Endress+Hauser CleanFit CUA 451 User manual

Products Solutions Services
Operating Instructions
Cleanfit CUA451
Retractable process assembly
BA00369C/07/EN/14.18
71429362
2018-11-30

Cleanfit CUA451 Table of contents
Endress+Hauser 3
Table of contents
1 About this document ................ 4
1.1 Warnings ............................ 4
1.2 Symbols .............................. 4
1.3 Symbols on the device ................... 4
2 Basic safety instructions ............ 5
2.1 Requirements for the personnel ............ 5
2.2 Designated use ........................ 5
2.3 Workplace safety ....................... 5
2.4 Operational safety ...................... 6
3 Product description ................. 7
3.1 Product design ......................... 7
4 Incoming acceptance and product
identification ....................... 9
4.1 Incoming acceptance .................... 9
4.2 Product identification .................... 9
4.3 Scope of delivery ...................... 10
4.4 Certificates and approvals ............... 10
5 Installation ....................... 11
5.1 Installation conditions .................. 11
5.2 Mounting the assembly ................. 17
5.3 Post-installation check .................. 26
6 Commissioning .................... 27
6.1 Preparatory steps ...................... 27
7 Operation ......................... 28
7.1 Adapting the device to the process
conditions ........................... 28
8 Maintenance ...................... 29
8.1 Maintenance tasks .................... 29
9 Repair ............................ 34
9.1 General information ................... 34
9.2 Spare parts .......................... 35
9.3 Return ............................. 36
9.4 Disposal ............................ 36
10 Accessories ....................... 37
10.1 Device-specific accessories ............... 37
10.2 Service-specific accessories ............... 39
11 Technical data .................... 40
11.1 Environment ......................... 40
11.2 Process ............................. 40
11.3 Mechanical construction ................ 40
Index .................................. 42

About this document Cleanfit CUA451
4 Endress+Hauser
1 About this document
1.1 Warnings
Structure of information Meaning
LDANGER
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation will result in a fatal or serious
injury.
LWARNING
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation can result in a fatal or serious
injury.
LCAUTION
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid this situation can result in minor or more serious injuries.
NOTICE
Cause/situation
If necessary, Consequences of
non-compliance (if applicable)
‣Action/note
This symbol alerts you to situations which may result in damage to
property.
1.2 Symbols
Symbol Meaning
Additional information, tips
Permitted or recommended
Not permitted or not recommended
Reference to device documentation
Reference to page
Reference to graphic
 Result of a step
1.3 Symbols on the device
Symbol Meaning
Reference to device documentation

Cleanfit CUA451 Basic safety instructions
Endress+Hauser 5
2 Basic safety instructions
2.1 Requirements for the personnel
• Installation, commissioning, operation and maintenance of the measuring system may
be carried out only by specially trained technical personnel.
• The technical personnel must be authorized by the plant operator to carry out the
specified activities.
• The electrical connection may be performed only by an electrical technician.
• The technical personnel must have read and understood these Operating Instructions
and must follow the instructions contained therein.
• Faults at the measuring point may only be rectified by authorized and specially trained
personnel.
Repairs not described in the Operating Instructions provided must be carried out only
directly at the manufacturer's site or by the service organization.
2.2 Designated use
The manually operated Cleanfit CUA451 retractable assembly is designed for the
installation of turbidity sensors in vessels and pipelines.
Thanks to its design, it can be operated in pressurized systems.
The assembly is designed exclusively for use in liquid media.
Use of the device for any purpose other than that described, poses a threat to the safety of
people and of the entire measuring system and is therefore not permitted.
The manufacturer is not liable for damage caused by improper or non-designated use.
2.3 Workplace safety
As the user, you are responsible for complying with the following safety conditions:
• Installation guidelines
• Local standards and regulations
Electromagnetic compatibility
• The product has been tested for electromagnetic compatibility in accordance with the
applicable European standards for industrial applications.
• The electromagnetic compatibility indicated applies only to a product that has been
connected in accordance with these Operating Instructions.

