User manual ALFA-45 and ALFANET-45
Contents
1. C 0 99 Minutes temp in C O No 1 Yes O No 1 Yes O No 1 Yes O No 1 Yes O No 1 Yes O No 1 Yes O No 1 Yes O No 1 Yes Compressor control The compressor relay activates when the product sensor measures a higher temperature than the setpoint switching differential parameter 1 and deactivates when the temperature descents below setpoint There are 4 different modes off delay on the compressor possible with parameter 05 as shown below Parameter 05 0 The compressor relay has a start up delay of parameter 6 seconds Parameter 05 1 The compressor relay has a start up delay of parameter 6 minutes Parameter 05 2 After switching off the compressor waits at least parameter 6 minutes before switching on again Parameter 05 3 In between the switching on points the compressor waits at least parameter 6 minutes Next options for Compressor control are available Parameter 15 A compressor on delay after power failure of parameter 15 minutes Parameter 23 1 The compressor relay activates at product sensor failure Fan control The ALFA NET 45 has several parameters for fan control Normally the fan is always active accept for one of the following parameters is set to 1 the fan can be stopped Parameter 19 1 Fan switch differential active The fan is only active when the defrost temperature is parameter 13 C lower then the measurement of the product temperature As there are no2. SET key the setpoint disappears and the measured product temperature is shown in the display Changing setpoint Push the SET key and the setpoint appears in the display Release the SET key Now push the SET key again and together with the UP or DOWN keys the setpoint can be changed A few seconds afer releasing the keys the measured product temperature is shown again in the display Manual starting stopping of defrost The defrost cycle is automatic started and stopped These defrost settings thru internal parameters At active defrost the led defrost is on Stop defrost If there is a defrost cycle the defrost can by manually stopped by pushing the UP key and than the SET key while the UP key is hold Start defrost If there is no defrost cycle the defrost can be started manually by pushing the UP key and than the SET key while the UP key is hold Setting internal parameters Next to the adjustment of the setpoint some internal settings are possible like differential sensor offset setpoint range and the defrost function By pushing the DOWN key more than 10 seconds you enter the internal programming menu In the left display the upper and lower segment are blinking 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 pa
3. User manual ALFA 45 and ALFANET 45 CPU unit SUPPLY unit Cool Defrost thermostat with Fan control defrost set DODOOOOOODODD ALFA 45 Modulbox SUPPLY UNIT ODODWOODWODOOOO VDH doc 053884 Version v1 3 Datum 04 04 2011 Software ALFA 45 F Doc Do053884 wpd Range 50 50 C per 1 C Installation The ALFA NET 45 consist of two parts a Supply unit for rail mounting and a CPU unit for front mounting with operation buttons display These two units are connected with each other by a cable with 8 pole data connector On the front of the ALFA 45 Modulbox supply unit is shown how sensors and power supply are to be connected After connecting the ALFA NET 45 to the power supply a self test is started As this test has finished the measured temperature of the product sensor appears in the display The Supply unit has three relay outputs one for the compressor one for the fan and one for defrost The compressor relay and the defrost relay got there own led indication in the display And the ALFANET 45 is by use of the ALFANET PC INTERFACE controllable on the PC Control The ALFA NET 45 thermostat can be controlled by three pushbuttons on the front These keys are SET view change of settings UP increase of settings CF DOWN decrease of settings Viewing setpoint By pushing the SET key the setpoint appears in the display The led set starts blinking A few seconds after releasing the
4. further conditions to switch the fan off e g Parameter 13 2 C and the product sensor measures 10 C than the fan is only active as the defrost sensor measures 10 2 8 C or less Parameter 20 1 Fan off on defrost cycle The fan is switched off during defrost and to prevent blowing in hot air in the cabin after defrost and the dripping off time there are two conditions which can be set 1 The fan is blocked until the defrost sensor measures a temperature lower than the temperature setting of parameter 10 2 The fan is blocked until the defrost delay time of parameter 11 has stopped Unless the defrost sensor has reached the temperature setting of parameter 10 When the defrost sensor is broken Failure E2 the ALFA NET 45 runs down the entire time of parameter 11 Parameter 22 1 Compressor off gt Fan off The fan deactivates as the compressor deactivates with a delay of parameter 17 minutes Provided that there are no other conditions to deactivates the fan Defrost control The automatic defrost is started by the defrost cycle time P07 and stopped by the maximum defrost time P08 or sooner by reaching the maximum defrost temperature P09 Further has the ALFA NET 45 additional parameters to control defrost Parameter 24 0 Function defrost with a fixed defrost cycle time With parameter 7 as the chosen cycle time Parameter 24 1 Function defrost based on total compressor running hours The defrost is
