Grundfos CU 3 2 Series User manual

CU 3X2, CU 3X4
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
Other languages
http://net.grundfos.com/qr/i/96842987

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Table of contents
CU 3X2, CU 3X4
English (GB)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Български (BG)
Упътване за монтаж и експлоатация. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Čeština (CZ)
Montážní a provozní návod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Deutsch (DE)
Montage- und Betriebsanleitung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Dansk (DK)
Monterings- og driftsinstruktion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Eesti (EE)
Paigaldus- ja kasutusjuhend. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Español (ES)
Instrucciones de instalación y funcionamiento . . . . . . . . . . . . . . . . . . . . . . . . . 72
Suomi (FI)
Asennus- ja käyttöohjeet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Français (FR)
Notice d'installation et de fonctionnement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Ελληνικά (GR)
Οδηγίες εγκατάστασης και λειτουργίας . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Hrvatski (HR)
Montažne i pogonske upute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Magyar (HU)
Telepítési és üzemeltetési utasítás. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Italiano (IT)
Istruzioni di installazione e funzionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Lietuviškai (LT)
Įrengimo ir naudojimo instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Nederlands (NL)
Installatie- en bedieningsinstructies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Polski (PL)
Instrukcja montażu i eksploatacji . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Português (PT)
Instruções de instalação e funcionamento . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Română (RO)
Instrucţiuni de instalare şi utilizare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Table of contents
4
CU 3X2, CU 3X4
Srpski (RS)
Uputstvo za instalaciju i rad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Русский (RU)
Паспорт, Руководство по монтажу и эксплуатации . . . . . . . . . . . . . . . . . . 216
Svenska (SE)
Monterings- och driftsinstruktion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Slovensko (SI)
Navodila za montažo in obratovanje. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Slovenčina (SK)
Návod na montáž a prevádzku . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Türkçe (TR)
Montaj ve kullanım kılavuzu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
中文 (CN)
安装和使用说明书 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
日本語 (JP)
取扱説明書 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284
한국어 (KO)
설치 및 작동 지침 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295
ﺔﻳﺑﺭﻌﻟﺍ (AR)
ﻝﻳﻐﺷﺗﻟﺍ ﻭ ﺏﻳﻛﺭﺗﻟﺍ ﺕﺎﻣﻳﻠﻌﺗ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Declaration of conformity EAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321

English (GB)
5
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. Symbols used in this document
2. Product description
The CU 3X2 is a flexible control unit for control and
monitoring of up to six pumps. In the following
sections two variants will be described:
• CU 352
– Water supply and booster systems
– Heating and air-conditioning systems.
• CU 362
– Wastewater and draining applications.
In the following the two variants will be designated
CU 3X2.
1. Symbols used in this document 5
2. Product description 5
2.1 Indicator lights 6
2.2 Terminals 6
2.3 Potentially explosive environments 6
3. Identification 7
3.1 Type key 7
4. Installation 7
4.1 Location 8
4.2 Enclosure class 8
4.3 Terminals 8
4.4 Cables 8
4.5 Security 8
5. Mechanical installation 9
6. EMC-correct installation 9
6.1 Internal GENIbus connection 10
6.2 Fieldbus communication interface
modules 10
6.3 Fitting the CIM module 10
7. Startup 12
8. Technical data 12
9. Electrical data 12
9.1 Supply voltage 12
9.2 Power consumption 12
9.3 Circuit breaker 12
9.4 Backup fuse 12
9.5 Short-circuit protection 12
9.6 Digital inputs 12
9.7 Analog inputs 12
9.8 Digital outputs (relay outputs) 12
9.9 Conductors 12
9.10 USB port 12
9.11 Battery backup (UPS) 13
9.12 Terminal groups 13
10. Overview of inputs and outputs 14
11. Maintenance 15
12. Service 15
13. Replacing the CU 3X2 15
13.1 Replacing the CIM module 15
14. Dimensions 15
15. Disposal 15
Warning
Prior to installation, read these installation
and operating instructions. Installation and
operation must comply with local
regulations and accepted codes of good
practice.
Warning
If these safety instructions are not
observed, it may result in personal injury.
Warning
If these instructions are not observed, it
may lead to electric shock with consequent
risk of serious personal injury or death.
Caution
If these safety instructions are not
observed, it may result in malfunction or
damage to the equipment.
Note
Notes or instructions that make the job
easier and ensure safe operation.

