1
User manual
ALFANET 75
Cool/Defr. Thermostat
with fan-control.
VDH doc.002465
Version: v1.1
Date: 15-02-2005
Software: ALFA(NET) 75
File: Do002465.WP8
Range: -50,0/+50,0
C
* 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.
Summary of Contents for ALFANET 75
Page 6: ...6 Dimensions...
Page 7: ...7 Connections...
