Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Configuration 23. August 2007
Building and room model
Line no. Operating line
6110 Time constant building
When the outside temperature varies, the room temperature changes at different rates,
depending on the building's thermal storage capacity.
The above setting is used to adjust the response of the flow temperature setpoint when
the outside temperature varies.
•
Example:
> 20 hours
The room temperature responds
more slowly to outside temperature variations.
10 - 20 hours
This setting can be used for most types of buildings.
< 10 hours
The room temperature responds
more quickly to outside temperature variations.
Frost protection for the plant
Line no. Operating line
6120 Frost protection plant
The pumps are activated depending on the current outside temperature, even if there
is no heat request.
Outside temperature Pump Diagram
...-4 °C Continuously on ON
-5…1.5 °C On for 10 minutes at 6-hour intervals
Cycle (takt)
1.5 °C... Continuously OFF OFF
-2
2371Z30
TA °C
OFF
01234-3-4-5-6 -1
takt
ON
External requirements
Line no. Operating line
6128 Heat request below OT
6129 Heat request above OT
6131 Heat req in economy mode
Off ¦ On DHW ¦ On
The heat source (K27 with QX… or output UX) is put into operation only if the outside
temperature lies below / above the threshold.
Economy mode can be selected from menu ”Special operation / service” (operating line
7139).
In Economy mode, the heat source (K27 with QX.. or output UX) operates as follows:
Off: Remains locked
Only DHW: Released for DHW charging
On: Always released.
Heat request below OT
Heat req in economy
mode