GEM 4241 User manual

GEMÜ 4241
Combi switchbox
Operating instructions
EN
further information
webcode: GW-4241

All rights including copyrights or industrial property rights are expressly reserved.
Keep the document for future reference.
© GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
19.10.2023
www.gemu-group.com2 / 22GEMÜ 4241

Contents
1 General information ............................................. 4
1.1 Information .................................................... 4
1.2 Symbols used ................................................ 4
1.3 Warning notes ............................................... 4
2 Safety information ............................................... 5
3 Product description ............................................. 5
4 GEMÜ CONEXO .................................................... 7
5 Correct use .......................................................... 7
6 Order data ........................................................... 8
7 Technical data ..................................................... 9
8 Dimensions .......................................................... 11
9 Manufacturer's information .................................. 12
9.1 Delivery .......................................................... 12
9.2 Packaging ...................................................... 12
9.3 Transport ....................................................... 12
9.4 Storage ........................................................... 12
10 Assembly and installation .................................... 12
10.1 Preparations for installing the valve (linear
actuator) ........................................................ 12
10.4 Threaded adapter assembly (linear actu-
ator) ................................................................ 14
11 Pneumatic connection ......................................... 16
12 Electrical connection ........................................... 17
13 Manual override ................................................... 19
14 Troubleshooting .................................................. 19
15 Inspection and maintenance ............................... 19
16 Disassembly ........................................................ 20
17 Disposal .............................................................. 20
18 Returns ................................................................ 20
19 EU Declaration of conformity in accordance with
2014/34/EU (ATEX) ............................................. 21
GEMÜ 4241www.gemu-group.com 3 / 22

www.gemu-group.com4 / 22GEMÜ 4241
1 General information
1 General information
1.1 Information
- The descriptions and instructions apply to the standard ver-
sions. For special versions not described in this document
the basic information contained herein applies in combina-
tion with any additional special documentation.
- Correct installation, operation, maintenance and repair work
ensure faultless operation of the product.
- Should there be any doubts or misunderstandings, the Ger-
man version is the authoritative document.
- Contact us at the address on the last page for staff training
information.
1.2 Symbols used
The following symbols are used in this document:
Symbol Meaning
Tasks to be performed
Response(s) to tasks
– Lists
1.3 Warning notes
Wherever possible, warning notes are organised according to
the following scheme:
SIGNAL WORD
Type and source of the danger
Possible
symbol for the
specific
danger
Possible consequences of non-observance.
Measures for avoiding danger.
Warning notes are always marked with a signal word and
sometimes also with a symbol for the specific danger.
The following signal words and danger levels are used:
DANGER
Imminent danger!
▶Non-observance can cause death or
severe injury.
WARNING
Potentially dangerous situation!
▶Non-observance can cause death or
severe injury.
CAUTION
Potentially dangerous situation!
▶Non-observance can cause moderate
to light injury.
NOTICE
Potentially dangerous situation!
▶Non-observance can cause damage to
property.
The following symbols for the specific dangers can be used
within a warning note:

