EC2-742_65110_EN_R03.doc Replacement for Rev.:02 1 / 4 16.09.2009
EC2-742 Condenser 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 EC2-742 controller is for use in condensers with speed controlled fan(s).
Based on the input signal from a pressure transmitter (1) an analogue 0…10 V
output signal is provided, which can be used for fan speed power modules (3) as
the FSP-series from EMERSON, see following drawing:
The PT pressure transmitter (1) senses condensing pressure and feeds the signal
into a proportional control loop with proportional band (P1) around setpoint (P0).
This control loop generates a 0…10V output signal to modulate the speed of
condenser fan motor(s) (3) by using the FSP Fan Speed Power Module (10).
Digital outputs allow to switch a stage solenoid (5) and a sprinkler valve (4).
Sprinkler
Solenoid
2-stage
Solenoid
Fan
Speed
Output
Condensing Pressure
P8 is the setpoint and P9 the differential to activate a sprinkler. P3 is the setpoint
and P2 the differential to activate the solenoid valve for two stage condenser
operation.
A NTC temperature sensor (2) may be attached for ambient air temperature
measurement. This can be used for setpoint floating. Depending on ambient
temperature, the condensing pressure setpoint may be lowered in a controlled way
resulting in a reduction of energy consumption of the overall system.
A fast recovery procedure can be used to immediately switch off fan(s) when the
condensing pressure falls below a set limit. Similarly an emergency routine can be
activated automatically if the condensing pressure exceeds a definable limit.
!
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:
Power supply 24VAC ±10%; 50/60 Hz; Class II
Power consumption 4VA max.
Communication TCP/IP Ethernet 10MBit/s
Terminals Removable screw terminals
wire size 0.14 … 1.5 mm2
Temperature
storage
operating
-20 … +65°C
0 … +60°C
Pressure sensor input 24VDC, 4 … 20mA
Temperature sensor input NTC (10K at 25°C )
Condenser and sprinkler
output relays
SPDT contacts, AgNi
Inductive (AC15) 250V / 2A
Resistive (AC1) 250V / 8A; 12A total return current
Fan variable output signal 0 … 10V; (3mA max)
Digital inputs Volt free contacts 5V/0,1mA
Humidity 0 … 80% rh. non condensing
Protection class IP65 (front protection with gasket)
Mounting
The EC2-742 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 clamps are flush with
outside of controller housing
Insert allen key into front panel holes and turn
clockwise. Mounting clamp will turn and gradually
move towards panel (2)
Turn allen key until mounting clamp barely touches
panel. Then move other mounting clamp to the same
position (3). Tighten both sides very carefully until
controller is secured. Do not over tighten as
mounting clamps will break easily.
Electrical Installation
Refer to the electrical wiring diagram for electrical connections. A copy of this
diagram is labelled 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. Volt free digital inputs should only be connected to serial
control loops or relays with gold contacts. They 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 3
rd
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.
EC2-742_65110_EN_R03.doc Replacement for Rev.:02 2 / 4 16.09.2009
EC2-742 Condenser Controller
Operating Instructions
GB
Set-up 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 "Parameter 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.
Load Default Parameters:
The default parameter settings can be reloaded into the controller memory by using
the special function described below
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: Displays the current TCP/IP address
• 2: 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
• 3: 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 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
Ethernet activity LED
(only active when service pin is pressed)
Display indicates condenser controller
Display indicates pressure in bar
Alarm condition
Stage
IR LED
Sprinkler Fan on
Indications On The Display:
Condenser fan controller
• State
• Alarm in combination with alarm message and alarm LED
• Condensing pressure or saturation temperature from condensing pressure
• Parameter
Other display
• Pressure: Pressure value in bar (g)
• Alarm: Alarm condition
• IR: IR communication enabled
Alarm Codes
hP High pressure alarm
Condensing pressure higher than the maximum limit
lP Low pressure alarm
Condensing pressure lower than the minimum limit
EP Error pressure
Condensing pressure sensor failure
Fr Fast recovery alarm
Fast recovery form low condensing pressure
n1 Service alarm 1
Fan operating time higher than run limit
Er Data error
Data send to the display is out of range
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. This function is action only when using SNMP protocol
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.
EC2-742_65110_EN_R03.doc Replacement for Rev.:02 3 / 4 16.09.2009
EC2-742 Condenser Controller
Operating Instructions
GB
Fan controller
/ DISPLAY PARAMETERS Min Max Unit Def Individ.
/1 Value to be shown on display 0 3 - 0
0 = Analog output (%)
1 = Condensing pressure (bar)
2 = Saturation temperature from condensing pressure (°C)
3 = Digital output stage
r SENSOR PARAMETERS
r0 Condensing pressure sensor
minimum value
-1.0 50 bar 0.0
r1 Condensing pressure sensor
maximum value
-1.0 50 bar 30
r2 Pressure offset for condensing
pressure
-1.0 1.0 bar 0.0
r3 Refrigerant type 0 5 - 4
0 = no temperature conversion;
1 = R22; 2 = R134a; 3 = R507; 4 = R404A; 5 = R407C
P SET-POINT PARAMETERS
P0 Pressure set-point (condensing) for
fan circuit
-50.0 50 bar / °C 14.0
P1 Pressure band (control band for P/P
I
dead band for dead band control
mode)
0.0 50 bar / K 4.0
P2 Stage valve dead band 0.0 10.0 bar 4.0
P3 Fast recovery from low pressure
Activates 2 stage condenser valve
-9.9 50 bar -9.9
P4 Enable set-point compensation
0 = disabled; 1 = enabled
0 1 - 0
P5 Maximum pressure compensation -3.0 3.0 bar -3.0
P6 Temperature at minimal shift value
(0)
-50 50 °C 30
P7 Temperature at maximal shift value
(Shift Max)
-50 50 °C 15.0
P8 High discharge pressure recovery.
