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* Control.

The 

ALFA(NET) D1-DP

 alarm thermostat can by controlled by four push buttons on the front;

SET

 

- view / change set point.

UP

 

- increase set point.

DOWN

- decrease set point.

RESET ALARM

- reset an alarm (Buzzer off). 

* Viewing set point.

By pushing the 

SET

 key the set point appears in the display. The led 'set' starts blinking.

A  few  seconds  after  releasing  the  keys  the  set  point  disappears  and  the  measured
temperature is shown in the display.

* Changing set points.

Push the 

SET

 key and the set point appears in the display. Release the 

SET

 key.

Now push and hold  the 

SET

 key again and together with the 

UP

 or 

DOWN

 keys the set point

can be changed. A few seconds after releasing the keys the measured temperature is shown
again in the display.

* Error messages.

In the display of the 

ALFA(NET) D1-DP

 the following error messages can appear:

  

Er

- Sensor broken.  

Solution:

- Check if the sensor is connected correctly.
- Check the sensor (1000

 at 25

C).

- Replace the sensor.

  EE

- Settings are lost.  

Solution:

- Reprogram the settings.

Summary of Contents for ALFA D1-DP

Page 1: ... LED s one for Alarm red and one for ON green indication The thermostat can be programmed with parameter 15 for cooling or heating The ALFANET D1 DP is provided with an RS 485 Network connection so it can be read out and adjusted on the Alfanet Installation On the topside op the ALFA NET D1 DP is shown how the sensor power supply and relay are connected A few seconds after connecting the ALFA NET ...

Page 2: ...d temperature is shown in the display Changing set points Push the SET key and the set point appears in the display Release the SET key Now push and hold the SET key again and together with the UP or DOWN keys the set point can be changed A few seconds after releasing the keys the measured temperature is shown again in the display Error messages In the display of the ALFA NET D1 DP the following e...

Page 3: ...on mode Parameters ALFA NET D1 DP Para meter Description Parameter Range Standard Value 01 02 03 04 Switching differential Minimum set point Maximum set point Offset temperature sensor 0 1 10 0 C 10 90 0 C 10 90 0 C 10 0 10 0 C 3 0 10 0 90 0 0 0 10 11 12 Startup delay after power failure Relay on at sensor failure Buzzer on at alarm 0 99 Minutes 0 No 1 Yes 0 No 1 Yes 0 0 0 15 16 17 18 19 20 Functi...

Page 4: ...ation RS 485 Network 2x twisted pair shielded min 0 5mm2 maximum length 1KM 12V A B 0V only at ALFANET model Display 3 digit 7 segments display with 26 mm LED s green Indications 10 mm red Alarm LED 10 mm green ON LED Control by pushbuttons on the front Front Polycarbonate IP65 Sensor SM 811 2 wire PTC temperature sensor 1KOhm 25O C Dimensions 200 x 112 x 31 mm hwd Mounting 2x Headed screw on dist...

Page 5: ...5 Connections Alfa D1 DP connections Alfanet D1 DP connections ...

Page 6: ...6 Dimensions ...

Page 7: ...7 Adresse VDH Products BV Tel 31 0 50 30 28 900 Produktieweg 1 Fax 31 0 50 30 28 980 9301 ZR Roden Email info vdhproducts nl The Netherlands Internet www vdhproducts nl ...

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