Samson 5343 Service manual

Translation of original instructions
EB 5206 EN
Thermostats
Type5343 · Type5344 · Type5345
Type5347 · Type5348 · Type5349
Edition March 2020
Type 5343 Safety Tem-
perature Monitor (STM)
Type5344 Temperature
Regulator (TR)
Type5345 Safety Tem-
perature Limiter (STL)
Type5347 Double Ther-
mostat (TR/STL)
Type5348 Double Ther-
mostat (TR/STM)
Type5349 Double Ther-
mostat (STM/STL)

Definition of signal words
Hazardous situations which, if not avoided,
will result in death or serious injury
Hazardous situations which, if not avoided,
could result in death or serious injury
Property damage message or malfunction
Additional information
Recommended action
DANGER
!
WARNING
!
NOTICE
!
Note
Tip
EB 5206 EN
Note on these mounting and operating instructions
These mounting and operating instructions assist you in mounting and operating the device
safely. The instructions are binding for handling SAMSON devices. The images shown in
these instructions are for illustration purposes only. The actual product may vary.
ÎFor the safe and proper use of these instructions, read them carefully and keep them for
later reference.
ÎIf you have any questions about these instructions, contact SAMSON‘s After-sales Service
([e-mail]).
The mounting and operating instructions for the devices are included
in the scope of delivery. The latest documentation is available on our
website at www.samsongroup.com > Service & Support > Downloads >
Documentation.

Contents
EB 5206 EN
1 Safety instructions and measures ................................................................1-1
1.1 Notes on possible severe personal injury ......................................................1-4
1.2 Notes on possible personal injury ................................................................1-5
1.3 Notes on possible property damage .............................................................1-6
2 Markings on the device ..............................................................................2-1
2.1 Nameplate .................................................................................................2-1
3 Design and principle of operation ...............................................................3-1
3.1 Single thermostat ........................................................................................3-1
3.2 Double thermostat .......................................................................................3-1
3.3 Testing according to DINEN14597 .............................................................3-2
3.4 Technical data ............................................................................................3-3
3.5 Dimensions .................................................................................................3-6
4 Shipment and on-site transport ...................................................................4-1
4.1 Accepting the delivered goods .....................................................................4-1
4.2 Removing the packaging from the thermostat ................................................4-1
4.3 Transporting the thermostat ..........................................................................4-1
4.4 Lifting the thermostat ...................................................................................4-1
4.5 Storing the thermostat .................................................................................4-1
5 Installation.................................................................................................5-1
5.1 Installation conditions ..................................................................................5-1
5.2 Preparation for installation ...........................................................................5-1
5.3 Mounting the contact thermostat ...................................................................5-2
5.4 Thermostat with thermowell ..........................................................................5-3
5.4.1 Wall mounting ............................................................................................5-3
5.4.2 Mounting on tanks or in pipes ......................................................................5-4
5.5 Electrical connection ....................................................................................5-6
5.6 Attaching the lead sealing ...........................................................................5-7
6 Operation..................................................................................................6-1
6.1 Temperature regulators (TR)..........................................................................6-1
6.2 Safety temperature monitors (STM) ...............................................................6-1
6.3 Safety temperature limiters (STL) ...................................................................6-1
7 Start-up .....................................................................................................7-1
8 Operation..................................................................................................8-1
8.1 Safety temperature monitors (STM) ...............................................................8-1
8.2 Temperature regulators (TR)..........................................................................8-1
8.3 Safety temperature limiters (STL) ...................................................................8-1

Contents
EB 5206 EN
9 Malfunctions ..............................................................................................9-1
9.1 Emergency action .......................................................................................9-2
10 Servicing..................................................................................................10-1
11 Decommissioning .....................................................................................11-1
12 Removal ..................................................................................................12-1
12.1 Contact thermostat ....................................................................................12-1
12.2 Wall mounting ..........................................................................................12-1
12.3 Thermostat mounted on the thermowell .......................................................12-2
13 Repairs ....................................................................................................13-1
13.1 Sending the thermostat to SAMSON ...........................................................13-1
14 Disposal...................................................................................................14-1
15 Certicates...............................................................................................15-1
16 Annex......................................................................................................16-1
16.1 Accessories ..............................................................................................16-1
16.2 After-sales service .....................................................................................16-2