Activates sprinkler valve
-9.9 50 bar 50
P9 High pressure recovery dead band.
Activates sprinkler valve
0 10.0 bar 2.0
A ALARM PARAMETERS
A2 Minimum condensing pressure
alarm limit
-1.0 50 bar 10.0
A3 Maximum condensing pressure
alarm limit
-1.0 50 bar 27
A4
(1)
Delay time for minimum pressure
alarm limit
0 99 10sec 0
A5
(1)
Delay time for maximum pressure
alarm limit
0 99 10sec 0
A9
(2)
Fan run limit 0 99 10000hr 0
C APPLICATION PARAMETERS Min Max Unit Def Individ.
C6 Fan behaviour on in case of sensor
failure
0 1 - 0
0 = Analog output 0% (0 V)
1 = Analog output 100% (10 V)
C7 Control mode (>=Rev 109)
0 = pressure
1 = medium temperature
0 1 - 0
F MODULATING PARAMETERS
F2 Minimum output value 0 100 % 0
F3 Maximum output value 0 100 % 100
F4 Fan off at min pressure
0 = disabled; 1 = enabled
0 1 - 0
H OTHER PARAMETERS
H2 Keyboard and IR remote control 0 3 - 3
0 = all disabled
(Caution, access to controller only via network possible)
1 = Keyboard enabled
2 = IR remote control enabled
3 = Keyboard and IR remote control enabled
H3 IR remote control access code 0 199 - 0
H5 Password 0 199 - 12
(1)
These values have a resolution of 10 sec, on the local display. Ex. A value 2 means 20 sec.
(2)
These values have a resolution of 10.000 hours, on the local display. Ex. A value 2 means 20.000 hours.
Note: Concerning the indicated parameters, it is recommended to check, before installing, if the factory value is suitable for the required use
EC2-742_65110_EN_R03.doc Replacement for Rev.:02 4 / 4 16.09.2009
EC2-742 Condenser Controller
Operating Instructions
GB
Visualising Data: WebPages
A TCP/IP Controller-Readme file is available on the www.emersonclimate.eu
website to provide detailed information about TCP/IP Ethernet connectivity. Please
refer to this file if you need information beyond the contents of this instruction
sheet.
The EC2-742 has a TCP/IP Ethernet communication interface enabling the
controller to be directly connected to a PC or network via the standard Ethernet
port. The EC2-742 controller has embedded WebPages to enable the user to easily
visualise the parameter lists using real text labels.
No special software or hardware is required.
Connect the EC2-742 using the optional ECX-N60 cable assembly to a network or
hub that enables the controller to receive a dynamic TCP/IP address. If a DHCP
server is not available, the controller can be connected to a computer using a
crossover cable plugged directly into the Ethernet port. In this case, the TCP/IP
address of the computer must be manually modified to be compatible with the
default address of the controller. Refer to the TCP/IP Controller-Readme file for
more details.
Open the Internet browser program on the computer and enter the default TCP/IP
address of the controller into the address line of the Internet browser:
192.168.1.101 or the dynamic address from the DHCP server. The default
communication port is 1030. Refer to the TCP/IP Controller-Readme file if a
specific port is required
After a few moments, the default monitoring page should be displayed. If the
browser does not open the default page or display active data, the user should
check the Internet browser “Option” configuration. Refer to the TCP/IP
Controller-Readme file.
In addition, for those customers wishing to connect the controllers into a larger
system, it is also possible to trap network variables using the SNMP protocol.
Refer to the User Manual for further details.
The Monitoring and Alarm WebPages are read only and therefore it is not
necessary to enter a username or password. A username and password will be
requested upon the initial request to any of the other WebPages. The factory
default settings are :
Username: EmersonID
Password: 12
The default settings may be modified in the Display configuration page.
Press the tabs at the top of the Monitoring page with a left click of the mouse
button to enter the respective Webpage.
The parameters will be visualised in real text together with the program code as
defined in the parameter list below.
After the parameters have been modified, the complete list of settings can be saved
to the memory of the computer and used later to upload into another controller.
This can save a considerable amount of time when using multiple controllers and
over a period of time, a library can be created containing the parameter lists for
equipment for different applications.
It is also possible to display live graphical data from the controller. In addition, a
permanent 30 days log file containing the control temperature at 15 minutes
intervals is stored in the non-volatile memory to be later transferred using FTP to
the computer. The log file can be imported into a standard spreadsheet program
such as Excel. Refer to the TCP/IP Controller-Readme file for a complete
description of the features available for the TCP/IP series of controllers.
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
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