Endress+Hauser Flowfit CUA252 User manual

Products Solutions Services
BA01281C/07/EN/01.13
71238090
Operating Instructions
Flowfit CUA252
Flow assembly for CUS52D turbidity sensor

Endress+Hauser
Document information
Warnings
The structure, signal words and safety colors of the signs comply with the specifications of
ANSI Z535.6 ("Product safety information in product manuals, instructions and other
collateral materials").
Symbols
Safety message structure Meaning
DANGER
!
Causes (/consequences)
Consequences if safety
message is not heeded
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the situation will result in a fatal or serious
injury.
WARNING
!
Causes (/consequences)
Consequences if safety
message is not heeded
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the situation can result in a fatal or serious
injury.
CAUTION
!
Causes (/consequences)
Consequences if safety
message is not heeded
‣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
Consequences if safety
message is not heeded
‣Action/note
This symbol alerts you to situations that can result in
damage to property and equipment.
Additional information, tips
Permitted or recommended
Forbidden or not recommended

Flowfit CUA252
Endress+Hauser 3
Table of contents
1 Basic safety instructions . . . . . . . . . . . . . 4
1.1 Requirements for personnel . . . . . . . . . . . . . . . . . . 4
1.2 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Occupational safety . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Product safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Incoming acceptance and product
identification . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Incoming acceptance . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Product identification . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Certificates and approvals . . . . . . . . . . . . . . . . . . . . 6
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Installation conditions . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Installation instructions . . . . . . . . . . . . . . . . . . . . 10
3.4 Sensor installation . . . . . . . . . . . . . . . . . . . . . . . . 13
3.5 Post-installation check . . . . . . . . . . . . . . . . . . . . . 13
4 Commissioning. . . . . . . . . . . . . . . . . . . . 14
5 Maintenance. . . . . . . . . . . . . . . . . . . . . .15
5.1 Cleaning the assembly . . . . . . . . . . . . . . . . . . . . . 15
5.2 Cleaning the sensor . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Cleaning agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4 Checking and replacing the seals . . . . . . . . . . . . 16
6 Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1 Spare parts kits . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.2 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7 Accessories . . . . . . . . . . . . . . . . . . . . . . . 18
7.1 Connection accessories . . . . . . . . . . . . . . . . . . . . . 18
7.2 Bubble trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.3 Wall mounting kit . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 Technical data . . . . . . . . . . . . . . . . . . . . 20
8.1 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.2 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.3 Mechanical construction . . . . . . . . . . . . . . . . . . . 21
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Basic safety instructions Flowfit CUA252
4Endress+Hauser
1 Basic safety instructions
1.1 Requirements for personnel
‣Installation, commissioning, operation and maintenance of the measuring system must
only be carried out by specially trained technical personnel.
‣The technical personnel must be authorized for the specified activities by the system
operator.
‣Electrical connection must only be carried out by a certified electrician.
‣Technical personnel must have read and understood these Operating Instructions and
must adhere to them.
‣Faults at the measuring point may only be rectified by authorized and specially trained
personnel.
Repairs not described in the enclosed Operating Instructions may only be carried out
directly at the manufacturer’s or by the service organization.
1.2 Designated use
The CUA252 flow assembly is designed for the installation of the CUS52D turbidity sensor.
Its main areas of application are:
• Final turbidity measurement in the outlet of waterworks
• Turbidity measurement in the inlet of waterworks
• Turbidity measurement at all stages of the process
• Turbidity measurement for filter monitoring and filter backwashing
• Turbidity measurement in drinking water networks
Any other use than the one described here compromises the safety of persons and the entire
measuring system and is therefore not permitted.
The manufacturer is not liable for damage resulting from improper or non-designated use.
1.3 Occupational safety
As the user, you are responsible for complying with the following safety conditions:
• Explosion protection guidelines (only devices approved for use in explosion hazardous
areas)
• Installation instructions
• Local prevailing standards and regulations
Electromagnetic compatibility
This device has been tested for electromagnetic compatibility in accordance with the
applicable European standards for industrial applications.
The electromagnetic compatibility indicated only applies to a device that has been connected
in accordance with the instructions in these Operating Instructions.
1.4 Operational safety
‣Before commissioning the entire measuring point, make sure all the connections are
correct. Ensure that electrical cables and hose connections are not damaged.
‣Do not operate damaged products, and secure them against unintentional
commissioning. Label and identify the damaged product as defective.
‣If faults cannot be rectified, you must take the products out of service and secure them
against unintentional commissioning.

