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
Main parameters (must be checked and modied if necessary)
Factory Field
Code
Parameter description & choices Min Max
H5 Password 1 199 12
u0 System Refrigerant 0 7 1
0 = R22; 1 = R134a; 2 = R507; 3 = R404A; 4 = R407C;
5 = R410A; 6 = R124; 7 = R744 (subcritical application)
uP Installed pressure sensor type 0 1 0
0 = PT4-07M (for R22/R134a/R507/R404A/R407C/R124)
1 = PT4-18M (for R410A)
2 = PT4-30M (for R744, subcritical)
ut Installed valve type 1 5 5
1 = EX4; 2 = EX5; 3 = EX6; 4 = EX7; 5 = EX8
Mounting of ECD-002
ECD-002 can be installed at any time also during operation.
• ECD-002 can be mounted in
panels with 2.8x1.1 in cutout
• Push controller into panel cutout.(1)
• Make sure that mounting lugs are
ush with outside of controller
housing
• Insert allen key into front panel
holes and turn clockwise. Mounting lugs will turn and gradually
move towards panel (2)
• Turn allen key until mounting lug
barely touches panel. Then move
other mounting lug to the same
position (3)
• Tighten both sides very carefully
until keypad is secured. Do not
over tighten as mounting lugs will
break easily.
Error/Alarm Handling
Alarm Related Alarm Requires manual reset
code Description parameter relay Valve What to do? after resolving alarm
E0 Pressure transmitter error - Signalling Fully close Check wiring connection and measure the signal 4 to 20 mA No
E1 Temperature sensor error - Signalling Fully close Check wiring connection and measure the resistance of sensor No
AΠ EX4…EX8 electrical - Signalling - Check wiring connection and measure the resistance of winding No
connection error
AL Low superheat (<1°F) uL: 1 Signalling Fully close Check wiring connection and operation of valve No
AL blinking uL: 2 Signalling Fully close Yes
Ab b1: 1 - Regulating Battery potentially does not have enough charge to close valve in case Ab Battery error b1: 2 Signalling Fully close of main power supply interruption. May occur temporarily with new Ab blinking b1: 3 Signalling Fully close controllers or after long storage but should disappear when battery is Yes
charged sufciently. If Ab remains active even when battery is charged,
battery may be defective and should be replaced.
Er Data error display – - - - Data send to the display is out of range. Check temperature No
out of range and pressure sensor.
Note: When multiple alarms occur, the highest priority alarm is displayed until being cleared,
then the next highest alarm is displayed until all alarms are cleared. Only then will parameters be shown again.
Checking system operating conditions
The data to be permanently shown on the display can be selected by the user
(parameter ┌┘1). It is possible to temporarily display these values. However,
this function is not available in an alarm condition. The display will show for
Service/Troubleshooting
Symptom Cause Action
Operating superheat is several degrees higher or Incorrect signal from pressure or 1- Check the sensors
lower than set-point temperature sensors 2- Make sure ECN-N60 temperature sensor is used
3- For optimum accuracy, please use:
PT4-07M for R22/R134a/R507/R404A/R407C/R124
PT4-18M for R410A
PT4-30M for R744
4- Make sure the sensor cables are not installed along
with other high voltage cables
Operating superheat is too low i.e. compressor wet running 1- Incorrect wiring of ECVs 1- Check the wiring
2- Defective sensors 2- Check the sensor
Valve is not fully closed 1- The digital input is ON (24V) 1- Valve is shut off only when the digital input is turned off (0V)
2- Wrong setting of parameter ut. 2- Check the setting of parameter ut
Instable superheat (hunting) Evaporator is designed to operate Increase the superheat set-point
at higher superheat
Valve opens when EC3 commands to close and vice versa Wrong wiring between EC3-X33 Correct the wiring
and valve
EX8 is not able to open at high differential pressure Wrong setting of parameter ut Check the parameter ut. (Larger valve requires higher torque
and higher current)
Superheat set-point is shifting after several months of Stepper motor driven valves
uninterrupted operation or permanent jumper of 24V require synchronization once every week for 5 seconds if compressor never stops.
digital input
Setting Setting
Optional parameters
(recommended factory setting for majority of applications)
Factory Field
Code
Parameter description & choices Min Max
uu Start valve opening (%) 10 100 50
u9 Start opening duration (second) 1 30 5
uL Low superheat alarm function 0 2 1
0 = disable (for ooded evaporator)
1 = enable auto reset 2 = enable manual reset
Cut-out at 1°F (if it maintains 1 min.); Cut-in immediately at 6°F
u5 Superheat set-point (°F)
If uL enabled (auto or manual) 5.4 54 10.8
If uL disabled 0.9 54 10.8
u2 MOP function 0 1 1
0 = disable 1 = enable
u3
MOP set-point (°F) saturation temperature
Factory setting is according to selected refrigerant (u0):
+55°F for R22 +59°F for R134a +45°F for R507
+45°F for R404A +59°F for R407C +59°F for R410A
+122°F for R124 +23°F for R744
┌┘5 Units conversion (only for u3, u5, ┌┘1) 0 1 0
0 = °C, K, bar 1 = °F, R, psig
(Psig values are divided by 10. Example: Display 12.5 is 125 psig)
┌┘1 Value to show 0 4 0
0 = Measured superheat (F) 1 = Measured evaporator pressure (psi)
2 = Valve opening (%) 3 = Measured coil-out temp. (°F)
4 = calculated evaporating temperature (°F) from the pressure
b1
Battery error management, when battery
is defective (EC3-X33 only), see below:
Alarm Reset possibility after
Value Display Alarm Relay Valve recovery/replacement
0 – – Regulating –
1 Ab – Regulating –
2 Ab Signalling Fully close Auto
3 Ab Signalling Fully close Manual
(blinking)
* Min. and Max. setting values are dependant to selected type of refrigerant.
Message
— No data to display
The display will show an “—” at start up and when no data is sent to ECD-002
one second the numerical identier of the data (see ┌┘1 parameter) and then
the selected data. After 5 minutes, the display will return to the value selected
by parameter ┌┘1.
3
Do not apply permanent 24V digital input. Interrupt digital input
* * X
0 3 2
Setting Setting
Quick Start Up
0 V
EC3-X33
24 V AC
5 sec.
12x
1-199
88
R 410A
EC3-X33
24 V AC
24 V
EX4, EX5
EX6, EX7
EX8
Po => To
Ts
Vo (%)
Ts (°C) To (°C)SH = Ts - To (K)
100%
0%
Po (barg)
EC3X_65130.cdr
R22
EC3-X33 & ECD-002
0
1
1a
1b
1c
1d
2
2a
2b
2
3
3a
0 = R22
1 = R134a
2 = R507
3 = R404A
4 = R407C
5 = R410A
6 = R124
7 = R744
4
4a
4b
4c
4d
4e
1 = EX4
2 = EX5
3 = EX6
4 = EX7
5 = EX8
1e
Display of Data:
3b
0 = PT4-07S
(R22/R134a/R507/R404A/R407C/R124)
1 = PT4-18S (R410A)
2 = PT4-30S (R744)
3c
4
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