User manual ALFANET 95
Contents
1. 0 No 1 Yes 150 15 C 0 No 1 Yes 0 50 0 C 0 1 Yes 0 90 Minutes 0 Natural 1 Hot gas Elec 2 Hot gas Elec Fan 50 50 C 0 90 Minutes 0 90 Minutes 0 99 Minutes 50 50 C 0 1 Yes 0 1 Yes 0 1 Yes 0 99 Minutes 0 None 1 Absolute 2 Relative 50 50 C 50 50 C 0 99 Minutes 0 99 Minutes 0 1 Yes 0 1 Yes 0 No 1 Yes 0 Fail safe alarm 1 Control alarm 0 23 Hours 0 59 Minutes 0 No 1 Yes 0 23 off Hrs 0 50 off Min 0 23 off Hrs 0 50 off Min 0 23 off Hrs 0 50 off Min 0 23 off Hrs 0 50 off Min 0 23 off Hrs 0 50 off Min 0 23 off Hrs 0 50 off Min Standard value Para Description of Parameter Range Standard meter value Night shift offset 10 0 10 0 90 Network number 1 95 Software version 96 Production year 97 Production week 98 Series number x1000 99 Series number units Technical data Type ALFANET 95 Cool Defrosting Thermostat CONTROL UNIT Range 50 0 50 0 C Read out 9 digit 7 segments display Accuracy 0 5 of the range Status LEDs ALARM COMPR FAN DEFR 1 and DEFR 2 On display through C key Operation through pushbuttons on the front Front Polycarbonate IP65 Network RS485 network 2xtwisted pair shielded Dimensions 85 x 77 x 71 5mm hwd Panel cutout 29 x 70mm hw l O2. l Diff Setpoint Address VDH Products BV Tel 31 0 50 30 28 900 Produktieweg 1 Fax 31 0 50 30 28 980 9301 ZS Roden Email info vdhproducts nl Netherlands Internet www vdhproducts nl
3. UNIT Supply 230 Vac 50 60Hz 5 10 Max 3VA Relays These two relays have one common Ry 1 Alarm SPDT NO NC 250V 8A cos 1 Ry 2 Cool SPST NO 250V 8A cos 1 These three relays have one common Ry 3 Fan SPST NO 250V 8A cos 1 Ry 4 Defrost 1 SPST NO 250V 8A cos 1 Ry 4 Defrost 2 SPST NO 250V 8A cos 1 Sensors 3x SM 811 10000 25 Contact input Dimensions 1x Day Night switch open night shift active or Door contact cooling and fan off when door is open 90x71x58mm hwd for rail mounting Equipped with memory protection in case of power failure Equipped with a self testing function Equipped with sensor failure detection Connection through screw terminals on supply relay module Special models available on request Dimensions of ALFANET 95 Control unit l O unit Connection data Diagram 042527w2 SENSORS x 3x SM811 Z 2 1 6 2 Sa 8 wire cable QOOOOO0000000 OR SS lt 60000 ALFA 95 Modulbox I O UNIT CONNECTOR 1 Defr 2 Cool Alarm Ry5 Ry4 Ry3 i no no no FRONT HOUSING CU UD ASS RS485 Network Cable 2x twisted pair shielded min 0 5mm RS485 Connections Pair 1 Line A to Line A and Line B to Line B Pair 2 2x Gnd to Gnd Shield
4. User manual ALFANET 95 with door contact OOOODOOOO00O T T T T T 123 4 5 ALARM COOL FAN 1 DEF 2 CONI to 2 Deft 1 Temp FUR ALFA 95 Modulbox VDH VO UNIT E B ALFA 95 T Defr 2 Fan Cool Alarm Ry5JRy4 Ry3 R no i7 ip 19 20 21 OOOOWWOOWOOO VDH doc 080643 Version v1 1 Date 12 04 2011 Softw 011506 ALFANET 95 RTDF DK File Do080643 wpd Range 50 0 50 0 C Description The ALFANET 95 is acooling heating thermostat with various automatic defrost and fan drive facilities It can be programmed through the ALFANET PC INTERFACE on the PC Installation On the connection diagram of the ALFANET 95 is shown how the sensor power supply and relays should be connected After the ALFANET 95 has been connected to the power supply a self test function will take place after which the measured temperature will appear in the display Operation The ALFANET 95 thermostat can be operated by means of four pushbuttons on the front These pushbuttons are SET view change the set point UP raise the set point DOWN lower the set point C hidden key under the C text Normal operation status During normal operation the temperature of the control sensor is shown in the display Viewing the set point By pressing the SET key the set point becomes visible At the same time the decimal point of the right hand display will blink as