5. rameter If after 20 seconds no key is pushed the ALFA NET 45 changes to it s normal operation mode Parameters ALFA NET 45 PARA METER DESCRIPTION PARAMETER Switching differential Minimum setpoint setting Maximum setpoint setting Offset product sensor Compressor start up protection 0 start up delay in seconds 1 start up delay in minutes 2 delay between switch off and switch on in minutes 3 delay between switch on and switch on in minutes Compressor start up time belonging to parameter 05 Defrost interval Maximum defrost time End of defrost temperature Fan on temperature P20 1 Fan delay time P20 1 Drain time in min Switching differential fan P19 1 Defrost delay after power failure if parameter P26 1 Startup delay after power failure Offset defrost sensor Fan off delay if parameter P22 1 Readout defrost sensor Fan switch differential active Fan off while defrost active Compressor on at defrost Compressor off gt Fan off Compressor on at product sensor failure Defrost cycle time based on compressor running time Temperature display locked during defrost cycle Start with defrost after power failure Network number Software version Production year Production week Serial number x1000 Serial number units RANGE STANDARD VALUE 0 99 1 99 Hours 0 99 Minutes 99 99 C 99 99 C 0 99 Minutes 0 99 Minutes 0 99 C 0 99 Minutes 0 99 Minutes 15 415
6. rrectly Check the according sensor 10009 25 C Replace according sensor EE Settings are lost Fatal error settings are lost and display shows EE Solution for EE Reprogram the settings Technical details Types ALFA 45 Cool Defrost Thermostat with fan control ALFANET 45 Cool Defrost Thermostat with fan control and RS485 network connection CPU unit of the ALFA NET 45 Range Display Control Status LEDs Communication Front Sizes CPU unit Panel cutout CPU unit SUPPLY unit of the ALFA 45 230 Vac 50 60Hz or else see Product sticker 6 2 VA No internal fuse present SM 811 2m SM 811 2m SPST 250V 16A C NO cos phi 1 SPST 250V 8A C NO cos phi 1 SPST 250V 8A C NO cos phi 1 58x71x90mm hwd for rail mounting 0 50 C 10 90 RH not condensing Keep ventilation holes open Supply Max used power Fuse Product sensor Defrost sensor Relay Compressor Relay Defrost Relay Fan Sizes Supply unit Operation temperature Operation rel humidity Ventilation 50 50 C readout per 1 C 3 digit 7 segment display pushbuttons on the front 1xLED compr 1xLED set and 1xLED defrost ALFANET RS485 Network 3 wire shielded cable min 0 75mm Only at ALFANET 45 Polycarbonate 35 x 77 x 71 5mm hwd 28 x 70mm hw Provided with memory protection during power failure Connection with screw terminals Equipped with
7. self test function and sensor failure detection Special version on request available Address VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands Tel 31 0 50 30 28 900 Fax 31 0 50 30 28 980 Email info vdhproducts nl Internet www vdhproducts nl Dimensions CPU unit Dimensions SUPPLY unit AA 9 N 90 8 62 46 A E onn S LEE F Connections 3 Oju ist N Si 5 D Aos gt ZO ne a Lie oj v o low oj v x o an alec P 75 i ger a e 8 wire cable o 5 with RJ45 LI F Connectors z oO D oO Vv MODULBOX TERMINAL HOUSING FRONT HOUSING SUPPLY UNIT A ALFA 45 Modulbox Wiss 0 0 13 15 18 20 22 24 OOWOOWOWOVO PAY OUTP Only on RELAY OUTPUT ALFANET 45 2 2 2 2 2 RS 485 NETWORK REMARKS Shield on one side of the cable connected to Earth ore Connect a 250 Ohm Terminator Resistor between Sa 3 5 Line A and Line B at both CABLE ENDS of o pA S RS485 cable 3 wire shielded min 0 75mm ao gt gt Oo oo oo E me vo oo oo BEGY cw af
8. started when the compressor has run for parameter 7 hours after the last defrost Parameter 25 1 The temperature readout on the display is locked during defrost cycle Parameter 26 1 After power up the ALFA NET 45 starts with defrost after running thru the defrost delay time of parameter 14 While running down the delay the ALFA NET 45 can cool after this delay the defrost is started Parameter 21 1 On hot gas systems the compressor is switched on during defrost After defrost the dripping off time of parameter 12 is started During this time the defrost and compressor relay are deactivated so the condenser can drip off it s water Sensor adjustment The product sensor Temp can be adjusted by using the Offset product sensor parameter 04 The defrost sensor Defr can be adjusted by using the Offset defrost sensor parameter 16 For readout of the defrost sensor on the display use parameter 18 Indicates a sensor e g 2 C to much the according Sensor Offset has to de decreased with 2 C Alarms In the display of the ALFA NET 45 the following error messages can appear E1 Product sensor error Fatal error display shows E1 and all relays are deactivated accept when parameter 24 is 1 then the compressor and fan are activated as needed E2 Defrost sensor error Non fatal error the ALFA NET 45 go s on regulating and the display shows E2 Solution for E1 and or E2 Check if the sensor is connected co
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