User manual ALFANET 71-2SP Thermostat with 2 set points
Contents
1. Control through push buttons on the front Front Polycarbonate IP65 Sensors 2x SM 811 2m PTC 10000 25 C Dimensions 35 x 77 x 71 5mm hwd Panel cut out 28 x 70mm hw Accuracy 0 5 from the range Provided with memory protection during power failure Equipped with self test function and sensor failure detection Connection with screw terminals Special version on request available Parameters ALFANET 71 2SP Para Description Parameter Range Default Meter value Function Relay 1 1 Cooling 1 2 Heating 3 Alarm Function Relay 2 1 Cooling 2 2 Heating 3 Alarm Function Relay 3 1 Cooling 3 2 Heating 3 Alarm 0 0 0 0 0 0 Function sensor 2 O Not present 1 Control 2 Alarm Offset temperature sensor 1 15 0 15 0 C Offset temperature sensor 2 15 0 15 0 C Relay 2 switches on 0 Temperature 1 Time Relay 3 switches on 0 Temperature 1 Time Switch on delay relay 2 0 99 min Switch on delay relay 3 0 99 min Switching differential relay 1 0 1 15 0 Offset relay 1 15 Switching differential relay 2 1 15 0 Offset relay 2 15 Switching differential relay 3 1 15 0 Offset relay 3 15 Switch on delay cooling Switch off delay cooling Parameter 20 21 in sec of min 0 seconds 1 minutes Minimum on time cooling 0 99 min Minimum off time cooling 0 99 min Minimum adjustable set point 50 0 50 0 C Maximum adjustable set point 50 0 50 0 C Read out above 10 C on whole degrees2. 0 No 1 Yes Type Alarm 0 No 1 Absolute 2 Relative Minimum alarm set point 50 0 50 0 C Maximum alarm set point 50 0 50 0 C Time delay minimum alarm 0 99 min Time delay maximum alarm 0 99 min Relay function alarm relay O fail safe alarm 1 control alarm Reset alarm relay after recovering No alarm Yes No Reset alarm relay after manual reset Yes Control delay after power failure 99 min Forced relay function at sensor failure No Cooling Heating Network number Software version Production year Production week Serial number x1000 Serial number units P S If type alarm is relative works the minimum alarm relative from the heating set point and the maximum alarm relative from the cooling set point Dimensions 60 65 Connections 69 5 Trafo 3VA fo 230 12Vac VDH art nr 350 010073 o 8 L N 230Vac Address VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands REMARK Connect a 250 Ohm Resistor between Je Line A and Line B at both CABLE ENDS oO op of RS485 Network 2 wire with shield Lee E v as oC nN o vw N aoj lt sr w 1 1 Low O oj wo Ooze oa co S a E e Z oe NNN co oy 4 rw ALFANET 71
3. User manual ALFANET 71 2SP aa Of Thermostat with f 2 set points ALFA 71 VDH doc 080659 Version v1 0 Date 21 05 2008 Software A71NW2SP File Do080659 WPD Range 50 50 0 C Installation On the upper side from the ALFANET 71 2SP is shown how the sensor supply output and relays should be connected After power up a self test is started If the self test is completed the measured temperature will be shown on the display Normally this will be the temperature from sensor 1 unless sensor 2 is programmed as a control sensor P05 1 In that case the average temperature from both sensors will be shown This will also be the control temperature The ALFANET 71 2SP can be read out and controlled on the pc Control The ALFANET 71 2SP thermostat can be controlled by four push buttons on the front SET viewing changing the adjusted value and reset alarm UP raise the adjusted value DOWN lower the adjusted value C hidden key above the SET key Viewing and changing the set points Set point heating By pushing the SET and the UP keys simultaneously the adjusted heating set point will be visible The dots from the first and the last digit also starts flashing Set point cooling By pushing the SET and the DOWN keys simultaneously the adjusted cooling set point will be visible The dot from the last digit also starts flashing To change the set point it should be made visible as described Release the keys By pus
4. a D i S2 fo YAO oO v Qe n p A a ao i ee wo v SUPPLY 2x SM811 12Vac Temp sens Tel 31 0 50 30 28 900 Fax 31 0 50 30 28 980 Email info vdhproducts nl Internet www vdhproducts nl
5. hing the SET key again the set point can be adjusted with the UP or DOWN keys A few seconds after releasing the keys the measured value will be visible again Viewing separate temperature By pushing the UP and DOWN keys simultaneously the individual temperatures from both sensors can be read out After releasing the keys it is possible to read out the measured temperature from sensor 1 by pushing the UP key and the measured temperature from sensor 2 by pushing the DOWN key A few seconds after releasing the keys the normal temperature will be visible again Status of the Relays By pushing the hidden C key the display shows the status of the relays The three digits are indicating the status from the relays hereby O off and 1 on The code 110 means that relay 1 and relay 2 are on and relay 3 is off Setting internal parameters Next to the adjustment of the set point some internal settings can be made like differentials sensor adjustments set point range and alarm settings By pushing the DOWN key for more than 10 seconds you enter the internal programming menu On the left display the upper and the lower segments are flashing Over the UP and DOWN keys the required parameter 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 the UP and DOWN keys allows you to change the value of this parameter If no key is pushed for 20 seconds
6. the ALFANET 71 2SP changes to it s normal operation mode Adjusting the sensors The sensors can be adjusted with the sensor offset parameter 06 sensor 1 and parameter 07 sensor 2 Indicates a sensor e g 2 C too much the according Sensor offset parameter has to be decreased with 2 C Error codes On the display from the ALFANET 71 2SP can appear the following error messages LO Minimum alarm Solution E1 E2 HI Maximum alarm Check if the sensor is connected well E1 Sensor 1 defect Check the sensor 1000 25 C E2 Sensor 2 defect Replace the sensor EEE Adjustments are lost Solution EEE Reprogram the adjustments L In case of sensor short circuit the display alternates between error code E and L as indication for a short circuit sensor H In case of open circuit sensor the display alternates between error code E and H as indication for a open circuit sensor Reset Alarm When a error messages appears it can be reset by pushing the SET key The function of this key depends on parameter P37 Technical details Type ALFANET 71 2SP Thermostat Range 50 50 0 C above 10 C read out per 0 1 C Supply 12Vac 50 60Hz 5 10 Read out 3 digit 7 segments display Relays Ry1 SPST NO 250V 8A cos o 1 of 250V 5A cos 0 4 Ry2 SPST NO 250V 8A cos o 1 of 250V 5A cos 0 4 Ry3 SPDT NO NC 250V 8A cos o 1 of 250V 5A cos 0 4 Relays have one common C
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