88
Start function STARTF (ideal for tube collectors)
In the morning, solar power systems sometimes do not “start” quickly enough because the
warm heat transfer medium does not reach the collector sensor. Flat collector panels and
forced-circulation vacuum tubes
generally lack sufficient gravitational force.
The start function tries to release a rising interval while the collector temperature is
constantly monitored. The computer first determines the weather conditions based on the
constant measurements of the collector temperatures. It thus determines the right time for a
short rinsing interval to maintain the actual temperature for normal operation.
When the radiation sensor is used, the solar radiation is used for the calculation of the start
function (radiation sensor
GBS 01
- non-standard accessory).
The start function may not be activated in conjunction with the drain-back function.
Since the device also supports twin collector field systems this function is available
twice
.
The start functions are deactivated ex works and only make sense together with a solar
system. In activated condition the following sequential diagram for STF 1 results (STF 2 is
identical):
ON/OFF
Collector
sensor
Radiation
sensor
Radiation value
Radiation threshold
Monitor
outputs
Rinse
outputs
Pump run-time
Maximum
interval time
Start attempt
counter
Function number
