Processing Of External Demand In Rk1 - Samson TROVIS 5575 Mounting And Operating Instructions

System-wide functions
It remains active, however, in any case for processing of external demand. The control circuit
can be released via the binary input when the binary input is either open (bE = 0) or closed
(bE = 1).
Note!
In systems with supplementary heating circuit without a valve (Anl 2.x, 4.x), BE1 only influen-
ces the operation of this heating circuit. In system Anl 3.0, BE1 influences the operation of
the entire controller (except for processing of an external demand).
Functions
Release Rk 1 at BE1
Release Rk 2 at BE2
7.9

Processing of external demand in Rk1

The controller can process binary or analog requests for an externally required signal by a
more complex secondary system, provided the following requirements are met: the system is
configured without storage tank sensor SF2 or room sensor RF2 and an analog request can
be matched to "0 to 10 V corresponds with 0 to 120 °C flow temperature". In other words:
flow temperature demand 12 °C/V. Analog requests below 10 °C (< 0.8 V input signal) are
not processed; overvoltage generates a maximum flow set point of 130 °C. An additional
processing of requests for an externally required signal over the device bus can be config-
ured.
Note!
Overheating may occur in the heating circuits of the primary controller without control valve.
Excessive charging temperatures in DHW circuits without control valve controlled by the pri-
mary controller are excluded when the default settings of the controller are used: while stor-
age tank charging is active, no flow temperature higher than the charging temperature is ad-
justed by the primary controller. Nevertheless, if the Priority for external demand function is
activated, the external demand is also processed during storage tank charging.
Function
Priority for external demand
78
EB 5575 EN
WE Configuration
0 CO1 -> F14 - 1
1 bE = 1, 0
0 CO2 -> F14 - 1
1 bE = 1, 0
WE
0
Configuration
CO4 -> F16 - 1