Basic safety instructions Cleanfit CUA451
6 Endress+Hauser
2.4 Operational safety
Before commissioning the entire measuring point:
1. Verify that all connections are correct.
2. Ensure that electrical cables and hose connections are undamaged.
3. Do not operate damaged products, and protect them against unintentional operation.
4. Label damaged products as defective.
During operation:
‣If faults cannot be rectified:
products must be taken out of service and protected against unintentional operation.
LCAUTION
Cleaning not switched off during calibration or maintenance activities
Risk of injury due to medium or cleaning agent!
‣If a cleaning system is connected, switch it off before removing a sensor from the
medium.
‣If you wish to check the cleaning function and have therefore not switched off the
cleaning system, wear protective clothing, goggles and gloves or take other appropriate
measures.

Cleanfit CUA451 Product description
Endress+Hauser 7
3 Product description
3.1 Product design
1
2
3
4
5
6
8
9
10
7
A0038438
 1 Assembly in operational state (ball valve open)
1 Bracket for sensor holder
2 Sensor holder
3 Bayonet lock
4 Securing screws
5 Grease nipple
6 Ball valve for venting or rinse connection
7 Process connection
8 Retraction pipe
9 Hand lever for opening/closing the ball valve
10 Handles
An additional rinse chamber valve can be mounted in the locking screw.

Product description Cleanfit CUA451
8 Endress+Hauser
3.1.1 Universal sensor holder
The sensor holder is used to position the sensor correctly in order to ensure correct
measuring accuracy.
If the sensor is not positioned correctly, the ball valve may be blocked or the sensor may be
located in the dead space as a result.
12
A0038451
 2 Short sensor holder
1 Mounting position of the bayonet nut to hold the relevant sensor
2 Grooves of the safety rings to mount the bayonet nut
A0038479
 3 Mounting position of the bayonet nut for CUS65D
The name indicated on the holder serves as a mounting aid. The bayonet nut covers
over the marking for the selected sensor position.

Cleanfit CUA451 Incoming acceptance and product identification
Endress+Hauser 9
4 Incoming acceptance and product
identification
4.1 Incoming acceptance
1. Verify that the packaging is undamaged.
 Notify the supplier of any damage to the packaging.
Keep the damaged packaging until the issue has been resolved.
2. Verify that the contents are undamaged.
 Notify the supplier of any damage to the delivery contents.
Keep the damaged goods until the issue has been resolved.
3. Check that the delivery is complete and nothing is missing.
 Compare the shipping documents with your order.
4. Pack the product for storage and transportation in such a way that it is protected
against impact and moisture.
 The original packaging offers the best protection.
Make sure to comply with the permitted ambient conditions.
If you have any questions, please contact your supplier or your local Sales Center.
4.2 Product identification
4.2.1 Nameplate
The nameplate provides you with the following information on your device:
• Manufacturer identification
• Order code
• Extended order code
• Operating conditions
• Serial number
• Safety information and warnings
• Approvals as per version ordered
‣Compare the information on the nameplate with the order.
4.2.2 Identifying the product
Product page
www.endress.com/CUA451
Interpreting the order code
The order code and serial number of your product can be found in the following locations:
• On the nameplate
• In the delivery papers
Obtaining information on the product
1. Go to www.endress.com.
2. Call up the site search (magnifying glass).
3. Enter a valid serial number.
4. Search.
 The product structure is displayed in a popup window.

Incoming acceptance and product identification Cleanfit CUA451
10 Endress+Hauser
5. Click on the product image in the popup window.
 A new window (Device Viewer) opens. All of the information relating to your
device is displayed in this window as well as the product documentation.
4.2.3 Manufacturer address
Endress+Hauser Conducta GmbH+Co. KG
Dieselstraße 24
D-70839 Gerlingen
4.3 Scope of delivery
The delivery comprises:
• Assembly in the version ordered
• Operating Instructions
‣If you have any queries:
Please contact your supplier or local sales center.
4.4 Certificates and approvals
4.4.1 CE/PED
The assembly has been manufactured according to good engineering practice as per Article
4, Paragraph 3 of the Pressure Equipment Directive 2014/68/EU and is therefore not
required to bear the CE label.

