Advertisement
Quick Links
User manual
ALFANET 75
Cool/Defr. Thermostat
with fan-control.
VDH doc.002465
Software: ALFA(NET) 75
* Description.
The ALFANET 75 is a cool/defrost thermostat with various defrost- and fan-control settings.
And it is controllable on the PC thru the ALFANET PC-INTERFACE.
* Installation.
On the top side of the ALFANET 75 is shown how the sensor, power supply and relays has to be
connected.
After connecting the ALFANET 75 to the power supply, a self test function is started. As this test is
finished the measured temperature of the temperature-sensor (control) appears in the display.
* Control.
The ALFANET 75 thermostat can be controlled by four push buttons on the front. These keys are:
SET
- view / change the setpoint.
UP
- increase value.
DOWN
- decrease value.
C
- hidden push button above SET key and behind C symbol.
* View setpoint.
By pushing the SET key the setpoint appears in the display. The decimal point of the last display
starts blinking to indicate this. After a few seconds after releasing the SET key the setpoint
disappears and the measured temperature is shown again.
* Changing setpoint.
Push the SET key and the setpoint appears in the display. Release the SET key. Now push the
SET key again together with the UP or DOWN keys to change the setpoint. After a few seconds
after releasing the SET key the setpoint disappears and the measured temperature is shown again.
* Status of the Relays.
By pushing the hidden C key the display shows the status of the relays. Each display segment
shows the status of the relay output, showing 0= off and 1=on. The code 110 means relay 1(compr.)
en relay 2(fan) are on and relay 3(defr.) is off.
Version: v1.1
File: Do002465.WP8
1
Date: 15-02-2005
Range: -50,0/+50,0 C
Advertisement
Related Manuals for VDH Products ALFANET 75
Summary of Contents for VDH Products ALFANET 75
- Page 1 And it is controllable on the PC thru the ALFANET PC-INTERFACE. * Installation. On the top side of the ALFANET 75 is shown how the sensor, power supply and relays has to be connected. After connecting the ALFANET 75 to the power supply, a self test function is started. As this test is finished the measured temperature of the temperature-sensor (control) appears in the display.
- Page 2 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 after 20 seconds no key is pushed, the ALFANET 75 changes to it’s normal operation mode. * Sensor adjustment.
- Page 3 * Fan control. The ALFANET 75 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 20 = 1 Fan switch differential active: The fan is only active when the defrost temperature is “parameter 21"...
- Page 4 * Parameters ALFANET 75. Para- Description Parameter Range Default meter Value 0,1..15,0 C Switching differential -50..+50 C Minimum setpoint -50..+50 C Maximum setpoint Read out above -10 C per 1 C 0=No, 1=Yes -15,0..+15,0 C...
- Page 5 * Technical details. Type : ALFANET 75 Cool/Defrost Thermostat : -50,0/+50,0 C Range Supply : 12 Vac/16,5Vdc (-5/+10%) Read out : 3-digit 7-segments display : COMPR., FAN and DEFR. On display thru C key Status Led’s Relays : The three Relays have one common;...
- Page 6 * Dimensions.
- Page 7 * Connections.
- Page 8 * Function diagram. * 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 The Netherlands Internet www.vdhproducts.nl...