Hitachi RAS-3WHVRP Technical Catalogue

10 Optional functions
Indoor unit
TCGB0123 rev.2 - 10/2019
127
10
10.1.2.3 Optional functions for Heat pump
Optional function Explanation Model
Hydraulic separator
combination
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 congured 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” chapter in Service
Manual.
S/SC/M
Electrical heater or boiler
emergency mode
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 conguration must be done from the Unit controller
For more information refer to “Auxiliary electric heater for space heating” chapter in
Service Manual.
A
Power meter data control
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” chapter in Service Manual.
S/SC/M
Capacity data control
Due to usage of Water temperature inlet and outlet + water ow 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” chapter in Service Manual.
S/SC/M
Smart Function
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” chapter in Service Manual.
A
Air Purge
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” chapter in Service Manual.
S/SC/M
Unit Test Run
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” chapter in Service Manual.
S/SC/M
Night shift
Night shift operation reduce compressor load in order to reduce environmental noise
during night.
It can be congured as a daily timer or launched from favourite button.
For more information refer to “Heat Pump optional functions” chapter in Service Manual.
S/SC/M

Hitachi RAS-3WHVRP Specifications

General

Brand	Hitachi
Model	RAS-3WHVRP
Category	Heat Pump
Language	English