Watts Vision® RF Frequently Asked Questions
Date: 09.10.2019
General Information and Connectivity
Unité centrale Wifi (WiFi Central Unit)
Question: What is the estimated data traffic volume between the BT-CT02 WiFi RF and the App-Server?
Answer: Based on server traffic analysis, consider an average of 37.2 MB/day/central unit and 1154 MB/month/central unit. This figure depends on the heating system configuration; more peripherals mean more traffic between the central unit and the server.
Unité centrale, boîte de connexion RF (Central Unit, RF Connection Box)
Question: According to the manuals, one BT-CT02 RF (WiFi) can be connected to 4 masters to control up to 48 master zones (BT-M6Z02 RF/BT-S6Z02RF). If no extension (BT-S6Z02 RF slave) is used, would it be possible to connect to more than 4 masters, considering the maximum number of zones (48 or 50 zones)?
Answer: Yes, it is possible to connect more Master/Slave combinations. However, the maximum of 50 zones on the central unit must not be exceeded.
Module chaud et froid, boîte de connexion RF (Heating and Cooling Module, RF Connection Box)
Question: According to the manuals, 1 BT-HCM02 RF heating/cooling module can be linked to four master/slave BT-M6Z02 RF / BT-S06Z02 RF to control a 2-pipe heating and cooling system (heating and cooling with the same pipe/manifold, e.g., combined floor heating and cooling). Is the device also capable of controlling 4-pipe systems (heating and cooling via separate ducts and separate manifolds, e.g., floor heating and ceiling cooling)?
Answer: For separate control of ceiling cooling and floor heating, the connection boxes cannot be used. BT-WR02 HC RF receivers can be used because these systems do not use a manifold but an individual zone valve for the heating circuit and another for the cooling circuit.
Module chaud et froid, boîte de connexion RF, récepteur RF (Heating and Cooling Module, RF Connection Box, RF Receiver)
Question: How to control a combination of floor heating and ceiling cooling?
Answer: For separate control of ceiling cooling and floor heating, the connection boxes cannot be used. BT-WR02 HC RF receivers can be used because these systems do not use a manifold but an individual zone valve for the heating circuit and another for the cooling circuit.
Unité centrale (Central Unit)
Question: If the date and time are set to Auto, UTC is the reference time. What does this mean for the time zone setting?
Answer: Coordinated Universal Time (UTC) is the basis for global local time calculation. In France, consider UTC+2 in summer and UTC+1 for winter time.
Unité centrale, Funk-répéteur (Central Unit, Radio Repeater)
Question: How many BT-RPT02 RF signal repeaters can be linked to a central unit?
Answer: Multiple RF repeaters can be connected to a central unit. However, during installation, attention must be paid to a star topology. A repeater must communicate directly with the central unit and not use the signal from another repeater (signal transmission is impossible).
Récepteur RF (RF Receiver)
Question: Is there a minimum distance to be observed between several RF receivers installed in the same location?
Answer: A minimum distance between RF receivers is not necessary.
Thermostat RF, boîte de connexion RF, récepteur RF, Tête thermostatique RF, l'unité centrale (RF Thermostat, RF Connection Box, RF Receiver, RF Thermostatic Head, Central Unit)
Question: Is there a minimum distance between the different units (like RF thermostat, RF connection box, RF receiver, RF thermostatic head, and central unit) that must be observed during RF initialization or installation?
Answer: The distance between the RF transmitter (RF thermostat or central unit) and the RF receiver (RF receiver, RF connection box) must be at least 1 meter.
Récepteur RF (RF Receiver)
Question: What is the maximum voltage fluctuation that radio receivers can tolerate?
Answer: Refer to the manual. Voltage supply is usually 230 VAC ± 10%.
Tête thermostatique RF, thermostat RF, unité centrale (RF Thermostatic Head, RF Thermostat, Central Unit)
Question: Can an RF thermostatic head be connected directly to an RF thermostat?
Answer: No. If one or more RF thermostatic heads are to be connected to an RF thermostat, a central unit must be installed between the products. Direct connection between the RF thermostatic head and the RF thermostat is not possible to protect battery life. A direct connection would significantly shorten battery life.
Thermostat RF, récepteur RF encastrable avec sonde de sol (RF Thermostat, RF Flush-mounting Receiver with Floor Probe)
Question: Does the RF Thermostat need to measure the floor temperature using an external sensor?
Answer: An external temperature probe for measuring floor temperature must be connected to the flush-mounting receiver. In the installer menu, under advanced settings, select "FLr" or "FLL" for parameter #20. If these are not available, perform a reset (parameter #36). Radio pairing must be done again after resetting.
Thermostat RF, récepteur RF, unité centrale (RF Thermostat, RF Receiver, Central Unit)
Question: Is it possible to assign more than one zone to a wireless thermostat connected to a modular RF connection box?
Answer: Yes. Two or more zones can be paired with a single thermostat. Consequently, the number of wireless thermostats is reduced. A connection box can manage up to 6 zones. If necessary, an extension module from the BT-Sx series can extend the number of zones (4 or 6 additional zones).
Thermostat RF, boîte de connexion RF (RF Thermostat, RF Connection Box)
Question: It is possible to connect up to a maximum of 2 valves to each zone of a connection box. How can more valves be assigned to the same zone?
