Sentera Controls STRS1 Series Service manual

Mounting and operating instructions
230 VAC TRANSFORMER
CONTROLLER WITH TK
POWER RANGE: 1,5—7,5 A
STRS1

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Table of contents
SAFETY AND PRECAUTIONS 3
PRODUCT DESCRIPTION 4
ARTICLE CODES 4
INTENDED AREA OF USE 4
TECHNICAL DATA 4
STANDARDS 4
OPERATIONAL DIAGRAM 5
WIRING AND CONNECTIONS 5
MOUNTING INSTRUCTIONS IN STEPS 6
VERIFICATION OF INSTALLATION 7
TRANSPORT AND STORAGE 8
WARRANTY AND RESTRICTIONS 8
MAINTENANCE 8
230 VAC TRANSFORMER
CONTROLLER WITH TK
STRS1

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SAFETY AND PRECAUTIONS
Read all the information, the datasheet, mounting and operating instructions and
study the wiring and connection diagram before working with the product. For
personal and equipment safety, and for optimum product performance, make sure you
entirely understand the contents before installing, using, or maintaining this product.
For safety and licensing (CE) reasons, unauthorised conversion and/ or modifications
of the product are inadmissible.
e product should not be exposed to abnormal conditions, such as: extreme
temperatures, direct sunlight or vibrations. Long-term exposure to chemical
vapours in high concentration can affect the product performance. Make sure the
work environment is as dry as possible; avoid condensation.
All installations shall comply with local health and safety regulations and local
electrical standards and approved codes. is product can only be installed by
an engineer or a technician who has expert knowledge of the product and safety
precautions.
Avoid contacts with energised electrical parts. Always disconnect the power
supply before connecting, servicing or repairing the product.
Always verify that you apply appropriate power supply to the product and use
appropriate wire size and characteristics. Make sure that all the screws and nuts
are well tightened and fuses (if any) are fitted well.
Recycling of equipment and packaging should be taken into consideration and these
should be disposed of in accordance with local and national legislation/regulations.
In case there are any questions that are not answered, please contact your
technical support or consult a professional.
230 VAC TRANSFORMER
CONTROLLER WITH TK
STRS1

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PRODUCT DESCRIPTION
e STRS1 series of transformer fan speed controllers regulate the rotational speed
of single-phase voltage controllable motors by varying the output voltage. ey are
equipped with auto-transformer(s), control the speed manually in five steps and
feature TK contacts for thermal motor protection. e used technology provides a
regulated output voltage with a perfect sinusoidal shape.
ARTICLE CODES
Article code Rated max. current [A] Fuse (5*20 mm) [A]
STRS1-15L22 1,5 (5*20 mm) F: T-2,5 A-H
STRS1-22L22 2,2 (5*20 mm) F: T-4,0 A-H
STRS1-25L22 2,5 (5*20 mm) F: T-4,0 A-H
STRS1-35L22 3,5 (5*20 mm) F: T-5,0 A-H
STRS1-50L22 5,0 (5*20 mm) F: T-5,0 A-H
STRS1-75L22 7,5 (5*20 mm)F: T-12,5 A-H
INTENDED AREA OF USE
■Speed control of voltage controllable 230 VAC single phase motors
■For indoor use only
TECHNICAL DATA
■Supply voltage: 230 VAC / 50—60 Hz
■Maximum motor current: depends on the version (see article codes)
■Unregulated output: 230 VAC
■TK for thermal protection of the motor
■5-step rotary switch for manual control plus off-position
■LED status indication
■Enclosure: plastic (R-ABS, UL94-V0, grey RAL 7035)
■Protection standard: IP54 (according to EN 60529)
■Operating ambient conditions:
►Temperature: -20—35 °C
►Rel. humidity: 5—95 % rH (non-condensing)
STANDARDS
■Low Voltage Directive 2014/35/EC
■EMC Directive 2014/30/EC: EN 61326
■WEEE Directive 2012/19/EC
■RoHs Directive 2011/65/EC
230 VAC TRANSFORMER
CONTROLLER WITH TK
STRS1

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OPERATIONAL DIAGRAM
L22 series
0123 45
230
190
170
140
110
U [VAC]
L1
Knob position
Regulated output (U)
Unregulated output (L1)
WIRING AND CONNECTIONS
STRS1-15L22, STRS1-22L22 and STRS1-25L22
Pe Earth terminal
LPower supply, phase (230 VAC / 50—60 Hz)
NPower supply, neutral
N1 Unregulated output, neutral
L1 Unregulated output, phase
URegulated output to motor, line
NRegulated output to motor, neutral
TK
ermal contact for motor protection
TK
STRS1-35L22, STRS1-50L22 and STRS1-75L22
MPower supply, phase (230 VAC / 50—60 Hz)
NPower supply, neutral
L1 Unregulated output, phase
NRegulated output to motor, neutral
URegulated output to motor, line
TK
ermal contact for motor protection
TK
Pe Earth terminal
ATTENTION Make sure you use cables with an appropriate diameter.
230 VAC TRANSFORMER
CONTROLLER WITH TK
STRS1

