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Rack and condenser controller with operating modes for compressors with FC
DCC-BL_V2.0.0_PI_2023-09_EN 1
Subject to technical changes
DCC-BL
1 DCC-BL
Rack and condenser controller with operating modes for compressors with FC
1.1 Front view
Fig. 1: Front view DCC-BL
1.2 Features
• Suction pressure control or voltage control
• Medium temperature control in secondary circuits (cooling/heating operation) using an X-tra
module
• Expansion valve control of a heat exchanger for secondary circuits using an X-tra module
• Different operating modes for controlling different types of compressor rack
• Monitoring of the compressor for operation feedback and faults using a DIN-BL
• Can be extended with an additional DCC-BL (master-slave)
• Integrated operating hours and switching cycles counter per compressor
• Compressor oscillation protection and compressor dwell monitoring
• Pump-out during compressor start and stop
• Emergency operation and manual compressor activation
• Rack downtime monitoring
• Optimised base load change and forced base load change
• Load shedding and Fastreturn via digital inputs
• Hot gas monitoring, suction gas monitoring and winter start function
• Evaporation temperature setpoint shift via digital input, Wurm CAN communication bus (C-BUS)
and enthalpy
• Medium temperature setpoint shift via digital input and C-BUS
• External setpoint default for evaporation and medium temperature via C-BUS
• Dynamic step increase and step decrease delay
• Automatic and manual activation of a brine pump using an X-tra module
• Monitoring for pump and flow faults
• Condensation pressure control (modulated/stepped)
• Condensation temperature setpoint shift by digital input and outside temperature
• Cyclical forced start-up for condenser fans
• Condenser fan emergency operation
• Support for higher baud rates on the C-BUS
• Can be locked to prevent unwanted parameter adjustment (SAC – Security Access Control)
• Plain text name for each parameter on the display, language selectable (DE/EN/FR)
• BLUELINE operation
• Direct connection of a CAN-USB to the service socket
• Connection to the Wurm system via C-BUS and FRIGODATA XP
Rack and condenser controller with operating modes for compressors with FC
2 DCC-BL_V2.0.0_PI_2023-09_EN
Subject to technical changes
DCC-BL
1.3 Safety instructions
Writing conventions
WARNING • Avoid the described hazard: otherwise, electric voltage represents a danger that could lead to
fatal or serious bodily injury.
CAUTION • Avoid the described hazard: otherwise, minor or intermediate physical injury or damage to
property will result.
For your safety
For safe operation and to avoid personal injury and equipment damage through operator error, always
read these instructions, become familiar with the device, and follow all safety instructions on the prod-
uct and in this document, as well as the safety guidelines of Wurm GmbH & Co. KG Elektronische
Systeme. Keep these instructions ready to hand for quick reference and pass them on with the device
if the product is sold.
Wurm GmbH & Co. KG Elektronische Systeme accepts no liability in the case of improper use or use
for purposes other than the intended purpose.
WARNING DANGER TO LIFE FROM ELECTRIC SHOCK AND/OR FIRE!
• Switch off the power to the entire plant when carrying out installation, wiring or disassembly work!
Otherwise, mains voltage and/or external voltage may still be present, even if the control voltage
is switched off! Always remove both power plugs (L and N).
• The wiring of the device must be carried out only by qualified electricians!
• Use the correct tools for any work!
• Check the entire wiring after connection!
• Observe the maximum loads for all connections!
• Never expose the device to moisture, for example due to condensation or cleaning agents.
• Stop operating the device if it is faulty or damaged and its safe operation is compromised!
• Do not open the device.
• Do not repair the device yourself! If the device requires repairs, send it in with an exact descrip-
tion of the fault!
CAUTION ELECTROMAGNETIC INTERFERENCE MAY CAUSE FAULTS!
• Always use shielded data cables and place them far away from power lines.
Target group This manual is intended for "service technician" personnel.
Intended use The DCC-BL is a rack and condenser controller with operating modes
for compressors with or without frequency converters.
Wurm Infocenter paperless info
Rack and condenser controller with operating modes for compressors with FC
DCC-BL_V2.0.0_PI_2023-09_EN 3
Subject to technical changes
DCC-BL
Validity of the documentation
Any versions not listed are special solutions for individual projects and are not described in detail in this document.
This document will automatically cease to be valid if a new technical description is issued.
