Emerson EC1-233 - User Manual

EC1-233_65150_EN_R02.doc Replacement for R01 1 / 2 Part No. 864 908 07.07.2008
EC1-233 Display Case and Coldroom 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 settings.
The EC1-233 is a dedicated refrigeration controller which controls air temperature
and manages defrost and fan(s).
S1
S5
2
3
4
2
EC1_Blockdiagr.cdr
9
7
The ECN-Sxx air temperature sensor S1(7) is used for measuring the air
temperature and may be installed to measure either the air-in or air-out temperature
of the evaporator to feed a signal to the controller for controlling the thermostat
function. A relay output is used to control the refrigerant flow to the Thermo-
Expansion Valve by switching a solenoid valve (2) and / or the compressor. An
ECN-Sxx sensor S5 (9) is used for defrost termination and may be installed in
either the air outlet duct or inserted into the evaporator coil. The controller has
relay outputs to control the solenoid valve / compressor (2), defrost heater (3) and
evaporator fan (4). Please consult the technical data (right) for input and output
ratings. Refer to the parameter list on page 3.
!
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. Maximum
current permitted through the common live terminal (pin1) is 15Amps.
• Mains voltage; Caution should be made when removing the electrical cover
against electrical shock
• Disconnect all voltages from system before installation.
• Keep temperatures within nominal limits.
• Comply with local electrical regulations when wiring
Technical Data
Power supply
230VAC ±10%; 50/60 Hz; Class II
Power consumption 3VA max.
Communication n/a
Connector size Fixed screw terminals
wire size 0.14 … 1.5 mm
2
Temperature
storage
operating
-20 … +65°C
0 … +60°C
Humidity 0…80% r.h. non condensing
Protection class IP65 (front protection with gasket)
Output relays (3) SPST contacts, AgCdO, sealed
Inductive (AC15) 250V/2A
Resistive (AC1) 250V/8A;
!
Max. current 15A total supply current on pin1
Mounting
The EC1-233 can be mounted into a panel with a 71 x 29 mm cutout. See
dimensional drawing below for space requirements including rear cable protector.
Remove cable protector and mounting clips. (Move clip away from front side while
pushing at point P see dimensional drawing below).
Push controller into panel cutout (1) ensuring the gasket is positioned on the outer
surface.
Place the mounting clip onto the controller ensuring the spring is nearest the panel.
Push each clip forward until the controller is firmly held in place. The spring on the
clip should be compressed and the gasket firmly secured to prevent dust and
moisture ingress.
Electrical Installation
Connect wires to terminals as per diagram below and replace cable protector at rear
side. Refer to the electrical wiring diagram (below) for electrical connections. A
copy of this diagram is mounted on the controller. Use connection wires/cables
suitable for 90°C operation (EN 60730-1)
EC1 analog inputs are for dedicated sensors only and should not be connected to
any other devices. The controller has an internally mounted transformer allowing a
“mains” 230V 50/60Hz power supplier to be connected directly.
Important: Keep controller and sensor wiring well separated from mains wiring.
Minimum recommended distance 30mm.
Recommended Sensor Positions in Detail:
(7) ECN-Sxx air-in temperature sensor, S1: Position centrally below the air inlet
grille. In applications where the average ambient temperature is above 25°C, it may
be advisable to mount the air sensor in the lower air discharge duct (air-out of the
evaporator).
The air temperature sensor should be mounted on spacers in the air duct so that
there is airflow around it and it is not in contact with any surface material which
could produce a false temperature reading.
(9) ECN-Sxx defrost temperature sensor, S5: Position in the evaporator,
asymmetric closer to the expansion valve or in the air-outlet duct immediately after
the evaporator (only if S1 is mounted in the air-in duct).
Caution: The sensor cables can be extended if necessary. The connection must be
protected against water and dust.
Setup and Parameter Modification Using the Keypad
The parameters can be accessed via the 4-button keypad or may be more efficiently
programmed using a copy key. Refer to further details below. The parameters are
arranged in two sections; user and administration allowing two levels of access.
Security lock for parameter modification:
Press the
and buttons simultaneously for 10 seconds to unlock/lock the
controller parameters. “On” (unlocked) / “OF
F” (locked) will be displayed on the
screen respectively. When locked, the parameters may be visualized but cannot be
modified.
User parameters:
• Press the Prg button for more than 3 seconds. When active, the “prg” LED will
be illuminated and the first parameter “St” will be displayed.
To modify parameters see Parameters modification below.
Administration parameters:
• Press the Prg simultaneously with the
button for more than 10 seconds. When
active, the “prg” LED will be illuminated and the first parameter “St” will be
displayed.
To modify parameters see Parameters modification below.
• When parameter programming has been completed, press the Prg button to revert
back to operation mode. The Prg LED will be turned off.

