15
7 Controller
functions
7.1 General controller functions
The controller compares the temperatures of the various measuring points and
optimally charges the storage tank. If the collector temperature exceeds the
storage tank temperature, the solar circuit pump is switched on. Monitoring and
protection functions ensure safe operation.
7.1.1 Dual storage tank systems (diagram 1 and 2)
Examples of dual storage tank systems:
two separate storage tanks
one stratifi ed storage tank
one storage tank and a swimming pool, etc.
The controller detects the temperature changes in the collector and the storage
media, determines the primary and secondary charging while, of course, taking
into consideration the charging duration as well as an interruption of this func-
tion along with a waiting period to monitor the collector temperature.
"Basic Setup" menu
Display
Meaning
Value range Factory set-
ting
Line
Value
9
240
Controller response time in s
30 – 480
240
10
1
First-priority storage tank selection
1 – 2
1
7.1.2 RPM control
The A1 and A2 outputs can be operated using an RPM control.
"Programming" menu
Display
Meaning
Value range Typical set-
ting
min
100
12
Set the minimum pump capac-
ity using the RPM control
100% = RPM control off
30% – 100%
100%
■
■
■
Settings and changes in
this menu must only be
carried out by a specialised
technician. Incorrect settings can
damage or adversely aff ect the
function of the solar power
system.
Settings and changes in
this menu must only be
carried out by a specialised
technician. Incorrect settings can
damage or adversely aff ect the
function of the solar power
system.