EB 5206 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
The Types5343, 5344, 5345, 5347, 5348 and 5349 Thermostats are designed as switching
devices to open or close a circuit based on the temperature in heating, ventilation and air-
conditioning systems as well as in process engineering and industrial energy transfer
systems. The thermostats are designed to operate under exactly dened conditions (e.g.
switching point, voltage). Therefore, operators must ensure that a thermostat is only used in
operating conditions that meet the specications used for sizing the thermostat at the
ordering stage. In case operators intend to use a thermostat in applications or conditions
other than those specied, contact SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the de-
vice for its intended purpose or for damage caused by external forces or any other external
factors.
ÎRefer to the technical data for limits and elds of application as well as possible uses. See
the 'Design and principle of operation' section.
Reasonably foreseeable misuse
The thermostats are not suitable for the following applications:
− Use outside the limits dened during sizing and by the technical data
Furthermore, the following activities do not comply with the intended use:
− Use of non-original spare parts
− Performing service and repair work not described
Qualicationsofoperatingpersonnel
The thermostats must be mounted, started up, serviced and repaired by fully trained and
qualied personnel only; the accepted industry codes and practices must be observed. Ac-
cording to these mounting and operating instructions, trained personnel refers to individuals
who are able to judge the work they are assigned to and recognize possible hazards due to
their specialized training, their knowledge and experience as well as their knowledge of the
applicable standards.

1-2 EB 5206 EN
Safety instructions and measures
Personal protective equipment
No personal protective equipment is required for the direct handling of the thermostats.
Work on the control valve or pipeline may be necessary when mounting or removing the de-
vice.
ÎObserve the requirements for personal protective equipment specied in the valve docu-
mentation.
ÎCheck with the plant operator for details on further protective equipment.
Revisionsandothermodications
Revisions, conversions or other modications of the product are not authorized by SAMSON.
They are performed at the user's own risk and may lead to safety hazards, for example. Fur-
thermore, the product may no longer meet the requirements for its intended use.
Safety features
In the event of a capillary tube rupture, the changeover contact moves and stays permanently
in a position dened by its design. A safety temperature limiter (STL) is, in this case, in the
fail-safe position. It cannot be unlocked.
Warning against residual hazards
To avoid personal injury or property damage, plant operators and operating personnel must
prevent hazards that could be caused in the control valve by the process medium, the operat-
ing pressure, the signal pressure or by moving parts by taking appropriate precautions. Plant
operators and operating personnel must observe all hazard statements, warning and caution
notes in these mounting and operating instructions, especially for installation, start-up and
service work.
Responsibilities of the operator
Operators are responsible for proper use and compliance with the safety regulations. Opera-
tors are obliged to provide these mounting and operating instructions to the operating per-
sonnel and to instruct them in proper operation. Furthermore, operators must ensure that op-
erating personnel or third parties are not exposed to any danger.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions as
well as the specied hazard statements, warning and caution notes. Furthermore, operating
personnel must be familiar with the applicable health, safety and accident prevention regula-
tions and comply with them.

EB 5206 EN 1-3
Safety instructions and measures
Referenced standards, directives and regulations
The Types5343, 5344, 5345, 5347, 5348 and 5349 Thermostats with a CE marking com-
ply with the requirements of the Directives 2014/30/EU and 2014/35/EU.
The Types5343, 5344, 5345, 5347 and 5348 Thermostats with an EAC marking comply
with the requirements of the Regulations TR CU 004/2011 and TR CU 020/2011.
The 'Certicates' section contains this declarations of conformity and TR CU certicate.
The Types5343, 5344, 5345, 5347, 5348 and 5349 Thermostats are designed for use in
low voltage installations.
ÎFor wiring, maintenance and repair, observe the relevant safety regulations.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
uT5200 (Information Sheet: Temperature Sensors and Thermostats)

1-4 EB 5206 EN
Safety instructions and measures
1.1 Notes on possible severe personal injury
DANGER
!
Risk of fatal injury due to electric shock.
ÎBefore connecting wiring, performing any work on the device or opening the de-
vice, disconnect the supply voltage and protect it against unintentional reconnec-
tion.
ÎOnly use power interruption devices that can be protected against unintentional re-
connection of the power supply.
ÎDo not remove any covers to perform adjustment work on live parts.
The thermostats are protected against spray water (IP54).
ÎAvoid jets of water.
Risk of bursting in pressure equipment.
ÎBefore starting any work on the thermostat, depressurize all plant sections affected
as well as the valve.
ÎDrain the process medium from all the plant sections affected.
ÎWear appropriate personal protective equipment (safety gloves, goggles etc.).