Manufacturer: Wurm GmbH & Co. KG Elektronische Systeme, Morsbachtalstraße 30, D-42857 Remscheid
You can find more information on our website at www.wurm.de.
1.4 Connection diagram
Fig. 2: DCC-BL connection diagram
Version Date
V2.0.0 and higher 2023-09 Documentation status
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Item Designation Function
1C-BUS interface Data communication (H = CAN high, S = shield, L = CAN low, 0V = CAN-0V)
2Service socket For connecting a CAN-USB
3RS485 3-conductor interface with power supply 5V= and complete termination
4Output relays K 1...K 4 Compressor connection, depending on operating mode, floating contact, 230V~, 4(2)A
5Power supply L 230V~/50Hz
6X-tra interface Expansion module connection
7Power supply N Neutral conductor
8Digital inputs Inputs for non-floating: Multifunctional inputs (DI 1, DI 3, DI 4), Fastreturn (DI 2)
9Analogue outputs Uout 1 and
Uout 2
Uout 1: Modulating compressor connection
Uout 2: Fan control (direct or through ADC module)
10 Pressure sensors Suction pressure or condensation pressure
11 Sensor input S 2 or 0...10V
input
Outside temperature sensor, suction gas temperature sensor or hot gas temperature sen-
sor / output control in voltage control operating mode
12 Sensor input S 1 Outside temperature sensor, suction gas temperature sensor or hot gas temperature sen-
sor
13 Semicon. relay outputs SSR 1 Enable / control expansion valve
14 Semicon. relay outputs SSR 2 Enable / control pump
15 Data interface Control and power supply via FRIGOENTRY BL devices
16 Sensor inputs S 1...S 2 Supply flow/return flow temperature sensor
17 Sensor input p0 Medium temperature setpoint shift
18 Uout 1 Enable / control expansion valve
19 Uout 2 Enable / control pump
Rack and condenser controller with operating modes for compressors with FC
4 DCC-BL_V2.0.0_PI_2023-09_EN
Subject to technical changes
DCC-BL
1.5 Installing the device
This device is designed for top-hat rail installation. The housing has standard DIN 43880 dimensions
and is also suitable for operation in fuse boxes and distribution cabinets.
The device can be positioned immediately adjacent to another device without gaps.
WARNING DANGER TO LIFE FROM ELECTRIC SHOCK AND/OR FIRE!
• Switch off the power to the entire plant before installing. Otherwise, mains voltage and/or exter-
nal voltage may still be present, even if the control voltage is switched off. Always remove both
power plugs (L and N).
The entire plant must be free of voltage.
1. (A) Place the device with the leading edge at an acute angle to the top-hat rail.
2. (B) Push the device downwards onto the top-hat rail.
The device snaps into place with the fastening safety catch (a) on the top-hat rail.
You can now connect the device.
Fig. 3: Top-hat rail installation
1.6 Technical data
Power supply 230V~, +10% / -15%, max. 10VA
Display 1 x display with plain text display
2 x green LED, C-BUS data traffic (CAN Tx, CAN Rx)
C-BUS communication 3-conductor CAN bus interface with integrated power supply,
galvanically isolated, separate service socket
RS485 communication 3-conductor interface with power supply 5V= and complete
termination
Communication
Expansion module
Interface for connecting the X-tra module
Pressure sensors For p0 and pC (corresponds to 4...20mA):
• DAR 7 (-0,5...7bar)
• DAR 25 (0...25bar)
• DAR 40 (0...40bar)
• DAR 60 (0...60bar)
• DAR 120 (0...120bar)
• (0...160 bar)
Temperature sensor TRK277/7 PLUS, TRK277/G2, DGF
Control input 0...10V= (for output control in voltage control operating mode)
or alternatively temperature sensor
Digital inputs 4 x non-floating
Output relay 4 x normally open contacts, 230V~, 4(2)A,
Analogue outputs 2 x 0...10V=, non-floating, max. load 10mA
Real-time clock With power reserve
Monitoring system Monitoring of data memory and connected sensors
Dimensions (W x H x D) 106mm x 90mm x 58mm (DIN 43880)
Fastening Top-hat rail TH 35-15 or TH 35-7.5 (DIN EN 60715)
Ambient temperature Operation: 0...+55°C, storage: -25...+70°C
Weight About 320g
CE conformity - 2014/30/EU (EMC Directive)
- 2014/35/EU (Low Voltage Directive)
RoHS II
A
B
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