English (GB)
6
Fig. 1 Example of CU 3X2
* Some help texts apply to the entire display, other
texts to the individual lines of the display.
2.1 Indicator lights
The CU 3X2 has one green and one red indicator
light.
The green indicator light is on when the power
supply has been switched on.
The red indicator light is on when the system is in
alarm mode.
2.2 Terminals
Fig. 2 Back of the CU 3X2
For further information, see section 9.12 Terminal
groups.
2.3 Potentially explosive environments
The CU 3X2 must not be installed in explosive
environments, but may be used together with
Grundfos pumps approved for installation in
potentially explosive environments.
Warning
If the CU 3X2 is used in a manner not
specified by the manufacturer, the
protection provided by the CU 3X2 may be
impaired.
TM05 3044 0912
Pos. Description
1 LCD display
2Changes to next column in menu
structure.
3 Changes to help text.*
4 Goes up in lists.
5 Goes down in lists.
6Increases the value of a selected
parameter.
7Reduces the value of a selected
parameter.
8 Goes one display back.
9 Goes back to menu "Status".
10 Saves a value.
11 Green indicator light (operation)
12 Red indicator light (alarm)
13 Changes the brightness of the
display.
1
11
10
9
8
7
6
4
5
3
2
1213
CU 362
TM05 3181 0912
Pos. Description
1 Nameplate
2 Terminals for digital output relays
3 Terminals for analog inputs
4 Service connection
5 Ethernet (RJ45)
6 Voltage indicator
7 Terminals for digital inputs
8 Terminals for backup battery
9 Terminals for CIM module (optional)
10 Cable clamps for GENIbus connections
11 Internal GENIbus connection
12 Terminal for power supply
13 Label for backup battery
14 USB port
0V 12V
1
13
2
3
4
5
6 7 8 9 10 11 12
14

English (GB)
7
3. Identification
The CU 3X2 can be identified by means of the
nameplate on the back. See fig. 3.
Fig. 3 Example of nameplate
The CU 3X2 has a label for the backup battery.
See fig. 4.
Fig. 4 Label for backup battery
Fig. 5 Protective earth terminal
3.1 Type key
4. Installation
The CU 3X2 is only intended for use in control
panels.
Before installation, check the following:
• Does the CU 3X2 correspond to the one
ordered?
• Is it suitable for the power supply available at the
installation site?
• Has it been damaged during transportation?
TM05 3240 1012
Pos. Description
1 Type designation
2 Product number and version number
3 Serial number
4 Production code (year and week)
5 Rated voltage, frequency and power
TM04 2367 2408 TM00 5827 3408
Code Example CU 3 X 2
CU Control unit
3X Controller series
2 Model number
Type
Made in Thailand
96161750
Product No.
U
N
Serial No.
P
.c.
!
OPEN TYPE PROCESS
CONTROL EQUIPMENT
100-240 VAC 50/60Hz - Max. 22W
CU 362
98146953 - VO1
12
4
5
3
0536
1228
30 XP
12V dc
Battery powered
0V 12V
96801950
Warning
Switch off the power supply before making
connections. Make sure that it cannot be
accidentally switched on.
Warning
The electrical installation should be carried
out by an authorised person in accordance
with local regulations.
Warning
Observe local regulations for safety, health
and environment.
Warning
The terminals L and N as well as 70 to 75
may be connected to dangerous contact
voltage. External control voltage from
other groups may occur.
Warning
All wires to units outside the control panel
must be of the type H05VV-F according to
CENELEC HD21 (to avoid injury from
touching wires).
USA and Canada:
Field wiring installation shall comply with
National Electrical Code (NEC) and/or
Canadian Electrical Code.
Warning
The installation must incorporate a circuit
breaker in order to switch off the mains
supply. It must be close to the CU 3X2 and
easily accessible for the operator. It must
be marked as circuit breaker for the
CU 3X2. The circuit breaker must be
according to IEC 60947-1 and
IEC 60947-3.

