Lutz-Jesco C 7700 User manual

Dosing
Conveying
Control
Liquids
Gases
Systems
Original operating instructions
© Lutz-Jesco GmbH 2017
BA-20710-02-V05
Read the operating manual!
The user is responsible for installation and operation related mistakes!
Chlorine control valve
C 7700
Operating instructions

Table of Contents 3
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
Table of Contents
1 Notes for the Reader ..........................................................4
1.1 General non-discrimination......................................................4
1.2 Explanation of the signal words ................................................4
1.3 Explanation of the warning signs .............................................4
1.4 Identification of warnings.........................................................4
1.5 Instruction for action identification ...........................................4
2 Safety .................................................................................5
2.1 General warnings.....................................................................5
2.2 Information about chlorine .......................................................5
2.3 Hazards due to non-compliance with the safety instructions .....6
2.4 Working in a safety-conscious manner .....................................6
2.5 Personal protective equipment.................................................6
2.6 Personnel qualification.............................................................6
3 Intended use ......................................................................8
3.1 Notes on product warranty .......................................................8
3.2 Intended purpose.....................................................................8
3.3 Prohibited dosing media...........................................................8
4 Product description ...........................................................9
4.1 Scope of delivery .....................................................................9
4.2 Design.....................................................................................9
4.3 Function description ................................................................9
4.4 Rating plate ...........................................................................10
5 Technical data..................................................................11
6 Dimensions ......................................................................12
7 Installation .......................................................................13
7.1 Installation location................................................................13
7.2 Installing the device ...............................................................13
7.3 Hydraulic installations............................................................14
7.4 Completing the installation.....................................................16
7.5 Installation plans....................................................................17
8 Servomotors.....................................................................18
8.1 Opening and closing the servomotor.......................................18
8.2 Servomotor 3-point step ........................................................18
8.3 Servomotor 4-20 mA .............................................................20
9 Control..............................................................................23
9.1 Manual operation...................................................................23
9.2 Automatic operation...............................................................23
10 Operation..........................................................................23
10.1 Setting the dosing quantity...................................................23
10.2 Shutting down in an emergency ...........................................23
10.3 Test intervals .......................................................................23
11 Start-up............................................................................24
11.1 Vacuum system leak test......................................................24
11.2 Turning on the device ...........................................................24
11.3 Adjusting the dosing capacity...............................................24
12 Shutdown.........................................................................25
12.1 Short-term shutdown...........................................................25
12.2 Long-term shutdown ...........................................................25
12.3 Disposal of old equipment....................................................25
13 Maintenance ....................................................................26
13.1 Maintenance intervals..........................................................26
13.2 Maintenance accessories.....................................................26
13.3 Preparing the system for maintenance .................................26
13.4 Valve maintenance...............................................................26
14 Troubleshooting ...............................................................29
15 Spare parts.......................................................................30
15.1 Individual parts for C 7700 up to 2500 g/h ............................30
15.2 Individual parts for C 7700 from 4 kg/h.................................32
15.3 Maintenance sets ................................................................32
16 EU Declaration of Conformity...........................................33
17 Declaration of no objection..............................................34
18 Warranty claim.................................................................35
19 Index.................................................................................36

Notes for the Reader
Instruction for action identification
4© Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
1 Notes for the Reader
This operating manual contains information and behaviour rules for the
safe and designated operation of the device.
Observe the following principles:
nRead the entire operating manual prior to starting-up the device.
nEnsure that everyone who works with or on the control valve has read
the operating manual and follows it.
nMaintain the operating manual throughout the service life of the
control valve.
nPass the operating manual on to any subsequent owner of the control
valve.
1.1 General non-discrimination
In this operating manual, only the male gender is used where grammar
allows gender allocation. The purpose of this is to make the text easy to
read. Men and women are always referred to equally. We would like to
ask female readers for understanding of this text simplification.
1.2 Explanation of the signal words
Different signal words in combination with warning signs are used in this
operating manual. Signal words illustrate the gravity of possible injuries if
the risk is ignored:
Signal word Meaning
DANGER Refers to imminent danger. Ignoring this sign may
lead to death or the most serious injuries.
WARNING
Refers to a potentially hazardous situation.
Failure to follow this instruction may lead to death
or severe injuries.
CAUTION
Refers to a potentially hazardous situation.
Failure to follow this instruction may lead to
minor injury or damage to property.
NOTE Refers to a danger which, if ignored, may lead to
risk to the machine and its function.
Table 1: Explanation of the signal words
1.3 Explanation of the warning signs
Warning signs represent the type and source of a danger:
Warning sign Type of danger
Danger point
Danger from electrical voltage
Danger from corrosive substances
Danger from potentially-explosive substances
Danger of damage to machine or functional
influences
Table 2: Explanation of the warning signs
1.4 Identification of warnings
Warnings are intended to help you recognise risks and avoid negative
consequences.
This is how warnings are identified:
Warning sign SIGNAL WORD
Description of danger.
Consequences if ignored.
ðThe arrow signals a safety precaution to be taken to eliminate the
danger.
1.5 Instruction for action identification
This is how pre-conditions for action are identified:
üPre-condition for action which must be met before taking action.
@A resource such as a tool or auxiliary materials required to perform
the operating instructions.
This is how instructions for action are identified:
èSeparate step with no follow-up action.
1. First step in a series of steps.
2. Second step in a series of steps.
4Result of the above action.
üAction completed, aim achieved.