Flowfit CUA252 Basic safety instructions
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1.5 Product safety
The product is designed to meet state-of-the-art safety requirements, has been tested and
left the factory in a condition in which it is safe to operate.
Relevant regulations and European standards have been observed.

Incoming acceptance and product identification Flowfit CUA252
6Endress+Hauser
2 Incoming acceptance and product
identification
2.1 Incoming acceptance
• Make sure the packaging is undamaged!
• Notify the supplier of any damage to the packaging. Keep the damaged packaging until the
matter has been settled.
• Make sure the contents are not damaged!
• Notify the supplier of any damage to the delivery contents. Keep the damaged products
until the matter has been settled.
• Check the delivery to make sure nothing is missing. Compare it against the shipping
documents and your order.
• Pack the product for storage and transportation in such a way that it is reliably protected
against impact and moisture. The original packaging offers the best protection.
Furthermore, the permitted ambient conditions must also be observed (see "Technical
data").
• If you have any questions, contact your supplier or your local sales center.
2.2 Product identification
2.2.1 Nameplate
You can find the following information on the nameplate:
• Manufacturer details
•Ordercode
• Extended order code
• Serial number
• Operating conditions
• Safety information symbols
Compare the order code on the nameplate with your order.
2.2.2 Identifying the product
The order code and serial number of your device can be found in the following locations:
• On the nameplate
• In the shipping documents
To discover what product version you have, enter the order code on the nameplate into
the search screen at the following address:
www.products.endress.com/order-ident
2.3 Scope of delivery
The scope of delivery comprises:
• 1 Flowfit CUA252 flow assembly in the version ordered
• 1 Set of Operating Instructions BA01281C/07/EN
If you have any questions, contact your supplier or your local sales center.
2.4 Certificates and approvals
Declaration of Conformity
The product meets the requirements of the harmonized European standards.
As such, it complies with the legal specifications of the EC directives.
The manufacturer confirms successful testing of the product by affixing to it the 4mark.

Flowfit CUA252 Installation
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3Installation
3.1 Dimensions
a0022255
Fig. 1: Dimensions in mm (inch)
Connections NPT ¾" Rp ¾ Glue-in port
D25
ANSI 2" Hose
D25
Hose
D12
G1¼
Xmm(inch) 70 (2.76) 64 (2.52) 22 (0.87) 71 (2.80) 74 (2.91) 74 (2.91) 0
Ymm(inch) Ø 58(2.28) Ø 58(2.28) Ø 58(2.28) Ø 152 (5.98) Ø 58(2.28) Ø 58(2.28) Ø 58(2.28)

Installation Flowfit CUA252
8Endress+Hauser
3.2 Installation conditions
To ensure that medium flows through the assembly in a bypass configuration, the pressure
p1 must be greater than the pressure p2. This is achieved by installing an orifice plate in the
main pipe.
a0022258
Fig. 2: Connection example involving a bypass and an orifice plate in the main pipe (supply from below)
p1 p2 p1 > p2

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No measures to increase pressure are required for branch pipes that branch off from the
main pipe.
a0022259
Fig. 3: Connection example involving an open outlet
The inlet and outlet connection of the flow assembly are always identical, the system is
symmetrical.
Install the flow assembly vertically.
The supply must be connected at the bottom (upward flow in the pipe).
Avoid buckles and loops in the hose system.
Pay attention to the installation instructions (flow direction) for the sensor.
Many fluids tend to develop gas bubbles in a depressurized state.
Operating the flow assembly under pressure (adjustable valve after the flow assembly)
prevents this behavior in many cases.

Installation Flowfit CUA252
10 Endress+Hauser
3.3 Installation instructions
3.3.1 Measuring system
A complete measuring system consists of:
• Flowfit CUA252 flow assembly
• Turbimax CUS52D sensor
• Transmitter, e.g. Liquiline CM442
•Measuringcable
a0022262
Fig. 4: Measuring system (example)
1 Process pipe
2 Liquiline CM442 transmitter
3Measuringcable
4 Return line with shutoff valve
5 CUA252 flow assembly with CUS52D sensor
6 Supply line with shutoff valve