Hitachi YUTAKI S Series Technical Catalogue page 135

10 Optional functions
Indoor unit
10.1.2.3 Optional functions for Heat pump
Optional function
Hydraulic separator
combination
Electrical heater or boiler
emergency mode
Power meter data control
Capacity data control
Smart Function
Air Purge
Unit Test Run
Night shift
127 TCGB0123 rev.2 - 10/2019
In some cases, water pump of the YUTAKI unit is not sized for big heating installation
(small water pump). In this case, a hydraulic separator or buffer tank and secondary
water pump has to be used to ensure proper water pump dimensioning.
The boiler is configured in parallel with the heat pump. A hydraulic separator or buffer
tank has to be used to ensure proper hydraulic balancing. Additional Water pump (WP3)
and water sensor (Two3) are needed for boiler combination control (automatic added
when Boiler combination is enabled).
For more information refer to "Space water temperature control"
Manual.
For the use of the electrical heater or boiler in case of outdoor unit fault, additional
setting shall be applied into IU setting:
Electrical heater emergency can be both automatic or manual switched ON by the user
and the configuration must be done from the Unit controller
For more information refer to "Auxiliary electric heater for space heating"
Service Manual.
The measuring of the real power consumption can be done connecting an external
power meter. The number of pulses of the power meter is a variable which must be set
through the unit controller. By this, every pulse input is added into its corresponding
operation mode (Heating, Cooling, DHW Operation). Two possible options:
- One power meter for all installation (IU+OU).
- Two separated power meters (one for IU and one for OU).
For more information refer to "Heat Pump optional functions"
Due to usage of Water temperature inlet and outlet + water flow leve, a estimation of
capacity can be checked.
This screens show the value of kWh for each zone (Heating,Cooling, DHW, swimming
pool and its total) and also let to see the values month by month.
For more information refer to "Heat Pump optional functions"
This function can be used to block or limit the heat pump or increase demand due to
electricity availability.
For more information refer to "Heat Pump optional functions"
Air purge function drives the pump in a way for evacuating air bubbles in the installation.
For more information refer to "Heat Pump optional functions"
Test run is a working mode used when commissioning the installation. Some settings
are made to let the installer an easy job.
For more information refer to "Heat Pump optional functions"
Night shift operation reduce compressor load in order to reduce environmental noise
during night.
It can be configured as a daily timer or launched from favourite button.
For more information refer to "Heat Pump optional functions"
Explanation
chapter in Service
chapter in Service Manual.
chapter in Service Manual.
chapter in Service Manual.
chapter in Service Manual.
chapter in Service Manual.
chapter in Service Manual.
Model
S/SC/M
A
chapter in
S/SC/M
S/SC/M
A
S/SC/M
S/SC/M
S/SC/M
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