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.  
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  
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)  
IR LED  
Logical status of compressor relay  
LON service LED  
Press SEL to confirm password  
The first modifiable parameter code is displayed (/1).  
To modify parameters see Parameters modification below.  
Logical status of fan relay  
Logical status of defrost heater relay  
Alarm condition  
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.  
EC2-311_65081_EN_R08.doc  
Replacement for Rev.:06  
2 / 4  
PCN: 864 911 20.03.2008  
href="
EC2-311 Display Case and Coldroom Controller  
GB  
Operating Instructions  
List Of Parameters  
/
DISPLAY PARAMETERS  
Min Max Unit Def. Custom  
Min Max Unit Def. Custom  
/
1
Value to show  
0 9 -  
= Thermostat control temperature with Temp. alignment °C  
= Air-in temperature °C  
= Air-out temperature °C  
= Alarm temperature °C  
= Defrost termination temperature °C  
= Coil-in temperature °C  
= Coil-out temperature °C  
= Calculated superheat °K  
= Valve opening in %  
0
d3 Pulsed defrost  
0
1
-
0
0
1
2
3
4
5
6
7
8
9
0
=
off, no pulsed defrost, heaters switched off at defrost termin-  
ation temperature dt or max. time dP whatever is selected  
on, pulsed defrost, dd and dH in use, heaters are switched off at  
dH and switched on again at dH – dd  
1
=
d4 Defrost at startup  
d5 Delay power up defrost  
d6 Pump down delay  
0 = no, 1 = yes  
0
0
0
1
-
0
0
0
180  
180  
min  
sec  
Compressor will run during pump down delay while valve is closed  
d7 Drain delay  
d8 Injection delay  
0
0
15  
180  
min  
sec  
2
0
= Displays defrost status  
/
/
/
/
2
5
6
7
Alarm suppression 0= off, 1 = on  
0
0
0
0
1
1
1
2
-
-
-
-
0
0
0
0
Valve is open during injection delay while compressor is not running  
Temperature Unit  
Decimal point  
0 = °C, 1 = °F  
0 = yes, 1 = no  
d9 Demand defrost mode  
0
2
-
0
0
2
= off, 1 = on,  
Display during defrost  
= on together with timed defrost  
0
= dF (= defrost mode); 1 = dF + defrost termination temp.  
dd Pulsed defrost differential  
dH Pulsed defrost setpoint  
dt Defrost termination temperature  
dP Max defrost duration  
1
20  
dt  
K
°C  
°C  
min  
h
2
5
2
= dF + control temperature  
-40  
/
C Temperature alignment for /1=0  
ALARM-PARAMETERS  
- 20 20  
K
0.0  
-40 90  
8
A
0
0
0
180  
192  
180  
30  
8
30  
A0 Mean factor alarm temperature  
A1 Low temp alarm delay  
A2 High temp alarm delay  
A3 Alarm delay after defrost  
AH High temp alarm limit  
AL Low temp alarm limit  
At Alarm limit type  
0
0
100  
180  
180  
180  
%
100  
5
dI Defrost interval  
du Start up delay after synch  
min  
min  
min  
min  
0
5
F
FAN-PARAMETERS  
0 = on  
0
AL  
10  
F1 Fan startup by:  
0
4
-
0
70 °C / K 40  
1
= delayed by time Fd, error on temperature  
-55 AH °C / K -50  
0
2 = by temperature Ft, error on time  
3 = first, whatever comes first time or temperature, no alarm  
= last, time and temperature must come, no alarm  
F2 During no cooling  
1
-
0
4
0
=absolute temperatures °C; 1= relative temperatures K to setpoint  
0
3
-
0
r
THERMOSTAT-PARAMETERS  
0
= on; 1 = off; 2 = delayed by F4; 3 = off, when door open  
r1 Min setpoint  
-50  
r2  
°C  
°C  
-
- 50  
40  
1
F3 During defrost  
0 = on, 1 = off  
0
0
0
0
1
30  
1
-
0
0
0
0
0
r2 Setpoint max  
r1 + 60  
F4 Stop delay time  
min  
-
r3 Day/night control  
r4 Thermostat mode  
0 = off, 1 = on  
0
0
1
4
-
1
F5 During cleaning  
Fd Fan delay after defrost  
Ft On temp after defrost  
0 = off, 1 = on  
0
=
off, no thermostat function, continues cooling air in sensor  
monitoring off, no temp. alarms generated  
cooling, deadband control  
30  
min  
°C  
-40 40  
1
=
C COMPRESSOR-PARAMETERS  
C0 Delay first start after power up  
C1 Cycle time  
cut in = set-point + difference  
0
0
0
0
15  
15  
15  
15  
min  
min  
min  
min  
0
0
0
0
cut out = set-point  
2
3
4
=
=
=
cooling, modulating thermostat  
C2 Min stop time it  
C3 Min run time  
cut in = set-point  
cut out = set-point – difference /2  
heating, deadband control  
u
SUPERHEAT PARAMETERS  
cut in = set-point – difference  
u0 Refrigerant 0 = R22, 1 = R134a,  
0
7
-
3
cut out = set-point  
2 = R507; 3 = R404A; 4 = R407C; 5 = R410A; 6 = R124; 7 = R744  
on, external control using nvi Valve via SNMP. Air in and air  
out sensor monitoring off. Temp. alarms will be generated  
u1 Correction glide / dp  
-20.0 20.0  
K
0.0  
Glide  
= positive values  
r6 Setpoint night  
r1  
r2  
°C  
K
4.0  
2.0  
100  
50  
2.0  
2.0  
Pressure drop = negative values  
u2 MOP control  
r7 Differential night  
r8 Mean factor, day operation  
