Sentera Controls GTT-1 Service manual

Mounting and operating instructions
TEMPERATURE BASED
FAN SPEED CONTROLLER
POWER RANGE: 3,5—7,5 A
GTT-1

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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 5
OPERATIONAL DIAGRAM 5
WIRING AND CONNECTIONS 5
MOUNTING INSTRUCTIONS IN STEPS 6
OPERATING INSTRUCTIONS 7
VERIFICATION OF INSTALLATION 8
TRANSPORT AND STORAGE 8
WARRANTY AND RESTRICTIONS 8
MAINTENANCE 8
TEMPERATURE BASED FAN
SPEED CONTROLLER
GTT-1

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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 our technical
support or consult a professional.
TEMPERATURE BASED FAN
SPEED CONTROLLER
GTT-1

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PRODUCT DESCRIPTION
e GTT 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) and control the speed of fans in automatic or
manual mode (in five steps) according to the temperature input of the integrated
flying lead sensor or according to the manual selection.
ARTICLE CODES
Article code Rated max. current [A] Fuse (5*20 mm) [A]
GTT-1-35L22 3,5 A T 5,0 A-H (5*20 mm)
GTT-1-50L22 5,0 A T 8,0 A-H (5*20 mm)
GTT-1-75L22 7,5 A T 12,5 A-H (5*20 mm)
INTENDED AREA OF USE
■Speed control, according to a measured temperature, of single phase 230 VAC
motors (pumps and fans). Application field: greenhouses, stables, sheds
■For indoor use, surface mounted
■Clean air with non-aggressive, non-combustible gases
TECHNICAL DATA
■Supply voltage: 230 VAC / 50—60 Hz
■Maximum motor current (Imax): depends on the version (see article codes)
■Temperature control: 15—35 °C
■Hysteresis: 0,5 °C
■Proportional range: 5 °C
■7-step rotary switch: Off position + manual 5-step control + Auto mode
■Plug and play, no wiring needed
■Manual or automatic mode, selectable by switch
■Potentiometer for temperature setpoint selection (range 15—35 °C) in 1°C scale
■Two Schuko IP54 sockets for Euro plugs
■Integrated 1,5 m supply cable with Euro plug
■Integrated flying lead PT500 temperature probe
■Integrated external plate for easy wall fixing
■Enclosure: plastic (R-ABS, UL94-V0, grey RAL 7035)
■Protection standard: IP54 (according to EN 60529)
■Operating ambient conditions:
►Temperature: 0—35 °C
►Rel. humidity: 5—95 % rH (non-condensing)
TEMPERATURE BASED FAN
SPEED CONTROLLER
GTT-1

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STANDARDS
■Low Voltage Directive 2014/35/EC
■EMC Directive 2014/30/EC: EN 61326
■WEEE Directive 2012/19/ EC
■RoHs Directive 2011/65/EC
OPERATIONAL DIAGRAM
Automatic mode Manual mode
Tset
T,T,
°C
0 / OFF
U [VAC]
15 °C
0,5 °C
1 °C
35 °C
230
190
170
140
110
0123 45
Regulated output (U) Knob position
U [VAC]
0 / OFF
230
190
170
140
110
WIRING AND CONNECTIONS
Wiring and connections
2
13
45
1- Standard power supply
cable with Euro plug (length
1,5 m)
Power supply 230 VAC / 50—60 Hz
2- 2 sockets in parallel for
load connection
Output voltage
OFF + 5 steps
110 / 140 / 170 / 190 / 230 VAC
(80 VAC, optional)
Min. load current 180 mA
3- Temperature sensor
probe
Cable length 4 m
Sensor type PT500 (500 Ω at 0 °C)
Sensor measuring range -30—70 °C
4- Temperature setpoint
potentiometer Operating range 15—35 °C
5- 7-position switch
0Off position
1—5 Manual fan speed selection
auto Automatic mode
6- Connections Cable gland clamping ranges 3—6 mm / 8—13 mm
Caution: When choosing a controller it is important to know the maximum current on the taps. Make sure you have chosen the right controller. You can take the
indicated rated maximum current from each transformer tap.
ATTENTION Make sure you use cables with an appropriate diameter to connect the fans to
the GTT-1 controller.
TEMPERATURE BASED FAN
SPEED CONTROLLER
GTT-1

