WURM DCC-BL Product information

Brand: WURM

Model: DCC-BL

Type: Product information

WURM DCC-BL is a rack and condenser controller with operating modes for compressors with or without frequency converters. This powerful device offers a wide range of capabilities to optimize the performance and efficiency of your refrigeration or air conditioning system.

With its advanced suction pressure or voltage control, the DCC-BL ensures precise temperature regulation in secondary circuits, enabling efficient cooling or heating. Additionally, it provides expansion valve control for heat exchangers and supports the integration of an X-tra module for enhanced functionality.

The DCC-BL's comprehensive operating modes allow it to seamlessly control different types of compressor racks. Its integrated monitoring system provides real-time feedback on compressor operation and faults, ensuring reliability and peace of mind.

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

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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

WURM DCC-BL Product information

Brand: WURM

Model: DCC-BL

Type: Product information

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WURM DCC-BL Product information

WURM DCC-BL Product information

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