Complementary Heating Configuration - Hitachi YUTAKI RWM-2R1E Installation & Operation Manual

YUTAKI CASCADE CONTROLLER ATW-YCC-(01-02)

10.6.2.6 Complementary Heating configuration

Solar combination:
The solar combination will enable you to heat
up your domestic water by means of the sun
whenever the sun is available.
Set input 4, output 4 and sensor (see section
"10.6.2.9 Setup of inputs, outputs and
• Disabled: No solar Kit is installed.
• Input Demand: Alternative DHW tank operation is done by solar system or
YUTAKI unit. Solar input can disable DHW operations done by YUTAKI unit.
- DHW Hysteresis (OFF, 35 ~ 240 min)
- DHW Maximum Time (5 ~240 min)
• Total Control: YUTAKI units controls the solar operation for the system, based
on different temperatures: DHWT is heated by either the hot water that comes
from the solar panels or the hot water that comes from the heat pump, depending
on the solar temperature. See detailed information in
control".

Electrical heater
Proportional band:
• Control to determine how fast setting
temperature is going to be reached.
Higher values imply fast achievement
of water setting point and therefore
higher utilization of heater.
Reset factor:
• Used to guarantee setting temperature
achievement without surpassing
its value. Higher values imply less
utilization of heater.
Waiting time:
• Delay time to start Electric Heater
in case all conditions allow Electric
Heater to start after HP has been
started. Only in case of Backup option.
257 PMML0575 rev.2 - 03/2022
sensors")
"Solar combination - Total
Heating Source:
• HP Only
• HP + Heater
• HP + Boiler
• HP + Heater + Boiler (Only for YUTAKI S
and YUTAKI S COMBI)
Electrical heater: (Only when heating source
is configured as HP+Heater or HP+Heater +
Boiler). See detailed information in
heater"
Boiler combination: Boiler will only operate if
unit is in Space Heating or Hot Sanitary Water
modes. It will always be disabled in any other
mode (Swimming Pool and Cooling mode).
Set output 3 and sensor 1 for boiler (see
section "10.6.2.9 Setup of inputs, outputs and
sensors")
See detailed information in
Operation:
• Starting: Space Heating electric Heater is switched ON in
case of low water temperature and low ambient temperature
to provide extra capacity to HP.
• Backup: Space Heating Electric Heater is switched ON
in case of low ambient temperature (below Bivalent point)
in order to provide extra capacity to HP at coldest days of
winter.
Bivalent point:
• Electric heater is enabled to operate in case ambient
temperature goes below this value. Only in case of Backup
option.
Supply setting offset:
• Setting offset for electric Heater. Higher values imply earlier
stoppage of electric heater and vice versa. Only in case of
Backup option.
Inter stage time:
• Time of Electric Heater phase overlapping when there is
switch ON/OFF transition from/to phase 1 to/from phase 2.
Only in case of Backup option.
"Electrical
"Boiler combination"