The COMPUTHERM T70RF type switched-mode room thermostat is suitable to regulate the overwhelming majority of boilers and air conditioners available in Hungary. It can be easily connected to any gas boiler having a two-wire thermostat connection point and to any air conditioning apparatus or electrical apparatus, regardless of whether they have a 24 V or 230 V control circuit. The thermostat can be programmed according to specific needs so that the heating (cooling) system heats (cools) your home or office to the desired temperature at the specified times specified, and it contributes to the reduction of energy costs, in addition to providing comfort. A daily temperature program can be prepared for each day of the week, independently of each other. It is possible to set comfort or economy temperature for each hour of the day separately.
The device consists of two units. One of them is the portable control unit (thermostat), while the other unit is the receiver that controls the boiler. Because there is a wireless (radio-frequency) connection between the two units, no cable is required between the thermostat and the boiler. The two units have been tuned in the factory. The trouble-free operation is ensured by its own security code. The installation and connection of the receiver unit is described in Chapter 8. To increase the lifetime of the batteries, the thermostat will not transmit signals continuously. Instead it will repeatedly transmit the actual signal every 10 minutes. Therefore, the regulation of the heating or cooling will continue even after a blackout.
The portability of the thermostat offers the following advantages:
The effective range of the transmitter incorporated in the thermostat is approximately 100 m in open terrain. This distance may become considerably shorter within a building, especially when a metal structure, reinforced concrete or adobe wall stands in the way of radio waves. The simultaneous use of several COMPUTHERM room thermostats and one COMPUTHERM Q4 zone controller provides the possibility for the thermostats to also control a pump or a zone valve in addition to starting the heater or cooler. This way it is easy to divide a heating / cooling system into zones, thanks to which the heating / cooling of each room can be controlled separately, thus greatly increasing comfort. Furthermore, the zoning of the heating / cooling system will greatly contribute to the reduction of energy costs, as due to this only those rooms will be heated / cooled at any time where it is required.
The thermostat of the COMPUTHERM T70RF type device can be freely moved in your residence. It is reasonable to locate it in a room used regularly or for many hours per day so that it is in the direction of natural ventilation in the room but protected from drought or extreme heat (e.g. direct sunlight, refrigerator, chimney, etc). Do not use in wet, chemically aggressive or dusty environment. Its optimal location is 0.75 – 1.5 m above floor level. Can be placed on the holder or wall mounted.
IMPORTANT WARNING: If the radiator valves in your flat are equipped with a thermostatic head, adjust it to maximum temperature or replace the thermostatic head of the radiator valve with a manual control knob in the room where the room thermostat is to be located, otherwise the thermostatic head may disturb the temperature control of the flat.
Instert the batteries
To put the thermostat into service detach the wall-mounted supporting bracket from the thermostat then remove the battery compartment cover.
Insert the 2 alkaline batteries (AAA, type LR03) in the product box into the battery compartment according to the marked polarities.
Warning: Alkaline batteries may only be used for this appliance. Carbonzinc batteries known as durable or long life batteries and chargeable accumulators are not suitable for the operation of this appliance. The
Attention: After the batteries have been replaced the exact time and day should be readjusted as described in Chapter 2.3. but the apparatus will memorize the other settings. After the batteries have been installed, snap back the battery compartment cover and mount the thermostat, depending on the intended method of operation, onto its wall-mounted back panel or portable holder then press the
Attention: The thermostat has an automatic key lock function to prevent accidental modifications of settings!
The icon located on the right side of the display indicates that the keylock is turned on. To turn off the key lock, touch the button for 3 seconds and the icon disappears. Now you can freely use the touch keys of the thermostat until the automatic key lock is activated again. The key lock turns on 10 seconds after the last key has been touched, indicated by the appearance of the icon on the display.
