Setpoint Legionella Function; Forced Charging; Protection Against Discharging; Purpose - Siemens RVP360 Basic Documentation

With storage tank
sensor
With thermostat
Flow temperature
64/106
Siemens
Building Technologies

14.11 Setpoint legionella function

Operating line 130 can be used to adjust the setpoint for the legionella function or
to deactivate the function (setting ---).
For a description of the legionella function and related settings, refer to chapter 16
"Function block: Legionella function

14.12 Forced charging

Operating line 131 can be used to select whether or not forced charging of the
storage tank shall take place every day when d.h.w. heating is released for the first
time.
With forced charging, the storage tank is also charged when the d.h.w. temperature
lies between the switch-on and switch-off temperature. The switch-off point
remains the same.
If d.h.w. heating is released for 24 hours a day, forced charging takes place very
day at midnight.

14.13 Protection against discharging

14.13.1 Purpose

With plant types that use a d.h.w. storage tank, protection against discharging is
ensured during overrun of the d.h.w. charging pump.
This function makes certain that the d.h.w. does not cool down during the time
pump overrun is performed.

14.13.2 Mode of operation

If the flow temperature lies below the storage tank temperature, pump overrun is
ended prematurely.
Depending on the type of plant, the flow temperature is acquired with sensor B2
or obtained via data bus (LPB) as the common flow temperature.
If the flow temperature lies below the d.h.w. setpoint temperature, pump overrun
is ended prematurely.
The flow temperature is acquired with sensor B2 or obtained via data bus (LPB)
as the common flow temperature, depending on the type of plant.
The flow temperature is ascertained as follows, depending on the type of plant:
Plant type Controller with bus connection (LPB)
4–1 Common flow temperature of the same segment via data bus.*
Otherwise, there is no pump overrun due to protection against
discharging
5–1 Sensor B2
6–1 Sensor B2
Basic Documentation RVP360
14 Function block: D.h.w.
CE1P2546en
2017-07-24