Emerson EC3-D7x Digital Superheat Controller Operating Instructions

General Information

The EC3-D7x is a superheat controller designed for stepper motor-driven Electrical Control Valves EX4-6 from EMERSON. It is optimized to operate with the Copeland Digital Scroll series, utilizing a 0-10V input from a third-party controller. The controller synchronizes the PWM digital compressor solenoid valve with the superheat controlled by the electrical control valve (EX series). The EC3-D73 model offers the same functionality but can only be set up via the ECD-002 display, lacking external communication capabilities.

Safety Instructions

• Read operating instructions thoroughly. Failure to comply can result in device failure, system damage, or personal injury.
• Intended for use by persons with appropriate knowledge and skill, according to EN 13313.
• Do not exceed specified maximum ratings for pressure, temperature, voltage, and current.
• Disconnect all voltages from the system and device before installation or service.
• Do not operate the system before all cable connections are completed.
• All electrical connections must comply with local regulations.
• The EC3-D7x series contains a VRLA battery. This battery must not be disposed of with commercial waste. It is the user's responsibility to pass it to a designated collection point for safe recycling of batteries (harmonized directive 2012/19/EU).

Mounting Position

The EC3-D7x is designed for mounting onto a standard DIN rail. The recommended mounting position is on vertical walls, with the stepper motor connector on the top side.

Mounting of ECD-002

The ECD-002 can be installed at any time, even during operation. It can be mounted in panels with a 71x29 mm cutout. Push the controller into the panel cutout. Use the provided Allen key to turn the mounting lugs clockwise until they are flush with the outside of the controller housing. Tighten carefully to avoid breaking the mounting lugs.

Electrical Installation

• Refer to the electrical wiring diagram for connections.
• Do not apply voltage before wiring is complete.
• Ground the metal housing with a 6.3 mm spade connector.
• Keep controller and sensor wiring separated from mains wiring (minimum 30 mm distance).
• Use a Class II category transformer for 24 VAC power supply. Do not ground the 24 VAC lines.
• Individual transformers are recommended for EC3 controllers and third-party controllers to avoid interference.
• Connecting EC3 inputs to mains voltage will permanently damage the EC3.
• The use of the relay is essential for system protection in case of power failure if the communication interface or ECD-002 are not utilized.
• If the output relay is not utilized, ensure appropriate safety precautions are in place to protect the system against damage caused by power failure.
• It is recommended to change the battery annually for system protection during power loss.

Wiring Diagram

A diagram illustrates the wiring connections for the EC3-D72 controller, including power supply, digital inputs, analog inputs, outputs, and connections for the stepper motor and optional ECD-002 display. Terminal labels (A-P) are provided with corresponding wire colors and functions.

Digital Input Status

The table shows the digital input status for 'Cooling demand' and 'Comp 2 Running' in relation to the EXV (Electronic Expansion Valve) operation and the 0-10V input from a third-party controller.

Parameters and Settings

The document details various parameters for configuring the EC3-D7x controller, including refrigerant type, pressure sensor type, valve type, superheat settings, alarm functions, freeze protection, pump-down functions, and output logic. Parameters can be modified using the ECD-002 keypad or via a PC using TCP/IP communication.

Parameter Modification Procedure (ECD-002):

1. Press the PRG button for over 5 seconds until '0' flashes.
2. Press or to display the password (default '12').
3. Press SEL to confirm the password.
4. Press or to select the parameter code.
5. Press SEL to display the current parameter value.
6. Press or to increase/decrease the value.
7. Press SEL to temporarily confirm the new value.
8. Repeat for other parameters.
9. Press PRG to save and exit, or do not press any button for 60 seconds to exit without saving.

Special Functions:

Special functions can be accessed by pressing and together for over 5 seconds, then entering the password. Functions include resetting the controller to factory settings or displaying the current TCP/IP address.

TCP/IP Communication and WebPages

The EC3-D72 features a TCP/IP Ethernet communication interface for direct connection to a network or PC. Embedded WebPages allow users to visualize and modify parameter lists using a standard web browser. The default username is 'EmersonID' and the password is '12'. Live graphical data, such as superheat and temperature, can be displayed on a 15-minute rolling chart.

Connecting to a Network or PC:

• Use the optional ECC-Nxx cable or a standard CAT5 cable with RJ45 connectors to connect to a network or router.
• Alternatively, connect directly to a PC using a crossover cable, requiring manual adjustment of the PC's TCP/IP address.
• Refer to the 'TCP/IP Controller-Readme' file for detailed information.

Troubleshooting

The document provides a table for error/alarm handling, listing alarm codes, descriptions, related parameters, valve status, troubleshooting steps, and whether manual reset is required. Common symptoms like incorrect superheat, valve not closing, or unstable superheat are addressed with potential causes and actions.

Technical Data

Key technical specifications are provided, including power supply (24 VAC ±10%), power consumption (25 VA max.), connector types, protection class (IP20), communication interfaces (RJ45 Ethernet), analog input/output ranges (4-20 mA), temperature ranges (0 to +60 °C), and dimensions.

Dimensions

Diagrams show the physical dimensions of the EC3-D7x controller and the ECD-002 display unit, including cutout dimensions for panel mounting.