Pepperl+Fuchs NVD-111 User manual

ISO9001
Warning Device
NVD-111
PROCESS AUTOMATION
MANUAL

With regard to the supply of products, the current issue of the following document is applicable:
The General Terms of Delivery for Products and Services of the Electrical Industry, published by
the Central Association of the Electrical Industry (Zentralverband Elektrotechnik und
Elektroindustrie (ZVEI) e.V.) in its most recent version as well as the supplementary clause:
"Expanded reservation of proprietorship"
Warning Device NVD-111

Warning Device NVD-111
Contents
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1 Safety................................................................................... 2
1.1 General safety instructions ...........................................................................2
1.2 Used Symbols...............................................................................................2
1.3 Declaration of Conformity .............................................................................3
1.4 Intended Use ................................................................................................3
1.5 Maintenance .................................................................................................4
1.6 Delivery, Transport and Storage ...................................................................4
1.7 Installation and Commissioning ....................................................................4
1.8 Operation......................................................................................................5
1.9 Repair ...........................................................................................................5
1.10 Disposal........................................................................................................5
1.11 Applied Standards and Directives.................................................................5
2 Product Specifications ...................................................... 6
2.1 Function........................................................................................................6
2.2 Product Program...........................................................................................7
2.3 Design and Dimensions................................................................................8
3 Installation ........................................................................ 12
3.1 Mounting of the Sensors .............................................................................12
3.2 Mounting the Warning Device.....................................................................20
3.3 Connection .................................................................................................21
4 Commissioning................................................................. 28
4.1 Configuring the Warning Device using DIP Switches..................................28
5 Operation .......................................................................... 32
5.1 Alarm Signals..............................................................................................32
5.2 Resetting the Alarm Signal..........................................................................33
5.3 Function Testing .........................................................................................34
6 Troubleshooting ............................................................... 35
6.1 Troubleshooting and Alarm States..............................................................35
6.2 Sensor Maintenance...................................................................................36
7 Technical Specifications ................................................. 37
7.1 Warning Device NVD-111...........................................................................37
7.2 Overflow Sensor KVF-O .............................................................................38
7.3 Fat Level Sensor KVF-F..............................................................................38
7.4 Fat Level Sensor FAU-104..........................................................................38
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1Safety
1.1 General safety instructions
Responsibility for planning, assembly, commissioning, operation, maintenance,
and dismounting lies with the system operator.
Installation and commissioning of all devices must be performed by a trained
professional only.
Protection of operating personnel and the system is not ensured if the product is
not used in accordance with its intended purpose.
Laws and regulations applicable to the usage or the intended purpose must be
observed. The devices are only approved for appropriate and intended use.
Ignoring these instructions will void any warranty and absolve the manufacturer
from any liability.
The Declaration of Conformity, Certificate of Compliance, Statement of
Conformity, EC-type-examination certificate and data sheets are an integral part
of this document.
The data sheet contains the electrical data of the Declaration of Conformity, the
Certificate of Compliance and the EC-type-examination certificate.
The documents mentioned are available from http://www.pepperl-fuchs.com or
contact your local Pepperl+Fuchs representative.
1.2 Used Symbols
Safety-relevant Symbols
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warning!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt devices and any connected facilities or systems,
or result in their complete failure.
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Informative Symbols
Action
This symbol indicates a paragraph with instructions.
1.3 Declaration of Conformity
All products were developed and manufactured under observance of the
applicable European standards and guidelines.
The product manufacturer, Pepperl+Fuchs GmbH, 68307 Mannheim, has a
certified quality assurance system that conforms to ISO 9001.
1.4 Intended Use
The warning device is a compact alarm system for monitoring one or two sensors
in grease interceptors.
The warning devices must only be installed in a suitable control cabinet or
NVO5-KV installation housing.
The warning device was designed for:
nthe monitoring of the fat layer thickness, i. e. an alarm if a certain limit of
maximum receptacle capacity of fat has been reached.
nthe monitoring of the overflow of liquid, e. g. in the event of a blocked drain
Note!
This symbol brings important information to your attention.
Note!
A Declaration of Conformity can be requested from the manufacturer.
ISO9001