EB 5206 EN 1-5
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Risk of burn injuries as a result of touching hot or cold components.
Thermostats installed in pipelines as well as the surrounding pipes, valves and other
components may be hot or cold.
ÎBefore performing any work on the device, shut off the medium ow.
ÎAllow devices to cool down or warm up to the ambient temperature.
ÎWear personal protective equipment that is suitable for the purpose.
Risk of personal injury through incorrect operation, use or installation as a result of
information on the thermostat being illegible.
Over time, markings, labels and nameplates on the thermostat may become covered
with dirt or become illegible in some other way. As a result, hazards may go unno-
ticed and the necessary instructions not followed. There is a risk of personal injury.
ÎKeep all relevant markings and inscriptions on the device in a constantly legible
state.
ÎImmediately renew damaged, missing or incorrect nameplates or labels.
Note
Riskofllerliquidescapingwhenthecapillarytubeisdamaged.
Filler liquid can ow out of the device when the capillary tube is damaged through
bending or rupture. There is no risk of personal injury.
Any ller liquid that escapes is not toxic nor acts as an irritant. It only poses a low
aquatic hazard. To date, health authorities have not issued any health hazard or restric-
tions concerning the short-term exposure to low concentrations of the liquid.
ÎNo special action required.

1-6 EB 5206 EN
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
!
Risk of damage to the thermostat due to the supply voltage exceeding the permissi-
ble tolerances.
The Types5343, 5344, 5345, 5347, 5348 and 5349 Thermostats are designed for
use according to regulations for low-voltage installations.
ÎObserve the permissible tolerances of the supply voltage.
Risk of thermostat damage due to incorrect mounting.
The Types5343, 5344, 5345, 5347, 5348 and 5349 Thermostats must be mounted
properly and depending on the type of mounting.
Risk of thermostat failure due to a damaged capillary tube.
The thermostat is permanently damaged when the capillary tube of thermostat is bent or
cut.
ÎDo not bend the capillary tube.
ÎDo not cut the capillary tube.
Risk of damage to the thermostat due to turning the set point adjuster too far.
The temperature set point can be adjusted manually at the thermostat. The thermostat
will be damaged if the set point adjuster is turned beyond one of its two end stops.
ÎDo not turn the set point adjuster past its end stops.
Incorrectconnectionoftheelectricalpowersupplywilldamagethethermostat.
The thermostats have terminals that conduct electricity and are integrated into a circuit.
ÎDo not apply the voltage (L and N) to terminals 1/2 or 1/4.
ÎObserve the tolerances of the technical data.

EB 5206 EN 2-1
Markings on the device
2 Markings on the device
2.1 Nameplate
1
2
46
9
5
11
7
8
3
12
10
1 Type
2 Conguration ID
3 Temperature measuring range
4 Perm. voltage of NC contact
5 Perm. voltage of NO contact
6Max. current of NC contact
7 Max. current of NO contact
8 Degree of protection
9 Max. perm. temperature for housing
10 Serial number
11 DIN registration no.
12 Year of manufacture

2-2 EB 5206 EN

EB 5206 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
3.1 Single thermostat
The thermostat is equipped with a change-
over contact. When the thermostat is trig-
gered, the connection between connections 1
and 2 are interrupted and the connections 1
and 4 are connected (see the 'Installation'
section).
Safety temperature monitors (STM)
A snap-action switch in the STM is triggered
when the temperature at the temperature
sensor rises above the adjusted set point.
When the temperature falls below the set
point by approximately 8K, the switch re-
turns to its original position.
The changeover contact interrupts the con-
nections 2 and 4 and connects the connec-
tions 1 and 2 when the temperature at the
temperature sensor falls below –20 °C. It au-
tomatically returns to the original position as
soon as the temperature at the temperature
sensor rises above –20 °C again.
The STM is triggered when the capillary tube
breaks.
Temperature regulators (TR)
The snap-action switch is triggered when the
temperature at the temperature sensor rises
above the adjusted set point. When the tem-
perature falls below the set point by approxi-
mately 4K, the switch returns to its original
position.
Safety temperature limiters (STL)
The snap-action switch is triggered and
locked when the temperature at the tempera-
ture sensor rises above the adjusted set
point. When the temperature falls below the
set point by approximately 10%, the
snap-action switch can be unlocked manual-
ly.
The changeover contact interrupts the con-
nections 2 and 4 and connects the connec-
tions 1 and 4 when the temperature at the
temperature sensor falls below –20 °C. The
STL automatically unlocks as soon as the
temperature at the temperature sensor rises
above –20 °C again.
The snap-action operation is triggered and
remains in this position in the event of a sys-
tem failure. It is not possible to unlock the
device in this case.
3.2 Double thermostat
Double thermostats are two thermostats that
work independently but share the same
housing. The principle of operation is the
same as that of the single thermostat. Each
thermostat has its own capillary tube.
The following combinations are possible:
− TR/STL
− TR/STM
− STM/STL

