1
User Manual
ALFA(NET) 33 DP -10/+90
/
C (0,1)
Minimum / Maximum Alarm Thermostat.
VDH doc. 120548
Version: v1.0
Date: 29-05-2012
Software: 0726443 ALFA 13/23/33 DP2 F
File: Do120548.wpd
Range: -10/+90
/
C readout per 0,1
/
C
* Function.
The
ALFA(NET) 33 DP
is a digital alarm thermostat for panel mounting. The temperature is readout
in tents of degrees Celsius. The thermostat watches the minimum and maximum temperature. To
report a alarm the
ALFA(NET) 33 DP
has one relay for both alarms.
The
ALFA
NET
33 DP
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) 33 DP
you can see how the sensor, power supply and relay have
to be connected.
After the
ALFA (NET) 13 DP
is connected to the power supply, it takes a few seconds to show the
measured temperature in the display.
The alarm relay is a multi functional combined minimum- and maximum-alarm, at alarm the LED ‘set
high’ is lit in the display.
* Control.
The
ALFA(NET) 33 DP
alarm thermostat can be controlled by three pushbuttons on the front;
SET
- view / change setpoints and reset of alarm.
UP
- increase a value.
DOWN
- decrease a value.
* Viewing setpoints.
Viewing setpoint of maximum alarm:
By pushing the
SET
key first and then the
UP
key together the maximum alarm setpoint appears
in the display. The led 'set high' starts blinking.
Viewing setpoint of minimum alarm:
By pushing the
SET
key first and then the
DOWN
key together the maximum alarm setpoint appe-
ars in the display. The led 'set low' starts blinking.
A few seconds after releasing the keys the setpoint disappears and the measured temperature is
shown in the display.
* Changing setpoints.
Push the
SET
key together with the
UP
or
DOWN
key and the maximum alarm setpoint or minimum
alarm setpoint appears in the display. Release both keys.
Now push the
SET
key again and together with the
UP
or
DOWN
keys the setpoint can be changed.
A few seconds after releasing the keys the measured temperature shows again in the display.