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Only the following sensors must be connected to the warning device:
1.4.1 Designation
1.5 Maintenance
The device must not be cleaned with caustic fluids.
The devices are maintenance-free. However, to guarantee perfect operation of
the complete alarm system, check the operation, including all sensors, at least
once a year.
1.6 Delivery, Transport and Storage
Check the packaging and contents for damage.
Check if you have received every item and if the items received are the ones you
ordered.
Keep the original packaging. Always store and transport the device in the original
packaging.
Always store the device in a clean and dry environment. The permitted storage
temperature (see data sheet) must be considered.
1.7 Installation and Commissioning
1.7.1 Installation of the warning device
The device must only be installed outside potentially explosive zones. The
device must not be installed in places with potentially aggressive vapors.
The device must be free of voltage during installation and maintenance. The
warning system must only be connected to the supply voltage after complete
mounting and connection of the sensors.
The identification plate must not be removed.
Description Type code
Fat level sensor, for detecting fat layer thickness in an aqueous
emulsion with small lumps of fat or a hardened layer of fat
FAU-104
Fat level sensor, for detecting fat layer thickness in a liquid layer of fat KVF-F
Overflow sensor, for detecting excessively high liquid level KVF-O
Warning device
Pepperl+Fuchs GmbH
Lilienthalstrasse 200, 68307 Mannheim, Germany
NVD-111

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1.8 Operation
1.8.1 Availability of Emulsion
Grease interceptors are plants which can separate fat from water. It may occur
that fat is not separated due to the emulsion that has formed. An emulsion is a
more or less stable mixture of fat and water. If the water content in the fat is too
high, the sensor does not detect any fat.
1.9 Repair
The devices must not be repaired, changed or manipulated. If there is a defect,
the product must always be replaced with an original device.
1.10 Disposal
Disposal of devices and their packaging material must be performed in
compliance with the applicable laws and guidelines of the corresponding country.
The devices do not contain batteries which need to be disposed of separately
from the products.
1.11 Applied Standards and Directives
EN 50178:1997
EN 61000-6-4:2007
EN 61326-1:2013
EMC Directive 2004/108/EC
Low Voltage Directive 2006/95/EC

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2 Product Specifications
2.1 Function
The warning device monitors the status of
na fat level sensor or
nan overflow sensor or
nthe combination of an overflow sensor and a fat level sensor
in a grease interceptor.
LEDs at the device indicate alarm, sensor fault and system and sensor status. In
the event of an alarm, an additional acoustic signal sounds.
The fat in the grease interceptor can be of various compositions. The following
conditions are possible:
nThe fat is liquid. Such fat is found in, e. g., the manufacture and storage of
vegetable fats. This fat forms a liquid fat layer which clearly separates from
water. For this composition of fat, please use fat level sensor KVF-F for
detecting the fat layer thickness.
nThe fat is hard. Such fat is found in, e. g., waste water from sinks or
dishwashers and in floor drains in large kitchens or catering
establishments. This fat consists of a mixture of animal and vegetable fats.
It typically forms an aqueous emulsion with small lumps of fat or a
hardened layer of fat. For this composition of fat, please use fat level
sensor FAU-104 for detecting the fat layer thickness.
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2.2 Product Program
Warning device
Sensors
Accessories
Description Type code
Warning device, 230 V AC NVD-111
Description Type code
Fat level sensor, for detecting fat layer thickness in an aqueous
emulsion with small lumps of fat or a hardened layer of fat
FAU-104
Fat level sensor, for detecting fat layer thickness in a liquid layer of fat KVF-F
Overflow sensor, for detecting excessively high liquid level KVF-O
Description Type code
Cable connector IP68 for one sensor LAL-SK2
Mounting set for one sensor NVO5-B
Installation housing with DIN mounting rail NVO5-KV

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2.3 Design and Dimensions
Warning device NVD-111
Figure 2.1
Installation housing NVO5-KV
Figure 2.2
1DIP switches
2LEDs
3Connections for power supply and potential-free contacts
4Reset button
5Sensor connections
NVD-111
ALARM
RESET SUPPLY FAT LAYER ALARM
OVERFLOW
ALARM
SYSTEM
OK
68307 Mannhei m Germany
www.pepperl -fuchs.com
Fat Alarm System
70 58
86
54
423
51
200
116 105

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Overflow sensor KVF-O
Figure 2.3
1Lower section with laser marking
2Middle section
3Upper section
4Cable
5Switching point
3
1
5
4
2
138
25
Ø31.6

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Fat level sensor KVF-F
Figure 2.4
1Lower section with laser marking
2Middle section
3Upper section
4Cable
5Shrink tubing
6Switching point
3
1
6
4
5
2
138
25
300
Ø31.6

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Fat level sensor FAU-104
Figure 2.5
1Lower section
2Laser marking
3Cable
4Shrink tubing
5Reflectors
6Schwitching point
4
3
2
1
5
6
152
300
Ø38
66