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Symbol Meaning
Danger of explosion!
Danger of explosion
2 Safety information
The safety information in this document refers only to an indi-
vidual product. Potentially dangerous conditions can arise in
combination with other plant components, which need to be
considered on the basis of a risk analysis. The operator is re-
sponsible for the production of the risk analysis and for com-
pliance with the resulting precautionary measures and re-
gional safety regulations.
The document contains fundamental safety information that
must be observed during commissioning, operation and main-
tenance. Non-compliance with these instructions may cause:
- Personal hazard due to electrical, mechanical and chemical
effects.
- Hazard to nearby equipment.
- Failure of important functions.
- Hazard to the environment due to the leakage of dangerous
substances.
The safety information does not take into account:
- Unexpected incidents and events, which may occur during
installation, operation and maintenance.
- Local safety regulations which must be adhered to by the
operator and by any additional installation personnel.
Prior to commissioning:
1. Transport and store the product correctly.
2. Do not paint the bolts and plastic parts of the product.
3. Carry out installation and commissioning using trained
personnel.
4. Provide adequate training for installation and operating
personnel.
5. Ensure that the contents of the document have been fully
understood by the responsible personnel.
6. Define the areas of responsibility.
7. Observe the safety data sheets.
8. Observe the safety regulations for the media used.
During operation:
9. Keep this document available at the place of use.
10. Observe the safety information.
11. Operate the product in accordance with this document.
12. Operate the product in accordance with the specifications.
13. Maintain the product correctly.
14. Do not carry out any maintenance work and repairs not de-
scribed in this document without consulting the manufac-
turer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
3 Product description
3.1 Construction
1
2
5
3
4
Item Name Materials
1 Housing cover PC
2 Housing base PPS
3 Electrical connection SS, PP
4 Adapter piece SS
5 Mounting kit, valve spe-
cific
SS, PP
Seals NBR
3.2 Description
The GEMÜ 4241 combi switchbox is suitable for mounting to
pneumatically operated linear actuators. The position of the
valve spindle is reliably electronically detected and fed back
via the play-free and non-positive mounting by means of a 2-
wire proximity switch (NAMUR). Integrated pilot valves enable
direct activation of the process valve connected to them.
3.3 Function
The GEMÜ 4241 combi switchbox indicates the current posi-
tion of the valve. When the valve is opened, the spindle in the
combi switchbox moves upwards and indicates that the valve
is OPEN using the communication interface. When the valve is
closed, the spring in the mounting kit presses the spindle in
the combi switchbox downwards and indicates that the valve
is CLOSED using the communication interface.
3 Product description

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3 Product description
3.4 Product label
Device version Design in accordance with order data
Item number Traceability number Serial number
Device-specific data
Year of manufacture
The manufacturing month is coded under the traceability
number and can be requested from GEMÜ. The product was
manufactured in Germany.

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4 GEMÜ CONEXO
Order variant
In the corresponding design with CONEXO, this product has
an RFID chip (1) for electronic identification purposes. The po-
sition of the RFID chip can be seen below. The CONEXO pen
helps read out information stored in the RFID chips. The CON-
EXO app or CONEXO portal is required to display this informa-
tion.
1
For further information please read the operating instructions
for CONEXO products or the CONEXO datasheet.
Products such as the CONEXO app, the CONEXO portal and
the CONEXO pen are not included in the scope of delivery and
need to be ordered separately.
5 Correct use
DANGER
Danger of explosion!
▶Risk of severe injury or death.
●Do not use the product in potentially
explosive zones.
●Only use the product in potentially ex-
plosive zones confirmed in the declara-
tion of conformity.
WARNING
Improper use of the product
▶Risk of severe injury or death.
▶Manufacturer liability and guarantee will be void.
●Only use the product in accordance with the operating
conditions specified in the contract documentation and in
this document.
The product with the special version X order option is inten-
ded for use in potentially explosive areas of zone 2 with
gases, mists or vapours and zone 22 with combustible dusts
in accordance with EU directive 2014/34/EU (ATEX).
The product has the following explosion protection marking:
ATEX
Gas: II 2G Ex ib IIB T4 Gb
Dust: II 2D Ex ib IIIC T120°C Db
EC type examination certificate: IBExU17ATEX 1160 X
Notified body: IBExU, No. 0637
IECEx
Gas: Ex ib IIB T4 Gb
Dust: Ex IIIC T120°C Db
Certificate: IECEx IBE 19.0017 X
The product has been developed in compliance with the fol-
lowing harmonised standards:
- EN 60079-0:2012+A11:2013
- EN 60079-11:2012
Use of the product is permissible in the following ambient
temperature ranges: 0°C to +40°C
For use in potentially explosive areas, the following
conditions or operation limits must be observed:
Special conditions of use
1. The special conditions of the Ex components used must
be observed.
2. The housing must be installed protected against mechan-
ical influences.
3. Layers of dust > 5 mm must be avoided.
5 Correct use

