Technische Alternative UVR65, Programs, Installation, Electric Connection User Manual

Page: 12 / 176

12
Differential control – Programs
Program 0 – Simple solar system (factory settings)
S3 only used in pr1
Program 0: Pump A1 runs if:
• S1 is greater than threshold min1 w and S1 is greater than S2 by the difference diff1
• and S2 has not exceeded threshold max1 .
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
All Pr1:
In addition, if S3 exceeds the threshold max2 , pump A1 is deactivated.
All Pr4: Simple drain-back solar system with valve
This program may only be selected if the drain-back function ( Expert level/Drain-back) is ac -
tivated.
The basic settings are the same as with program 0:
A valve on output 3 prevents the heat transfer medium from flowing out of the solar panel
during the day.
Once the filling time has elapsed, the valve connected to
A3 is switched on.
If the pump A1 is switched off due to the temperature difference , the valve A3 will remain
switched on for another 2 hours.
If the excess temp. limiter or frost protection are activated, the sun radiation value goes be
-
low 50W/m
2
(only if a radiation sensor is used) or if the low water level protection detects a
low volume flow after the filling time, the valve is closed immediately.
All Pr1:
In addition, if S3 exceeds the threshold max2 , pump A1 is deactivated.
necessary settings:
max1
max2
min1
diff1
... limit CYL S2
... see all programs +1
... activation temp. coll. S1
... coll. S1 - CYL S2
à
A1
à A1
à
A1
necessary settings:
max1
max2
min1
diff1
... limit CYL S2
... see programs 1 or 5
... see program 0
... coll S1 - CYL S2