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UNIT 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.
93
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
"7.13.4.10 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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