Hitachi PC-ARFH1E1 02 Manual De Instrucciones página 52

PC-ARFH1E1(02/03) FUNCTIONALITIES
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Space optional functions
Auto Heat/Cool:
Only available in units capable of heating
and cooling operation, and when cooling
operation is enabled.
Allows to set automatic switch over to
heating and cooling operation using the
same daily average outdoor temperature
of the previous day as in Heating auto ON/
OFF.
• Status: Enable or disable auto heat/
cool.
• Switch to Heat temperature: operation
switches to heating in case that the
measured outdoor temperature value is
lower than the threshold for switching to
heating.
• Switch to Cool temperature: Operation
switches to cooling in case that the
measured outdoor temperature value is
higher than the threshold for switching
to cooling.
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DHW optional functions
DHW Boost:
To force a one-time heating of the DHW
tank up to the temperature set as DHW
Boost temperature.
This feature is useful to cover exceptional
demand of DHW.
• Trigger type: Push (favourite button),
Open (NC) or Closed (NO). Set input 6
for DHW Boost (for trigger type open/
"1.8.2.10 Inputs,
closed). (see section
Outputs and Sensors configuration")
• Boost setting: DHW temperature
setting for the Boost function.
44 PMML0626 rev.0 - 07/2022
Heating Auto On/Off:
To stop automatically stop heating operation
when the daily average outdoor temperature
of the previous day is higher than the defined
Switch-OFF temperature
• Status: Enable or disable heating auto on/
off function.
• Switch Off temperature: System is stopped
in case that the outdoor temperature is
higher than the Switch-OFF temperature.
• Switch On differential: Differential
temperature between average outdoor
temperature of the previous day and the
Switch Off temperature.
Circuit Pump: By using this output, user
can heat all the water inside DHW piping
system. Output must be configured at the I/O
and sensors menu. (see section
Inputs, Outputs and Sensors
• Disabled.
• Demand: Enable DHW recirculation.
• Anti Legionella: Allows DHW recirculation
while anti legionella is active.
• Timer: A timer can be programmed in order
to start or stop the water recirculation.
Recirculation timer:
• Frequency: Allows to select when timer is
applied (Everyday, weekend, workday)
• Starting Time: When the water pump
circulation starts.
• Stopping Time: When the water pump
circulation stops.
• Operation: In case of ON, means that
water pump is always ON between
"Starting Time" and "Stopping Time". In
case it is set to Timer, Recirculation pump
is ON during "ON Time" after being OFF
during "OFF Time" within Starting Time
and Stopping Time.
• ON Time: On time period of Recirculation
pump.
• OFF Time: Off time period of
Recirculation pump.
"1.8.2.10
configuration")