Samson 5476 manual Thermal disinfection of the DHW storage tank, Functions of the DHW circuit

Functions of the DHW circuit

Set-back difference by set-back of the current flow temperature.

The amount of time in which the priority for the DHW circuit is given is set in the Priority in case of deviation parameter.

Function	WE	Configuration
Priority for	OFF	FB8 = ON, Ab
DHW circuit	10 min	Priority in case of deviation / 2 to 10 min

6.10 Forced charging of the DHW storage tank (Anl 2, 3, 5, 7, 8 and 9)

This function is always configured when the system has at least one storage tank sensor.

To provide the full room heating performance when the time-of-use of the heating circuits be- gins, existing storage tanks are charged one hour before the time-of-use of the heating circuits starts.

6.11 Thermal disinfection of the DHW storage tank

In all systems with DHW heating, the DHW storage tank is thermally disinfected on a selected day of the week or every day. The storage tank is heated up to 70 °C. Thermal disinfection starts at 0.00h and finishes at 4.00h at the latest.

Thermal disinfection for preventing legionella infection causes

￿high return flow temperatures during the disinfection cycle (return flow temperature limita- tion suspended),

￿high storage temperatures after thermal disinfection has been concluded,

￿lime scale (possibly), which can have a negative effect on heat exchanger performance.

Note!

This function is not available when a storage tank thermostat is used.

Function	WE	Configuration
Thermal disinfection	OFF	FB7 = ON
	3 (Mi)	Day of the week / 1–7 = daily, 1, 2 to 7 = Mon, Tue to Sun

56EB 5476 EN