3-2 EB 5206 EN
Design and principle of operation
3.3 Testing according to
DINEN14597
The Types5343, 5344 and 5345 Thermo-
stats are tested by the German Technical In-
spectorate (TÜV) according to
DINEN14597. Tested versions are indicat-
ed on the nameplate.
Type DIN register number
5343 STW1209
5344 TR1208
5345 STB1207

EB 5206 EN 3-3
Design and principle of operation
3.4 Technical data
Table 3-1: General technical data · Types5343, 5344, 5345, 5347, 5348 and 5349
Singlethermostats:Type5343(STM),Type5344(TR),Type5345(STL)
Doublethermostats:Type5347(TR/STL),Type5348(TR/STM),Type5349(STM/STL)
Permissible ambient temperature
Transportation and storage –30 to +80°C
Service Max. 80°C
Pipe temperature when mount-
ed as a contact thermostat Max. 120°C
Sensor length/diameter 87mm/6mm
Capillary tube length 2000mm
Degree of protection IP 54 according to EN60529
Cable entry M20x1.5 cable gland, suitable for 6 to 12mm cable diameter
Minimum switching capacity AC/DC= 24V, 100mA
Maximum switching capacity
Temperature regulator (TR),
safety temperature monitor
(STM)
With 230VAC +10% NC contact: 16A (2.5); cosφ= 1 (0.6)
NO contact: 6.3A (2.5); cosφ= 1 (0.6)
With 230VDC +10% NC contact: 0.25A
NO contact: 0.25A
Safety temperature limiter
(STL)
With 230VAC +10% NC contact: 16A (2.5); cosφ= 1 (0.6)
Signal contact: 2A (2.5); cosφ= 1 (0.4)
With 230VDC +10% NC contact: 0.25A
Signal contact: 0.25A
Inuence of mean ambient
temperature based on the set point
A shift of the switching point arises when the ambient temperature at the
knob and at the capillary tube deviates from the calibration ambient tem-
perature of +22°C:
Higher ambient temperature g Lower switching point
Lower ambient temperature g Higher switching point
This inuence is minimized by temperature compensation.
Electrical connection Spring-cage terminals, 0.75 to 2.5mm² wire cross-section

3-4 EB 5206 EN
Design and principle of operation
Materials
Bottom section of the housing PA (reinforced)
Housing cover ABS with window (PMMA)
Temperature sensor, capillary
tube Cu (copper)
Weight Single thermostat approx. 0.225kg
Double thermostat approx. 0.45kg
Conformity
1)
Testing according to
DINEN14597 (Types5343, 5344
and 5345)
1) No EAC compliance for Type5349
Table 3-2: Technical data (depending on type)
Type Set point range Switching
differential Switchingpointaccuracy
Maximum
medium
temperature
Safety temperature monitors (STM)
5343-1 0 to 60°C 8K
Range: 0 to 25°C 0K –8.5K
85°CRange: 25 to 35°C 0K –6.0K
Range: 35 to 60°C 0K –8.5K
5343-2 40 to 100°C 8K Range: 40 to 100°C 0K –8.5K 125°C
5343-3 70 to 130°C 8K Range: 70 to 130°C 0K –8.5K 155°C
5343-4 35 to 95°C 8K Range: 35 to 95°C 0K –8.5K 120°C
Temperature regulators (TR)
5344-1 0 to 120°C 3K Range: 0 to 80°C +7.2K –7.2K 145°C
Range: 80 to 120°C +3.6K –3.6K
5344-2 20 to 150°C 4K Range: 20 to 106°C +7.8K –7.8K 175°C
Range: 106 to 150°C +3.9K –3.9K

