Instruction Sheet
EC3-X33 Superheat Controller
PA-00320
September 2008
and ECD-002 Keypad/Display Unit
EC3-X33 Superheat Controller and ECD-002 Keypad/Display Unit
Description
EC3-X33 is a universal superheat controller used in conjunction
with Emerson Electrical Control Valves EX4...EX8.
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 ap-
propriate knowledge and skills.
• Disconnect all voltages from system before installation.
• Do not operate system before all cable connections are
completed.
• Comply with local electrical regulations when wiring.
Note: The EC3-X33 series contains a lead, acid gel recharge-
able battery. The battery must NOT be disposed of with other
commercial waste. Instead, it is the user’s responsibility to pass it
to a designated collection point for the safe recycling of batteries (harmonized directive 98/101/EEC). For further information
contact your local environmental recycling center.
Technical data
Power supply 24VAC ±10%; 50/60Hz; 1A
Power consumption 25VA max. including EX4 … EX8
Plug-in connector Removable screw terminals wire size 12-20 AWG
Grounding 1/4 in spade earth connector
Protection class IP20
Connection to ECD-002 ECC-Nxx or CAT5 cable with RJ45 connectors
Digital Inputs 0/24VAC/DC for stop/start function
NTC input Emerson temperature sensor ECN-N60
4-20 mA Analog input Emerson PT4-07M / PT4-18M / PT4-30M
4-20 mA Analog output For connection to any 3rd party controller with
12/24VDC power supply and appropriate burden
Output alarm relay SPDT contacts 24V AC/DC, 2 Amp inductive load
Activated: During normal operation (no alarm condition)
Deactivated: During alarm condition or power supply is OFF
Stepper motor output for Maximum current 0.8A with nominal 24VDC
EX4…EX8 operating voltage
Mounting
The EC3-X33 is designed to be mounted onto a standard DIN rail.
Electrical Installation
• Refer to the electrical wiring diagram for electrical connections.
• Do not apply voltage to the controller before completion of wiring.
• Ground the metal housing with a 1/4 in spade connector.
• Important: Keep controller and sensor wiring well separated from
mains wiring. Minimum recommended distance 1.2 in.
Warning: Use a class II category transformer for 24VAC power
supply. Do not ground the 24VAC lines. We recommend to use
individual transformers for EC3 controller(s) and for 3rd party
controllers to avoid possible interference or grounding problems
in the power supply. Connecting any EC3 inputs to mains voltage
Preparation for Start-up
• Evacuate the entire refrigeration circuit.
Warning: Emerson Electrical Control Valves EX4...EX8 are delivered at half open position. Do not charge system before closure
of valve.
• Apply supply voltage 24V to EC3 while the digital input is 0V.
The valve will be driven to close position.
• After closure of valve, start to charge the system with refrigerant.
Warning: EC3 needs to be setup prior to start-up. Do not apply
24V digital input to EC3 before completion of main parameters
setting.
• Connect ECD-002 to EC3 as shown in wiring diagram with
ECC-Nxx cable or with any standard straight Cat5 cable with
two RJ45 plugs.
Setup of main parameters (need to be
checked/modied before start-up) using ECD-002
• Make sure that digital input is 0V (open). Turn the power supply
ON.
Important: Three main parameters i.e. refrigerant type (u0), pressure sensor type (uP) and valve type (ut) can be set only when
digital input is open (0V) while the power supply is ON (24V).
This feature is for added safety to prevent accidental damage of
compressors and other system components.
• For easy setting of main parameters, follow the pictorial procedure of “Quick start-up” on the attached individual paper.
Once the main parameters have been selected/saved the EC3
is ready for startup. All other parameters can be modied at
any time during operation or standby if it is necessary.
Start-up
Start the system and check the superheat and operating conditions. The EC3-X33 is fully functional without keypad/display unit.
ECD-002 may be removed or connected at any time.
Digital input status is dependant to operation of compressor/thermostat
Commander Operating condition Digital input
Compressor Compressor starts Closed / 24V (Start)
Compressor stops Open / 0V (Stop)
Thermostat Demand (compressor must be ON) Closed / 24V (Start)
No demand Open / 0V (Stop)
www.emersonclimate.com/owcontrols
11911 Adie Road P.O. Box 411400 St. Louis MO 63141 USA CUSTOMER SERVICE (314) 569-4666
Sec.
uu
u9
%
EC3-X3 BA.cdr
ECD-002 Display/Keypad Unit
Blinking: valve is closing
ON: valve is fully closed
Blinking: valve is opening
ON: valve is fully open
Parameters setting/saving
Next parameter
/
value (higher)
Next parameter/
value (lower)
Selecting/confirming
Prg & Sel (5 sec)
Manual reset for
blinking alarm codes
ON: alarm
OFF: no alarm
ON: demand
OFF: no demand
5.4
2.9
4.1
2.5
3.1
1.42
.2
1.44
Cutout 2.8 x 1.1 in
(LEDs and Button Functions)
Procedure for parameters modication using ECD-002
The parameters can be accessed via the 4-button keypad. The con-
guration parameters are protected by a numerical password. The
default password is “12”. To select the parameter conguration:
• Press the PRG button for more than 5 seconds, a ashing “0” is
displayed.
• Press or until "12" is displayed (password).
• Press SEL to conrm password.
• 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 conrm 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 conrm the new values and exit the parameters
modication procedure.
To exit without modifying any parameters:
• Do not press any button for at least 60 seconds (TIME OUT).
Wiring
Reset all parameters to factory setting:
• Make sure that digital input is 0V (open).
• Press or together for more than 5 seconds, a ashing "0" is
displayed.
• Press or until the password is displayed
(Factory setting = "12").
If password was changed, select the new password.
• Press SEL to conrm password.
"0" is displayed.
• Press SEL to reset all parameters to factory setting.
• Press PRG to activate the function and leave the special function
mode.
Control (valve) start-up behavior (Parameter uu and u9)
EX4/5/6 ≤ 1.5 seconds
EX7 ≤ 3.2 seconds
EX8 ≤ 5.2 seconds
Dimensions
EC3-X33
A: White wire B: Black wire C: Blue wire D: Brown wire
E: Plug cable assembly EX5-Nxx for connection to EX4/EX5/EX6/
EX7/EX8
F: Remote control panel, system controller
G: Alarm relay, dry contact. Relay coil is not energized at Alarm or
power off
H: Digital input (0V/open = Stop; 24V/closed = Start)
I: Transformer Class II, 24VAC secondary / 25VA
J: Third party controller (can use the analog output signal from
EC3)
ECD-002
2
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