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MOUNTING INSTRUCTIONS IN STEPS
Before you start mounting the GTT-1, read carefully “Safety and Precautions”and
follow these steps. Choose a smooth solid surface for installation (a wall, panel, etc.).
Follow these steps:
1. Drill holes into the surface and secure the fastenings (hooks, wall plugs, etc.)into
them. Mind the correct mounting position and unit mounting dimensions. (See
Fig. 1 Mounting dimensions and Fig. 2 Mounting position.).
2. Pay attention to the following instructions in order to minimize the operating
temperature:
2.1 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.
2.2 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.
2.3 If maximum ambient temperature cannot be adhered to, please provide
extra forced ventilation / cooling.
2.4 Leave sufficient space around the unit (for load connecting to the sockets).
Allow at least 90—100 mm for connection maintenance (to insert plug/
plugs into the sockets).
Not respecting the abovelisted rules can reduce service life and relieves the
manufacturer of any responsibilities.
ATTENTION It is recommended to install appropriate protective circuit on the input as
this transformer controller is not internally short-circuit proof. Recommended
automatic circuit breaker with “C” characteristics should be selected according to
the transformer rated maximum current.
ATTENTION Do not install the controller above heating equipment.
Fig. 1 Mounting dimensions Fig. 2 Mounting position
215
199
280 310 320
140 140
Correct Incorrect
6
50
4x ø6
166 50
90
294
6
3. Fix the unit onto the wall / panel.
ATTENTION A safety isolator / disconnect switch should be installed on the mains electricity
side of all motor drives.
NOTE e two Schuko sockets are intended only for connecting motors / fans. e total
load connected to both sockets must not exceed the rated maximum current of
the GTT-1 controller. Do not plug other types of electric appliances into them!
TEMPERATURE BASED FAN
SPEED CONTROLLER
GTT-1

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OPERATING INSTRUCTIONS
ATTENTION
5.
■Make sure the connections are correct before you power the unit.
■Make sure the mains supply voltage is within the admissible rated maximum
current of the product.
1. Switch off the mains power supply before connecting any power cables.
2. Plug load (fan) cables into the socket according to the connecting diagram.
ATTENTION Several fans can be connected in parallel to the controller as the maximum total
current of all must not exceed the current rating of the controller. Maximum 2
separate cable plugs can be connected to the sockets on the controller as the
parallel connections are made internally.
3. Install the PT500 temperature probe in an appropriate zone in order to measure
the relevant ambient temperature.
4. Plug the GTT-1 into the mains electricity network.
5. Select the operating mode by turning the control switch / knob on the right to
the relevant position (Fig. 3).
Fig. 3 Knob positions
a. Temperature set point selection b. Mode selection
280 310 320
280 310 320
5.1 Manual mode
e standard configuration of the output voltages is as indicated in Table
1below.
Output voltage
Knob
position 0 - 1 2 3 4 5 Auto mode
Regulated
output [VAC] 080* 110 140 170 190 230
According to
temperature
setpoint
Speed Off Low* Low Medium Medium Medium High
According to
measured
temperature
* Available but not connected.
5.2 Automatic mode
When Auto mode has been selected, the controller changes the five
speeds automatically according to the setpoint temperature selected via
the temperature potentiometer (Fig. 3a). e speed changes by increasing
/ decreasing the temperature by 1 °C and 0,5 °C fixed hysteresis (see the
operational diagram above).
TEMPERATURE BASED FAN
SPEED CONTROLLER
GTT-1

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TEMPERATURE BASED FAN
SPEED CONTROLLER
GTT-1
VERIFICATION OF INSTALLATION
ATTENTION Use only tools and equipment with non-conducting handles when working on
electrical devices.
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.
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.