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Siemens
User Manual
CE1U2353en
Building Technologies
Configuration
2014-07-30
Excess heat discharge
Active dissipation of excessive heat enables an external heat source to force
consumers (heating circuit, DHW storage tank, Hx pump) to draw excessive heat by
delivering a forced signal.
The parameter “Excessive heat draw“ can be used to determine for every consumer
whether or not it should take account of the "forced" signal, and hence whether or not
that consumer should participate in the dissipation of heat.
·
Local effect
When using LPB device address 0 or >1, excessive heat dissipation only acts on the
local consumers connected to the controller.
·
Central effect (LPB)
When using LPB device address = 1, excessive heat dissipation also acts on the
consumers connected to the other controllers in the same segment.
The distribution of excessive heat from segment 0 across other segments of the system
is not possible.
Dew point monitor
The dewpoint monitor detects the formation of condensate. If the dewpoint monitor
responds to condensation, the cooling switches off immediately.
The cooling is enabled when the monitor is no longer signalling condensation and when
a definable "locking time" (operating line 946) has expired.
Flow setpoint increase, hygrostat
If the hygrostat responds, the flow setpoint is increased by the fixed value defined in
"Flow setpt increase hygro" (operating line 947). As soon as the hygrostat reverts to
normal, the flow setpoint returns to the "normal value".
Refrigeration demand
The refrigeration demand is transmitted to the refrigeration generating plant via a
contact.
The setpoint must be set via operating line 5952.
Heat request 10 V
Heat generation receives heat requests in the form of voltage signals (DC 0...10V).
The linear characteristic curve is defined via two fixed points (voltage value 1 / function
value 1 and voltage value 2 / function value 2).
Refrig demand 10V
Refrigeration generation receives the refrigeration demand in the form of a voltage
signal (DC 0...10 V).
The linear characteristic curve is defined via two fixed points (voltage value 1 / function
value 1 and voltage value 2 / function value 2).
Pressure measurement 10V
The voltage signal present at input H… is converted into a linearized pressure value.
The linear characteristic curve is defined via two fixed points (voltage value 1 / function
value 1 and voltage value 2 / function value 2).
Relative room humidity 10V
The voltage signal present at input Hx is converted into a linearized relative humidity
value. This is used for the dewpoint calculation and dewpoint protection functions of the
cooling circuit and for control of the dehumidifier.