r9 Mean factor, night operation  
rd Differential day  
0.1 20.0  
0
1
-
0
0
= MOP off, 1 = MOP on  
0
0
100  
100  
%
%
K
u3 MOP temperature  
u4 Superheat mode  
-40 40  
°C  
-
0
1
0 = off  
0
2
0.1 20.0  
1
2
= fixed superheat  
St Setpoint day  
r1  
r2  
°C  
= adaptive superheat  
d
DEFROST PARAMETERS  
u5 Superheat init setpoint  
u6  
3
u6  
25  
u7  
u7  
20  
75  
K
K
K
%
6
3
15  
30  
d0 Defrost mode  
0
2
-
1
u6 Superheat setpoint min  
u7 Superheat setpoint max  
uu Start opening  
0
1
2
=
=
=
natural defrost, defrost heater not activated  
pulsed defrost not possible  
forced defrost, defrost heater activated, pulsed  
defrost possible  
H OTHER PARAMETERS  
H2 Display access  
forced defrost, defrost heater activated, pulsed defrost possible,  
defrost termination using nviStartUp via SNMP  
0
4
-
3
0
= all disabled (Caution, access to controller only via LON  
network possible)  
d1 Termination by:  
0
3
-
0
1
0
=
termination by temperature,  
1 = Keyboard enabled  
termination by time will generate an alarm  
termination by time,  
2 = IR remote control enabled  
1
=
3 = Keyboard and IR remote control; Temporary data display and  
manual defrost enabled.  
termination by temperature will generate an alarm  
2
3
=
=
first, what ever comes first time or temperature, no alarm  
last, by time and temperature, no alarm  
4 = Keyboard and IR remote control; Temporary data display  
disabled. Control setpoint with SEL key and manual defrost  
enabled.  
d2 Defrost termination sensor  
0
1
-
0
1
= Dedicated defrost sensor must be installed  
= Air-out sensor used for defrost termination  
H3 IR access code  
H5 Password  
0
0
199  
199  
-
-
0
12  
EC2-311_65081_EN_R08.doc  
Replacement for Rev.:06  
3 / 4  
PCN: 864 911 20.03.2008  
href="
EC2-311 Display Case and Coldroom Controller  
GB  
Operating Instructions  
Formula for Mean Factors A0, r8, r9  
Temperature calculation by the following formula:  
Temperature = Airin * (1 - Mean Factor / 100) + Airout * Mean Factor / 100  
Examples:  
Visualising Data: LON Monitoring Server  
The EC2-311 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 nr. 804 381, with RJ45 to open,  
cable length 3m).  
Mean factor = 0  
Mean factor = 100, Temperature = Air out  
Mean factor = 50 Temperature = Average between Air-in and Air-out  
,
Temperature = Air in  
Neuron ID / Service PIN:  
,
The service pin is available on the display. It is used to identify the controller in a  
Alarm Codes  
LON network. Press the  
button for app. 1 second to send the Neuron ID. The  
E0  
E1  
E2  
Coil in sensor alarm  
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.  
Coil out sensor alarm  
Air-in sensor alarm This Alarm Code is inhibited if no air-in sensor used  
(
A0, r8 and r9 = 100)  
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)  
E3  
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.  
Data error display - out of range  
Er  
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  
Ar  
Superheat, emergency operation  
Sensor(s) failure  
No refrigerant flow detected  
No refrigerant flow was detected  
Au  
dt  
Valve open 100% for more than 10 minutes  
Forced defrost termination (time or temperature)  
Forced fan startup (time or temperature)  
Ft  
Messages  
-
--  
No data to display  
The display will show an “---” at node start up and when no data is send to  
the display.  
In  
Id  
Reset to default values activated  
The display will show an “In” when the factory default configuration data set  
is initialized.  
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  
dP  
Defrost standby  
Pump down  
dF Defrost cycle  
dd  
dI  
Defrost drain delay  
Defrost injection delay  
Defrost start-up delay  
du  
Cn Cleaning  
CL Alarms are cleared  
Emerson Electric GmbH & Co OHG is not to be held responsible for erroneous knowledge of today. It is intended only for use by persons having the appropriate  
literature regarding capacities, dimensions, applications, etc. stated herein. technical knowledge and skills, at their own discretion and risk. Since conditions of  
Products, specifications and data in this literature are subject to change without use are outside of EMERSON’s control we cannot assume any liability for results  
notice. The information given herein is based on technical data and tests which obtained or damages occurred due to improper application.  
EMERSON believes to be reliable and which are in compliance with technical 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  
EC2-311_65081_EN_R08.doc  
Replacement for Rev.:06  
4 / 4  
PCN: 864 911 20.03.2008  

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