VDH ALFA 33DP User Manual

VDH doc: 970631
Software: ALFA 33DP
* Installation.
On the topside of the ALFA 33DP you can see how the sensor, power supply and relay has to be
connected.
After connecting the ALFA 33DP to the power supply, a self test function is started. As this test is
finished the measured temperature appears in the display.
The relay alarm is a multi functional combined minimum- and maximum alarm, at alarm the led 'on'
will light-up in the display.
* Control.
The ALFA 33DP alarm thermostat can be controlled by three push buttons on the front;
SET - view / change setpoints and reset of alarm.
UP - increase a setpoint.
DOWN - decrease a setpoint.
* 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 the 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.
User manual ALFA 33DP
Min./Max. Alarm thermostat.
Version: v1.1
File: Do970631.WP8
1
Date: 15-06-2001
Range: -10/+40°C, per 0,1°C