Siemens QAA55 series User Manual

Handling
3
QAA75... / QAA78… / AVS37…
47
Siemens Operator / Room / Auxiliary devices CE1U2358en_04
Building Technologies 2014-09-26
The button is used to set DHW heating mode.
The following functions are available, depending on whether it is a DHW storage
tank or instantaneous DHW heater:
Plant type
Operating
mode
Press button Display
DHW storage
tank
On. 1x 1. bar to the left (under DHW symbol).
Off 2x No bar.
Instantaneous
heater.
On. 1x 1. + 2. Bar left
ON ECO 2x 1. bar to the left (under DHW symbol).
Off 3x No bar.
DHW mode
On: The DHW is treated according to the selected switching program. Keep hot
function is generally released.
On Eco: Same as operating mode "On", but: Keep hot function is off.
Off: No DHW heating, but the protective function is active.
The keep hot functi
on maintains the temperature of the instantaneous DHW
heater so that warm water is quickly available the next time the facet is turned on.
The DHW push function is only available for the DFW storage tank.
The DHW push is triggered by pressing the DHW mode button for an extended
period (> 3 seconds).
DHW push initiates a single DHW charging cycle to the nominal setpoint. The push
is active until the nominal DHW setpoint is reached.
DHW push can also be started when:
l DHW mode is "off".
l Operating mode changeover is effected via H1 or centrally (LPB)
l All heating circuits use the holiday function
NOTICE
Once triggered, the DHW push cannot be cancelled via the operator unit.
Selecting DHW heating
DHW push

Siemens QAA55 series Specifications

General

Brand	Siemens
Model	QAA55 series
Category	Controller
Language	English