Safety
Information about chlorine 5
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
2 Safety
2.1 General warnings
The following warnings are intended to help you eliminate the dangers
that can arise while handling the control valve. Risk prevention measures
always apply regardless of any specific action.
Safety instructions warning against risks arising from specific activities
or situations can be found in the respective sub-chapters.
DANGER
Danger to life from chlorine poisoning!
Chlorine is poisonous. In severe cases, breathing in chlorine may lead
to death. It irritates the eyes, the respiratory system and the skin.
ðInstall a gas warning device.
ðUse sufficient personal protective equipment.
ðWhen carrying out any work on the system, use a respirator mask
with a Type B gas filter that complies with EN 14387.
ðAlways comply with the accident prevention regulations that apply
at the place of use.
ðGet rid of leaks without delay. You must get rid of even very minor
leaks without delay. Together with the humidity, chlorine forms
hydrochloric acid and corrosion results in rapidly increasing
leakage.
ðUse only chlorine-resistant seals.
ðOnly use seals once. Reusing them leads to leaks.
DANGER
Increased danger to life from chlorine escape
A fatal quantity of chlorine gas can be released from a leakage.
ðIf chlorine escapes, leave the room immediately.
ðUse sufficient personal protective equipment.
ðIf chlorine gas escapes, wear a Type 2 self-contained breathing
apparatus that complies with EN 137.
ðOnly initiate counter measures after putting on the protective
equipment.
ðGiven a serious escape and insufficient equipment or qualifica-
tions, leave the work to professional emergency services
personnel. Do not take any unnecessary risks.
DANGER
Danger to life through explosions!
When using dosing devices without ATEX certification in a potentially
explosive area, explosions can occur that result in fatal injuries.
ðNever use the device in potentially explosive areas.
WARNING
Increased risk of accidents due to insufficient qualifica-
tion of personnel!
Chlorinators and their accessories must only be installed, operated
and maintained by personnel with sufficient qualifications. Insufficient
qualification will increase the risk of accidents.
ðEnsure that all action is taken only by personnel with sufficient and
corresponding qualifications.
ðPrevent access to the system for unauthorised persons.
NOTE
Damage to the system due to corrosion
Chlorine gas is highly hygroscopic. This means that humidity enters
the system at any open connection on devices or pipes, which results
in the formation of hydrochloric acid and contamination. Thus
inevitably causing damage to the units.
ðKeep all connections (including in the vacuum system and on all
devices not currently in use) closed at all times.
ðAfter maintenance work is complete, remove all water residues
from the system before placing it into operation.
2.2 Information about chlorine
Chlorine is a hazardous substance. The chemical element chlorine is a
greenish-yellow, toxic gas with a pungent odour, which can be detected
in the air at concentrations below 1 ppm (= 1 ml/m³).
Chlorine is 2.5 times heavier than air and accumulates at ground level.
Chlorine is extremely toxic for water organisms. The reason for the
toxicity of chlorine is its extraordinary reactivity. It reacts with animal and
vegetable tissue and thus destroys it.
Air with a chlorine gas content of 0.5 -1% leads to a quick death in
mammals and humans, as it attacks the respiratory tract and the
pulmonary alveolus (formation of hydrogen chloride or hydrochloride
acid).
NOTE
Faults due to insufficient chlorine quality
Impurities in the chlorine gas form deposits in devices and valves and
can attack the components chemically. This can lead to malfunctions.
ðOnly use technically pure chlorine that meets the following
requirements:
- Mass content of chlorine at least 99.5%
- Water content max. 20 mg/kg
Chlorine that complies with EN 937 or EN 15363 meets these
requirements.

