VDH ALFA 71 S PI User Manual
    |
1User manualALFA 71 S PIThermostat.0-100CVDH doc. 080350 Version: v1.0 Date: 07-03-2008Software: ALFA71-S-PI 0-100 File: Do080350.WPD Range: 0/+100,0C* Installation.On the top side of the ALFA 71 S PI is shown how the sensors, power supply, relays and 0..10VdcSolid-State output has to be connected. After connecting the ALFA 71 S PI to the power supply, a selftest function is started. As this test is finished the measured temperature appears in the display.* Control.The ALFA 71 S PI thermostat can be controlled by four pushbuttons on the front.These keys are:SET - view / change the setpoint.UP - increase the setpoint.DOWN - decrease the setpoint.C - hidden push button above the SET key and behind C symbol.* Viewing setpoint.By pushing the SET key the setpoint appears in the display. The decimal point of the last display startsblinking. A few seconds after releasing the SET key the setpoint disappears and the measuredtemperature is shown again in the display.* Changing setpoint.Push the SET key and the setpoint appears in the display. Release the SET key. Now push the SETkey again together with the UP or DOWN keys to change the setpoint. A few seconds after releasingthe keys the measured temperature shows again in the display.* Status of the Relays.By pushing the hidden C key the display shows the status of the relays. Each display segment showsthe status of the relay output, showing 0=off and 1=on. The code 110 means relay 1 and 2 are on andrelay 3 is off.* Setting internal parameters.Next to the adjustment of the setpoint, internal settings can be made like differential, sensor-offset,setpoint range and the functions of the thermostat.Push the DOWN key more than 10 seconds, to enter the 'Internal Programming Menu'. In the leftdisplay the upper and lower segment are blinking. Over the UP and DOWN keys the requiredparameter can be selected (see table for the parameters).If the required parameter is selected, the value can be read-out by pushing the SET key. Pushing theUP or DOWN key to change the value of this parameter.If after 20 seconds no key is pushed, the ALFA 71 S PI changes to the normal operation mode. |
Related manuals for VDH ALFA 71 S PI
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine