Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 275

YUTAKI CASCADE CONTROLLER ATW-YCC-(01-02)
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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/closed). (see
section "10.6.2.9 Setup of inputs, outputs
and sensors")
• Boost setting: DHW temperature setting
for the Boost function.
261 PMML0575 rev.2 - 03/2022
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
"10.6.2.9 Setup of 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.