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* 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

: -50/+50

C, readout per 1

Display

: 3-digit 7-segment display

Control

: pushbuttons on the front.

Status LEDs

: 1xLED 'compr.', 1xLED 'set' and 1xLED 'defrost'

Communication 

: ALFANET RS485-Network (3-wire shielded cable min. 0,75mm

2

   Only at ALFANET 45

Front

: Polycarbonate

Sizes CPU-unit

: 35 x 77 x 71,5mm (hwd)

Panel cutout CPU-unit

: 28 x 70mm (hw)

SUPPLY-unit of the 

ALFA-45

Supply

: 230 Vac 50/60Hz (or else see Product sticker)

Max. used power

: 6,2 VA

Fuse

: No internal fuse present

Product sensor

: SM 811/2m.

Defrost sensor

: SM 811/2m.

Relay Compressor

: SPST 250V/ 16A(C-NO) (cos phi=1)

Relay Defrost

: SPST 250V/8A(C-NO) (cos phi=1)

Relay Fan

: SPST 250V/8A(C-NO) (cos phi=1)

Sizes Supply-unit

: 58x71x90mm (hwd) for rail mounting

Operation temperature

: 0/+50

C

Operation rel. humidity

: 10/90 %RH not condensing

Ventilation

: Keep ventilation holes open

- Provided with memory protection during power failure.
- Connection with screw terminals.
- Equipped with self test function and sensor failure detection.
- Special version on request available.

* Address.

VDH Products BV

Tel:

+31 (0)50 30 28 900

Produktieweg 1

Fax:

+31 (0)50 30 28 980

9301 ZS  Roden

Email:

[email protected]

The Netherlands

Internet:

www.vdhproducts.nl

Содержание ALFA-45

Страница 1: ...it 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 produ...

Страница 2: ...t 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 pushin...

Страница 3: ...er P26 1 Startup delay after power failure Offset defrost sensor Fan off delay if parameter P22 1 Readout defrost sensor 1 15 C 50 50 C 50 50 C 15 15 C 0 3 0 99 1 99 Hours 0 99 Minutes 99 99 C 99 99 C...

Страница 4: ...e 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 meas...

Страница 5: ...st is 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 u...

Страница 6: ...play 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 an...

Страница 7: ...se see Product sticker Max used power 6 2 VA Fuse No internal fuse present Product sensor SM 811 2m Defrost sensor SM 811 2m Relay Compressor SPST 250V 16A C NO cos phi 1 Relay Defrost SPST 250V 8A C...

Страница 8: ...8 Dimensions CPU unit Dimensions SUPPLY unit Connections...

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