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Related Manuals for Emerson ECB-D20
Summary of Contents for Emerson ECB-D20
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Page 1: Ecb-D20 Refrigeration Control System For Display Cabinets
Technical Information Revision: Feb. 2019 OEM Solutions Development & Sales ECB-D20 DISPLAY CABINETS REFRIGERATION CONTROL SYSTEM FOR Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 1/42... -
Page 2: Table Of Contents
Defrost synchronization ........................38 Alarms ..............................39 Hardware alarms ..........................40 Software alarms ..........................40 Critical alarms ..........................41 Technical data ............................. 42 Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 2/42... - Page 3 Figure 26 Hotgas defrost sequence with / without 4way-Valve switching ............34 Figure 27: Display unit ECD-D05/06 ....................... 34 Figure 28: Defrost Phases ..........................37 Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 3/42...
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Page 4: Safety Notes
The cabinet control system can be tested using the Modbus interface. For more information, please consult the Modbus documentation. ▪ Start the system and check the operating conditions. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 4/42... -
Page 5: Introduction
Technical Information Introduction The ECB-D20 controller is designed for display cabinets with scroll compressors and heat recovery by air or water. The cabinet control system can be used for evaporator control purposes using an electronic unipolar stepper motor valve or a thermostatic valve in conjunction with a solenoid valve. When operating multiple refrigeration units, the automatic defrost synchronization function can be handled using a hardware link or an external monitoring system. -
Page 6: Assembly And Installation
2 = open Stocko: 3 = GND RAST2.5 3-pin socket connectors Equipment temperature 1 = 3.3V DC 2 = open 3 = GND Stocko: Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 6/42... -
Page 7: Table 1: Connector Assignment
8 = Modbus GND J3 / J4 Header rows Optional communication interface J7 / J8 Header rows Optional output interface (EXM, relay) Table 1: Connector assignment Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 7/42... -
Page 8: Relay
4.1.2 Relay One LED is positioned in front of each relay to indicate the relay status. The LED illuminates when a relay is energized. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 8/42... -
Page 9: High And Low Pressure Switches
Modbus communication, activity is indicated by the green LED next to the micro controller. A receiving data status is indicated by a flashing LED. The principle setup is shown in the next picture: Figure 3 Modbus wiring Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 9/42... -
Page 10: Bus Termination / Polarization
RJ 45 terminals. In some cases (disturbances on the bus), it could be also helpful to polarize the bus with two additional jumpers at one controller on the bus. Figure 5 Jumpers Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 10/42... -
Page 11: Figure 6 Bus Termination
Technical Information A principle setup where to place the termination jumper is shown in Figure 5: Figure 6 Bus termination Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 11/42... -
Page 12: Inputs/Outputs
Additionally, the safety chain is controlled by a watchdog timer. In case of an internal fault of the microprocessor the safety relay is switched of automatically. Figure 7: Safety Concept Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 12/42... -
Page 13: Sensor Inputs
S2: Air in sensor S3: Air out sensor S4: Fin sensor/defrost sensor S5: Refrigeration unit temperature S6: Discharge temperature Figure 8: Sensor positions Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 13/42... -
Page 14: Electronic Expansion Valve (Exv)
Technical Information 4.3.6 Electronic Expansion Valve (EXV) The controller module has an output for a unipolar electronic expansion valve (Emerson EXM/L) which is controlled by a stepper motor. Figure 9: EXV Connection white orange yellow brown blue Figure 10: EXM/EXL-246 Windings Proprietary and confidential –... -
Page 15: Communication / Modbus Address
1 2 3 4 5 6 7 8 Modbus address 1 to 63 0 is not permitted Table 3: Modbus DIP switches Modbus Modbus Address Address Table 4: Modbus Addresses Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 15/42... -
Page 16: Digital Inputs
All “Software alarms” like “high temperature” are cleared by entering the standby mode and not evaluated in this state. Only “hardware alarms” will be indicated. The cabinet is not reacting on the day/night input. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 16/42... -
Page 17: External Devices (Modbus Master)
The current implemented devices are: • Variable speed drive, Emerson ED3015A • Soft starter, Carlo Gavazzi RSBT4025EVC • EC Fan, EBM ESM Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 17/42... -
Page 18: Emerson Ed3 Drive
4.6.1.1 Emerson ED3 Drive One Emerson ED3 drive can be connected to the Modbus master interface. The default Modbus address is 45, which is the factory default address of the drive. If required this address can be changed in the configuration of the controller and the drive (separate description file). -
Page 19: Functions And Parameters
Selection of measuring sensors for controlling the air temperature. Air inlet or air outlet during daytime operation. Control temperature = air inlet + ([air outlet - air inlet] x Mean value / 100) Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 19/42... -
Page 20: Figure 15 Fix Speed Control
The hybrid fan is activated when the setpoint value + dead band is exceeded. This function is only active if the hybrid fan is configured for condensing pressure control. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 20/42... - Page 21 Relative alarm threshold to control temperature setpoint or 3. If the control temperature rises above setpoint + this value an alarm is triggered. + Parameter(17) threshold set-point Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 21/42...