Safety
Personnel qualification
6© Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
2.3 Hazards due to non-compliance with the safety
instructions
Failure to follow the safety instructions may endanger not only persons,
but also the environment and the device.
The specific consequences can be:
nfailure of vital functions of the control valve and the system,
nfailure of required maintenance and repair methods,
ndanger for individuals through dangerous dosing media,
ndanger to the environment caused by substances leaking from the
system.
2.4 Working in a safety-conscious manner
Besides the safety instructions specified in this operating manual, further
safety rules apply and must be followed:
naccident prevention regulations,
nsafety and operating provisions,
nsafety provisions for handling dangerous substances (mostly the
safety data sheets to dosing media),
nenvironmental protection provisions,
napplicable standards and legislation.
2.5 Personal protective equipment
Based on the degree of risk posed by the dosing medium and the type of
work you are carrying out, you must use corresponding protective
equipment. Read the Accident Prevention Regulations and the Safety
Data Sheets to the dosing media find out what protective equipment you
need.
You will require the minimum of the following personal protective
equipment:
Personal protective equipment required
Respirator mask
Protective clothing
Safety shoes
Protective gloves
Table 3: Personal protective equipment required
Wear the following personal protective equipment when performing the
following tasks:
nCommissioning,
nAll work on gas-bearing sections of the plant,
nChanging the chlorine tank,
nShutdown,
nMaintenance work,
nDisposal.
2.6 Personnel qualification
Any personnel who work on the device must have appropriate special
knowledge and skills.
Anybody who works on the device must meet the conditions below:
nattendance at all the training courses offered by the owner,
npersonal suitability for the respective activity,
nsufficient qualification for the respective activity,
ntraining in how to handle the device,
nknowledge of safety equipment and the way this equipment functions,
nknowledge of this operating manual, particularly of safety instructions
and sections relevant for the activity,
nknowledge of fundamental regulations regarding health and safety
and accident prevention.
All persons must generally have the following minimum qualification:
ntraining as specialists to carry out work on the device unsupervised,
nsufficient training that they can work on the device under the
supervision and guidance of a trained specialist.
These operating instructions differentiate between these user groups:
2.6.1 Specialist staff
Thanks to their professional training, knowledge, experience and
knowledge of the relevant specifications, specialist staff are able to
perform the job allocated to them and recognise and/or eliminate any
possible dangers by themselves.
2.6.2 Trained electricians
Due to their professional training, knowledge and experience as well as
knowledge of specific standards and provisions, trained electricians are
able to do the electrical work assigned to them and to recognise and
avoid any potential dangers by themselves.
They are specially trained for their specific working environment and are
familiar with relevant standards and provisions.
They must comply with the legally binding regulations on accident
prevention.
2.6.3 Trained persons
Trained persons have received training from the operator about the tasks
they are to perform and about the dangers stemming from improper
behaviour.
Trained persons have attended all trainings offered by the operator.

Safety
Personnel qualification 7
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
2.6.4 Personnel tasks
In the table below you can check what qualifications are the pre-condi-
tion for the respective tasks. Only people with appropriate qualifications
are allowed to perform these tasks!
Qualification Activities
Specialist staff nTransportation
nAssembly
nHydraulic installations
nCommissioning
nTaking out of operation
nFault rectification
nMaintenance
nRepairs
nDisposal
Trained persons nStorage
nControl
Table 4: Personnel qualification

Intended use
Prohibited dosing media
8© Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
3 Intended use
3.1 Notes on product warranty
Any non-designated use of the device can impair its function and the
protection provided. This leads to invalidation of any warranty claims!
Please note that liability is on the side of the user in the following cases:
nThe device is operated in a manner which is not consistent with these
operating instructions, particularly safety instructions, handling
instructions and the section "Intended Use".
nInformation on usage and environment (see section 5 „Technical
data“ on page11) is not adhered to.
nInformation on the technical data of the servomotors is not adhered to
(see section 8 „Servomotors“ on page18).
nIf people operate the device who are not adequately qualified to carry
out their respective activities.
nNo original spare parts or accessories of Lutz-Jesco GmbH are used.
nUnauthorised changes are made to the device.
nThe user uses different dosing media than those indicated in the
order.
nMaintenance and inspection intervals are not adhered to as required
or not adhered to at all.
nThe device is commissioned before it or the corresponding system
has been correctly and completely installed.
nSafety equipment has been bridged, removed or made inoperative in
any other way.
3.2 Intended purpose
The regulation valve C 7700 is intended for the adjustment of the gas
mass flow only. It may only be used in vacuum dosing systems.
The device was designed for use with chlorine, which has a minimum
chlorine mass content of 99.5 %.
3.3 Prohibited dosing media
The device must not be used for the following media and substances:
nAny gases except chlorine gas
nMedia with a pressure not less than the atmospheric pressure
nChlorine of insufficient quality
Approval must be sought from the manufacturer before using with other
media.

