(between T3 and T4 temperatures) falls by
auxiliary hysteresis HP2.
Night cooling – YES enables / NO disables
night cooling mode between 0
00
÷5
00
hours.
Cooling temp ON. – DHW container
temperature (on T2 sensor), if exceeded,
and night cooling is enabled, the regulator
will begin the cool down at 0
00
a.m.
Cooling temp. OFF – DHW container
temperature (on T2 sensor) to which the
regulator will be cooling down the container
(if night cooling function is enabled and
Cooling temp. ON temperature is exceeded
between 0
00
÷5
00
).
TCOLkr alarm – Enabling (YES) or disabling
(NO) of the alarm of exceeding TCOLkr
temperature. This function does not influence
regulator’s operation. If the parameter is set
to NO, the regulator will not set off an alarm
after exceeding TCOLkr collector’s
temperature.
13.15. Solar thermal scheme N
Loading of DHW container and pool with priorities
function.
Fig. 13.14 Solar thermal scheme N
Depending on Priority setting
(Pool/DHW), the system will first load the
circuit to temperature preset of TsDHW or
TsPOOL.
If the container circuit has priority and it
has not reached its temperature preset, then the
P1 collector pump will be started with 100%
capacity, if the difference between T1 and T2
exceeds 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.
After reaching preset temperature in priority
circuit, the controller will switch the circuit.
The pool circuit will work analogically, except
that the temperatures are calculated from T1 and
T3 and the system uses auxiliary deltas
dTonPOOL ÷ dToffPOOL. Pool exchanger P2
pump is always switched on/off with delay as
specified in tDLY setting in relation to P1 pump.
When the second circuit is heated up to
preset temperature, the collector pump is
stopped. It will be restarted, when on any circuit
the temperature drops by hysteresis value
(HP1), in accordance with priority setting.
If the collector temperature reaches
TCOLcr value, the collector pump will be started
and the circuit will be switched to priority one in
order to reduce the collector temperature. It will
be stopped, when T1 temperature drops below
T1<TCOLcr-HP1.
If Priority is set for DHW, the collector
unloading will be continued only to the time when
TDHWmax is reached, and then the system
switches to the pool. In the pool circuit there is
no upper limit for discharging collector’s critical
temperature.
Switching between DHW/POOL is
controlled through H output. The circuit operation
starts only when the switching time elapsed
(tVALVE).
Due to pool system, the scheme has no
night cooling function.
List of parameters in Adjustment menu
TsDHW – Preset A and B container temperature.
TsPOOL- Preset pool temperature.
Priority- Priority setting: container (DHW) or
pool (POOL) loading.
Alarm TCOLcr – Switching on (YES) or off (NO)
the alarm on exceeding TCOLcr
temperature. This function will not affect the
controller operation. If the parameter is set
as NO the controller will not alarm when
TCOLcr temperature is exceeded at the
collector sensor.
13.16. Solar thermal scheme O
Loading of DHW container and pool with priorities
function.
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