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User manual ALFA 31
Cool/Heat Thermostat.
VDH doc. 931224
Version: v1.3
Date: 22-08-1995
Software: ALFA31DP
File: DO931224.WP8
Range: -50/+50°C per 1°C
* Installation.
On the topside op the
ALFA 31
you can see how the sensor, power supply and relay have to be
connected.
After connecting the
ALFA 31
to the power supply, a self test function is started. As this test is finished
the measured temperature appears in the display.
When the relay is activated, the led 'on' will light-up in the display.
* Control.
The
ALFA 31
thermostat can be controlled by three pushbuttons on the front. These keys are:
SET
- view / change the setpoint.
UP
- increase the setpoint.
DOWN
- decrease the setpoint.
* Viewing setpoint.
By pushing the
SET
key the setpoint appears in the display. The led 'set' starts blinking. A few
seconds after releasing the
SET
key the setpoint disappears and the measured temperature is shown
in the display.
* Changing setpoint.
Push the
SET
key and the setpoint appears in the display. Release the
SET
key. 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.