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3 Installation
3.1 Mounting of the Sensors
Read the chapter on Safety and, in particular, the section on Installation and
Commissioning (see chapter 1.7) before mounting the sensor. Do not remove the
identification plate.
During installation, read the instructions provided by the grease interceptor
manufacturer. Ensure that the suspension mechanism keeps the sensor
permanently at the correct height. Where possible, secure the device in a position
where it can be reached from the manhole opening so that it can be removed
when emptying (disposal) or carrying out maintenance work on the grease
interceptor.
The oil/petrol separator can be made of various materials. We therefore
recommend using the following methods to secure the device in a suspended
position:
nIf mounting the device in concrete containers, use the NVO5-B mounting
set. See the figure below.
nIf mounting the device in containers made from other materials, such as
plastic or metal, use other suspension devices as appropriate, for example,
screws and screw anchors.
Warning!
Risk of short circuit
Injuries and damage to the device are possible when working with live parts.
nBefore working on the device, always disconnect the supply voltage.
nConnect the device to the supply voltage only after completion of the work.
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Figure 3.1 Mounting using cable connector and mounting set
3.1.1 Mounting the KVF-O Overflow Sensor
Usually, the switching point of the sensor must be located a few centimeters
above the normal liquid level (water zero line) in a position so close to the water
zero line that the switching point is surrounded by liquid when an overflow occurs.
This occurs
nwhen there is back pressure in the sewage system or
nif the drain is blocked.
The switching point of the sensor is located between the insulated connecting
piece and the top metal section (see chapter 2.3).
1Mounting set for one sensor NVO5-B
2Cable connector for one sensor LAL-SK2
21

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Figure 3.2 Mounting the overflow sensor
If a non-electrically conductive fat layer settles on the surface, there is a risk that a
possible overflow will not be detected by the sensor. Therefore we recommend
mounting a pitot tube for overflow sensor KVF-O. This ensures that the sensor
only comes into contact with water and the overflow is detected. The following
diagram shows the composition.
1Overflow sensor KVF-O
AAir
BFat, oil, grease (FOG)
CWater
LWater zero line
SSensor switching point
XAlarm limit (maximum liquid level)
B
C
A
1
L
S
X

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Figure 3.3 Mounting the overflow sensor KVF-O with pitot tube
1Overflow sensor KVF-O
AAir
BFat, oil, grease (FOG)
CWater
DOpen pitot tube (not supplied)
LWater zero line
SSensor switching point
XAlarm limit (maximum liquid level)
B
C
A
1
D
L
S
X

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3.1.2 Mounting the KVF-F Fat Level Sensor
The sensor must be immersed a few centimeters when the liquid is at its normal
level (water zero line).
The exact immersion depth depends on
nthe type of grease interceptor,
nits design,
nits capacity
nand the height of the maximum fat layer thickness.
The sensor must always be immersed in the liquid. The switching point of the
sensor is located between the insulated connecting piece and the top metal
section (see chapter 2.3).
Caution!
Damage to the cable as a result of aggressive greases
The sensor cable must not be in continuous contact with grease or with water that
contains grease. The sensor is therefore fitted with shrink tubing. The shrink
tubing protects the cable from the effect of the grease to a fat layer thickness of
30 cm.
If fat layer thicknesses of more than 30 cm occur in your application, protect the
cable with additional shrink tubing.

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Figure 3.4 Mounting the fat level sensor
1Fat level sensor KVF-F
2Shrink tubing
AAir
BFat, oil, grease (FOG)
CWater
LWater zero line
SSensor switching point
XAlarm limit (maximum fat layer thickness)
L
S
B
C
A
1
2
300
X

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3.1.3 Mounting the FAU-104 Fat Level Sensor
The sensor must be immersed a few centimeters when the liquid is at its normal
level (water zero line).
The exact immersion depth depends on
nthe type of grease interceptor,
nits design
nand the height of the maximum fat layer thickness.
The sensor must always be immersed in the liquid. The switching point of the
sensor is located at the same level as the reflectors (see chapter 2.3).
Caution!
Damage to the cable as a result of aggressive greases
The sensor cable must not be in continuous contact with grease or with water that
contains grease. The sensor is therefore fitted with shrink tubing. The shrink
tubing protects the cable from the effect of the grease to a fat layer thickness of
30 cm.
If fat layer thicknesses of more than 30 cm occur in your application, protect the
cable with additional shrink tubing.