6 Order data
The order data provide an overview of standard configurations.
Please check the availability before ordering. Other configurations available on request.
Note: A valve specific mounting kit is required for assembly. For designing the mounting kit, the valve type, nominal size, control
function and actuator size must be stated.
Order codes
1 Type Code
Combi switchbox 4241
2 Fieldbus Code
Without 000
3 Accessory Code
Accessory Z
4 Housing material Code
PPS base, PC cover 01
5 Action Code
Single acting, with manual override 01
Double acting, with manual override 02
Single acting, without manual override E1
6 Electrical connection Code
M16 Skintop cable gland; connection diagram "N" 03
7 Pneumatic connection Code
G1/8 connection thread 01
Air supply 6 mm angled connection,
exhaust air 6 mm angled connection
04
Air supply 6 mm T-connection,
exhaust air 6 mm angled connection
05
7 Pneumatic connection Code
G1/8 connection thread
(for IP67 or piped air outlet)
E1
Air supply 6 mm angled connection,
exhaust air 6 mm angled connection
(for IP67 or piped air outlet)
E4
Air supply 6 mm T-connection,
exhaust air 6 mm angled connection
(for IP67 or piped air outlet)
E5
8 Switch Code
Proximity switch, 2-wire, NAMUR
P+F, NJ1,5-6,5-15-N-Y180094
N1
9 Connection diagram Code
NAMUR terminals OPEN/CLOSED
8 V NAMUR sensor; 24 V DC pilot valve
N1
NAMUR terminals OPEN/CLOSED
8 V NAMUR sensor; 12 V DC pilot valve
N2
10 Travel sensor version Code
Potentiometer, 75 mm length 075
11 Special version Code
ATEX (2014/34/EU), IECEx X
Order example
Ordering option Code Description
1 Type 4241 Combi switchbox
2 Fieldbus 000 Without
3 Accessory Z Accessory
4 Housing material 01 PPS base, PC cover
5 Action 01 Single acting, with manual override
6 Electrical connection 03 M16 Skintop cable gland; connection diagram "N"
7 Pneumatic connection E1 G1/8 connection thread
(for IP67 or piped air outlet)
8 Switch N1 Proximity switch, 2-wire, NAMUR
P+F, NJ1,5-6,5-15-N-Y180094
9 Connection diagram N1 NAMUR terminals OPEN/CLOSED
8 V NAMUR sensor; 24 V DC pilot valve
10 Travel sensor version 075 Potentiometer, 75 mm length
11 Special version X ATEX (2014/34/EU), IECEx
6 Order data
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7 Technical data
7.1 Medium
Working medium: Quality classes to DIN ISO 8573-1
Dust content: Class 3, max. particle size 5 μm, max. particle density 5 mg/m³
Pressure dew point: Size 1
Class 3, max. pressure dew point -20 °C
Size 2
Class 4, max. pressure dew point +3 °C
Oil content: Size 1
Class 3, max. oil concentration 1 mg/m³
Size 2
Class 5, max. oil concentration 25 mg/m³
7.2 Temperature
Ambient temperature: 0 to 50 °C
Media temperature: 0 — 50 °C
Storage temperature: 0 — 40 °C
7.3 Pressure
Operating pressure: 2 to 7 bar
Flow rate: 250 Nl/min
The applied pressure must not exceed the maximum control pressure of the process valve.
7.4 Product compliance
Machinery Directive: 2006/42/EC
Explosion protection: ATEX (2014/34/EU)
IECEx
ATEX marking: Gas: II 2G Ex ib IIB T4 Gb
Dust: II 2D Ex ib IIIC T120°C Db
EC type examination certificate: IBExU17ATEX 1160 X
Notified body: IBExU, No. 0637
IECEx marking: Gas: Ex ib IIB T4 Gb
Dust: Ex IIIC T120°C Db
Certificate: IECEx IBE 19.0017 X
7.5 Mechanical data
Installation position: Optional
Weight: 420 g
Protection class: IP 65 acc. to EN 60529
IP 67 acc. to EN 60529, is reached with piped air outlet
Stroke: 5 to 75 mm
GEMÜ 4241www.gemu-group.com 9 / 22
7 Technical data