English (GB)
8
4.1 Location
The CU 3X2 is designed for installation in the front of
a control panel or a separate cabinet.
For outdoor installation the CU 3X2 must be
mounted in a control cabinet with an enclosure class
of minimum IPX4.
4.2 Enclosure class
The CU 3X2 is IP55 when mounted in the front of an
IPX4 enclosure. The cabinet must be of a
flame-retardant material.
USA and Canada
The CU 3X2 is type 3R when mounted in the front
of a cabinet with type rating 1, 2, 3, 3R, 5, 12, 12K
or 13.
4.3 Terminals
All terminals are suitable for conductors of 0.5 to
2.5 mm2 or AWG 20-13.
4.4 Cables
Cables must be rated min. 70 °C.
4.5 Security
Grundfos connected products must be behind a
firewall or connected to a private network.
If a firewall or private network is not in place, the
Grundfos product may be subject to a cyber-security
risk and becomes vulnerable to an attack or
compromise.
Follow the highly recommended configuration
requirements below. If in doubt, consult an IT
Infrastructure Specialist.
4.5.1 CU 352/354/362/372/3X2 DH
CU 3xx is a traditional network connected device and
must be placed on a private network behind a
firewall. It must not be connected directly to the
Internet. Also, no TCP/IP ports must be forwarded to
the product. If you need remote access to the device,
you must use technologies such as Virtual Private
Networks (VPNs) to ensure a secured connection.
Consider contacting an IT Infrastructure Specialist to
establish such a solution.
Fig. 6 Secure connectivity for
CU 352/354/362/372/3X2 DH
Warning
Short-circuit protection
The installation must incorporate external
fuses.
EU/IEC:
Use fuses that comply with IEC 60127.
Rated maximum 10 A, minimum 250 VAC
in both line and in neutral when connecting
the controller to the power source.
USA and Canada (branch circuit
protection):
Use a UL/CSA-listed non-time delay,
class-rated Branch Circuit Fuse (such as
class RK5) rated maximum 10 A, minimum
250 VAC in both line and in neutral when
connecting the controller to the power
source.
Warning
The terminals are only separated with
basic insulation. Therefore, do not connect
a PELV circuit to a terminal adjacent to a
terminal connected to live voltage.
PELV circuits and live wires must be
separated with double or reinforced
insulation.
TM07 4228 1119
Grundfos
device Firewall
Internet

English (GB)
9
5. Mechanical installation
Fasten the CU 3X2 with the four screws, M5 x 10,
supplied with the unit (pos. 1).
Maximum torque: 1.4 Nm.
Dimensions of the CU 3X2, see section
14. Dimensions.
Fig. 7 Mounting in panel front (standard)
Connect the earth terminal (between the cable
clamps) on the CU 3X2 to the mounting frame
(pos. 2, fig. 7). See fig. 8.
Fig. 8 Earth connection
6. EMC-correct installation
The CU 3X2 is normally mounted in a panel which
also contains an IO 351 module, contactors and
other power equipment. The panel can also contain
other Grundfos modules and frequency converters.
In order to ensure faultless operation, it is very
important to install the electronic modules in an
EMC-correct way:
• Ensure a sufficient earth connection between the
CU 3X2 and the frame. See fig. 8.
• Use screened cables for GENIbus. Connect the
screen to the cable clamp of the CU 3X2 in front
of the terminals A1, Y1 and B1. See fig. 9.
Also use screened cable for the CIM module.
Fig. 9 Screen fixed with cable clamp
• Signal conductors for digital and analog inputs
and outputs should be screened, i.e. run the
screen all the way to the CU 3X2 and connect it
to frame with for instance a cable clamp.
Do not twist screen ends to avoid pig tails, as this
will destroy the screen effect at high frequencies.
Use cable clamps instead.
TM03 1301 4105
Note
In order to achieve enclosure class IP55,
the CU 3X2 must be mounted in a panel or
cabinet.
TM04 2066 1908
Min. 1.5 mm
Max. 3 mm
TM04 2065 1908
Note
Any isolating plastic tape between screen
and sheath must be removed before
mounting the cable in the cable clamp.

English (GB)
10
6.1 Internal GENIbus connection
Internal communication is established via GENIbus.
Fig. 10 GENIbus connection
The module type and the number of modules depend on the application software.
6.2 Fieldbus communication interface
modules
The CU 3X2 can be connected to an external
communication network via an add-on CIM module.
CIM: Communication Interface Module.
The CIM modules must be ordered separately.
Connect the CIM module as described in the
installation and operating instructions supplied with
the module.
6.3 Fitting the CIM module
The CIM module must be fitted by an authorised
person.
1. Remove the screw in the back cover of the
CU 3X2. See fig. 11.
Fig. 11 Removing the screw that holds the back
cover
TM05 1917 3911
Unit n
Unit n+1
CU 3X2
Warning
Switch off the power supply to the CU 3X2
before fitting the CIM module.
Warning
Electrostatic discharge (ESD) must be
avoided when fitting the CIM module, for
instance by wearing an antistatic wrist
strap as shown in fig. 13.
TM04 2402 2508