Summary

General Safety Instructions

Thorough Installation Review

Ensures proper installation to prevent device failure, damage, or injury.

Electrical Rating Compliance

Adhere to technical data electrical ratings to prevent exceeding limits.

Terminal Current Limit

Maximum current for common live terminal (pin1) is 15 Amps.

Mains Voltage Safety

Caution is required when removing cover due to mains voltage and electrical shock risk.

Pre-Installation Voltage Disconnection

Disconnect all system voltages before commencing installation.

Temperature Limit Adherence

Maintain operating temperatures within specified nominal limits.

Local Electrical Code Compliance

Ensure all wiring complies with applicable local electrical regulations.

Electrical Installation

Terminal Wiring and Cable Protector

Connect wires to terminals per diagram and replace rear cable protector.

Analog Input Restriction

Analog inputs are for dedicated sensors only; do not connect other devices.

Wiring Separation

Keep controller/sensor wiring separate from mains wiring by at least 30mm.

Parameter Modification Procedure

Entering Parameter Mode

Saving Parameter Changes

Copy Key Procedure

Upload Procedure

Download Procedure

Process Caution

Alarm Codes

High Temperature Alarm (AH)

Low Temperature Alarm (AL)

Sensor Error (Er)

Indicates an air or defrost sensor is open circuit.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The EC1-233 is a dedicated refrigeration controller designed to manage air temperature, defrost cycles, and fan operations in display cases and cold rooms. It features a user-friendly interface with a 4-button keypad and an LED display, providing clear indications of operational status and parameters.

Function Description

The core function of the EC1-233 is to maintain a desired air temperature within a refrigerated environment. It achieves this by controlling the refrigerant flow, typically through a solenoid valve and/or compressor, and managing defrost heaters and evaporator fans. The controller utilizes two ECN-Sxx temperature sensors: S1 for air temperature measurement and S5 for defrost termination.

The S1 air temperature sensor can be positioned to measure either the air-in or air-out temperature of the evaporator, providing crucial data for thermostat control. In environments where average ambient temperatures exceed 25°C, it is recommended to mount the air sensor in the lower air discharge duct for more accurate readings. Proper placement of the S1 sensor involves mounting it on spacers within the air duct to ensure airflow around it and prevent contact with surfaces that could skew temperature readings.

The S5 defrost temperature sensor is strategically placed within the evaporator, typically closer to the expansion valve or in the air-outlet duct immediately after the evaporator (if S1 is in the air-in duct). This sensor is critical for initiating and terminating defrost cycles, preventing excessive ice buildup while optimizing energy consumption.

The controller offers various fan modes, allowing for flexible operation. Fans can be set to start/stop with cooling, remain off during defrost, or run continuously. A fan delay after defrost can also be configured to ensure optimal performance.

Alarm functions are integrated to alert users to potential issues. High and low-temperature alarm limits can be set, with adjustable delays to prevent nuisance alarms from transient temperature fluctuations. A sensor error alarm indicates an open circuit in either the air or defrost sensor, prompting immediate attention.

Usage Features

The EC1-233 is designed for ease of use and flexibility in parameter configuration.

Mounting: The device is designed for panel mounting with a standard 71 x 29 mm cutout. Installation involves removing the cable protector and mounting clips, pushing the controller into the cutout with the gasket positioned on the outer surface, and then securing it with the mounting clips. This ensures a firm hold and prevents dust and moisture ingress.

