Setpoint Of The Legionella Function; Dwelling Time At Legionella Function Setpoint; Effect Of Legionella Function On The Circulating Pump - Siemens ALBATROS QAA73.110 Basic Documentation

Effect
Note
Description
Line 131
Effect
Description
Line 132
Effect
Description
Setting on operating
line 133
Effect
è Important
Siemens Building Technologies
HVAC Products
The setting will ensure maximum limitation of the nominal d.h.w. temperature setpoint.
A d.h.w. setpoint maximum (TBWmax) of a BMU transmitted via OpenTherm is given
priority and replaces that of the controller (setting 130).
5.8

Setpoint of the legionella function

The setpoint of the legionella function is an adjustable temperature level to which the
d.h.w. temperature is raised when the legionella function is activated, aimed at killing
any legionella viruses that may have occurred.
1. Press the line selection buttons to select line 131.
2. Press the + / – buttons to adjust the required setpoint.
Setting range
8...95
The setting changes the d.h.w. setpoint during the period of time the d.h.w. is heated
up as a result of the legionella function.

5.9 Dwelling time at legionella function setpoint

The setpoint of the legionella function (operating line 92) is maintained for at least the
period of time set here.
Setting range
0...360
The dwelling time starts as soon as the legionella setpoint is reached.
During the entire dwelling time, the temperature may not fall below the legionella
setpoint by more than the set BMU d.h.w. switching differential (standard setting LMU).
The legionella function is terminated when this criterion is met.
5.10 Effect of legionella function on the circulating
pump
Flushing the circulation piping ensures that the legionella viruses will also be killed in
that part of the plant.
Setting range
No / yes
No The circulating pump does not run during the time of the legionella
function.
Yes The circulating pump runs during the time of the legionella function, even
if it would not be allowed to run based on control of the d.h.w. circulating
pump (setting 94).
If this function is deactivated, there is a risk that legionella viruses will return from the
circulation piping to the d.h.w. storage tank right after the storage tank has been
thermally desinfected.
Basic Documentation QAA73.110 Room unit
Description of the OEM settings
Unit
°C
Unit
min
Unit
Factory setting
65
Factory setting
0
Factory setting
Yes
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CE1P2284en
10.07.2002