7.6 Electrical data
7.6.1 2-wire proximity switch (NAMUR)
Supply voltage: 8 V DC
Current consumption: ≤ 0.1 mA (damped)
≥ 3 mA (undamped)
Electrical connection
type:
Connection thread: M16 x 1.5, WAF 19
Cable diameter: 4.5 to 10mm
Recommended wire cross section: 0.75 mm² x 8 cables
7.6.2 Pilot valve
Rated voltage: 24 V DC ±10 % (code N1)
12 V DC -5/+10 % (code N2)
Rated power: 0.5 W
Resistance: 1152 Ω ± 5 % (code N1)
288 Ω ± 5 % (code N2)
Duty cycle: Continuous duty
7.7 Intrinsically safe characteristic values
7.7.1 Proximity switch
Proximity switch: Ui = 16 V
Ii = 52 mA
Pi = 169 mW
Li = 50 µH
Ci = 30 nF
7.7.2 Pilot valve
Pilot valve, code N1: Ui = 30 V
Ii = 330 mA
Li negligible
Ci negligible
Pilot valve, code N2: Ui = 30 V
Ii = 330 mA
Li negligible
Ci negligible
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7 Technical data

8 Dimensions
142
Ø 90
14,5
86,5 26
11
SW 24
Square
Dimensions in mm
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8 Dimensions

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9 Manufacturer's information
9 Manufacturer's information
9.1 Delivery
●Check that all parts are present and check for any damage
immediately upon receipt.
The product's performance is tested at the factory. The scope
of delivery is apparent from the dispatch documents and the
design from the order number.
9.2 Packaging
The product is packaged in a cardboard box which can be re-
cycled as paper.
9.3 Transport
1. Only transport the product by suitable means. Do not drop.
Handle carefully.
2. After the installation dispose of transport packaging ma-
terial according to relevant local or national disposal regu-
lations / environmental protection laws.
9.4 Storage
1. Store the product free from dust and moisture in its ori-
ginal packaging.
2. Avoid UV rays and direct sunlight.
3. Do not exceed the maximum storage temperature (see
chapter "Technical data").
4. Do not store solvents, chemicals, acids, fuels or similar
fluids in the same room as GEMÜ products and their spare
parts.
10 Assembly and installation
1. Observe the national regulations and provisions.
2. Observe the installer provisions.
3. Lay cables securely and protect them from damage.
4. Connect open wire ends in a junction box with protection
class IP20 and higher or outside the EX area
10.1 Preparations for installing the valve (linear
actuator)
1. Move the actuator A into zero position (actuator vented).
2. Remove optical position indicator 2 and / or protective cap
1 from the actuator top.
A
12
10.2 Information on use in damp conditions
1
The following information is intended to help when installing
and operating the product in damp conditions.
1. Lay cables and pipework so that no condensate or rain
water that remains on the pipework / cables can enter the
cable glands or plugs of the product.
2. Check that all cable glands or plugs are positioned cor-
rectly
3. Check the sealing ring 1 for any damage and correct posi-
tioning before tightening the cover.

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10.3 Mounting kit assembly
Item Name Item Name
1 Spindle 7 Flange plate
2 Spring 8 Screws
3 Operating bush 9 Pressure disc*
4 Distance piece 10 O-ring*
5 O-ring 11 O-ring*
6 Adapter
* Included depending on version.
CAUTION
Pretensioned spring!
▶Damage to the device.
●Slowly release the tension in the spring.
CAUTION
Do not scratch the spindle!
▶A damaged spindle surface may cause failure of the
travel sensor.
1
4
1
2
3
1. Pull out the spindle
1.
2. Align the indentation of the distance
piece 4 to the spring and push it over
the spindle 1 using the spring 2 and fix
it in place using the operating bush 3.
5
6
3. Tighten the operat-
ing bush 3 by turning
it clockwise.
4. Affix the O-ring 5 and the adapter 6.
7
8
5. Attach the flange
plate 7
6. Screw the flange plate on tight using
screws 8 (1 – 1.5 Nm).
- Push in the spindle until it pushes against the spring and
then slowly release the pressure on the spring.
NOTICE
▶For some valves (e.g. GEMÜ 650 and GEMÜ 687) it is ne-
cessary to fit a pressure disc between the threaded ad-
apter and the actuator head. This is included in the re-
quired mounting kits, sometimes with an additional O-ring
(only GEMÜ 650 with normally open and double-acting
control function – code 2+3).
▶If the pressure disc does not have a groove for a seal, this
will already be inserted in the groove provided at the ad-
apter opening of the actuator head (e.g. GEMÜ 687 with
normally open control function – code 2).
10 Assembly and installation