Setting the current day, exact time and temperatures used during the operation
Calibrating the thermometer of the thermostat
You can calibrate the thermometer of the appliance (to correct the measured temperature). To enter the calibration menu, in the OFF state of the thermostat, press and hold the
Switch between heating and cooling modes
Switch between heating and cooling modes
You have the possibility to easily switch between heating (factory setting) and cooling modes. The output terminals NO and COM of the thermostat are closed below the set temperature in heating mode, and they are closed above the set temperature in cooling mode (taking the switching sensitivity into account). The closed position of the NO and COM connection points of the output relay is indicated by the appearance of the icon
To enter the switching mode menu, in the
The thermostat can be used in 5 different modes which satisfy customers’ needs.
Selectable modes
You can switch between modes by touching the
With the temperature adjustment buttons (
Depending on the change in the room and set temperature the thermostat controls (turns on or off) the heating/cooling system connected thereto. By default, the NO and COM contact pairs of the relay are open. The closed position of the NO and COM connection points of the output relay is indicated by the appearance of the
A brief introduction to programming
Programming means setting of switching times and the selection of temperature values (Comfort, Economy) assigned to them. The apparatus can be programmed for a period of one week. Its operation is automatic, repeating the preset switching process cyclically every seven days. The thermostat can be programmed for each hour of every day of the week separately, independently of each other. The preset Comfort or Economy temperature can be selected for each switching time. The temperature set for a given hour will remain valid until the start of the next hour, i.e. on a given day the temperature set for 11:00 a.m. will be maintained until noon, and the temperature set for noon will be maintained until 1:00 p.m. and so on.
Remark: Otherwise, from both a comfort and an energy-efficiency point of view, it is recommended to activate more than one switch for each day. Furthermore, it is advised that a comfort temperature is used only those times, when the room or building is in use, since every 1 °C decrease of temperature saves approximately 6% energy during a heating season.
Programming steps
Recommendations for creating a heating program
The average comfort needs of a person can usually be satisfied by a temperature of 19-21 °C during the night, and a temperature of 22-23 °C during the day. During that time of the day, when the family is at work or school, only a lower temperature is needed. As heating up and cooling down usually takes a long time, it is reasonable to set the start time of the switches 0.5-1 hour before the desired time of the modified temperature. The programmability of the thermostat provides a perfect solution for this.
The average lifetime of the batteries is 1 year. The thermostat indicates battery charge level (e.g.
Warning: Alkaline batteries may only be used for this appliance.
Carbon-zinc batteries known as durable or long life batteries and chargeable accumulators are not suitable for the operation of this appliance. The
RESETING THE THERMOSTAT TO ITS FACTORY DEFAULT SETTINGS
You can return all settings of the apparatus (set temperature [Comfort, Economy, Absence, Manual], set time, set date, weekly programming and calibration of thermostat) to their defaults.
To restore factory settings press the
WARNING: The device must be installed and connected by a qualified professional!
Before putting the thermostat into operation make sure that neither the receiver nor the apparatus to be connected to is not connected to the 230 V power network. Modifying the thermostat can cause electric shock or product failure.
Installation and connection of the receiver unit
The COMPUTHERM T70RF thermostat receiver unit should be mounted on the wall in a place protected against moisture, dust, chemicals and heat, in the vicinity of the boiler. When choosing the location of the receiving unit you should remember that bulky metal objects (e.g. a boiler, buffer tank, etc.) and metal building structures may have an adverse effect on propagation of radio waves. If it is possible, in order to ensure trouble-free
RF connection, we recommend that you install the receiving unit at a height of 1.5 to 2 m and at a distance of 1 to 2 m from the boiler or other bulky metal constructions. We recommend that you check reliability of RF connection at the place selected before installing the receiving unit.
ATTENTION: Do not install the receiver unit under the housing of the boiler or near hot pipes because it may damage the parts of the device or compromise wireless (radio-frequency) connection. To avoid electric shock, entrust a specialist with connecting the receiver unit to the boiler!