Cleanfit CUA451 Installation
Endress+Hauser 11
5 Installation
5.1 Installation conditions
5.1.1 Dimensions
Assembly with G2 thread and weld-in adapter in measuring position (long and short
stroke)
226 (8.90)
Ø 49.3
(1.94)
*
100
(3.94)
Ø 46
(1.81)
106
(4.17)
1 (0.04)
*
X1
311 (12.24)
67
(2.64)
185 (7.28)
270 (10.63)
109.5 (4.31)
92 (3.62)
115.5 (4.55)
Ø 86 (3.39)
Ø 91 (3.58)
A0038481
 4 Dimensions in mm (in)
X1 Dimensions depend on the sensor

Installation Cleanfit CUA451
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Assembly with G2 thread and weld-in adapter in service position (long and short
stroke)
101 (3.98)
X2
171
(6.73)
100
(3.94)
32
(1.26)
X2
276 (10.87)
A0038630
 5 Dimensions in mm (in)
X2 Dimensions depend on the sensor

Cleanfit CUA451 Installation
Endress+Hauser 13
Assembly with flange connection
Ø 49.3
(1.94)
Ø 46
106 (4.17)
X0
100
(3.94)
X1
85
(3.35)
32 (1.26)
226 (8.90)
(1.81)
32
(1.26)
X2
276 (10.87)
100
(3.94)
101 (3.98)
A0038651
 6 Dimensions in mm (in)
X0 Dimensions depend on the sensor
Sensor X0
CUS52D 26.5 (1.04)
CUS50D 26.3 (1.04)
CUS41/CUS51D,
COS61D
14 (0.55)
CUS65, COS51D 21.3 (0.84)
Sensor measuring
position
X1
CUS52D 139 (5.47)
CUS50D 110 (4.33)
CUS41/CUS51D,
COS61D
101 (3.98)
CUS65, COS51D 59 (2.32)
Sensor service
position, long
X2
CUS52D 638 (25.12)
CUS50D 609 (23.98)
CUS41/CUS51D,
COS61D
600 (23.62)
CUS65, COS51D 558 (21.97)

Installation Cleanfit CUA451
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Sensor service
position, short
X2
CUS52D 533 (20.98)
CUS50D 504 (19.84)
CUS41/CUS51D,
COS61D
495 (19.49)
CUS65, COS51D 453 (17.83)
Sensor holder with sensors
9.25
(0.37)
51.4
(2.02)
60.2
(2.37)
89.5
(3.52)
COS51D
CUS65(D)
COS61(D)
CUS41(D)
CUS51D
CUS50D
CUS52D
131
(5.16)
173 (6.81)
182 (7.17)
211 (8.31)
32
(1.26)
A0038478
 7 Dimensions of sensor holder with sensors in mm (in)
5.1.2 Process connections
A
2"
32 (1.26)
a
b
BC
A0038650
 8 Dimensions of process connections in mm (in)
A Internal thread G2
B Internal thread G2 with weld-in adapter
C Flange DN 50 / PN 16 (as per EN 1092-1) and flange ANSI 2" / 150 lbs
a DN 50: Ø 125 (4.92), ANSI 2": Ø 120.7 (4.75)
b DN 50: Ø 165 (6.50), ANSI 2": Ø 152.4 (6.00)

Cleanfit CUA451 Installation
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5.1.3 Installation instructions
Installation location
The assembly is designed for installation on vessels and pipes. Suitable nozzles must be
available for this. The minimum pipe diameter is DN 80.
‣Before mounting the sensor, mount the assembly on the vessel or in the pipe.
The following diagram shows different installation positions in pipes, and indicates
whether they are permitted or not.
A0038661
 9 Schematic of installation positions and orientations
‣Ideally, the assembly should be mounted in an ascending pipe. Installation in a
horizontal pipe is also possible.
• When using reflective materials (e.g. stainless steel), the pipe diameter must be at least
100 mm (4"). An onsite calibration is recommended.
• Install the sensor in places with uniform flow conditions.
• Do not install the sensor in places where air may collect or foam bubbles form or where
suspended particles may settle.
• Avoid installation in the down pipe.
• Avoid fittings downstream from pressure reduction stages which can lead to outgassing.
Orientations
1
3
4
2
A0038660
 10 Orientations, schematic
1 Sensor (see Accessories)
2 Transmitter
3 CUA451 retractable assembly
4 Direction of flow
The orientation depends on the sensor head. Pay attention to the Operating
Instructions for the relevant sensor.

