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Siemens Building Technologies
Basic Documentation QAA73.110 Room unit
CE1P2284en
HVAC Products
Description
of the heating engineer settings
10.07.2002
On HC1
Room influence acting on heating circuit 1: The measured room
temperature has an impact on temperature control of heating circuit 1
(OpenTherm Lite mode)
On HC2
Room influence acting on heating circuit 2: The measured room
temperature has an impact on temperature control of heating circuit 2
On HC1+HC2
Room influence acting on heating circuits 1 and 2:
The measured room temperature has an impact on temperature
control of both heating circuits
Deviations of the actual room temperature from the setpoint are acquired and taken into
account by temperature control.
To be able to use the control variant "Weather compensation with room influence", the
following conditions must be satisfied:
•
An
outside sensor
must be connected to boiler control
•
Room
influence
must
be enabled to act on the relevant heating circuits
•
There
may
be
no thermostatic radiator valves
in the reference room (If such
valves are present, they must be set to their fully open position).
4.17 Switching differential of the room
temperature
It is used for room temperature limitation. This function is recommended for pump
heating circuits and prevents the rooms from getting overheated.
1. Press the line selection buttons to select line 76.
2. Press the + / – buttons to set the room temperature switching differential.
Setting range
Unit
Factory setting
– – . –
0.5...4.0
–
°C
0.5
The switching differential for 2-position control will be changed.
Entry:
– – . –
Switching differential is inaktiv
•
The pump always remains activated
Decrease:
Switching differential will become smaller
•
The pumps are switched on and off
more often
•
The room temperature varies within a
narrower
band
Increase:
Switching differential will become greater
•
The pumps are switched on and off
less often
•
The room temperature varies within a
wider
band
Room influence
Description
Line 76
Effect