You can mount the receiver onto the wall by means of the screws provided. 230 V supply voltage should be applied to the receiver, and the power cable required for this procedure is available in the box of the product. This ensures power supply to the receiving unit but this voltage does not appear at the output connection points. The power cable can be connected to the receiver in any position thereof, and it is not necessary to pay attention to correct phase alignment. Earth connection is not needed because the product is fitted with double insulation. The receiver unit controls the boiler or air conditioner through a potentialfree alternating relay whose connection points are: NO, COM and NC. Connect the two connection points of the heating or cooling equipment to be controlled to the normally open NO and COM terminals of the relay, as shown on the below figure.
If you would like to operate an old boiler or any other device that has no connection points for thermostats, then the NO and COM connection points of the thermostat should be connected to the mains cable of the device, similarly as a switch would be connected.
ATTENTION: Always consider the loadability of the receiver unit and follow the manufacturer’s instructions of the heating or cooling equipment. The device must be installed and connected by a qualified professional!
The voltage appearing at terminals NO and COM depends only on the system being controlled, therefore the dimensions of the wire are determined by the type of the device to be controlled. The length of the wire is of no significance, the receiver unit may be installed either near the boiler or far away from it, but do not install it under the housing of the boiler. If the distance between the transmitter and receiver units is too large due to local circumstances and it makes the wireless (radio-frequency) connection unreliable, install the receiver unit nearer to the place of thermostat.
Putting into service and operation of the receiver unit
Connect the receiver unit to the 230 V electricity network. After a few seconds have elapsed, the wireless (radio-frequency) system (thermostat and receiver unit) tunes itself to the operating frequency. To try the system in heating mode, press the
LED signals of the receiver
The operating condition of the receiving unit is indicated by a LED as detailed below:
When the receiver fails to switch according to the switch signals of the thermostat while the location of the units is appropriate (see Chapters 1 and 8.1.) then the system needs to be retuned. To this end, the following steps should be performed:
In case of a successful tuning the receiver memorizes the security code of the thermostat which guarantees reliable and smooth operation of the two units. From then on the green LED on the receiver lights steadily, indicating normal operating conditions. The security code is not lost even in the event of a power failure and the connection will be re-established maximum 10 minutes after power supply to the receiver has been restored.
ATTENTION: Performing the steps of the tuning process on the thermostat generates a new security code which will be recognized by the receiver only after re-synchronization. With this in mind, do not repeat the steps of the tuning process on the thermostat without a reason after the two units have been tuned successfully.
If you accidentally press the button for 2 seconds and as a result the receiver enters the tuning mode then without a new tuning process the receiving unit will return to normal operations with the previous security codes after 1 minute has elapsed.
Manual control of the receiver unit
Pressing the M button for 2 seconds detaches the thermostat from the receiver and gives a heating/cooling command to the system connected thereto (closes NO and COM connection points), indicated by continuous flashing of the orange and green LEDs. In case of manual control the receiver does not receive the signals coming from the thermostat and gives a continuous heating/cooling command, regardless of the temperature set on the thermostat. By pressing the M button again for 2 seconds the receiver returns to the operation controlled by the thermostat.
When you think that your appliance is operating incorrectly or encounter any problem while the appliance is being used then we recommend that you read Frequently Asked Questions (FAQ) available on our website, where we collected the problems and questions that most frequently occur while our appliances are being used, along with the solutions there to: http://www.computherm.info/en/faq
The vast majority of the problems encountered can be solved easily by using the hints available on our website, without seeking professional help. If you have not found a solution to you problem, please pay a visit to our qualified service.
Warning: The manufacturer does not assume responsibility for any direct or indirect damages and loss of income occurring while the appliance is being used.
In addition to using modern temperature regulators, the following up-to-date regulation methods also contribute significantly to the improvement of the comfort provided by the heating network, the energy efficiency of the heating network and the coefficient of performance:
Total weight of the device: approx. 280 g (thermostat+receiver+holder) The COMPUTHERM T70RF type thermostat complies with the requirements of directives RED 2014/53/EU and RoHS 2011/65/EU.
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