Electrical Installation: Wiring connections are made to clearly labeled terminals at the rear of the device. The controller has an internally mounted transformer, allowing direct connection to a 230V 50/60Hz power supply. It is crucial to keep controller and sensor wiring well separated from mains wiring, with a minimum recommended distance of 30mm, to prevent interference.

Parameter Modification: Parameters can be accessed and modified via the 4-button keypad or more efficiently using a copy key. The parameters are organized into user and administration sections, providing two levels of access.

• Security Lock: The controller features a security lock to prevent unauthorized parameter changes. Pressing the up and down buttons simultaneously for 10 seconds toggles the lock/unlock status, indicated by "On" (unlocked) or "OFF" (locked) on the display. When locked, parameters can be viewed but not modified.
• User Parameters: To access user parameters, press the "Prg" button for more than 3 seconds. The "prg" LED will illuminate, and the first parameter, "St," will be displayed. Users can then navigate through parameters, view current values, and adjust them using the up and down buttons. Pressing either button for 3 seconds increases the speed of value change.
• Administration Parameters: To access administration parameters, press the "Prg" button simultaneously with the down button for more than 10 seconds. Similar to user parameters, the "prg" LED will illuminate, and "St" will be displayed, allowing for navigation and modification.
• Saving Settings: After completing parameter programming, pressing the "Prg" button reverts the controller to operation mode, and the "Prg" LED turns off. Alternatively, if no button is pressed for 15 seconds, the controller will automatically revert to operation mode and save any modified settings.

Copy Key Procedure: The EC1-233 supports a copy key for quick and efficient parameter transfer between controllers.

• Upload Procedure: With the controller powered, plug the copy key into the mini USB port. Press the down button, and "UPL" will be displayed. Press the "Prg" button to start the upload process to the copy key. Power must be turned off before removing the copy key.
• Download Procedure: Turn off power before inserting the copy key. Turn power on, and the controller will automatically detect the copy key and begin downloading stored parameters, displaying "DOW." Power must be turned off before removing the copy key to prevent data corruption. After downloading, power should be turned on, and parameter values checked.
  • Caution: It is critical not to turn off the controller during upload/download. An "Err" message will display if an error occurs. Any attempt to download a second set of parameters to the copy key will overwrite the original set.

Defrost Activation: A defrost cycle can be manually activated from the keypad by pressing the down button for more than 3 seconds. The defrost LED will illuminate, provided the defrost termination temperature (S5) is below the set value.

Continuous Cooling Demand Activation: The controller can be forced into continuous cooling mode by pressing the up button for more than 3 seconds. The cooling LED will illuminate. Pressing the up button again for more than 3 seconds stops the continuous cooling process.

Display of Data: During normal operation, the display shows the temperature measured by the S1 air sensor. Pressing the down button displays the current value of the defrost termination sensor. A blinking LED indicates that a relay is inhibited due to a time delay or an active alarm condition.

Maintenance Features

The EC1-233 is designed for robust operation, but proper installation and adherence to safety guidelines are essential for long-term reliability.

• Safety Instructions: Users must read installation instructions thoroughly to prevent device failure, system damage, or personal injury. The product is intended for use by individuals with appropriate knowledge and skills.
• Electrical Safety: Ensure that electrical ratings are not exceeded. The maximum current permitted through the common live terminal (pin 1) is 15 Amps. Exercise caution when removing the electrical cover to avoid electrical shock. All voltages must be disconnected from the system before installation.
• Environmental Conditions: The device should be operated within nominal temperature limits and in compliance with local electrical regulations for wiring.
• Sensor Cable Extension: Sensor cables can be extended if necessary, but the connection must be protected against water and dust to maintain accuracy and prevent damage.

The controller's design emphasizes reliability and ease of troubleshooting, with clear LED indications for various operational states, including cooling, defrost, and fan activity. Alarm codes provide specific information about detected issues, such as high/low temperature alarms or sensor errors, facilitating quick diagnosis and resolution.

Emerson EC1-233 Specifications