3
* Setting internal parameters.
Next to the adjustment of the set point, internal settings can be made like differential, sensor offset,
set point range and the functions of the thermostat.
Push the
DOWN
key for more than 10 seconds, to enter the 'Internal Programming Menu'. In the left
display the upper and lower segment are blinking. Over the
UP
and
DOWN
keys the required
parameter can be selected (see table for the parameters).
If the required parameter is selected, the value can be read-out by pushing the
SET
key. Pushing the
UP
or
DOWN
key to change the value of this parameter.
If 20 seconds no key is pushed, the
ALFA 52-VS
changes to the normal operation mode.
* Parameters ALFA 52-VS
Para-
Meter
Description Parameter
Range
Default
value
05
06
Offset temperature sensor 1
Offset temperature sensor 2
-15.0..+15.0
C
-15.0..+15.0
C
0.0
0.0
10
11
12
13
Switching differential
Switch on delay
Switch off delay
Parameter 11/12 in seconds or minutes
0.1..20.0
0..99
0..99
0 = seconds
1 = minutes
0.5
0
0
0
20
21
22
Minimum adjustable delta-setpoint
Maximum adjustable delta-setpoint
Read-out above -10
C on whole degrees
0.0..+20.0
C
0.0..+20.0
C
0= No
1= Yes
0.0
20.0
0
40
41
42
Relay function alarm relay
Reset alarm relay after recovered alarm
Reset alarm relay after manual reset
0= fail safe alarm
1= control alarm
0= No
1= Yes
0= No
1= Yes
0
0
0
45
46
Control delay after power failure
Relay active at error control sensor
0..99 min.
0= Non
1= Relay 1
2= Relay 2
0
0
95
96
97
98
99
Software version
Production year
Production week
Serial number (x1000)
Serial number (units)
0..255
00..99
1..52
0..255
0..999
0
0
1
0
0
* Function diagram.