Answer: This is possible by associating two or more zones of the connection box with the same thermostat. Consequently, a wireless thermostat can control up to 12 valves (or 24 valves with the extension module).
Thermostat RF, récepteur RF, unité centrale (RF Thermostat, RF Receiver, Central Unit)
Question: In what order should the thermostats, RF receivers, and central unit be paired?
Answer: First, pair the thermostats with the central unit, then pair the RF receivers with the central unit.
Thermostat RF, Boîte de connexion RF, unité centrale (RF Thermostat, RF Connection Box, Central Unit)
Question: What should I pay attention to when installing RF thermostats, RF connection boxes, and the central unit?
Answer: For installations with an RF connection box and RF thermostats, first pair the RF thermostats to the connection box, then pair the connection box to the central unit.
RF-thermostat, récepteur RF (RF Thermostat, RF Receiver)
Question: An RF wireless thermostat BT-D02-RF (HR) is connected directly to a wireless receiver BT-FR02-RF with an additional external temperature probe also connected. However, the thermostat does not show the external probe's temperature values.
Answer: To read the temperature values from the radio thermostat, a central unit must be interposed, as there is only a one-way radio communication path between the thermostat and the radio receiver. Therefore, sensor values are not sent from the receiver to the thermostat and cannot be read. The thermostat displays the error message "Err" in the extended parameter menu #24. However, control is performed based on the values set on the wireless thermostat in the extended parameter menu #20, #25, and #26.
RF-thermostat, RF-récepteur, unité centrale (RF Thermostat, RF Receiver, Central Unit)
Question: How is the actual temperature from the BT-FR02 RF external sensor displayed?
Answer: Without a central unit: The temperature cannot be read by the wireless thermostat, as there is only a one-way wireless connection (see also the previous point). With a central unit: There is a bidirectional radio link. The sensor temperature can then be read from the central unit (in the corresponding room/zone) and from the BT-D02 RF or BT-DP02 RF radio thermostat in the extended parameter menu #24. If more than one BT-FR02 RF is combined, the last sent value is displayed by one of the recipients. Conscious request for a sensor value is made by pressing the RF button on the receiver.
Thermostat RF, récepteur RF, unité centrale (RF Thermostat, RF Receiver, Central Unit)
Question: How many radio receivers can be paired with a radio thermostat?
Answer: Without a central unit: In principle, an unlimited number of individual radio receivers can be connected to a radio thermostat. Radio communication is one-way; the wireless thermostat only sends ambient and setpoint temperatures, which are received and processed by a certain number of receivers. There is a limit with BT-FR02 concerning the external sensor (see also the previous point). With a central unit: Bidirectional communication is achieved by integrating the central unit. However, the number of radio receivers is limited (see system limits in the central unit's user manual).
Récepteur RF, unité centrale (RF Receiver, Central Unit)
Question: How is the BT-RPT02 RF signal repeater connected to a central unit?
Answer: After configuring the central unit (creating rooms and pairing products), the repeater must be paired in any room. Unfortunately, with CPU up to software version 3.05, the information "repeated coupling" appears. If the indicator light is permanently on in green after the pairing process on the repeater, the wireless pairing was successful! Even if the repeater is not visible as a device in the central unit, it is functional. This condition will be corrected with the next software version. Watts apologizes for any inconvenience.
Tête thermoistatique RF, unité centrale (RF Thermostatic Head, Central Unit)
Question: Is it possible to install multiple electronic RF thermostatic heads for radiators in a single room/zone, and how can they be connected to the central unit?
Answer: Yes, it is possible to install multiple electronic RF thermostatic heads in a room/zone of the central unit. If the setpoint temperature or heating mode is changed on one of the electronic heads, the information is transmitted to the central unit and then transmitted to the other associated electronic heads in the same zone.
Thermostat, récepteur RF, unité centrale (Thermostat, RF Receiver, Central Unit)
Question: The frost protection setpoint is factory-set. Can it be changed, and if so, how?
Answer: The frost protection setpoint can be adjusted on the radio thermostat in parameter menu #6 HG. Factory setting: 10°C, selectable range: 0.5 to 10°C.
Thermostat RF, récepteur RF (RF Thermostat, RF Receiver)
Question: In the central unit, the frost protection setpoint is factory-set to 7°C. Can this value be changed?
Answer: This value can be adjusted via the Installation menu >> Frost Protection setpoint. Adjustment range: 0.5 to 10°C. This value is adopted by all devices paired with the central unit.
Unité centrale (Central Unit)
Question: Is it possible to cancel the RF pairing between a radio receiver and a radio thermostat?
Answer: If a radio receiver has been paired with a radio thermostat, but another radio thermostat needs to be used, a reset must be performed on the radio receiver (press the RF button for approximately 15 seconds).
Unité centrale (Central Unit)
Question: How can I install another language on the central unit?
Answer: Download the software update files from www.wattswater.eu and save them to a Micro SD card. Insert the Micro SD card into the central unit; the Language menu will now display the newly installed languages (which overwrite the pre-installed ones).
Unité centrale (Central Unit)
Question: The display does not dim even if the screensaver function is activated.
Answer: Screen dimming only occurs between 10:00 PM and 7:00 AM. The screen remains on during the day, but the brightness is reduced.