Product description
Function description 9
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
4 Product description
4.1 Scope of delivery
Please compare the delivery note with the scope of delivery.The
following items are part of the scope of delivery:
nValve with servomotor
nWall panel and installation material (optional)
nOperating instructions
The regulation valve C 7700 is often supplied as a module together with
the flow meter. The flow meter is described in a separate document.
4.2 Design
4.2.1 Structure of the device
Fig. 1: Structure of the device
Item Description
1Hand knob (in the picture without protective cap)
2Servo motor
3 Input
4 Output
Table 5: General Overview
4.3 Function description
Fig. 2: Functions of the device
The servomotor with a regulation bevel of 90° moves the regulator
eccentric (5). It converts the rotation movement into the stroke movement
of the valve spindle (4). A spring (3) pushes the valve spindle onto the
eccentric.
The actual regulating element is located at the lower end of the valve
spindle. Up to 2500 g Cl2/h can be achieved with a slotted nozzle (7) – a
shaft with a diagonal "U" shaped slot. A control cone is used for greater
capacity (6).
Both regulating elements are shaped in such a way that the flow
cross-section changes proportionally to the angle of rotation of the
eccentric. The valves have a linear steady state characteristic.
For manual dosing, it is possible to push the valve spindle on the hand
knob (1) to the top position and lock it in place with the slide lock (2). The
dosing is then set from the manual valve of the flow meter.
The housing of the regulation valve consists of two chambers, the
eccentric chamber (A) and the valve chamber (B). The medium is only
present in the valve chamber.
1
3
2
4
1
2
3
4
5
6
7
A
B

Product description
Rating plate
10 © Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
4.4 Rating plate
There is information on the equipment about safety or the product's way
of functioning. The information must stay legible for the duration of the
service life of the product.
Material:
Max. XXX l/h bei XX kg/h
Max. XXX l/h
XXXX V 50/60 Hz, IP65
XX/XXXX
S/N: XXXXXXXXXX
P/N:
Made in
Germany
*102A12345678*
*12345678012345*
C 7700
Lutz-Jesco GmbH 30900 Wedemark
Am Bostelberge 19 Germany
Fig. 3: Rating plate C 7700
Item Description
1Product name
2Components coming into contact with the media
3Max. dosing quantity
4Control signal
5Voltage supply
6Label showing conformity with applicable European
directives
7WEEE label
8Protection class
9Serial number
10 Part number
11 Month / year of manufacture
Table 6: Rating plate
11
10
9
2
3
4
1
5
6 7 8

Technical data 11
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
5 Technical data
Description Value
dosage range 80, 200, 500, 1000, 2500 g Cl2/h
4, 5, 10, 15, 25, 40, 60, 120, 200 kg Cl2/h
Operating pressure -1...0 bar
Required suction vacuum of the injector -0.25 bar
Valve pressure drop 0.15 bar
Material in contact with the media
up to 2500 g/h PVC / PVDF / PTFE / FPM
from 4 kg/h PVC / Silver / PTFE / FPM
Weight approx. 5.5 kg
Ambient temperature 0 – 55 °C (no direct sunlight)
Air humidity max. 95 %, non condensing
Table 7: Technical data

Dimensions
12 © Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
6 Dimensions
All dimensions in millimetres (mm).
86 66
IN
OUT
L1
L2
L3 162
240
130
174
80
Ø 7
Fig. 4: Dimensional drawing
Connection (IN / OUT) Dim. L1 Dim. L2 Dim. L3
Hose 8/12 mm 95 170 55
Hose 12/16 mm 95 181 66
Threaded connection DN15 / Ø20 95 187 75.5
Screw connection DN32 / Ø40 103 252 112.5
Screw connection DN40 / Ø50 103 247 128.5
Table 8: Dimensions

