Centrometal PelTec 12-48 Technical Instructions page 31

Temperature (configuration BUF--IHC || DHW )
2.4 TEMPERATURE DHW
Possible selection:
default: 50°C
Minimum: 40°C
Maximum: 80°C
Temperature setting options of DHW (domestic hot water).
2.5 DIFFERENCE DHW
Possible selection:
default: 5°C
Minimum: 4°C
Maximum: 40°C
The possibility of setting domestic hot water diference.
Technical instructions REGULATION PelTec / PelTec-lambda 31