VDH ALFANET 20 User Manual

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User Manual

ALFA 20 and

ALFANET 20

Thermometer

VDH doc: 070697

Versie: v1.1

Datum: 03-10-2008

Software: ......_ALFA 10/20/30

File: Do070697.wp8

Range: See Sticker

* Function.

The ALFA(NET) 20 is a digital thermostat for panel mounting.

The ALFANET 20 has a RS 485 network connection so it can be read out and

adjusted on the Alfanet.

* Installation.

On the topside of the ALFA(NET) 20 is shown how the sensor, power supply and

network have to be connected.

After connecting the ALFA(NET) 20 to the power supply, a self-test function is

started. As this test is finished, the measured temperature appears in the display.

When the relay is activated, the led 'on' will light-up in the display.

* Control.

The ALFA(NET) 20 Thermostat can be controlled by three

hidden push buttons on the front.

These keys are:

SET

- view / change the setpoint.

DOWN - decrease the setpoint.

- increase the setpoint.

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1 user manual alfa 20 and alfanet 20 thermometer vdh doc: 070697 versie: v1.1 datum: 03-10-2008 software: ......_alfa 10/20/30 file: do070697.Wp8 range: see sticker * function. The alfa(net) 20 is a digital thermostat for panel mounting. The alfanet 20 has a rs 485 network connection so it can be re...
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2 * viewing setpoint. By pushing the set key the setpoint appears in the display. The led 'set' starts blinking. A few seconds after releasing the set key the setpoint disappears and the measured temperature is shown in the display. * changing setpoint. Push the set key and the setpoint appears in t...
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3 * adjustment sensor. The sensor can be adjusted by using the sensor offset (parameter 04). Indicates the alfa(net) 20 e.G. 2 c too much, the sensor offset has to de decreased with 2 c. * error messages. In the display of the alfa(net) 20 the following error messages can appear: er - sensor broke...
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4 * dimensions. * connections. * adresse. 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 nederland internet: www.Vdhproducts.Nl.