Installation
Installing the device 13
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
7 Installation
WARNING
Increased risk of accidents due to insufficient qualifica-
tion of personnel!
Chlorinators and their accessories must only be installed, operated
and maintained by personnel with sufficient qualifications. Insufficient
qualification will increase the risk of accidents.
ðEnsure that all action is taken only by personnel with sufficient and
corresponding qualifications.
ðPrevent access to the system for unauthorised persons.
NOTE
Damage to the system due to incorrect installation
The failure to observe installation instructions (e.g. use of unsuitable
tools, incorrect torque) can damage the system parts.
ðUse suitable tools.
ðNote the specified torque.
7.1 Installation location
The regulation valve is installed in the dosing device room. We do not
recommend installation in the same room as the chlorine gas supply.
The room must fulfil the following requirements:
nsecured against access by unauthorised persons,
nprotected against weather conditions,
nfrost-free,
npermissible ambient temperature adhered to (see Section 5
"Technical data" on page 11),
nroom of sufficient size to allow trouble-free assembly as well as
inspection and maintenance of the device at all times,
nan electrical connection is given,
nthe room can be ventilated well,
nthe room must comply with the locally valid prescriptions.
7.2 Installing the device
CAUTION
Danger of personal injury and material damage!
If the device is fixed with screws and no washers, it may fall and get
damaged.
ðTo fix it to the wall, use the large washers supplied in the scope of
delivery.
The device must be installed perpendicularly to a flat wall surface and
must be easily accessible for operation.
Precondition for action:
üA flat wall.
üThe mounting material is suitable for the wall.
Resources required:
@Water level
@Drill
@Fork wrench SW10
Perform the following working steps:
1. Hold the device against the wall. The motor points to the right and the
hand knob points upwards.
2. Mark the mounting point on the wall.
3. Drill in the marked holes and insert the rawlplug.
4. Secure the wall panel with the screws and washers included in the
scope of delivery.
üThe device is fitted on the wall.

Installation
Hydraulic installations
14 © Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
7.3 Hydraulic installations
7.3.1 Back-pressure regulator
The regulation valve requires a constant differential pressure in order to
work properly. This is why we recommend to use a back-pressure
regulator that compensates fluctuations in the injector vacuum. Exact
dosing is only possible with a back-pressure regulator.
The back-pressure regulator is not always a separate component. It is
often integrated into the dosing device or injector non-return valve.
Fig. 5: Installation with back-pressure regulator
Item Description
1Flow meter with manual regulation valve
2Automatic regulation valve
3Back-pressure regulator
4Injector with non-return valve
Table 9: Legend Fig. 5
7.3.2 Pipe length and nominal width
For instance, PVC-U pipes or PE hoses are used as vacuum lines.
The following nominal widths are recommended for the vacuum line
between dosing device and injector (max. pressure decrease: 25 mbar,
calculated at 0.75 bar (a) with 4x90° angles):
Mass flow
of chlorine
L2: Length of the vacuum line between the dosing
device and the injector
5 m 10 m 20 m 30 m 50 m 100 m
0.5 kg/hr DN 8 DN 8 DN 8 DN 8 DN 8 DN 8
1 kg/hr DN 8 DN 8 DN 8 DN 8 DN 8 DN 12
2 kg/hr DN 8 DN 8 DN 8 DN 12 DN 12 DN 12
2.5 kg/hr DN 8 DN 8 DN 12 DN 12 DN 12 DN 12
4 kg/hr DN 8 DN 12 DN 12 DN 12 DN 15 DN 15
5 kg/hr DN 12 DN 12 DN 12 DN 12 DN 15 DN 20
10 kg/hr DN 12 DN 15 DN 15 DN 20 DN 20 DN 20
15 kg/hr DN 15 DN 15 DN 20 DN 20 DN 20 DN 25
25 kg/hr DN 20 DN 20 DN 20 DN 25 DN 25 DN 32
40 kg/hr DN 25 DN 25 DN 25 DN 32 DN 32 DN 40
60 kg/hr DN 32 DN 32 DN 32 DN 32 DN 40 DN 40
120 kg/hr DN 40 DN 40 DN 40 DN 40 DN 50 DN 65
200 kg/hr DN 50 DN 50 DN 50 DN 50 DN 65 DN 65
Table 10: Recommended nominal widths between the dosing device and injector
1
2
3
4

