VDH ALFANET 71 User Manual

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Description: Alfa(net) 71 12Vac 0/+100°C Pages: 8 Doc. No.: 170982Type: Manual By: BVDB Version: 1.0File: Do170982 ALFANET 71 0_+100°C FlashV10 EN.docxParaph: Date: 17-08-2017VDH Products BVUser manual ALFA(NET) 710/+100°C1 FunctionThe ALFA(NET) 71 is a panel mount thermostat-unit. The thermostat has also three relays outputsselectable for function cooling, heating or alarm. The temperature is measured by sensor-1 unlesssensor-2 is active as control sensor (P05=1), in this case the average temperature of both sensors(SM 811 2-wire) is displayed and used for control.The ALFANET 71 is provided with an RS-485 network connection allowing to read out and set thisunit on the ALFANET.2 InstallationOn the connection diagram of the ALFA(NET) 71 is shown how the sensor(s), power supply, relays,and optional network should be connected. After connecting the ALFA(NET) 71 to the power supply,a self-test program is started. As the test is finished the measured temperature appears in thedisplay.3 ControlThe ALFA(NET) 71 thermostat can be controlled by four pushbuttons on the front.These keys are;8 SET - view / change the set value and reset alarm.∏ UP - increase the set value.π DOWN - decrease the set value.°C STATUS - relay status key.