Standard Mode - Hitachi YUTAMPO Series Service Manual

3 Control functions
DHW Heater function

3.4.2 Standard mode

20 SMGB0135 rev.0 - 06/2020
DHW heating operation starts when the temperature of the
water in the tank is low enough to start up the heat pump.
DHW is heated up with the heat pump or the electrical
heater (if the water setting temperature is up to 55ºC).
• High Efficiency: Compressor operation is adjusted to
optimal efficiency for lower power consumption. If the
water setting temperature is up to 55 ºC, the electrical
heater starts when heat pump stops.
• High Speed: The heat pump is switched to maximum
operation capacity to heat up the tank in the shortest
time. If the water setting temperature is up to 55 ºC, the
electrical heater starts when heat pump stops.
If the setting temperature has not been reached for a
specific period of time (EH waiting time), the electric
heater starts to achieve this temperature.
Setting for domestic hot water temperature selected by
the user. The maximum value of this setting depends on
the Maximum Setting temperature set by the installer.
(Between 30 to Maximum Setting temperature.)
Maximum value of DHW setting temperature permitted
by the installer. (Between 40 ºC to 55ºC or 75ºC when
"Electrical Heater" is enabled.)
Hysteresis for the start of DHW heating operation with
the heat pump