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Siemens Room Unit for Boiler Control CE1U2283en
Building Technologies Functions 2015-09-16
6 Functions
The functions described below require no settings. They are performed automati-
cally but have an impact on the plant.
For the rectification of faults, planning and plant maintenance, it may therefore be
very advantageous to know about their impact on plant operation.
6.1 Types of compensation
The room unit offers 3 types of compensation each of which generates the effective
flow temperature setpoint in a different way. They are the following:
– Weather compensation
– Weather compensation with room influence
– Room compensation
– Fix flow temperature setpoint
6.1.1 Weather compensation
With this type of compensation, the building’s heat losses are compensated by an
adequate flow temperature.
The colder the weather, the quicker the building cools down and the greater the
heating circuit’s heat demand.
With this type of compensation, it must be ensured that the heating curve is
correctly set, because the room unit gets no feedback from the space whether
the amount of heat supplied meets the demand of the users.
The room influence (AMBON) must be set to "OFF" and, in addition, an outside
sensor must be connected.
6.1.2 Weather compensation with room influence
Compared to pure weather compensation, this type of compensation offers
enhanced comfort because with the room influence, the room unit gets a feedback
from the space.
The room influence (AMBON) must be activated for the required heating circuits
and, in addition, an outside sensor must be connected.
The room influence acts on the room temperature setpoint. The deviation of
setpoint / actual value of the room temperature is multiplied by the correction factor
KORR/2 and added to the deviation from the room temperature setpoint in the
opposite direction.
Room influence acts:
· In the case of deviations of setpoint / actual value of the room temperature
· With automatic or manual changeover to a higher or lower room temperature
setpoint
Introduction
Description
Prerequisites
Description
Prerequisites
Room influence
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