Installation
Hydraulic installations 15
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
If the recommended nominal width for the pipe line is larger than the
connection of the device, fit pipes with the same size as the connection
straight onto the device and observe the recommended nominal width for
the large distance.
Fig. 6:
M
L
1
L
A L
B
L
C
L
2
L
D
Long vacuum lines
Item Meaning
aVacuum regulator
bDosing device
cInjector
LA-LD
Lines on the device connection
each approx. 0.5 m in the connection nominal
width
L1
Line between vacuum regulator and dosing device
(see separate instructions)
L2
Line in the nominal width in accordance with
Table 10
Table 11: Long vacuum lines
1
2
3

Installation
Completing the installation
16 © Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
7.3.3 Establish the hose connection
Precondition for action:
üThe device is fitted on the wall.
üThe transport protection on the connection has been removed.
Resources required:
@Sharp knife
Fig. 7: Establish the hose connection
Perform the following working steps:
1. Cut the hose (1) a at right angles.
2. Slide the union nut (2) onto the hose.
3. Slide the hose end onto the cone of the hose connection (3).
4. Tighten the union nut by hand.
5. Fix the hose to the wall.
üHose connected fitted.
7.3.4 Make the PVC seal connection.
Precondition for action:
üThe device is fitted on the wall.
üThe vacuum line is fixed with sufficient pipe clamps and meets the
connection in an un-tensioned state.
üAll parts are clean and dry.
üThe transport protection on the connection has been removed.
Resources required:
@Pipe cutter
@File or chamfer tool
@PVC adhesive and cleaning agent
@Non-fuzzing paper towels
Perform the following working steps:
1. Cut the PVC pipe at right angles. Make a chamfer on the pipe exterior
(approx. 3 mm x 20°).
2. Clean the pipe and the bushing with the cleaning agent recommend-
ed by the manufacturer of the adhesive.
3. Glue the pipe in the connection. Follow the instructions on the PVC
adhesive.
Fig. 8: Making the PVC seal connection
4. Mount the connection on the device. Ensure that the O-ring is fitted.
5. Tighten the union nut by hand.
6. Allow the bond to harden for at least 3 hours prior to the leak test.
üPVC seal connection made.
7.4 Completing the installation
The cable screw connections must be tightened after assembly in order
to ensure the IP protection class of the installation.All covers on the
device must be closed.All union nuts on the screw connections of the
piping are tightened by hand.
3 1 2

Installation
Installation plans 17
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
7.5 Installation plans
7.5.1 Proportional dosing without control circuit
Fig. 9: Installation example 1
Item Description
1Flow meter
2Automatic regulation valve
3Back-pressure regulator
4Signal converter (optional)
5Injector with non-return valve
6Flow meter of the water line
Table 12: Legend Fig. 9
The automatic regulation valve is connected directly to the flow meter
and doses in proportion to the water flow.The optional signal converter
can adjust the dosing rate depending on the usage process.
7.5.2 Dosing with closed control circuit
Fig. 10: Installation example 2
Item Description
1Flow meter
2Automatic regulation valve
3Back-pressure regulator
4Injector with non-return valve
5Controller for free chlorine
6Extracting sample water from the water line
Table 13: Legend Fig. 10
The measuring and control system records changes in the concentration
of the free chlorine and controls the regulation valve. The valve opens up
to the extent required for the setpoint of free chlorine to be reached in the
water line.
IF
1
2
3
4
5
6
1
2
3
4
5
6

Servomotors
Servomotor 3-point step
18 © Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
8 Servomotors
DANGER
Mortal danger from electric shock!
Improperly installed or damaged components in the electronics
installation can cause injury.
ðEnsure that all work on the electrical installation is performed by a
qualified electrician.
ðEnsure that all work on the electrical installation is performed in a
de-energised state.
ðEnsure that the power supply is secured with a fault current
protective circuit.
ðReplace damaged cables or components without delay.
The regulation valve C 7700 can be equipped with various servomotors.
This section describes the electrical connection for the various versions
and how they are operated.
8.1 Opening and closing the servomotor
Resources required:
@Philips screwdriver size Ph2
Open
Perform the following working steps:
1. Loosen the two screws on the cover.
2. Pull the cover towards the right.
üServomotor is open.
Fig. 11: Opening the servomotor
Close
Perform the following working steps:
1. Push the cover onto the motor from the right side.
2. Tighten the screws with approx. 0.5 Nm.
üServomotor is closed.
8.2 Servomotor 3-point step
8.2.1 Technical data
Description Value
Voltage supply 230 V ±10 %, 50/60 Hz ±5 %, optional:
115 V AC or 24 V AC (see rating plate)
Power consumption 7 VA
Protection class IP 65
Actuating time 30 s (optionally other times, see rating
plate)
Regulation signal 3-point step
Position feedback 0 - 1000 Ohm
Max. potentiometer load 0.3 W, loop current 2 mA
Regulation bevel 90°
Torque 10 Nm
Switching capacity of
relays (optional) Max. 2.5 A / 250 V AC
Table 14: Technical data
8.2.2 Circuit diagram and terminal connection
Fig. 12: Circuit board 3-point step
A
B
C
D
E

