GESTRA TRS 5-6 User manual
1
TRS 5-6
Installation Instructions 810378-05
Temperature Switch
TRS 5-6
GESTRA Steam Systems
EN
English
2
Contents
Usage for the intended purpose ..............................................................................................................4
Safety note .............................................................................................................................................4
Danger ...................................................................................................................................................4
Attention.................................................................................................................................................4
LV (Low Voltage) Directive and EMC (Electromagnetic Compatibility) .......................................................4
ATEX (Atmosphère Explosible).................................................................................................................4
Note .......................................................................................................................................................4
Important Notes
Page
Explanatory Notes
Scope of supply......................................................................................................................................5
Description .............................................................................................................................................5
Function .................................................................................................................................................5
Design....................................................................................................................................................5
TRS 5-6................................................................................................................................................12
Attention...............................................................................................................................................12
Tools.....................................................................................................................................................12
Key.......................................................................................................................................................12
Examples of Installation ........................................................................................................................13
Installation
TRS 5-6..................................................................................................................................................6
Corrosion resistance...............................................................................................................................7
Name plate/ marking ..............................................................................................................................7
Dimensions.............................................................................................................................................8
Technical Data
TRS 5-6..................................................................................................................................................9
Key.......................................................................................................................................................11
Design
TRS 5-6................................................................................................................................................10
Key.......................................................................................................................................................11
Functional Elements
3
Wiring
TRS 5-6................................................................................................................................................14
Attention...............................................................................................................................................14
Note .....................................................................................................................................................14
Tools.....................................................................................................................................................14
Key.......................................................................................................................................................14
Wiring diagram.....................................................................................................................................15
Check wiring ........................................................................................................................................18
Apply mains voltage..............................................................................................................................18
Contents - continued -
Commissioning
Page
Temperature limiter, safety temperature switching controller ................................................................18
Note .....................................................................................................................................................18
Operation
Danger .................................................................................................................................................19
Fault-finding list for troubleshooting......................................................................................................19
Operation Malfunctions
Danger .................................................................................................................................................20
Disposal................................................................................................................................................20
Decommissioning
TRS 5-6................................................................................................................................................18
Performance test
Note on the Declaration of Conformity / Declaration by the Manufacturer ........................................21
Annex
Basic Settings
Adjusting temperature limit...................................................................................................................16
Example 1 ...........................................................................................................................................16
Example 2 ...........................................................................................................................................16
Example 3 ...........................................................................................................................................16
Tools ....................................................................................................................................................16
Code switch settings ............................................................................................................................17
4
Important Notes
Danger
The terminal strip of the equipment is live during operation.
This presents the danger of electric shock.
Cut off power supply before mounting or removing the terminal strips
and the housing cover.
Usage for the intended purpose
The temperature switch TRS 5-6 serves as safety device in plants requiring official approval and is used
in conjunction with resistance thermometers TRG 5-53, TRG 5-54, TRG 5-55 and TRG 5-57. Use the
temperature switch only for signalling temperature limits.
Safety note
The equipment must only be installed and commissioned by qualified and competent staff.
Retrofitting and maintenance work must only be performed by qualified staff who – through adequate
training – have achieved a recognised level of competence.
Attention
The name plate specifies the technical features of the equipment. Note that any piece of
equipment without its specific name plate must neither be commissioned nor operated.
ATEX (Atmosphère Explosible)
According to the European Directive 94/9/EC the equipment must not be used in potentially explosive
areas.
Note
The temperature sensors TRG 5-53, TRG 5-54, TRG 5-55 and TRG 5-57 are simple items
of electrical equipment as defined in EN 60079-11 section 5.7. According to the European
Directive 94/9/EC the equipment must be equipped with approved Zener barriers if used
in potentially explosive areas. Applicable in Ex zones 1, 2 (1999/92 EC). The equipment
does not bear an Ex marking. The suitability of the Zener barriers is certified in a separate
document.
LV (Low Voltage) Directive and EMC (Electromagnetic Compatibility)
The equipment meets the requirements of the Low Voltage Directive 2006/95/EC and the EMC Directive
2004/108/EC.
5
Description
High-integrity self-monitoring temperature switch with periodic self-checking routine to be used in
conjunction with a resistance thermometer type TRG 5-53, TRG 5-54, TRG 5-55 or TRG 5-57.
The equipment operates as a safety temperature monitor, or in combination with an external lock-out
in accordance with VDE 0116 as a safety temperature limiter. An alarm is given as soon as the tempera-
ture exceeds a preset limit. Application in steam boilers and pressurized hot-water plants operating
without constant supervision (TRD 604) as well as any other kind of heat generating units.