5. again L In case of a short circuited sensor the error codes E and L will alternate in the display indicating a short circuited sensor H In case of a disconnected sensor the error codes E and H will alternate in the display indicating a disconnected sensor Alarm function When there is an error message or an alarm an error code message appears in the display The ALFANET 95 remembers this failure message even if the problem has already been solved The failure message can be reset with the SET key If after pressing the SET key reset alarm the alarm is not yet solved then the ALFANET 95 shows the temperature and error code alternately if the alarm has been solved then the error code disappears and the temperature is shown again Fan control settings The ALFANET 95 has various adjustment possibilities for the Fan Normally the fan is always running unless one of the parameters below is set at 1 Parameter 20 1 Fan switch differential active The fan only active if the temperature of the defrost sensor is lower than the control sensor temperature minus the temperature of the switch differential fan P21 Fan on if T aetrost lt Teontroi 2 T ranaitt Parameter 25 26 Fan switching on delay after defrosting After defrosting and draining of the humidifier to prevent the fan from running immediately and thus blowing warm air into the cell the following two conditions can be set i e a The fan is bl
6. an indication that the set point is being read A few seconds after the SET key has been released the set point will disappear and the measured value will be visible again Changing the set point Press the SET key The set point appears on the display Release the SET key Press the SET key again Now the set point can be adjusted with the UP or DOWN keys the set point can be adjusted A few seconds after the keys have been released the measured value will again appear in the display INDICATION LED S RELAY STATUS ALARM COMPR FAN DEFR 1 DEFR 2 Ry1 Ry2 Ry5 Status of the Relays Press the C key The three lower segments light up and the upper vertical segments show the status of the five relays see diagram Relay is active when the segment lights up The lower three segments are always on during status display and the upper segments light up as a relay is active Start stop defrost cycle The defrost cycle will stop and start automatically by internal parameters Defrosting can also be done manually Stop If defrosting is taking place defrosting can be stopped manually by pressing the DOWN and UP keys simultaneously Start If defrosting is not taking place then defrosting can be started manually by pressing the DOWN and UP keys simultaneously Setting internal parameters In addition to adjusting the set point a number of internal adjustments can be made including the dif
7. es Offset control sensor Defrost sensor 1 present Readout defrost sensor 1 Offset defrost sensor 1 Defrost sensor 2 present Readout defrost sensor 2 Offset defrost sensor 2 Fan switch differential active Switching differential fan Fan off if compressor is off Switching off delay fan Type of defrost fan relay 1 only defr relay 2 defr fan relay Switch on temperature fan after defrost Switch on delay fan after defrost Drip off time Maximum defrost time Defrost ending temperature Display fixed during defrost Day night contact as door contact Cooling and fan off if door is open Max time cooling and fan off when door is open Type of alarm Minimum alarm set point Maximum alarm set point Time delay maximum alarm Time delay minimum alarm Compressor on by failure control sensor Alarm off after manual reset Alarm off after alarm solved Function alarm relay Current time hours Current time minutes Real time defrost active Defrost time 1 hours Defrost time 1 minutes per 10 min Defrost time 2 hours Defrost time 2 minutes per 10 min Defrost time 3 hours Defrost time 3 minutes per 10 min Defrost time 4 hours Defrost time 4 minutes per 10 min Defrost time 5 hours Defrost time 5 minutes per 10 min Defrost time 6 hours Defrost time 6 minutes per 10 min Range 0 1 15 0 C 50 50 C 50 50 0 No 1 Yes 15 0 15 0 1 Yes 15 0 15
