The collector pump will be started with
100% capacity, if the difference between T1 and
T2 exceeds the value of dTonPOOL and it will be
working for the time specified in parameter tP. If
after this time the difference between T1 and T2
is still above dTonPOOL, the pump speed will
remain at 100%. If the said difference between
T1 and T2 drops below dTonPOOL, the
controller will start reducing the pump speed,
until the difference between T1
and T2 reaches the value specified as
dToffPOOL.
If the difference between T1 and T2 is between
the values dTonPOOL ÷ dToffPOOL, the
controller will calculate and set pump speed
proportionally.
When dToffPOOL is reached, the pump will work
at minimal speed (Pmin), below it will be
stopped.
The system operates, until T2 sensors
reaches preset temperature TsPOOL, and then
the collector pump P1 is stopped.
If T1 temperature in collector reaches
critical value (TCOLcr), then the controller will
allow the collector pump to be started, in order
to reduce the collector’s temperature below
hysteresis HP1.
P2 pump operation depends on dTP2
setting. If the setting is other than OFF, pump
P2 will be started, if the difference T1-T4<dTP2
between collector and exchanger is lower than
dTP2 setting value.
At the setting value OFF, the pump P2
will be started after the time tDLY from the start
of P1 pump.
Pool exchanger P2 pump will be always
stopped after tDLY time, counting from the
moment when the collector pump P1 is stopped.
List of parameters in Adjustment menu
TsPOOL- Pool temperature preset.
Alarm TCOLcr – Switching on (YES) or off (NO)
the alarm on exceeding TCOLcr
temperature. The controller’s operation is the
same at both settings. If the parameter is set
as NO, the controller will not alarm after
exceeding TCOLcr at the collector sensor.
13.11. Solar thermal scheme J
Loading of DHW reservoir from solar collector
and from back-up source.
Fig. 13.10 Solar thermal scheme J
The collector pump will be started with
100% capacity, if the difference between T1 and
T2 exceeds the value of dTonDHW and it will be
working for the time specified in parameter tP. If
after this time the difference between T1 and T2
is still above dTonDHW the pump speed will
remain at 100%. If the said difference between
T1 and T2 drops below dTonDHW, the controller
will start reducing the pump speed,
until the difference between T1 and T2 reaches
the value specified as dToffDHW. If the
difference between T1 and T2 is between the
values dTonDHW ÷ dToffDHW, the controller
will calculate and set pump speed proportionally.
When dToffDHW is reached, the pump
will work at minimal speed (Pmin), below it will
be stopped.
If TsDHW temperature is reached for
sensor: T2- reservoir loading from collector will
be stopped by the time when measured
temperature at T2 is lower than TsDHW –HP1.
If T1 temperature in the collector reaches
the value of TCOLcr, the collector pump will be
started (despite of reaching TsDHW). It is aimed
to reduce the collector’s temperature. It will be
stopped, when T1 drops below TCOLcr-HP1. If
TDHWmax is reached at T2 sensor, loading of
heat to the reservoir is disabled (even if TCOLcr
has been reached). It is to protect the reservoir
from overheating.
The controller will heat DHW reservoir
from back-up source (P2 outlet) up to
TDHWmin temperature at T3 sensor. When the
temperature is reached, the controller will disable
P2 output. It will re-enabled when T3 sensor
temperature is lower than TDHWmin-HP2
Setting TDHWmin may be changed through
main menu item TDHWmin as described in
section 8.1.
List of parameters in Adjustment menu
TsDHW- Reservoir temperature preset
Night cooling- YES enables/ NO disables night
cooling mode in hours 0
00
÷5
00
.
Night cooling ON – DHW reservoir temperature
(T2 sensor) when exceeded at 0
00
, if night
cooling function is enabled, the controller will
decide on night cooling activation.
Night cooling OFF – DHW reservoir
temperature (T2 sensor), to which the
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