wtw Cleaning Air Box User manual

ba75731e02 02/2008
Cleaning Air Box
Operating manual
Cleaning Air Box
Compressed air supply unit

Cleaning Air Box
ba75731e02 02/2008
Accuracy when
going to press
The use of advanced technology and the high quality standard of our
instruments are the result of continuous development. Consequently,
this may result in some differences between this operating manual and
your instrument. Also, we cannot guarantee that there are absolutely
no errors in this manual. Therefore, we are sure you will understand
that we cannot accept any legal claims resulting from the data, figures
or descriptions.
Note
The latest version of the present operating manual can be found on the
Internet under www.WTW.com.
Copyright ©Weilheim 2008, WTW GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of WTW GmbH, Weilheim.
Printed in Germany.

Cleaning Air Box Contents
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Cleaning Air Box - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1 Structure and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1 User qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 Requirements of the measurement location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.3 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.4 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.4.1 General installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.4.2 Connecting the wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.5 Installing / retrofitting a check valve (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Actions against the formation of condensate and icing . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
5 Maintenance and cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1.1 General maintenance instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1.2 Exchange of the pump membrane and valve plates . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
6 Replacement parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
7 What to do if ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
8 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Contents Cleaning Air Box
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Cleaning Air Box Overview
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1Overview
1.1 Structure and function
The Cleaning Air Box is used to clean sensors with compressed air. It
is suitable to be used at the measuring location and can be installed
outdoors (sun shield recommended). The integrated compressor
(membrane pump) draws in air from outside through an intake air filter
and presses it through the cleaning nozzles at the sensor. This cleans
the sensor element.
Operation takes place at intervals. The pump is switched on and off
with an external switch. A relay contact of the measuring system is
used as the switch. The relay contact is configured and controlled for
the cleaning function via the software of the measuring system.
System requirements Depending on the measuring system, the following is required:
zIQ SENSOR NET System 182: A free relay contact in the Universal
Transmitter DIQ/S 182.
zIQ SENSOR NET Systems 184 XT and 2020 XT: A free relay contact
in an MIQ/CR3 or MIQ/R6.
zAnalog measuring transmitters (series 170/296): A free relay output
in an instrument with R option.
Circuit diagram
Fig. 1-1 Circuit diagram of the Cleaning Air Box
Air
To the sensor
5R2
R1
xxx V AC
L
N
4
3
2
1
T>70°C
M
Compressor

Overview Cleaning Air Box
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The following example shows the use of the Cleaning Air Box in an
IQ SENSOR NET System 182:
Fig. 1-2 Application example for the Cleaning Air Box
Cleaning Air Box
Sun shield SSH/IQ
Compressed air hose
(CH scope of delivery) Swing mounting assembly
EH/F 170/x
Single electrode
holder EH/U 170
Cleaning Air Box
Mounting stand
BE/ST 170
Cleaning head CH
DIQ/S 182

Cleaning Air Box Safety instructions
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2 Safety instructions
This operating manual contains essential instructions that must be
followed during the commissioning, operation and maintenance of the
Cleaning Air Box. Thus, it is essential for the operator to read this
component operating manual before carrying out any work with the
Cleaning Air Box.
General safety
instructions
Safety instructions in this operating manual are indicated by the
warning symbol (triangle) in the left column. The signal word (e.g.
"Caution") indicates the danger level:
Warning
indicates instructions that must be followed precisely in order to
prevent serious dangers to personnel.
Caution
indicates instructions that must be followed precisely in order to
avoid slight injuries to personnel or damage to the instrument or
the environment.
Other labels
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. component
operating manuals.
2.1 User qualification
Installation Installation may only be carried out by a trained electrician.
Maintenance All maintenance activities that require the opening of the enclosure may
only be carried out by a trained electrician.

Safety instructions Cleaning Air Box
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2.2 Authorized use
Authorized use of the Cleaning Air Box is the supply with compressed
air of compressed air-driven sensor cleaning systems. Please observe
the technical specifications according to chapter 8 TECHNICAL DATA.
Only operation and running according to the instructions in this
operating manual is authorized.
Any other use is considered to be unauthorized. Unauthorized use
invalidates any claims with regard to the guarantee.
2.3 General safety instructions
The Cleaning Air Box is built and tested according to the relevant
guidelines and standards (see chapter 8 TECHNICAL DATA).
It left the factory in a safe and secure technical condition.
Function and
operational safety
The failure-free function and operational safety of the Cleaning Air Box
components are only guaranteed if the generally applicable safety
measures and the special safety instructions in this operating manual
are followed during their use.
The failure-free function and operational safety of the Cleaning Air Box
is only guaranteed under the environmental conditions that are
specified in chapter 8 TECHNICAL DATA.
If the Cleaning Air Box is transported from a cold environment into a
warm environment, this can cause a functional malfunction through the
formation of condensation. In this case, wait for the components to
adjust to room temperature before recommissioning.
Safe operation If safe operation is no longer possible, the Cleaning Air Box must be
taken out of operation and secured against inadvertent operation.
Safe operation is no longer possible if components:
zhave been damaged in transport
zhave been stored under adverse conditions for a lengthy period of
time
zare visibly damaged
zno longer operate as described in this manual.
If you are in any doubt, contact the supplier of your Cleaning Air Box.

Cleaning Air Box Installation
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3 Installation
3.1 Scope of delivery
The following parts are included in the scope of delivery of the Cleaning
Air Box:
zCleaning Air Box
zAccessory set, including
– Intake air filter
– 4 x screws M5x16
– Fitting for compressed air hose
– Hose clip
zOperating manual.
3.2 Requirements of the measurement location
Warning
The Cleaning Air Box is not suitable for operation in a potentially
explosive environment.
Ambient conditions If the Cleaning Air Box is installed outside it should be protected by a
sun shield against the effects of the weather (snow, ice and direct solar
radiation). The measurement location must meet the environmental
conditions specified in chapter 8 TECHNICAL DATA.
3.3 Mounting
Sun shield mounting Suitable sun shields are the SSH/IQ (single) and SD/M 170-D (double).
Note
Ordering information on the sun shields is given in
chapter 6 REPLACEMENT PARTS AND ACCESSORIES.
Mount the Cleaning Air Box on the sun shield as follows.
1Open the lid of the Cleaning Air Box.
2 Mount the Cleaning Air Box on the sun shield by tightening the
supplied M5 screws at the corners.

Installation Cleaning Air Box
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Connecting the
compressed air hose
and intake filter
Fig. 3-1 Connecting the compressed air hose and intake air filter
To connect the compressed air hose use the supplied fitting (pos. 1 in
Fig. 3-1) and secure the compressed air hose with the supplied hose
clip (pos. 2). Screw the intake air filter (pos. 3) into the filter socket (pos.
4) by hand.
Note
The cleaning nozzles at the sensor may only be immersed 1.5 m max.
When installing the compressed air hose make sure no water that
possibly remains in the hose can enter the Cleaning Air Box.
Cleaning Air Box
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