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10 Assembly and installation
9
6
11
10
Insert the O-ring 11 (if in-
cluded) into the corresponding
groove on the adapter 6.
If included: Push the pressure
disc 9 over the adapter 6 and
insert the O-ring 10 in the in-
tended groove of the pressure
disc.
10.4 Threaded adapter assembly (linear actuator)
With some mounting kits, it is necessary to install a threaded
adapter as well. This threaded adapter is enclosed with the re-
quired mounting kits. Valves with a normally open and double
acting control function (code 2+3) also include additional O-
rings (1+2).
1
3
2
1. Move the actuator to the closed position.
2. Place O-rings 1 and 2 into threaded adapter 3.
3. Screw threaded adapter 3 into the actuator opening as far
as it will go and tighten.
10.5 Assembling the stroke limiter (linear actuator)
5
5
4
3
2
1
6
8
9
7.1
7.2
Option1 Option2
1. Screw distance piece 5 onto/
into actuator spindle 6.
2. Move the actuator to the
closed position.
3. Insert the O-ring 7.1 in the
stroke limiter 1.
4. Insert the O-ring 7.2 in the
washer 4.
5. Screw stroke limiter 1 with
nut 2, seal 3 and washer 4
into the actuator opening.
6. Set stroke limiter 1 to the re-
quired stroke.
7. Make sure that the minimum
stroke is reached.
8. Secure stroke limiter 1 with
nut 2.
Key
1 Stroke limiter 7.1
1)
7.2
1)
O-ring
2 Nut 8 Protective cap
3 1) Seal 9 Position indicator
4 1) Washer 10 Operating bush
5 2) Distance piece 11 Spindle
6 Actuator spindle 12 Travel sensor
1) Only available for valves with the NO and DA control functions.
2) Only included in required mounting kits. The design depends on
the valve.

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10.6 Assembling and installing the combi switchbox
DANGER
Danger of explosion
▶Risk of death or severe injury.
●Do not use the product as a step or
foothold.
●Prior to commissioning, ensure that
the cover is fully closed and that the
housing and the O-ring are not dam-
aged.
1. Move the actuator into the OPEN position.
2. Place the product as far as it will go into the actuator
opening, insert adapter 3 (see chapter 9.3) or stroke lim-
iter 1 (see chapter 9.4) and screw in clockwise against the
initial spring tension.
3. Use the spanner flat of the travel sensor to tighten the
product.
4. Turn the housing clockwise to align the pneumatic or elec-
trical connections.
5. Set the switch on the product.
CAUTION
Incorrect installation of the product.
▶Damage to the housing.
●Only tighten the product using the spanner flats provided
for this purpose.
10.7 Setting the switching positions
1
2
1. Press clamping
tie bar 1 in with a
screwdriver.
2. Turn the cover
anticlockwise to
open the bay-
onet fitting.
3. Remove cover 2.
3
4
5
6
Setting the upper switching
position:
Setting the lower switching
position:
4. Move the valve to the
OPEN position.
5. Squeeze and hold red
levers 3.
6. Push switch 4 on the
toothed bar into the de-
sired position.
7. Release red levers 3.
ðSwitch 4 engages.
ðThe upper switching
position is set.
8. Move the valve to the
CLOSED position.
9. Squeeze and hold red
levers 5.
10. Push switch 6 on the
toothed bar into the de-
sired position.
11. Release red levers 5.
ðSwitch 6 engages.
ðThe lower switching po-
sition is set.
12. Make the electrical connection (see “Electrical connec-
tion“, page17).
10 Assembly and installation

