63
7-2.
Operation Mode
and Control
Method
Related DN
8) Hot water boost operation
A Hot water boost operation heats the water quickly to the set temperature TSC_H = 75°C (DN_09).
1) How to operate
• When hotwater boost “ON” after pressing the remote controller [
] button, a heat pump operation in progress in
the heating side switches to in the hot water side, and continues the operation regardless of the hot water supply start
condition, TTW < 38°C. In addition, the hot water cylinder heater is immediately energized to start a Hot water supply
operation under TSC_H = 75°C.
• A Hot water boost operation returns to the usual operation after 60 minutes passed or reached 75°C.
• The remote controller display during a Hot water boost operation is the same as the set temperature display of a
usual Hot water supply operation.
• The usual set temperature change is used for changing the set temperature during a Hot water boost operation.
Change the BOOST set temperature with DN_09, if necessary.
Related DN
Item Operation flow and applicable data, etc.
DN Setting item Default Variable range
23 Boiler-heat pump switching temperature -10°C -20 - 20°C
3E Control priority between the hydro unit and boiler
(Control valid for operating heat pump mode)
0: Hydro unit control Independent temperature
control for the hydro unit
and boiler
5B Coordination of the boiler and heat pump 3: Boiler only (Pump OFF) 0: Boiler and Heat pump
1: Boiler only
2: Heater only
62 Activate/deactivate A02 error detection 0: Activate 1: Deactivate
75
°C
hot water operation (DN_09)
Switches to Hot water
supply operation
60 minutes operating time (DN_08)
Usual operation
HOT WATER button set to "ON"
Hot water boost button set to "ON"
Current heat pump
operation
Heating side
Hot water
supply side
DN Setting item Default Setting available range
09 Hot water boost set temperature 75°C 40 - 80°C
08 Hot water boost operation time 60 min 30 - 180 min
Every 10 min
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