11
Tmin is the set point for supplementary heating, It can be adjusted independently of the DHW set point, The factory setting
for DHW set point “SETPOINT” is 55°C and for “Tmin” 35°C.
The set point temperature can be achieved either by the HP (energy source selection “HP”, “HP + EL”, “HP + boil”) or the
supplementary heating (energy source selection “EL”, “boil”), depending on the choice of the energy source. Tmin is
achieved with heat pump and supplementary heating (energy source selection “HP + EL”, “HP + boil”), if selected.
The heat pump operates with a hysteresis of +1 -3 °C around the DHW set point. The supplementary heating operates with a
hysteresis of + -1 °C.
The DHW HP is equipped with a permanent and an automatic defrosting system. This reduces the need for defrosting and
increases efficiency (increased operation cycle). Nevertheless it is normal, that (especially at low temperatures and in heavy-
duty operation) he evaporator has to undergo a de-icing procedure. When the evaporator temperature gets too low the heat
pump will stop and the defrosting procedure starts automatically. For air defrosting this limit is -8 °C, for hot-gas defrosting
-18 °C. Normal operation resumes at an evaporator temperature of +5 °C.
The LED indicators 29 and 30 of the control panel show the actual operation mode, the upper LED(29) for the heat pump
and the lower LED (30) for supplementary heating:
• Off: Inactive (not selected)
• Orange: Selected, but running standby mode
• Green: Selected and producing DHW.
ELECTRICAL INSTALLATION:
The heat pump is equipped with a 2 metre power supply cord, 3 x 1.5 mm
2
, which comes out on the back of the device with
stress relief and a safety plug.. The socked should be protected individually by an automatic circuit breaker and a residual-
current circuit breaker (30mA)
Max. power input: see “page 4 - technical data”.
Power supply_ 230V AC single-phase, 50Hz
Mains lead colours: phase – brown, neutral – blue, earth – yellow/green
NOTE: The appliance must be installed in accordance with national wiring regulations by a qualified and authorized
installer. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
personnel in order to avoid a hazard.