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MOUNTING INSTRUCTIONS IN STEPS
Before you start mounting the STRS1, read carefully “Safety and Precautions”and
follow these steps. Choose a smooth solid surface for installation (a wall, panel,
etc.).
Follow these steps:
1. Unscrew the front cover and open the enclosure. Mind the wires that connect
the rotary switch with the autotransformer or with the printed circuit board,
depending on the product version.
2. Fix the unit onto the wall or panel using the provided screws and dowels. Mind the
correct mounting position and unit mounting dimensions. (See Fig. 1 Mounting
dimensions and Fig. 2 Mounting position.)
3. Pay attention to the following instructions in order to minimize the operating
temperature:
3.1 Respect the distances both between the wall / ceiling and the device and
between two devices as shown in Fig. 2. In order to ensure sufficient
ventilation of the controller, clearance on every side has to be maintained.
3.2 When installing the device, please keep in mind that the higher you install
it, the warmer the device will get. For example, in a technical room the
correct installation height can be of great importance.
3.3 If maximum ambient temperature cannot be adhered to, please provide
extra forced ventilation / cooling.
Not respecting the abovelisted rules can reduce service life and relieves the
manufacturer of any responsibilities.
Fig. 1 Mounting dimensions Fig. 2 Mounting position
A
C
B
E
D
Article code A
[mm] B [mm] C [mm] D [mm] E [mm]
STRS1-15L22 115 205 100 98 140
STRS1-22L22 115 205 100 98 140
STRS1-25L22 170 255 140 155 194
STRS1-35L22 170 255 140 155 194
STRS1-50L22 170 255 140 155 194
STRS1-75L22 200 305 140 183 236
Correct Incorrect
50 mm50 mm
75 mm
50 mm
Wall
4. Insert the cables through the cable glands and do the wiring according to the
wiring diagram (see Fig. 3) while adhering to the information from section
“Wiring and connections” above.
4.1 Connect the power supply lines;
4.2 Connect the motor(s);
4.3 If applicable, connect the unregulated output. It can be used to supply a
230 VAC valve, lamp, etc. when the knob is not at ‘0’ position (see Table 1
below).
230 VAC TRANSFORMER
CONTROLLER WITH TK
STRS1

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4.4 Connect the contacts for TK monitoring for thermal motor protection
(terminals TK).
ATTENTION A safety isolator / disconnect switch should be installed on the mains electricity
side of all motor drives.
Fig. 3 Wiring and connections
STRS1-15L22, STRS1-22L22 and STRS1-25L22 STRS1-35L22, STRS1-50L22, STRS1-75L22
Pe LNN1 L1 U NTKTK
230 Vac MIN
230 VAC
OUT
230 VAC
L NL1N U
M
TK TK
ATTENTION
5.
Make sure the connections are correct before you power the unit.
5. Close the cover and secure it with the screws.
6. Turn the knob at ‘0’.
7. Tighten the cable glands.
8. Switch on the mains supply.
9. Make sure the transformer controller can operate normally (consider an isolating
switch).
10.Turn the knob into the relevant position to adjust the output voltage.
Optional settings
e standard configuration of the output voltages is as indicated in Table 1 below.
However, because more than 5 output voltages are available, it is possible to adjust
the 5 steps by changing the internal wiring.
Table 1 Voltage series
Knob position 0 - 1 2 3 4 5
Wires -
Regulated output [VAC]
Voltage 080* 110 140 170 190 230
Unregulated output [VAC]
L1 0 - 230 230 230 230 230
* Available but not connected.
VERIFICATION OF INSTALLATION
ATTENTION Use only tools and equipment with non-conducting handles when working on
electrical devices.
After connecting the unit to the mains supply, the green LED on its cover should light
up to indicate that the controller is supplied.
230 VAC TRANSFORMER
CONTROLLER WITH TK
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230 VAC TRANSFORMER
CONTROLLER WITH TK
STRS1
Safe operation depends on proper installation. Before start up, ensure the following:
■e mains supply is connected correctly.
■Protection is provided against electrical shock.
■e cables are the appropriate size and fuse-protected.
■ere is sufficient air flow around the unit.
e controller is equipped with TK terminals to connect to the thermal contact
integrated in the motor. When actuated (in case of an overheated motor), the
thermal contact cuts the voltage supply to the motor.
ATTENTION e unit is supplied with electrical energy at voltages high enough to inflict personal
injury or threat to health. Take the relevant safety measures.
ATTENTION Disconnect and confirm that there is no live current flowing to the unit before servicing.
ATTENTION Avoid exposing the controller to direct sunlight!
TRANSPORT AND STORAGE
Avoid shocks and extreme conditions; stock in original packing.
WARRANTY AND RESTRICTIONS
Two years from the delivery date against defects in manufacturing. Any modifications
or alterations to the product after the date of publication relieve the manufacturer
of any responsibilities. e manufacturer bears no responsibility for any misprints or
mistakes in this data.
MAINTENANCE
In normal conditions this product is maintenance-free. If soiled, clean with a dry or
damp cloth. In case of heavy pollution, clean with a non-aggressive product. In these
circumstances the unit should be disconnected from the supply. Pay attention that
no fluids enter the unit. Only reconnect it to the supply when it is completelydry.

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230 VAC TRANSFORMER
CONTROLLER WITH TK
STRS1