Siemens Albatros2 AVS37 User Manual Page 114

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Configuration 23. August 2007
Heating Cooling Heating and cooling
Q2
HC/CC
T
B1
Y1/Y2
Y21
H
C
Q2
HC/CC
T
B1
Y1/Y2
Y21
H
C
The setting is required when a QX… relay output (configuration) is used as a diverting
cooling valve Y2.
DHW sensor B3
Line no. Operating line
5730 DHW sensor B3
Sensor
Thermostat
Sensor
The collector calculates the switching points including the switching differential from the
DHW setpoint and the acquired DHW storage tank temperature.
Control thermostat
The DHW temperature is controlled based on the switching state of a thermostat
connected to B3.
When using a DHW thermostat, Reduced mode is not possible. This means that when
Reduced mode is active, DHW heating with the thermostat is locked.
The adjustment of the nominal DHW temperature setpoint must be equal to or higher
than the setpoint adjustment on the thermostat (thermostat calibrated at switch-off
point)
The flow temperature setpoint for DHW must be set to a minimum of 10 °C (has an
impact on the charging time).
In that case, the DHW is not protected against frost.
DHW control element Q3
Line no. Operating line
5731 DHW actuating device Q3
None
Charging pump
Diverting valve
None
No DHW charging via Q3.
Charging pump
The DHW is charged with a pump connected to terminal Q3/Y3.
Diverting valve
The DHW is charged with a diverting valve connected to terminals Q3/Y3. With this
setting, pump Q2 becomes a boiler pump, provided the boiler pump is not yet defined
for use at a multifunctional relay output QX...
Use of mixing valve 1
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