Samson 5312-2 Service manual

Translation of original instructions
EB 5207 EN
Type5312-2 Frost Protection Thermostat
Edition September 2008

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 5207 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 5207 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 Technical data ............................................................................................3-1
3.2 Dimensions.................................................................................................3-2
4 Shipment and on-site transport ...................................................................4-1
4.1 Accepting the delivered goods .....................................................................4-1
4.2 Removing the packaging from the frost protection thermostat..........................4-1
4.3 Lifting the frost protection thermostat.............................................................4-1
4.4 Storing the frost protection thermostat...........................................................4-1
5 Installation.................................................................................................5-1
5.1 Installation conditions..................................................................................5-1
5.2 Preparation for installation...........................................................................5-1
5.3 Mounting the frost protection thermostat .......................................................5-1
5.4 Electrical connection....................................................................................5-2
6 Operation..................................................................................................6-1
7 Start-up .....................................................................................................7-1
8 Operation..................................................................................................8-1
9 Malfunctions ..............................................................................................9-1
9.1 Emergency action .......................................................................................9-1
10 Servicing..................................................................................................10-1
11 Decommissioning .....................................................................................11-1
12 Removal ..................................................................................................12-1
13 Repairs ....................................................................................................13-1
13.1 Returning the frost protection 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.....................................................................................16-1

4 EB 5207 EN

EB 5207 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
The Type5312-2 Frost Protection Thermostat is designed as a switching device 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 frost protection
thermostat is designed to operate under exactly dened conditions (e.g. switching point and
voltage). Therefore, operators must ensure that a frost protection thermostat is only used in
operating conditions that meet the specications at the ordering stage. In case operators
intend to use the frost protection thermostat in other applications or conditions than specied,
contact SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the
device 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 frost protection thermostat is 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 frost protection thermostat 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. According 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 5207 EN
Safety instructions and measures
Personal protective equipment
No personal protective equipment is required for the direct handling of the frost protection
thermostat. Work on the control valve may be necessary when mounting or removing the
device.
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.
Furthermore, the product may no longer meet the requirements for its intended use.
Safety features
No special safety features exist.
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.
Operators are obliged to provide these mounting and operating instructions to the operating
personnel and to instruct them in proper operation. Furthermore, operators must ensure that
operating 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 5207 EN 1-3
Safety instructions and measures
Referenced standards, directives and regulations
The Type5312-2 Frost Protection Thermostat fullls the requirements of the Directives
2014/30/EU and 2014/65/EU. The declaration of conformity includes information about
the applied conformity assessment procedure. The 'Certicates' section contains this declara-
tion of conformity.
The Type5312-2 Frost Protection Thermostat is 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)
uT5207 Type5312-2 Frost Protection Thermostat

1-4 EB 5207 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 frost protection thermostat is protected to prevent solid particles larger than 1mm
from entering. However, it is not protected against moisture (IP40).
Risk of bursting in pressure equipment.
Valves and pipelines are pressure equipment. Improper opening can lead to valve com-
ponents bursting.
ÎBefore starting any work on the control valve, depressurize all plant sections affect-
ed as well as the valve.
ÎDrain the process medium from all the plant sections affected and from the valve.
ÎWear recommended personal protective equipment. See associated valve docu-
mentation.

EB 5207 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 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.
WARNING
!
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 frost protection thermostat may
become covered with dirt or become illegible in some other way. As a result, hazards
may go unnoticed 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.

1-6 EB 5207 EN
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
!
Risk of damage to the frost protection thermostat due to the supply voltage exceed-
ing the permissible tolerances.
The Type5312-2 Thermostat is 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 Type5312-2 Thermostat must be mounted properly and depending on the type of
mounting.
Incorrect connection of the electrical power supply will damage the frost protection
thermostat.
The frost protection thermostat has terminals that are integrated in a circuit.
ÎObserve the tolerances of the technical data.

EB 5207 EN 2-1
Markings on the device
2 Markings on the device
2.1 Nameplate
SAMSON
Typ:
Ber.:
Schutzart:
3
1
4
2
5
1 Type
2 Set point range
3 Max. current
4 Supply voltage
5 Degree of protection

2-2 EB 5207 EN

EB 5207 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
Function
The Type5312-2 Frost Protection Thermostat
is a temperature monitor:
The changeover contact switches when the
temperature at the temperature sensor rises
above the adjusted set point. When the tem-
perature falls below the set point, the
changeover contact automatically switches
back.
The changeover contact responds to a capil-
lary breakage in the same way as when the
temperature falls below the set point.
Temperature
The frost protection thermostat is calibrated
for an ambient temperature of +22°C.
The switching point falls by 0.08%/K at
higher ambient temperatures.
The switching point rises at lower ambient
temperatures.
Note
3.1 Technical data
Type 5312-2
Function Temperature monitor (TM)
Set point range –10 to +12°C
Sensor
Length Approx. 6 m in length,
already sensitive in partial
ranges of approx. 0.3m
Material Copper capillary
Switching
differential
Approx. 1K
Switching point
accuracy
±0.12K
Temperature
Medium Max. +200°C
Housing –15 to +55°C
Switching element Microswitches with change-
over contact
Contact rating
At 24 to
250VAC
15 (8)A with resistive
load,
2A with cosφ= 0.6
At 24VAC Min. 150mA
Connecting cable
diameter
5 to 10mm
Max. wire
cross-section
2.5mm²
Degree of
protection
IP 40 according to
EN60529
Housing material Sheet steel
Weight 0.67kg

