Parameters overview | 4
B1820023_en | Service handbook Lambdatronic H 3200 - T4e 51
4.3.2 Solar - Temperatures
Boiler target temperature during solar charging
Up to this temperature the DHW tank is heated by the
solar system. If the solar panel system is equipped with an
isolating valve for switching between DHW tank and buffer
solar coil, then this parameter is responsible for switching
between both of these solar coils.
Temp differential to start collector pump
The collector pump activates when the collector
temperature exceeds the reference temperature in the
DHW tank or buffer tank by this value.
Temp difference to stop collector pump
The collector pump switches off when the difference
between the collector temperature and reference
temperature in the DHW tank or buffer tank is lower than
this value.
Maximum buffer tank bottom temperature during solar
charging
Prerequisite: Hydraulic system 12 or 13
If the sensor for the solar reference temperature in the
buffer tank exceeds the specified value, the collector
pump is switched off.
Minimum collector temperature
Minimum temperature at collector which must be reached
in order for the solar control to start.
Collector/pump protection from a collector temp.
If the measured value of the solar collector sensor
exceeds the set value, the solar collector must cool down
by 20°C within 15 minutes, otherwise the solar collector
pump stops in order to protect the pump.
Heat exchanger - buffer tank pump start delay
Prerequisite: Hydraulic system 12 or 13
Delay for switching on the pump between heat exchanger
and buffer tank.
Heat exchanger – buffer tank pump stop delay
Prerequisite: Hydraulic system 12 or 13
Delay for switching off the pump between heat exchanger
and buffer tank.
Buffer tank top solar setpoint (fast loading until
this temperature)
Prerequisite: Hydraulic system 12 or 13
When the upper sensor in the buffer tank reaches the
specified value, the solar isolating valve switches to the
lower area of the buffer tank.
Collector - buffer tank top differential
Prerequisite: Hydraulic system 12 or 13
This is the overcharge for the collector pump controller for
the top or bottom temperature in the buffer tank.
Top buffer tank – secondary HE flow difference
Prerequisite: Hydraulic system 12 or 13
This parameter indicates how much lower the temperature
at the heat exchanger secondary outfeed is than the
collector temperature should be. If the difference is less
than the set value, the speed of the pump between heat
exchanger, DHW tank and buffer tank is reduced.
4.3.3 Solar - Times
The solar panel system pump is allowed to start
from
If the criteria for starting the collector pump have been
reached after the set time, the collector pump starts.
The solar panel system pump is allowed to run
until
Also when the criteria for starting the collector pump have
been reached, the collector pump is only active up to the
set time.