Samson TROVIS 5431, Mounting And Operating Instructions

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5.5.10 Times-of-use for the drinking water heating system (PA2)
See chapter 5.3.6
5.5.11 Vacation and public holidays for drinking water heating (CO2
F07)
This function can be selected for systems 2 to
5. If you set CO2 F07-1, the vacation and
public holidays entered for the heating circuit
apply to the drinking water heating system
as well. On public holidays, the times-of-use
for the drinking water heating system are
then based on Sundays. During the vacation,
the drinking water heating system is
deactivated.
5.5.12 Control in systems with an instantaneous water heater (CO2 F11)
This function can only be selected for system
5. The control of the drinking water heating
system requires that FS2 be used (CO2
F11-1). FS2 always requires a fast
responding Pt1000 sensor, regardless of
which sensor was selected in CO-SYS F02.
If FS2 is deactivated (CO2 F11-0), a thermo-
stat can be used instead. It controls the pri-
mary on-off valve directly.
5.5.13 Recognition of drinking water tapping in systems with an instanta-
neous water heater (CO2 F12)
This function can only be selected for system
5 with the control via FS2 (CO2 F11-1).
The control quality can be improved for this
system, if drinking water tapping is regis-
tered independently of FS2, either via hydrau-
lic pressure switch (HPS) in the cold water
supply line or via return flow sensor for the
drinking water (RfSDW). For this purpose,
you must activate CO2 F12-1, and then
select “1” for the HPS or “2” for the RfSDW.
The optimum setting is with the HPS because
it registers both the beginning and the end of
the drinking water tapping. It issues a binary
signal: contact is made when drinking water
is tapped, otherwise it is open. The HPS is
connected to clamps 14 and 7.
When using a RfSDW, the end of the drin-
king water tapping is recognized. At the
same time, the controller limits the return flow
temperature.
EB 5431 EN
51
Functional descriptions