Explanantory Notes
Function
The temperature switch type TRS 5-6 is a two channel unit provided with an automatic periodic self-
checking logic unit, in accordance with DIN 3440/VDE 0116 (regulations on protection circuits for firing
equipment of furnaces). The two channels are designed to monitor the operation of each other. The
integrity of the resistance thermometer is continuously monitored by the TRS 5-6. Unless it finds a fault,
this internal test does not interfere with the output contacts of the temperature switch and therefore
the plant operation is not interrupted. A manual test push button is also provided. When the push button
“Test I” is pressed, it simulates a fault in the resistance thermometer There is also a toggle switch
“Test II / Inspection” for checking the function of the self-checking circuitry. The output contact relays
of the temperature switch are of the normally close type and will therefore signal alarm condition in the
event of a mains failure. The temperature switch can signal the following three operating conditions:
nNormal operation (temperature within permissible range)
nAlarm (limit temperature exceeded)
nAlarm (fault in temperature switch or resistance thermometer)
A green LED indicates Power ON. Two red LEDs are illuminated if the temperature limit is exceeded or if
there is a system malfunction. The failure of one channel (loss of redundancy) is signalled by the light-
ing-up of one red LED. The combination of TRG 5-... and TRS 5-6 provides fail-safe protection against a
first fault, i.e. the system will still continue to provide the safety function even after the occurrence of a
first fault.
Design
TRS 5-6
Plug-in unit in plastic case for installation in contol cabinets. The terminals in the case are accessible
after loosening two screws and unplugging the unit from its base. Thanks to the code plug the equip-
ment cannot be connected inadvertently to wrong GESTRA equipment. The equipment may be clipped
onto a 35 mm supporting rail or screwed into position on a mounting panel.
Scope of supply
TRS 5-6
1 Temperature switch TRS 5-6
1 Installation manual
6
TRS 5-6
Technical Data
Type approval
DIN · STW (STB) · 985 07S
Input
3 terminals for the connection of one resistance thermometer (Pt 100):
TRG 5-5..., PN 40-160, Tmax 400 °C – 540 °C
Output
2 volt-free relay contacts. Max. contact rating with switching voltages of
24 V, 115 V and 230 V AC: 4 A resistive, 0.75 A inductive at cos ϕ0.5.
Max. contact rating with a switching voltage of 24 V DC: 4 A.
Contact material: silver, hard-gold plated.
Temperature range
30 °C to 540 °C, adjustable in steps of 2 °C via code switch.
Switching hysteresis
–3 °C
Indicators and adjustors
2 LED “Alarm”, 1 LED “Power”, 1 button “Test 1”, 1 toggle switch “Test 2 / Inspection”,
8 LEDs and 1 code switch for setting the temperature limit
Mains supply
230 V +/– 10 %, 50/60 Hz.
Special voltages 115 V +/– 10 %, 50/60 Hz or 24 V +/– 10 %, 50/60 Hz.
Power consumption
5 VA
Protection
TRS 5-6 b: IP 20 to DIN EN 60529
Admissible ambient temperature
TRS 5-6 b: 0 °C to 55 °C
Body materials
TRS 5-6 b:
Base ABS, black. Cover: Polystyrol, highly shock resistant, stone grey.
Front panel: Aluminium.
Weight
TRS 5-6 b: approx. 1.0 kg
Approvals
EC prototype approval PED Pressure Equipment Directive 97/23/EC, EN 12952-11, EN 12953-09:
Requirements made on limiting equipment for boilers.
TÜV type approval /
DIN CERTCO VdTÜV Bulletin “Wasserstand 100” (= Water Level 100) / DIN EN 14597
Requirements made on temperature conrollers, temperature monitors and
temperature limiters.
DIN registration number STW (STB) 985 07 S.
VdTÜV Bulletin 985.
7
Corrosion resistance
If the unit is used for the intended purpose, its safety is not impaired by corrosion.
Technical Data - continued -
Name plate/ marking
Fig. 1
Mains supply
Protection
External fuse
Equipment designation
8
Technical Data - continued -
Dimensions
Fig. 2
106 7
37.5
75
Fig. 3
158
95
9
Design
Fig. 6
2 3
4
Fig. 4 Fig. 5
°C
°C
256
64
32
16
8
4
2
30
T8
T7
T6
T5
T4
T3
T2
T1
T0
128
2 min
Inspection
Test II
Test I
Alarm
MAX
°C
TRS 5-6
MADE BY GESTRA
1
1
TRS 5-6
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
7
6
5
10
Functional Elements
TRS 5-6
MAX 55 C
MAX 95%
%
IP 20
"
9
0
!
§
1
ON 2345678
Fig. 7
$
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