WURM HCO2 is a master module for process controlling CO2 refrigerant plants with two-stage pressure reduction. It features high and medium-pressure control, gas cooling fan control, and additional control circuits for load shedding, desuperheater, post-injection, refrigerant monitoring, heat recovery, pressure monitoring, and heat quantity calculation. The device requires connection of 2 or 3 field modules of the FKVxxx type, depending on the selected scope of functions.
WURM HCO2 is a master module for process controlling CO2 refrigerant plants with two-stage pressure reduction. It features high and medium-pressure control, gas cooling fan control, and additional control circuits for load shedding, desuperheater, post-injection, refrigerant monitoring, heat recovery, pressure monitoring, and heat quantity calculation. The device requires connection of 2 or 3 field modules of the FKVxxx type, depending on the selected scope of functions.
HCO2
HCO2_V2.7_PI_2016-03_EN.fm 1
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FRIGOLINK
1 HCO2
Master module for process control of CO2 refrigeration systems with two-stage pressure
reduction
1.1 Front view
Abb. 1: HCO2 - front view
1.2 Features
• High and medium pressure control
• Gas cooling fan control
• Additional control circuits for:
- Load shedding
- Desuperheater
- Post-injection
- Refrigerant monitoring
- Heat recovery including heat quantity calculation and process evaluation
- Pressure monitoring
• Connection of 2 or 3 field modules of the FKVxxx type required, depending on the selected scope of functions
• Integrated relay outputs
• Graphical display with backlighting and 8 operating keys
• Bus connection by patch cable
• Fastening in the installation frame, or individual mounting without frame
• Connection to the Wurm system over a communication bus (CAN bus) and Frigodata XP
• High safety thanks to galvanically isolated field bus (CAN bus) to connect the field modules
HCO2
2HCO2_V2.7_PI_2016-03_EN.fm
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FRIGOLINK
1.3 Safety instructions
Writing conventions
Caution!
CAUTION!
• Avoid the described hazard: Otherwise minor or medium bodily injury or property damage will
result.
Warning
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 operational error, always read these in-
structions, become familiar with the device, and implement all of the safety instructions on the product and in these instruc-
tions 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 when 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
WARNING! LEBENSGEFAHR DURCH STROMSCHLAG!
• Switch off the power to the entire system when installing, wiring or removing! Otherwise a mains
voltage may still be present even if the control voltage is switched off!
• The wiring of the device should be carried out only by a qualified electrician!
• Use only the correct tools for all work!
• Check all wiring after connection!
• Never expose the device to moisture, for example due to condensation or cleaning agents!
• Take the device out of operation if there is a fault or damage that could compromise safe opera-
tion!
Caution!
CAUTION! DANGER OF FIRE DUE TO OVERLOAD OF THE RELAY CONTACTS!
• Take note of the maximum loads on all connections!
CAUTION! FAULTS ARE CAUSED BY ELECTROMAGNETIC INTERFERENCE!
• Use only shielded data lines and place them far away from power lines!
CAUTION! GERÄTESCHADEN DURCH UNSACHGEMÄßE HANDHABUNG!
• Do not open the device!
• Do not repair the device by yourself! If required, send it in for repair with an exact description of
the fault!
Target group These instructions are intended for "service technician" personnel.
Use as intended The HCO2 is a master module for process controlling CO2 refrigerant plants with two-stage
pressure reduction.
HCO2
HCO2_V2.7_PI_2016-03_EN.fm 3
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FRIGOLINK
Software revisions and validity of documentation
Any software versions not listed are special solutions for individual projects and are not documented in this description in detail. This doc-
ument 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 further information on the Internet page www.wurm.de
1.4 Mounting
Warning
WARNING! DANGER OF DEATH FROM ELECTRIC SHOCK!
• Switch off the power to the entire system before installing! Otherwise, external voltage can be
present even when control voltage is shut off.
Installation in the mounting frame MGR131/141
1. Push the device in the mounting frame to the stop until it locks between the spring clips.
Abb. 2: HCO2 - installation in MGR131/141
NOTE!
• Please observe the product information for the MGR131/141 mounting frame.
Individual installation with screw clamps of the ZEM type
1. Insert the device up to the stop in a section of a switching cabinet door.
2. Fix the device with screw clamps of the ZEM type to the switching cabinet door.
Abb. 3: HCO2 - installation with ZEM and installation section
Software version Functional upgrade Page
V2.7 - 2016-03 Basis der documentation
9
S
S
S
9
S
S
S
102
106
HCO2
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1.5 Circuit diagram
Abb. 4: HCO2 - circuit diagram
1.5.1 Wiring and connection of several master modules
Abb. 5: HCO2 - wiring and connection of several master modules
1.6 Technical data
Supply voltage 230V~, +10% / -15%, 50Hz, max. 13VA
Displays Graphical display with backlighting
4 x yellow LED, menu selection
1 x red LED, flashing in case of fault
1 x yellow LED for operating status of communication bus
1 x yellow LED for operating status of field bus
Communication bus 3-wire CAN bus interface, shielded, galvanically isolated
Push-in terminals 2.5mm² and RJ45 socket, switchable terminating resistor
Communication field bus 3-wire CAN bus interface, shielded, galvanically isolated
Push-in terminals 2.5mm² and RJ45 socket, switchable terminating resistor
Digital inputs 6 x 24V=, self-powered, approx. 5mA per input, push-in terminals, 2.5mm²
Digital outputs 8 x normally open contact with common supply, 1A,
rated voltage 230V~, push-in terminals 2.5mm²
Dimensions (B x H x T) 109 x 109 x 92mm
Housing Plastic, foil
Mounting In MGR installation frame, individual installation with ZEM
Ambient temperature Operation: 0...+50°C, storage: -25...+70°C
Weight About 650g
CE conformity EU conformity as defined in
- 2014/30/EU (EMC Directive)
- 2014/35/EU (Low Voltage Directive)
RoHS II
Valid from Version 2.7
11
12
13
14
15
16
17
27
26
25
24
23
22
21
29
28
G
L
S
C-BUS
H
F-BUS
H
S
L
G
F-BUS
C-BUS
99
98
OUTPUT INPUT
71
72
73
74
81
82
83
84
L
NAccess barrier
WRG 1 request
WRG 2 request
MP too low
Post-injection NC
Pressure raising request
Fault in GC fan 1
Fault in GC fan 2 / valves closed
PRIO 1/2
PRIO 1/2
Te release
11 11 1112 1212
24V 24V 24V
Access
barrier
Access
barrier
Access
barrier
-
1
-
2
-
3
-
4
WURM HCO2 is a master module for process controlling CO2 refrigerant plants with two-stage pressure reduction. It features high and medium-pressure control, gas cooling fan control, and additional control circuits for load shedding, desuperheater, post-injection, refrigerant monitoring, heat recovery, pressure monitoring, and heat quantity calculation. The device requires connection of 2 or 3 field modules of the FKVxxx type, depending on the selected scope of functions.
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