SystemAir SYSCROLL Air Serie Manual De Instalación Y De Mantenimiento página 29

Additional heating device kit
It is provided as an option/accessory to allow the unit managing the
control of an additional heating device (a boiler in example), in order
to integrate the production of hot water.
Connect the relais to terminal DO5-12V of the electrical box (refer to
Chapt. 4).
7 - Product Description
27
VALVE
BOILER
WATER
PROBE
DHW
DCW