Service Level; Change Password; Building Time Constant - Siemens IQHeat User Manual

IQHeat
User manual

9 Service level

NOTE: The following settings and tests require logging in at Service level.
9.1

Change password

9.2

Building time constant

Different building temperature inertia gives different sensitivity to rapid changes in the outside temperature.
The inertia is affected by insulation, wall thickness, material and heating systems.
The value is used to calculate how the current outside temperature affects the indoor temperature, and thereby
how the heating will be affected to provide the best comfort and economy. The building time constant is used to
calculate the parameter "calculated outside temperature."
Typical values for setting the building time constant.
Thick walls, Stone building
Modern light building with good insulation
Light building, thin insulation
1. From the Main index select Systemobjects.
2. Now select Password handling > Change
password.
3. Select the password to be changed and press OK.
30-60 hours.
20-50 hours
10-20 hours
1. From the Main index select Commissioning.
2. Now select Plant settings > Heating circuit 1
> Calc.Outside temp.
3. In the Calc.outside temp. menu select the
parameter to be changed and press OK.
4. After each parameter change, press OK to save
the new setting.
Parameter Settings range
0...200 t
Build.time
const
Reset Apply
outs.temp
24
Explanation
Building time
constant
Resets the
dampened
outside
temperature, and
sets it to the
current outside
temperature