Antifreeze Protections; Deactivation And Switching Off For Long Periods - Olimpia splendid SHERPA AQUADUE S2 BIG Instrucciones Para La Instalación, Uso Y Mantenimiento

During the production of domestic hot water with the main heat pump, the system produces as much
power as possible to quickly meet the request for domestic hot water.
The request for domestic water can occur in the follow manners:
• Through DHW/L contact and setting parameter ADDR228=1; in this case, set the external thermostat at
a temperature lower than 70°C.
• Through a temperature sensor inserted in the domestic hot water reservoir setting parameter A DDR228=2;
in this case, the set point is determined by parameter ADDR210.
With parameter ADDR228=0, the production of domestic hot water is disabled.
With parameter ADDR238 it is possible to change the hysteresis cycle of the domestic water temperature check.
The temperature sensor T3 supplied in the internal module must always be inserted in and connected
to the domestic hot water reservoir.

7.2 - ANTIFREEZE PROTECTIONS

The brazed plate exchanger of the main circuit and the evaporator of the heat pump for domestic hot water
production at high temperature in the internal unit are protected against breaking in case of frost by a flow
switch which stops the operation of the system when water flow rate is insufficient and by the temperature
sensors on the exchanger.

7.3 - DEACTIVATION AND SWITCHING OFF FOR LONG PERIODS

To deactivate the heat pump, proceed as follows:
• Press the icon Stand by
• Cut off power to the external unit.
This way, the anti-blocking function of the circulation pump remains active.
The non-use of the heat pump for a long period of time entails that the following operations must be carried out:
• Press the icon Stand by
• Disconnect all power supplies of the internal unit through the main switches.
• Disconnect all power supplies of the external unit through the main switches.
To restart the air-water heat pump after a long period of inactivity of the heat pump, it is advised to rely
on the Technical Assistance Service.
on the display.
on the display.
EN - 41
AQUADUE BIG