Emerson EC2-552 User manual

EC2-552_65098_EN_R05.docxx replacement for R04 1 / 4 PCN: 864923 30.07.2012
EC2-552 Condensing Unit 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 settlings.
More detailed information can be found in the User Manual.
The EC2-552 has been designed to control single compressor or tandem
compressor condensing units with a Copeland Scroll Digital
TM
compressor and
variable fan speed control. The purpose of the controller is to maintain suction
pressure at a pre-defined level by modulating compressors and to keep condensing
pressure to a minimum by varying fan motor speed.
The Alco Controls PT5 pressure transmitter (1) senses suction pressure. The
Digital Scroll Compressor (6) operates as the base load compressor. Capacity
modulation is achieved by temporarily unloading the compressors scroll sets with
the Pulse Width Modulated (PWM) signal (11) which controls the compressor
unloading valve (12). In tandem compressor condensing units, the single stage
compressor (7) will only be turned on when demand exceeds the refrigeration
capacity of the Digital Scroll Compressor. The discharge temperature thermistor of
the Digital Scroll Compressor should be connected to the Disch. Temp. input (5) of
the controller and the volt-free digital inputs (3) and (4) should be connected to the
serial alarm loops of both compressors for feedback of compressor tripping.
Scroll compressor
Digital scroll
compressor
setpoint pressure
2 control loops with the same suction pressure setpoint P0 modulate the
compressors. The dead band control loop with dead band P1 switches the single
stage compressor on or off, whereas a PI control loop modulates the Digital Scroll
base load compressor between approximately 10% and 100% capacity. Being the
base load compressor, the Digital Scroll Compressor will never be switched off
while the single stage compressor remains on.
The PT5 pressure transmitter (2) senses condensing pressure and feeds the signal
into a control loop which generates a 0…10V output signal (10) to modulate
condenser fan motor speed by using the Alco Controls FSP Fan Speed Power
Module. The control algorithm for condensing pressure is generating a proportional
transfer characteristic:
pressure
P0 is the condensing pressure setpoint for the fan. P1 is the proportional pressure
band within the fan speed is controlled proportional.
!
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 20VA max.
Communication TCP/IP Ethernet 10MBit/s
Plug-in connector size Removable screw terminals
wire size 0.14 … 1.5 mm
2
Temperature
storage
operating
-20 … +65°C
0 … +60°C
Humidity 0 … 80% rh. non condensing
Protection class IP65 (front protection with gasket)
Pressure transmitter inputs
24VDC, 4…20mA
Digital inputs Volt free contacts 5V/0,1mA
Variable fan speed output 0…10V, 3mA max
Triac output 24VAC 0,1…1A
Output relays SPDT contacts, AgCdO
Inductive (AC15) 250V/2A
Resistive (AC1) 250V/8A; 12A total return current
Marking
Mounting
The EC2-
552 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
(right) 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 shou
ld 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.

EC2-552_65098_EN_R05.docxx replacement for R04 2 / 4 PCN: 864923 30.07.2012
EC2-552 Condensing Unit 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.
Temporary Display Of 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
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 TCP/IP address to the default value: 192.168.1.101
•3: Resets all parameters to the factory default setting. The controller will
indicate “oF” during the reset.
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.
Display indicates suction side -
C1
Ethernet activity LED
(only active when service pin is pressed)
Display indicates condenser side - C2
Display indicates pressure in bar
Alarm condition
Compressor 2 on
IR LED
Compressor 1 on Fan on
Indications On The Display:
Compressor Controller
•State
•Alarm in combination with alarm message and alarm LED
•Suction pressure or saturation temperature from suction pressure
•Parameter
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
Controller 1: suction pressure higher than the maximum limit
Controller 2: condensing pressure higher than the maximum limit
lP Low pressure alarm
Controller 1: suction pressure lower than the minimum limit
Controller 2: condensing pressure lower than the minimum limit
d1 Discharge temperature alarm
Digital scroll only: Discharge end temperature is too high
EP Error pressure
Controller 1: suction pressure sensor failure
Controller 2: condensing pressure sensor failure
Fr Fast recovery alarm
Controller 1: fast recovery from low suction pressure
Controller 2: fast recovery from low condensing pressure
hr High discharge pressure alarm
Controller 1: high discharge pressure recovery
Controller 2: high discharge pressure recovery
rE Emergency run
Controller 1: runs with c6 numbers of compressors
Controller 2: runs with c6 numbers of fans
E1 Feedback alarm 1
Controller 1: digital input associated with compressor 1 has changed into
alarm state (safety chain)
Controller 2: digital input associated with fan(s) has changed into alarm state
(safety chain)
E2 Feedback alarm 2
Controller 1: digital input associated with compressor 2 has changed into
alarm state (safety chain)
n1 Service alarm 1
Controller 1: compressor 1 operating time higher than run limit (A9)
Controller 2: fan operating time higher than run limit (A9)
n2 Service alarm 2
Controller 1: compressor 2 operating time higher than run limit (A9)
Er Data error
Data send to thedisplay 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.

