1
User manual
ALFA(NET) 52 0/+100
C
Double Thermostat.
VDH doc. 072384
Version: v1.0
Date: 18-10-2007
Software: ALFA 52 0-100
C
File: Do072384.WPD
Range: 0/+100
C
* Installation.
On the connection diagram of the
ALFA(NET) 52
is shown how the sensors, power supply and
relays has to be connected. After connecting the
ALFA(NET) 52
to the power supply, a self test
function is started. As this test is finished, the measured temperature of thermostat-1 appears in the
display. Thermostat-1 works with sensor-1 and relay-1. Thermostat-2 works with sensor-2 and
relay-2. Relay-3 can function as alarm relay or functions as second stage of thermostat-2.
* Control.
The
ALFA(NET) 52
thermostat can be controlled by four pushbuttons on the front These keys are:
SET
- view / change set point and reset the alarm
(UP)
- increase the set point.
(DOWN)
- decrease the set point.
MODE
- relays status key.
* Viewing the temperature of sensor-2.
By pressing the
UP
key, the measured temperature of sensor-2 is shown in the display. After
releasing the key, the measured temperature of sensor-1 is shown again in the display.
* Viewing set points.
Viewing set point of thermostat-1:
By pushing the
SET
key and then simultaneously pushing the
UP
key, the set point of
thermostat-1 appears in the display.
Viewing set point of thermostat-2:
By pushing the
SET
key and then simultaneously pushing the
DOWN
key, the set point of
thermostat-2 appears in the display.
A few seconds after releasing the keys the set point disappears and the measured temperature of
thermostat-1 is shown again in the display.
* Changing set points.
Push the
SET
key together with the
UP
or
DOWN
key in order to select the desired set point (see
above). Release the
SET
key. Now push the
SET
key again together with the
UP
or
DOWN
keys to
change the set point. A few seconds after releasing the keys, the measured temperature of sensor-
1 is shown again in the display.