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11 Pneumatic connection
2
13. After completing the electrical connection, carefully pull
the connection cable taut.
14. Make sure that seal 1 is fitted correctly and is not dam-
aged.
15. Put on cover 2 so that the bayonet fitting is inserted cor-
rectly and turn cover 2 clockwise.
16. Restore the power supply.
17. To check that everything is working correctly, open and
close the valve and observe the signalling.
18. If the settings need to be readjusted, switch off power to
the product again and repeat the steps in "Setting the
switching positions".
11 Pneumatic connection
11.1 Standard, single acting
Connec-
tion
Designation Connection
size
1 Air supply connection P G 1/8
2 Working connection for process
valve A1
G 1/8
3 1) Venting connection R with silencer
(integrated housing ventilation)
G 1/8 2)
1) CAUTION
Reduction of the flow at the vent connection 3
▶Increased overpressure in the upper part of the hous-
ing
●Do not operate vent connection 3 with chokes, filters
or similar.
●Ensure that vent lines are always depressurised.
●Install vent lines free of tension and kinks.
2) only relevant for exhaust air duct and/or increase of protection
class
11.2 Standard, double acting
Connec-
tion
Designation Connection
size
1 Air supply connection P G 1/8
2 Working connection for process
valve A1
G 1/8
3 1) Venting connection R with silencer
(integrated housing ventilation)
G 1/8 2)

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Connec-
tion
Designation Connection
size
4 Working connection for process
valve A2
G 1/8
1) CAUTION
Reduction of the flow at the vent connection 3
▶Increased overpressure in the upper part of the hous-
ing
●Do not operate vent connection 3 with chokes, filters
or similar.
●Ensure that vent lines are always depressurised.
●Install vent lines free of tension and kinks.
2) only relevant for exhaust air duct and/or increase of protection
class
12 Electrical connection
DANGER
Danger of explosion
▶Risk of injury or death!
●Do not connect or disconnect when
connected to the power supply.
●Do not disconnect the device until the
power has been switched off or the
area has been classified as non-haz-
ardous.
DANGER
Danger of explosion
▶Risk of severe injury or death.
●Danger from sparking. Never discon-
nect the connection cables when live.
12.1 Potential equalization device
M4x6
Connecting the potential equalization device
1. Use a M4x6 screw to attach the potential equalization
device to the product.
ðPotential equalization device for metal housings in po-
tentially explosive areas: Minimum 4 mm².
2. Secure the connection against working itself loose.
12.2 Electrical connection
1. Run the connection cable through the Skintop cable gland.
2. Only strip the connection cable directly before the switch
mounting plate.
3. Lay the individual wires to the terminals.
4. Cut the individual wires to the appropriate length in order
to avoid having unnecessarily long cable loops.
5. Compress the individual wires with wire end ferrules.
6. Connect the individual wires to the terminals in accord-
ance with the connection diagram.
For the electrical connection (M12 plug), we recommend the
M12 connectors for EX areas from IFM, series ENC**A.
12 Electrical connection

