Operating instruction
EC3-X32 Superheat Controller with TCP/IP
communication capability
Emerson Climate Technologies GmbH www.emersonclimate.eu
Am Borsigturm 31 I 13507 Berlin I Germany Date: 03.04.2017 EC3-X32_OI_ML_R13_865008.docx
General information:
EC3-X32 is the superheat controller with TCP/IP connection for stepper motor driven
EMERSON Electrical Control Valves EX4...EX8 and FX5…FX9.
Safety instructions:
• Read operating instructions thoroughly. Failure to comply can result in device
failure, system damage or personal injury.
• According to EN 13313 it is intended for use by persons having the
appropriate knowledge and skill.
• Do not exceed the specified maximum ratings for pressure, temperature,
voltage and current.
• Before installation or service disconnect all voltages from system and device.
• Do not operate system before all cable connections are completed.
• Entire electrical connections have to comply with local regulations.
Note: The EC3-X32 series contains a VRLA battery = valve regulated rechargeable
lead-acid 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 2012/19/EU). For further
information contact your local environmental recycling center.
Mounting position:
The EC3-X32 is designed to be mounted onto a standard DIN rail. Mounting
position: on vertical walls, with stepper motor connector on top side only.
Mounting of ECD-002:
• ECD-002 can be installed at any time also during operation.
• ECD-002 can be mounted in panels with 71x29
mm cutout.
• Push controller into panel cut-out.(1)
• Make sure that mounting lugs are flush 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
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 6.3 mm spade connector.
• Keep controller and sensor wiring well separated from mains wiring. Minimum
recommended distance 30 mm.
• Use a class II category transformer for 24VAC power supply. Do not ground the
24VAC lines. We recommend using individual transformers for EC3 controller(s)
and for 3
rd
party controllers to avoid possible interference or grounding problems
in the power supply. Connecting any EC3 inputs to mains voltage will permanently
damage the EC3.
• The use of the relay is essential to protect the system in case of power failure if the
communications interface or the ECD-002 are not utilized.
• If the output relay is not utilized, the user must ensure appropriate safety pre-
cautions are in place to protect the system against damage caused by a power
failure.
• In order to provide system protection in the event of power loss, it is recommended
to change the battery annually.
Digital input status is dependent to operation of compressor/thermostat
Demand (compressor must be ON)
Wiring:
A: White wire B: Black wire C: Blue wire D: Brown wire
E: M12 Plug cable assembly EXV-Mxx for connection to EX4…EX8 and
FX5…FX9.
G: Remote control panel, system controller.
H: Alarm relay, dry contact. Relay coil is not energized at alarm or power off.
I: Digital input (0V/open = Stop; 24V/closed = Start)
J: Transformer Class II, 24VAC secondary / 25VA
K: Third party controller (can use the analog output signal from EC3)
O: Pump down relay, dry contact. Relay is energized during normal operation.
Preparation for Start-up:
• Vacuum the entire refrigeration system.
• Note: EMERSON Electrical Control Valves EX4…EX8 and FX5…FX9 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 (open). The valve
will be driven to close position.
• After closure of valve, start to charge the system with refrigerant.
• Start the system and check the superheat and operating conditions.
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