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Page 22: Figure 17: Shift Of Defrost Interval's By Modbus Address
After starting a defrost cycle (either by a timer or via communication), the interval is re- set. Figure 17: Shift of Defrost Interval’s by ModBus Address Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 22/42... - Page 23 The defrost on time 4 can be enabled by using this parameter. Defrost time 4 Defrost time 4 ([h x 60] + min) x 20 + (sec / 3) Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 23/42...
- Page 24 2 = Cabinet temperature display / Exx in case of error / -d- when defrost Available compressors Provides an option to deactivate individual compressors when using a compressor pack controller. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 24/42...
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Page 25: Figure 18: Demand Defrost Detection
Time in seconds. The detection of the best cooling capability after a defrost termination is delayed by the time configured in this parameter. Demand defrost Delta lambda Filter factor to lowpass the temperature difference. Refrigerant Selection of the used refrigerant. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 25/42... -
Page 26: Figure 19: Deadband Control
This function is only active if an electronic expansion valve is used. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 26/42... -
Page 27: Table 5: Defrost Modes
An instant restart of the fans after an electrical or hot-gas defrost is delayed by this parameter, so no hot air is blown into the cabinet. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 27/42... -
Page 28: Figure 20: Synchronized Defrost
Figure 21: Pack Defrost Compressor Delay at Hot Gas Defrost If a hot-gas 4-way defrost is configured the adding of additional compressors in defrost mode could be delayed by this parameter. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 28/42... -
Page 29: Figure 22: Pack Cycle Compressor Delay At Thermostat Emergency Operation
When this time has elapsed a stop of cooling is forced. Compressor minimum on time The compressor could only be switched off after a minimum period. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 29/42... - Page 30 Drive) the temperature / capacity control is done by a PI controller Capacity control Kp Capacity control Ki). This parameter defines the integral part. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 30/42...
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Page 31: Table 6: Relay Functions
Maximum acceleration rate of the drive. After the start-up process of the compressor the Drive will use this acceleration rate to increase the speed of the compressor up to the speed configured in Parameter 85 Variable speed startup speed. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 31/42... - Page 32 If the door is open the cooling is stopped immediately. In case the door stays open for a period longer than the time defined by this parameter an Alarm is triggered. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 32/42...
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Page 33: Figure 25 Pack One-Shot Mode
Compressor speed during defrost startup time (see Figure 26 Hotgas defrost sequence with / without 4way- Valve switching). Hotgas-Defrost startup duration Duration of the defrost startup time (see Figure 26 Hotgas defrost sequence with / without 4way-Valve switching). Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 33/42... -
Page 34: Display Unit Functions (Ecd-D05/06)
The corresponding digital input (DI 1 or DI 2) for the fans only mode can be set by this parameter. Display unit functions (ECD-D05/06) Lighting (daytime operation) Nighttime operation Refrigeration operation Evaporator fan Defrost Alarm Figure 27: Display unit ECD-D05/06 Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 34/42... -
Page 35: Limited Configuration Parameters Using Display Unit
If there is no user activity within 60 s, the controller exits the configuration settings menu and cancels any values that have been changed. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 35/42... -
Page 36: Defrost Request Using Keyboard
30 “Day defrost termination time” (timeout). The corresponding timeout is defined according to the 31 “Night defrost termination time” respectively parameter. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 36/42... -
Page 37: Defrost Process
The read-only "defrost running" variable is set to "1" in the event of a defrost request and re-set to "0" after the end of the synchronization phase. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 37/42... -
Page 38: Defrost Start Using Real-Time Clock
(Reg. 545) the defrost is terminated and cooling is restarted. As a fall back strategy a maximum waiting time for this command is respected (Parameter 82 Sync. Delay after defrost). Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 38/42... -
Page 39: Alarms
Configuration alarm Cooling stop alarm Software 0x4000 Envelope alarm Cooling stop alarm Software 0x8000 Compressor alarm Cooling stop alarm Table 8: Alarm Codes Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 39/42... -
Page 40: Hardware Alarms
Is triggered when the cabinet temperature (24 “High cabinet temperature” alarm exceeds the threshold threshold) for a certain amount of (25 “Cabinet temperature” alarm time. delay). Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 40/42... -
Page 41: Critical Alarms
If the alarm was triggered during compressor operation, the system only returns back to normal controls after an “Alarm pause“ delay time. Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 41/42... -
Page 42: Technical Data
24V DC, max. 260 mA short-circuit proof Communication Modbus Slave RTU, electrically isolated Modbus Master RTU, electrically isolated Table 9: Technical Data VDE certificate No. 40035930 Proprietary and confidential – Do not copy or distribute without permission from Emerson Climate Technologies GmbH 42/42...