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12 Electrical connection
The M12 plugs may only be assembled, connected and com-
missioned by trained personnel. The trained personnel must
have expertise in types of ignition protection, and regulations
and provisions for operating media in EX areas.
7. Securely lay the connection cables or ensure sufficient
tension relief.
8. Refer to the technical data and cable gland documentation
for details of the wire cross sections.
9. Protect the product and the cables from damage.
10. Only clean the product with an anti-static or damp cloth.
11. Only operate the product when it is fully assembled.
12. Only connect the product to intrinsically safe electric cir-
cuits that are approved with an EC type examination certi-
ficate and which do not exceed the maximum values of
the respective sensors for Ui, Ii, Pi, Ci and Li.
12.3 24 V DC pilot valve, ordering option Connection
diagram, code N1
12.3.1 Connection diagram
OPEN
1
2
4
3
5
6
24 V DC +
S1 S2
L+
L-
brbr
blbl
L+
L-
CLOSED
Pin Signal name
1 L+, OPEN switch
2 L-, OPEN switch
3 GND, solenoid valve actuation
4 L+, CLOSED switch
5 L-, CLOSED switch
6 24 V DC, solenoid valve actuation
12.4 12 V DC pilot valve, ordering option Connection
diagram, code N2
12.4.1 Connection diagram
1
2
4
3
5
6
12 V DC +
S1 S2
L+
L-
brbr
blbl
L+
L-
OPEN CLOSED
Pin Signal name
1 L+, switch S1 OPEN
2 L-, switch S1 OPEN
3 GND, control input
4 L+, switch S2 CLOSED
5 L-, switch S2 CLOSED
6 12 V DC, control input

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13 Manual override
The combi switchbox has a manual override which enables
manual operation of the process valve.
3
Activating the manual override:
Use a flathead screwdriver (maximum slot width of 6mm) to
screw in the manual override screw 3 clockwise as far as it
will go.
Deactivating the manual override:
Use a flathead screwdriver (maximum slot width of 6mm) to
unscrew the manual override screw 3 anticlockwise as far as
it will go.
NOTICE
▶Control air and the minimum pressure must be available
to use the manual override.
14 Troubleshooting
Error Error cause Troubleshooting
No stroke No mounting kit
available
Check mounting kit
Process valve
faulty
Replace process
valve
Wrong mounting kit
installed
Replace mounting
kit
No feedback Incorrect assembly Check assembly,
wiring and connec-
tion
Switch not set Set switch
Wrong mounting kit
installed
Replace mounting
kit
Voltage is not con-
nected
Connect voltage
Cover cannot be at-
tached
Sealing ring inser-
ted incorrectly
Insert sealing ring
correctly
Sealing ring dam-
aged
Replace sealing
ring
Cables protruding
over the edge of the
base
Check the cable
routing and shorten
the cables if neces-
sary
15 Inspection and maintenance
NOTICE
Exceptional maintenance work!
▶Damage to the GEMÜ product.
●Any maintenance work and repairs not described in these
operating instructions must not be performed without
consulting the manufacturer first.
The operator must carry out regular visual examination of the
products depending on the operating conditions and the po-
tential danger in order to prevent leakage and damage.
1. Have servicing and maintenance work performed by
trained personnel.
2. Wear appropriate protective gear as specified in plant op-
erator's guidelines.
3. Shut off plant or plant component.
4. Secure plant or plant component against recommission-
ing.
5. Depressurize the plant or plant component.
6. Actuate products which are always in the same position
four times a year.
7. Carry out inspection and maintenance for products in the
potentially explosive area to DIN EN 60079-17.
15.1 Spare parts
No spare parts are available for this product. If it is faulty,
please return it to GEMÜ for repair.
15.2 Cleaning the product
DANGER
Danger of explosion
▶Risk of death or severe injury.
●Danger from sparking. Only clean the
product with an anti-static or damp
cloth.
- Do not clean the product with a high pressure cleaning
device.
15 Inspection and maintenance

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16 Disassembly
16 Disassembly
1. Disassemble in reverse order to assembly.
2. Unscrew the electrical wiring.
3. Disassemble the product. Observe warning notes and
safety information.
17 Disposal
1. Pay attention to adhered residual material and gas diffu-
sion from penetrated media.
2. Dispose of all parts in accordance with the disposal regu-
lations/environmental protection laws.
3. Dispose of electronic components separately.
18 Returns
Legal regulations for the protection of the environment and
personnel require that the completed and signed return deliv-
ery note is included with the dispatch documents. Returned
goods can be processed only when this note is completed. If
no return delivery note is included with the product, GEMÜ
cannot process credits or repair work but will dispose of the
goods at the operator's expense.
1. Clean the product.
2. Request a return delivery note from GEMÜ.
3. Complete the return delivery note.
4. Send the product with a completed return delivery note to
GEMÜ.