WURM CRC-XP User manual

Cold location controller for conventional plants, up to 4 control circuits (evaporator)
CRC-XP_V2.92_PI_2019-03_EN 1
Subject to technical modifications
CRC-XP
1 CRC-XP
Cold location controller for conventional plants, up to 4 control circuits (evaporator)
Fig. 1: Front view
1.1 Features
• Control functions for 4 control circuits/evaporators
• Suitable for all cold locations, such as cold rooms and refrigeration units
• Basic functional sequences and parameters preprogrammed through selection of cold location
type
• Operating modes for three-point control
• 2nd setpoint by digital input
• Different weightings selectable for 2 control sensors in day and night operation
• Intelligent fan control
• Thermal fan control and draining time after defrosting
• Suitable for electric, forced air, hot gas and cool gas defrosting
• Defrost control by real-time clock with power reserve
• Simple defrost synchronisation of multiple controllers (master-slave)
• For 8 defrost times, daily or only every xth day. Day
• Plug-in screw terminals
• Large data memory for temperature list
• Direct connection of a CAN-USB to the service socket
• Connection to the Wurm system through a Wurm CAN communication bus (C-BUS) and
FRIGODATA XP

Cold location controller for conventional plants, up to 4 control circuits (evaporator)
2CRC-XP_V2.92_PI_2019-03_EN
Subject to technical modifications
CRC-XP
1.2 Safety instructions
Writing conventions
CAUTION
• Avoid the described hazard, otherwise there is risk of minor or medium bodily injury or property
damage.
WARNING
• Avoid the described hazard: Otherwise there is danger from electric voltage that can lead to
death or serious bodily injury.
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 case of
improper use or use for 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 removal work.
Otherwise a 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).
• Only qualified electricians are permitted to wire the device.
• Use only the correct tools for all work.
• Check all wiring after connection.
• Take note of the maximum loads on all connections.
• Never expose the device to moisture, for example due to condensation or cleaning agents!
• Take the device out of operation if it is faulty or damaged and is therefore compromising safe
operation.
• 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 CAN 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 CRC-XP is a cold location controller for conventional plants with up
to 4 control circuits (evaporators).

Cold location controller for conventional plants, up to 4 control circuits (evaporator)
CRC-XP_V2.92_PI_2019-03_EN 3
Subject to technical modifications
CRC-XP
Software revision and validity of documentation
Any software versions not listed are special solutions for individual projects and are not described in detail in this
document. This document automatically ceases 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.
1.3 Circuit diagram
Fig. 2: Circuit diagram
1.4 Installing and connecting
The module is designed for top-hat rail installation. The housing is a standard size and is also suitable
for installation in fuse boxes or distribution switch boxes. Modules can be positioned side by side with-
out 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).
• Only qualified electricians are permitted to wire the device.
• Take note of the maximum loads on all connections.
.
Software version
V2.92 - 2019-03 Documentation status
CRC - XP
-+
12 13 14 15 16 17 18 11 22 23 24 25 26 27 28 29
21
RxD
TxD
38 37 36 35 34 33 32 31 39
54321
12 13 14 15 16 17 18 11 22 23 24 25 26 27 28 29
21
RxD
TxD
38 37 36 35 34 33 32 31 39
54321
0V L H n.c.
L
K1
K2
K3
K4
n.c.
F1
F2
F3
F4
N
E1
E2
E3
E4
GND
Sync.
setpoint 3
differential 3
act. value 4
differential 4
operating mode
/ version
setpoint 4
act. value 1
setpoint 1
differential 1
setpoint 2
differential 2
alarm priority
address
menu
act. value 2
act. value 3
Service
LEDs
C-BUS
230V~
50/60Hz
C-BUS interface Output relays
Temperature sensors Digital
inputs
Defrost
sync.

Cold location controller for conventional plants, up to 4 control circuits (evaporator)
4CRC-XP_V2.92_PI_2019-03_EN
Subject to technical modifications
CRC-XP
Fig. 3: Dimensions
For wiring of the data lines, we recommend the use of standard telephone lines 2x2x0.8ø. up to
lengths of 100m. The shielding must be grounded in the control cabinet. For cable lengths from 100m
to 400m, shielded lines with braided sheathing should be used.
Sensor extension
For sensor extensions, it is recommended that sheathed cable be laid.
1.5 Technical data
NOTICE
• You can find more information about the device in the Wurm Infocenter.
Cable length Cross section
up to 100m 0.75mm²
up to 400m 1.5mm²
Power supply 230V~, +10% / -15%, approx. 5VA
Temperature sensor 4 x TRK277, T3000, T2015, DGF, K243, TF 201 / TF 231
Digital inputs 4 x potential-free
Output relay 4 x relay 230V~, normally open contacts, 230V~, 4(2)A
Temperature control Thermostat method
Defrost Forced air, electric, hot gas, cold gas
Central unit Single-chip microcomputer, data memory and quartz clock with
5000h power reserve
Monitoring system Monitoring of connected sensors, self-monitoring of data mem-
ory and microcomputer
Communication 3-wire CAN bus interface with integrated power supply, galvani-
cally isolated, service socket
Dimensions (WxHxD) 106 x 90 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 Approx. 450g
CE conformity - 2014/30/EU (EMC Directive)
- 2014/35/EU (Low Voltage Directive)
EAC conformity - TR CU 004/2011
- TR CU 020/2011
RoHS II
Valid from Version 2.92
53
106
58
90