This document defines the properties of Micropelt’s maintenance free, intelligent thermostatic head MLR003FiEU61MLR00RiEU61-1207-1.1. This MLR003 is used for control of drinking water circulation valves in circulation strands heating radiators with standard valve connection M30x1.5 (Section 10).
MLR003FiEU61MLR00RiEU61-1207-1.1 is an 868MHz LoRaWAN CLASS-A wireless actuator operating in SF12BW125SF7BW125. LoRaWAN end-devices of Class A allow for bidirectional communications whereby each end-device’s uplink transmission is followed by two short downlink receive windows. The transmission slot scheduled by the end-device is based on its own communication needs with a small variation based on a random time basis (ALOHA-type of protocol). Class-A operation is the lowest power end-device system for applications that only require downlink communication from the server shortly after the end-device has sent an uplink transmission. Downlink communications from the server at any other time will have to wait until the next scheduled uplink. SF12 SF7 is using the longest shortest time-on-air operating to maximize the wireless communication rangenumber of end nodes operating on one gateway.
Each standard production MLR003FiEU61MLR00RiEU61-07-1211.1 unit has a unique DEVEUI, APPEUI (JOINEUI) and a randomly generated APPKEY. Device credentials are secret and will only be submitted with the product delivery. Questions related to device credentials can be sent to devicecredentials@micropelt.com.
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The actuator operates with a communication profile as further specified in Section 11. The default radio communication cycle is 10 minutes. Default operating mode is Setpoint Temperature Flow and Default Setpoint value is 57°C. Installation, activation and a successful join with the network server will immediately set the radio communication interval to every 10 seconds for an installation period of 5 minutes to provide rapid feedback. Temperature values are transmitted in both raw and corrected temperature formats.
The actuator has a built-in, valve-side temperature used with its internal p-type temperature controller to regulate the drinking water sensor to determine the flow pipe temperature. A controllable offset with Default flow sensor offset of +5°C has been added to compensate for the temperature drop between the hot water and the sensor element located in the actuator’s aluminum valve adapter.. The device transmits a variety of information to the control unit by sending an uplink (Section 7.1). The control unit responds by sending a downlink (Section 7.2).
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