50
Differential Controller
User Guide
43 Maximum Storage Tank
Temperature
The maximum storage tank
temperature is monitored by F4.
In this case, the tank covering
must be taken into account.
The pump is deactivated when the
temperature falls below the temperature
[maximum storage tank temperature -
5K].
Pump Kick Function (Temperature
Test Function)
System 1 Only (System 2 -> No
Function):
60 Kick Duration [sec]
Collector pump runtime following pump
kick.
61 Kick Pause [min]
If the collector pump has not run for the
duration set here, the pump is activated
for the kick duration period [P60].
62 Measuring Time for 0.5K Increase
[min]
The course of the collector temperature
is controlled during this period following
a pump kick. If an increase of 0.5K is
detected, the pump is started for a
further minute.
!
Production Estimate
System 1 Only (System 2 -> No
Function):
The controller can perform an estimated
production calculation. To do this,
enter the average volume flow through
the respective collector when the
charging pump is in operation [P75].
Refer to page 58 for volume flow rate.
The volume flow is totalled during the
runtime of the collector pump.
The controller can calculate the solar
heat production from the volume flow
and the temperature difference F1 to
F4.
For the calculation, the heat transport
medium used in the system (glycol type
= P79) and the mixture ratio with water
[P78] must be set.
The day's production and total
production are displayed in [kWh]; in
the case of values in excess of 10 MW,
the display of the total production
changes to [MWh]. The change is
indicated in the display by means of
three arrows. The total production is
updated on the same day. The day's
production is reset to zero at midnight.
Both values can be reset to zero at user
level by means of the Prog key.
75 Volume Flow Fix for Collector 1
[Litre/min]
Enter the average volume flow through
the collector while the collector pump is
in operation. The accuracy
of this value directly influences the
accuracy of the production calculation.
78 Mixture Ratio
System 1 Only (System 2 -> No
Function):
Refer to the documents supplied for
information on the mixture ratio of the
heat transport medium (filling of the
solar energy system) or ask the
installation technician.
79 Glycol Type
System 1 Only (System 2 -> No
Function):
(Solar-electricity system documents /
installation technician).
0 = Propylene glycol
1 = Ethylene glycol
Pump Blocking Protection
The controller effectively prevents the
pumps blocking following longer
periods out of operation. The integrated
protection function activates all the
pumps which have not operated within
the last 24 hours each day for approx.
5 seconds between 12:00 and 12:01.
12 Differential Controller
User Guide
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