3-2 EB 5207 EN
Design and principle of operation
3.2 Dimensions
105
46.5
39.5
43
77
25
27
Ø 5.5
M20x1.5 Ø 41
112
27
22
55
M5
10
6
Fig.3-1: Dimensions in mm · Type5312-2

EB 5207 EN 4-1
Shipment and on-site transport
4 Shipment and on-site trans-
port
The work described in this section is only to
be performed by personnel appropriately
qualied to carry out such tasks.
4.1 Accepting the delivered
goods
After receiving the shipment, proceed as fol-
lows:
1. Compare the shipment received with the
delivery note.
2. Check the shipment for transportation
damage. Report any damage to
SAMSON and the forwarding agent (re-
fer to delivery note).
4.2 Removing the packaging
from the frost protection
thermostat
Do not remove the packaging until immedi-
ately before mounting and start-up.
1. Remove the packaging from the frost
protection thermostat.
2. Check scope of delivery (see Fig.4-1).
3. Dispose and recycle the packaging in ac-
cordance with the local regulations.
Note
1x Type5312-2 Frost Protection Thermostat
1x Document IP5207
(Important Product Information)
Alternatively:
Document EB 5207
Mounting and operating instructions
Fig.4-1: Scope of delivery
Transporting the frost protection thermostat
− Protect the frost protection thermostat
against external inuences (e.g. impact).
− Protect the frost protection thermostat
against moisture and dirt.
− Observe the permissible transportation
temperature of –30 to +80°C.
4.3 Lifting the frost protection
thermostat
Due to the low service weight, lifting equip-
ment is not required to lift the frost protection
thermostat.
4.4 Storing the frost protection
thermostat
Risk of thermostat damage due to improper
storage.
ÎObserve the storage instructions.
ÎAvoid long storage times.
ÎContact SAMSON in case of different
storage conditions or longer storage
times.
NOTICE
!

4-2 EB 5207 EN
Shipment and on-site transport
We recommend regularly checking the frost protection thermostat and the prevailing storage
conditions during long storage periods.
Storage instructions
− Protect the frost protection thermostat against external inuences (e.g. impact).
− Protect the frost protection thermostat against moisture and dirt.
− Make sure that the ambient air is free of acids or other corrosive media.
− Observe the permissible storage temperature from –15 to +55°C.
− Do not place any objects on the frost protection thermostat.
Note

EB 5207 EN 5-1
Installation
5 Installation
5.1 Installation conditions
Work position
If not described otherwise in the valve or
actuator documentation, the work position
for the thermostat is the front view looking
onto the operating controls.
Mounting position
The valve can be mounted in any desired
position.
5.2 Preparation for installation
Before mounting, make sure the following
conditions are met:
− The thermostat is not damaged.
Proceed as follows:
Lay out the necessary material and tools to
have them ready during mounting.
Risk of damage and impaired functioning
of the frost protection thermostat.
ÎDo not use the frost protection thermostat
together with corrosive media.
ÎDo not bend the capillary (bending
radius ≥5mm).
ÎMount the housing as close to the point
of measurement as possible since the
capillary is sensitive along its entire
length.
NOTICE
!
The temperature at the housing must be at
least as high as the adjusted temperature,
but not higher than +55°C.
5.3 Mounting the frost
protection thermostat
Wall mounting
1. Unscrew the enclosure cover.
2. Fasten the bottom section of the housing
onto the wall.
3. Route and secure the capillary.
Mounting clamps are required (not included
in the scope of delivery) to position the
capillary properly at the outlet of the heating
battery.
Note
Note

5-2 EB 5207 EN
Installation
5.4 Electrical connection
Risk of fatal injury due to electric shock.
ÎUpon installation of the electric cables,
you are required to observe the regula-
tions concerning low-voltage installations
according to DINVDE0100 as well as
the regulations of your local power sup-
plier.
ÎUse a suitable voltage supply which
guarantees that no dangerous voltages
reach the device in normal operation or
in the event of a fault in the system or
any other system parts.
ÎConnect the grounding conductor to the
PE terminal.
1. Insert the connecting cable through the
cable gland into the housing.
2. Connect the wires of the connecting ca-
ble to the terminals.
3. Route the grounding conductor to the PE
terminal inside the housing.
4. Close housing cover. Insert and tighten
screws.
2
1
4
Fig.5-1: Electrical connection
DANGER
!

EB 5207 EN 6-1
Operation
6 Operation
Adjusting the set point
ÎUse a screwdriver to set the temperature set point at the adjustment screw.
ÎRead the adjusted value off the scale.
Adjustment screw
Fig.6-1: Adjustment screw

6-2 EB 5207 EN