Servomotors
Servomotor 3-point step 19
© Lutz-Jesco GmbH 2017
Subject to technical changes.
170518
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
Item Description
ASL microswitch (valve closed)
BSR microswitch (valve open)
CMicroswitch outputs
DVoltage supply input
EFeedback potentiometer output
Table 15: Elements on the circuit board
Fig. 13: Circuit diagram for circuit board 3-point step
Terminal Function
PE Protective earth (on
housing)
Voltage supply
1 N Neutral conductor
2 L Close phase valve
3 L Open phase valve
4 L Closed end position
Voltage output
5 L Open end position
18 Resistance start
Feedback potentiom-
eter (observe max.
load)
19 Driver
20 Resistance end
N, B, A Used internally
Table 16: Terminal connection 3-point step
8.2.3 Limit switch adjustment
i
The servomotor in its delivery state is adjusted to a setting
range of 0-100%. A different setting is only useful in special
cases.
Before you change anything on the servomotor, check if the
counternut of the adjusting spindle is tightened securely.
Fig. 14: Limit switch
Item Description Function
NL Trigger cam left end position
Valve closed
SL Switch for left end position
NR Trigger cam right end position
Valve open
SL Switch for right end position
Table 17: Limit switch
Both trigger cams (NR, NL) move with the main shaft. You activate the
limit switches (SR, SL).The rotary selector switches can be adjusted by
hand without tools.
After adjusting the limit switches, the motor must move to both end
positions. This allows the slip coupling of the potentiometer to adjust
itself.
i
The regulation bevel of the motor is 90° for a dosing capacity
of 0-100%. If the regulation bevel is greater, the feedback
potentiometer will shift during operation.

Servomotors
Servomotor 4-20 mA
20 © Lutz-Jesco GmbH 2017
BA-20710-02-V05
Chlorine control valve C 7700 Operating instructions
8.3 Servomotor 4-20 mA
8.3.1 Technical data
Description Value
Voltage supply 230 V ±10 %, 50/60 Hz ±5 %, optional:
115 V AC or 24 V AC (see rating plate)
Power consumption 7 VA
Protection class IP 65
Actuating time 30 s (optionally other times, see rating
plate)
Regulation signal 4-20 mA (internal working resistance
250ohms)
Position feedback 4-20 mA (max. working resistance
500ohms)
Regulation bevel 90°
Torque 10 Nm
Switching capacity of the
fault signalling relay
Max. 125 V AC/DC
Max. 10 VA
Table 18: Technical data 4-20 mA
8.3.2 Circuit diagram and terminal connection
Fig. 15: Circuit board 4-20 mA
Item Description
ASR microswitch (valve open)
BSL microswitch (valve closed)
CFault signalling relay
Table 19: Elements on the circuit board
Item Description
DStatus display LEDs
EPotentiometer hysteresis
FSignal connections 20 mA input and output
GProgramming keys
HDIP switch operating mode Man/AUTO and operating direction
IVoltage supply input
Table 19: Elements on the circuit board
Fig. 16: Circuit diagram for circuit board 4-20 mA
Terminal Function
PE Protective earth (on
housing)
Voltage supply
N N Neutral conductor
L L Phase
51 -
Input 4-20 mA
These two signals
are located on a
shared potential
52 +
54 - Position feedback
4-20 mA
55 +
56
Relay "fault", NC,
open = fault
Interrupts in case of a
power failure due to
wire breakage,
control signal or
manual mode
57
All other terminals are used internally.
Table 20: Terminal connection 4-20 mA
A
C
B
D
E
F
G
I
H