Combination Mode - Hitachi Pc-Arfh2E Installations- Und Bedienungsanleitung

◆ Boiler combination

Combination mode:

• Serial: Boiler operates in series with the heat-pump. The boiler provides additional peak
load capacity and works together with the HP.
• Parallel: Boiler operates in parallel with the heat pump. The boiler provides the full heating
requirements. In case Boiler is ON, HP is not allowed to operate.
Bivalent point:
Boiler is allowed to operate in case ambient temperature is below this value.
Minimum OFF time:
Time that must pass before start boiler after being switched OFF
DHW by boiler:
Control to allow heat DHW by means Boiler (Only for YUTAKI S and YUTAKI H and DHW Tank
Position configured as Post).
Wait time for DHW (Only for YUTAKI S and YUTAKI H):
Delay time to start Boiler for DHW in case all conditions allow Boiler to start after HP has been
started for DHW.
PMEN0597 rev.1 - 06/2023
Supply setting offset:
Setting offset for Boiler. Higher values imply
earlier stoppage of Boiler and vice versa.
Minimum ON time:
Time that must pass before stop boiler after
being switched ON
Waiting time:
Delay time to start Boiler in case all conditions
allow Boiler to start after HP has been started
for Space Heating.
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