EC2-552_65098_EN_R05.docxx replacement for R04 3 / 4 PCN: 864923 30.07.2012
EC2-552 Condensing Unit Controller
Operating Instructions
GB
Controller 1 (Compressor controller)
/ DISPLAY PARAMETERS Min
Max
Unit Def Individ.
/1 Value to be shown on display 0 7 - 0
0 = compressors and fans states (controller 1 and 2)
1 = suction pressure (bar)
2 = saturation temperature from suction pressure (°C)
3 = condensing pressure (bar)
4 = saturation temperature from condensing pressure (°C)
5 = Digital Scroll capacity (%)
6 = fan speed (%)
7 = Digital Scroll discharge temperature (°C)
P SET-POINT PARAMETERS - C1
P0 Pressure set-point (suction) for
compressor circuit
-1.0
50 bar 3.0
P1 Pressure band (control band for P/PI,
dead band for dead band control mode)
0.0 50 bar 2.0
P3 Fast recovery from low pressure -9.9
50 bar -9.9
P8 High discharge pressure recovery -9.9
50 bar 50
t TIME PARAMETERS
t1
(1)
Time delay before adding capacity 0 99 10sec 3
t2
(1)
Time delay before removing capacity 0 99 10sec 3
t3
(1)
Compressor minimum on time 0 99 10sec 6
t4
(1)
Compressor minimum off time 0 99 10sec 6
t5 Maximum compressor switching 0 199 1/hr 0
A ALARM PARAMETERS - C1
A2 Minimum suction pressure alarm
limit
-1.0
50 bar 1.0
A3 Maximum suction pressure alarm
limit
-1.0
50 bar 6.0
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
A6 High discharge temperature cut-out
cut-in = cut-out – 10°C
100
140 °C 130
A8
(1)
Compressor serial alarm delay 0 99 10sec 0
A9
(2)
Compressor run limit 0 99
10 000hr
0
u STEP ENABLE PARAMETERS - C1
u0 Reset operating time 0 3 - 0
0 = do nothing
1 = reset operating time compressor 1
2 = reset operating time compressor 2
3 = reset operating time all compressors
u1 Enable/disable compressor 1 0 1 flag 1
u2 Enable/disable compressor 2 0 1 flag 1
c APPLICATION PARAMETERS - C1
c1 Number of compressors 1 2 - 2
c4 Compressor 1 control mode 0 2 - 2
0 = compressor 1 in standard control loop
1 = compressor 1 act as base load compressor
2 = compressor 1 is a digital scroll compressor & base load
c5 Compressor switch logic 0 1 flag 0
0 = FILO logic (First In, Last Out)
Capacity demand: Adds first compressor out of available com-
pressors. (= compressors where min off time (t4) is fulfilled)
Capacity excess: Removes last compressor out of available com-
pressors. (= compressors where min on time (t3) is fulfilled)
1 = Rotation enabled
Capacity demand: Adds compressor with lowest runtime out of
available compressors. (= where min off time (t4) is fulfilled)
Capacity excess: Removes compressor with highest runtimes out
of available compressors. (= where min on time (t3) is fulfilled)
c6
Number of compressors to switch on
in case of sensor failure
0 2 - 0
F MODULATING PARAMETERS -
C1
F2 Minimum output value 10 100 % 20
F3 Maximum output value 10 100 % 100
F6 PWM rate (Digital scroll) 10 20 sec 20
r SENSOR PARAMETERS - C1
r0 Suction pressure sensor minimum
value
-1.0
50 bar -0.8
SENSOR PARAMETERS - C1
(continued)
Min
Max Unit Def Individ.
r1 Suction pressure sensor maximum
value
-1.0 50 bar 7.0
r2 Pressure offset for suction pressure
-1.0 1.0 bar 0.0
r3 Refrigerant type 0 7 - 4
0 = no temperature conversion;
1=R22;2=R134a;3=R507;4=R404A;5=R407C;6=R407A;7=R407F
Controller 2 (Fan controller)
P SET-POINT PARAMETERS -
C2
P0 Pressure set-point (condensing) for
fan circuit
-1.0 50 bar 14.0
P1 Pressure band (control band for
P/PI, dead band for dead band
control mode)
0.0 50 bar 4.0
A ALARM PARAMETERS - C2
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 10kHr
0
u STEP ENABLE PARAMETERS - C2
u0 Reset operating time
0 = do nothing
1 = reset operating time fan 1
0 1 - 0
u1 Enable/disable fan 1 0 1 flag 1
c APPLICATION PARAMETERS - C2
c2 Fan controller operation
0 = disabled
1 = enabled
0 1 - 1
c6 Fan behaviour on in case of sensor
failure
0 = Analog output 0% (0 V)
1 = Analog output 100% (10 V)
0 1 - 0
F MODULATING PARAMETERS -
C2
F2 Minimum output value 0 100 % 0
F3 Maximum output value 0 100 % 100
r SENSOR PARAMETERS - C2
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
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)
Shown value x 10 = Time in seconds. Ex. a value of 2 means 20 seconds.
(2)
Shown value x 10 000 = Time in hours. Ex. a value of 2 means 20.000 hours.

EC2-552_65098_EN_R05.docxx replacement for R04 4 / 4 PCN: 864923 30.07.2012
EC2-552 Condensing Unit 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 EC2-552 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 EC2-552 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 EC2-552 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 Climate Technologies GmbH 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 Climate Technologies GmbH 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 Climate
Technologies GmbH control we cannot assume any liability for results obtained or
damages occurred due to improper application.
This document replaces all former versions
Emerson Climate Technologies GmbH, Holzhauser Strasse 180, D-13509 Berlin
www.emersonclimate.eu