VDH ALFA 19, User Manual, Page: 3 / 4

3
* Setting internal parameters.
Next to the adjustment of the setpoint, some internal settings are possible like differential, sensor-
offset, set point range and the function humidify or dehumidify.
By pushing the
DOWN key more than 10 seconds, you 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 keys together with the SET key allows you to change the value of this parameter.
If after 20 seconds no key is pushed, the ALFA(NET) 19 changes to it's normal operation mode.
* Parameters ALFA(NET) 19.
PARA-
METER DESCRIPTION PARAMETER RANGE STANDARD
VALUE
01
02
03
04 Switching differential
Minimum set point
Maximum set point
Offset humidiy sensor 1..15 %RH
0..100 %RH
0..100 %RH
-15..+15 %RH 3
0
100
0
10 Startup delay after power failure 0..99 Minutes 0
15
16
17
18
19
20
Function hygrostat
Switch on delay relay 1)
Switch off delay relay 1)
Parameter 16/17 in sec. or min.
Minimum on-time relay
Minimum off-time relay
0 = Dehumidify
1 = Humidify
0..99
0..99
0 = Seconds
1 = Minutes
0..99 Minutes
0..99 Minutes 0
0
0
0
0
0
90
95
96
97
98
99 Network number
Software version
Production year
Production week
Serial number (x1000)
Serial number (units) 1..250
0..255
00..99
1..52
0..255
0..999 1
-
-
-
-
-
1) If delay is active, the led will flash
* Address.
VDH Products BV Tel: +31 (0)50 30 28 900
Produktieweg 1 Fax: +31 (0)50 30 28 980
9301 ZS Roden Email: info@vdhproducts.nl
The Netherlands Internet: www.vdhproducts.nl