Installation Cleanfit CUA451
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‣Make sure to avoid a siphon effect at the rinse chamber outlet. The inflow to the rinse
chamber is always from below.
Clearance between the sensor and pipe wall
If the sensor is installed in pipes or very close to the wall, this can cause backscatter and
therefore a higher sensor signal.
‣Follow the instructions in the Operating Instructions for the sensor used.

Cleanfit CUA451 Installation
Endress+Hauser 17
5.2 Mounting the assembly
LWARNING
Medium flows out.
Risk of injury
‣Only install the assembly when the process is deactivated.
‣Before disassembling, always ensure that the process pipe and vessel are
unpressurized, empty and rinsed.
‣Move the assembly to the service position.
‣Close the ball valve.
5.2.1 Installing the assembly in the process
1. Mount the hand lever on the assembly.
2. Open the ball valve.
3. Move the assembly to the service position.
 Retraction pipe is in the assembly.
4. Secure the assembly to the vessel or pipe using the selected process connection.
Flange process connection:
‣Prior to installation, check the flange seal between the flanges.
G2 process connection
‣Use a commercially available sealant (e.g. LOCTITE 561) to seal the G2 process
connection.
5.2.2 Rinse water connection (optional)
NOTICE
Water pressure too high
The assembly can be damaged.
‣A pressure-reducing valve must be connected in series upstream if the water pressure
can increase to over 6 bar (87 psi).
Rinse the sensor in the service position with a second ball valve for the rinse chamber (see
accessories).
1. Connect the rinse water line to the rinsing nozzle provided. The two rinse nozzles on
the assembly are identical and can be used in the inlet and outlet.
2. Operate the rinse water connection of the assembly with a water pressure of 2 bar to
max. 6 bar (29 to 87 psi).
3. Also install a check valve and a dirt trap (100 μm, see "Accessories") in the water pipe
(at the inlet to the assembly).
Apart from water, you can also pass other or additional cleaning solutions through
the rinse chamber. When doing so, pay attention to the material resistance of the
assembly and make sure to comply with the maximum permitted temperatures and
pressures.
5.2.3 Sensor installation
LCAUTION
High pressure in the rinse chamber
Risk of injury from medium and pressure.
‣Connect a hose to the vent valve and vent the rinse chamber carefully.

Installation Cleanfit CUA451
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Releasing the screws
Use the following tools to install the sensor:
• 2.5 mm Allen screw
• 6 mm Allen screw
1.
1
2
A0038431
Release the securing screws (item 1) and put them in a safe place within reach.
2. Turn the bayonet nut.
 The bayonet lock (item 2) is released.
3.
1
2
A0038432
Taking the handles, pull out the retraction pipe (item 2) together with the sensor
holder (item 1) as far as it will go.
4. Close the ball valve! Push down the hand lever as far as possible (only possible in one
direction!).
 When the ball valve is closed, the assembly is sealed from the process.
5. Connect a hose to the vent valve.
6. Vent the rinse chamber.

Cleanfit CUA451 Installation
Endress+Hauser 19
7.
11
A0038433
Release the grub screw (item 1) on the underside of the bayonet nut.
8.
1
2
A0038434
Unscrew the bayonet nut and the sensor holder (item 1) from the retraction pipe. In
doing so, hold the retraction pipe steady and turn the handles (2) counterclockwise
(approx. 9 turns).
9. Holding the handles, pull the bayonet nut, along with the sensor holder, out of the
retraction pipe.
When the sensor is installed, the bracket is the only possible way to check the
alignment of the sensor in the process! Observe the instructions on sensor alignment
in the Operating Instructions for the sensor.

Installation Cleanfit CUA451
20 Endress+Hauser
Screwing in the sensor
‣
A0038441
Screw the sensor hand-tight into the internal thread of the sensor holder.
Aligning the bracket
1.
A0038442
Push the bracket out of the installation bore holes.
 The sensor holder bracket can be fitted in various positions at 60° intervals. In
this way, you can use the bracket to mark the position of the sensor in the
retraction pipe.