8. ferentials sensor offsets set point range compressor settings fan settings and the defrosting settings By pressing the DOWN key for more than 10 seconds the internal programming menu will be entered On the left hand display the upper and lower segment will blink With the UP and DOWN keys the required parameter can be selected see the parameter table When the required parameter has been selected the value of the parameter can be read out by pressing the SET key The parameter value can be changed by pressing the UP and DOWN keys If no key has been pressed for 20 seconds the ALFANET 95 will return to it s normal operation mode Adjusting the sensor The control sensor can be adjusted by means of the Offset control sensor parameter 05 The defrost sensors can be adjusted by means of the Offsets defrost sensors parameters 08 and 11 For reading the temperatures of the defrost sensor choose parameters 07 and 10 Should a sensor of the ALFANET 95 indicates 2 C too much for example Then the according Sensor Offset must be lowered by 2 C Error messages The following error messages may appear in the display of the ALFANET 95 LO Minimum alarm Solution E1 E2 E3 HI Maximum alarm Check if sensor is properly connected E1 Control sensor defect Check sensor 10000 25 E2 Defrost sensor 1 defect Replace sensor ES Defrost sensor 2 defect Solution EEE Settings have been lost Program the settings
9. ocked until the defrost sensor measures a temperature that is lower than the set switching on temperature of the fan P25 b Thefanis blocked until the switching on delay of the fan P26 is over when the defrost sensor reaches the switching on temperature P25 within the switching on delay then the fan is unblocked Parameter 22 1 Fan is off when the compressor is off The fan is turned off if the compressor is off This happens with a delay of parameter 23 Defrost control possibilities The automatic defrost is started on a real time P60 base and stops after the maximal defrost time P30 or earlier if the defrost sensor has reached the defrost end temperature P31 The ALFANET 95 has a number of automatic defrost possibilities that can be set with the following parameters Parameter 24 Type of defrost The ALFANET 95 has three possibilities for defrosting P24 0 For defrost only the relay FAN is switched on natural defrosting 24 1 For defrosting only the relay DEFR is switched on hot gas electrical defrosting P24 2 For defrosting both the DEFR and the FAN relays are switched on hot gas electrical fan defrosting Parameter 60 1Defrosting on the real time clock Here the defrosting is started at set times P61 to P71 Para meter Parameters ALFANET 95 Description of Parameter Switching differential Minimum adjustable set point Maximum adjustable set point Readout above 10 C in whole degre
10. only at one side to Earth Connect a 250 Ohm Terminator Resistor SUPPLY 5x RELAY OUTPUTS between Line A and Line B at both cable ends TERMINAL HOUSING RS 485 NETWORK CONNECTIONS 2 twisted pair shielded cable One of the Controllers can be the PC Interface Repeater is also a contr Place Terminator resistor of 250 Ohm only at both ends of the RS485 cable 7775 between and line B May be provided in the controller with a jumper For signal conditioning Place Pullup down resistors Network connections I g dow two ki Shield only at Shield only at only at one point the gt Pair 1 1 one side of oneside of Network May be provided in Connect A to A HI T the cable 5 the cable controller with jumpers MM B LO to B LO 2 ten m to Earth Or use ALFA 1 TERMINATOR Li ERR tRpOOooc c cEH 1 H3 513 Shield _ Oo cod ooo ceo coo dp 3 Connect Shield to clean Earth Endpoint Network cable Connection Network cable Endpoint only on one side of cable Network 2twisedpairshielded point 2 twised pair shielded Network min 0 5mm min 0 5mm Pair 1 2 Gnd Max Cable length 1KM Pair 1 A B Pair 2 Gnd Note 1 AVOID LONG STUB CABLES No longer than 0 5M otherwise use a Repeater Function diagram Function COOL
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