VDH ALFANET 20 User Manual Download Page 1

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 

ALFA

NET

 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.

UP

 

- increase the setpoint.

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