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YUTAKI CASCADE CONTROLLER
Solar combination - Total control
ΔT connection:
•
Allows to specify a difference temperature
between tank and Panel temperature to
allow solar operation. Solar operation is
allowed in case Panel temperature is "ΔT
connection" ºC above tank temperature.
ΔT disconnection:
•
Allows to specify a difference temperature
between tank and Panel temperature to
stop solar operation. Solar operation is not
allowed in case Panel temperature is "ΔT
connection"ºC below tank temperature
Panel antifreeze temperature:
•
Minimum Solar panel temperature at which
Solar Pump is switched ON in order to
protect system against frost formation at
pipes due to low ambient temperature.
Boiler combination
Minimum ON time:
•
Time that must pass before stop
boiler after being switched ON
Minimum OFF time:
•
Time that must pass before start
boiler after being switched OFF
Wait time for DHW
(Only for YUTAKI S):
•
Delay time to start Boiler for DHW in
case all conditions allow Boiler to start
after HP has been started for DHW.
140
PMML0575 rev.1 - 09/2021
DHW maximum time:
•
Maximum time YUTAKI allows to heat tank by
means Solar. At the end of this time Solar pump
is stopped regardless temperature conditions at
Solar Panel.
DHW minimum time:
•
Minimum Time solar operation cannot be
performed once it has been stopped due to DHW
Maximum Time or due to low temperature at solar
panel.
DHWT maximum storage temperature:
•
Maximum DHW temperature that allows Solar
operation.
Panel minimum temperature:
•
Minimum temperature of the solar Panel to allow
Solar operation
Panel overheat temperature:
•
Maximum panel operation temperature at which
Solar Pump is set to off in case Panel sensor
reads a temperature above this value in order to
protect system.
•
In case that the solar pump is stopped due to
panel overheat temperature, the YUTAKI unit
sets solar overheat output to high state provided
that this function has been setup as described
in
"8.13.3.11 Inputs, Outputs and Sensors
configuration".
Bivalent point:
•
Boiler is allowed to operate in case ambient
temperature is below this value
Combination mode:
•
Serial: Boiler operates in series with the heat-pump.
The boiler provides additional peak load capacity
and works together with the HP
•
Parallel: Boiler operates in parallel with the
heat pump. The boiler provides the full heating
requirements. In case Boiler is ON, HP is not
allowed to operate
Supply setting offset:
•
Setting offset for Boiler. Higher values imply earlier
stoppage of Boiler and vice versa.
•
Waiting time:
•
Delay time to start Boiler in case all conditions allow
Boiler to start after HP has been started for Space
Heating
DHW by boiler (Only for YUTAKI S):
•
Control to allow heat DHW by means Boiler
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