EB 5206 EN 3-5
Design and principle of operation
Type Set point range Switching
differential Switchingpointaccuracy
Maximum
medium
temperature
Safety temperature limiters (STL)
5345-1 70 to 130°C 8K Range: 70 to 130°C 0K –8.5K 155°C
5345-2 30 to 90°C 8K Range: 30 to 90°C 0K –8.5K 115°C
DoublethermostatsTR/STL
5347-1
TR: 0 to
120°C 3K Range: 0 to 80°C +7.2K –7.2K
145°C
Range: 80 to 120°C +3.6K –3.6K
STL: 70 to
130°C 8K Range: 70 to 130°C 0K –8.5K
5347-2
TR: 0 to
120°C 3K Range: 0 to 80°C +7.2K –7.2K
115°C
Range: 80 to 120°C +3.6K –3.6K
STL: 30
to 90°C 8K Range: 30 to 90°C 0K –8.5K
DoublethermostatsTR/STM
5348-1
TR: 0 to
120°C 3K Range: 0 to 80°C +7.2K –7.2K
145°C
Range: 80 to 120°C +3.6K –3.6K
STM: 70 to
130°C 8K Range: 70 to 130°C 0K –8.5K
5348-2
TR: 0 to
120°C 3K Range: 0 to 80°C +7.2K –7.2K
125°C
Range: 80 to 120°C +3.6K –3.6K
STM: 40 to
100°C 8K Range: 40 to 100°C 0K –8.5K
DoublethermostatSTM/STL
5349-1
STM: 70 to
130°C 8K
Range: 70 to 130°C 0K –8.5K
145°C
STL: 70 to
130°C Range: 70 to 130°C 0K –8.5K

3-6 EB 5206 EN
Design and principle of operation
Table 3-3: Properties of the measuring uid
Dangerous reaction No
Ignition temperature 375°C
Water hazard Class 1, slightly contaminating
Toxicologicalspecications
Irritant No
Health hazard No
Toxic No
3.5 Dimensions
Single thermostats
Type 5343 Safety Temperature Monitor (STM) Dimensions with thermowell (accessories)
°C
120
150
53 42,4
Ø 6
22
Ø 4,5
95
1)
G ½
Ø 8
58
5
300
200 150 100
15
Fig.3-1: Dimensions in mm and inches · Type5343 Thermostat

EB 5206 EN 3-7
Design and principle of operation
Type5344TemperatureRegulator(TR) Dimensions with thermowell (accessories)
120
150
53 42,4 1)
22
Ø 4,5
95
Ø 6
Housing
without
thermowell
G ½
Ø 8
70
300
200 150 100
15
5
Type 5345 Safety Temperature Limiter (STL) Dimensions with thermowell (accessories)
°C
120
150
53 42,4
22
Ø 4,5
95
1)
Ø 6
Housing
without
thermowell
G ½
Ø 8
58
300 200 150 100
15
63
5
1) Metal plate and screw for fastening the thermostat onto the thermowell (wall mounting)
Fig.3-2: Dimensions in mm and inches · Types5344 and 5345 Thermostats

3-8 EB 5206 EN
Design and principle of operation
Double thermostats
Type5347DoubleThermostat(TR/STL) Dimensions with thermowell (accessories) Type5349DoubleThermostat(TR/STM) Dimensions with thermowell (accessories)
°C
120
150
106
95,4
22
Ø 4,5
95
1)
Ø 6
Housing
without
thermowell
G ½
Ø 15
70
100
150 300
5
°C
120
150
106
95,4
22
Ø 4,5
95
1)
Ø 6
G ½
Ø 15
100 150 300
63
58
5
Housing
without
thermowell
Type5348DoubleThermostat(TR/STM) Dimensions with thermowell (accessories)
°C
120
150
106
95,4
22
Ø 4,5
95
1)
Ø 6
Housing
without
thermowell
G ½
Ø 15
70
100
150 300
5
1) Metal plate and screw for fastening
the thermostat onto the thermowell
(wall mounting)
Fig.3-3: Dimensions in mm and inches · Types5347, 5348 and 5349 Double Thermostats