Samson TROVIS 5431, Mounting And Operating Instructions

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5.5 Drinking water heating system (systems 2 to 5)
5.5.1 Storage tank sensor/Storage tank thermostat (CO2 F01, F02)
With systems 2 to 4, the drinking water heat-
ing system can be optionally equipped with
one or two storage tank sensors, or with one
storage tank thermostat.
If F01-1 and F02-0 are set, you have
selected one storage tank sensor STS1 . For
this version, you are required to set the
parameters ‘Drinking water demand ON’,
‘Differential gap’ and ‘Charging set point’ on
the parameter level PA2. The parameter
‘Drinking water demand ON’ determines the
temperature at which the charging of the stor-
age tank starts. If this temperature plus the
differential gap are exceeded, the storage
tank charging process ends. The parameter
‘Charging set point’ determines the set point
during the drinking water heating process.
Depending on the configuration, this can be
the set point either for FS1 or FS2.
To select two storage tank sensors STS1 and
STS2 , set F01-1 and F02-1. On the parame-
ter level PA2, you are required to set the
parameters ‘Drinking water demand ON’,
‘Drinking water demand OFF’ and ‘Charging
set point’. The parameter ‘DW demand OFF’
indicates the temperature at which the stor-
age tank charging ends.
First set F02-0 and then F01-0 to select the
storage tank thermostat . It is connected to
the STS1 connection and activates/deacti-
vates the storage tank charging process. On
the PA2 level, you only have to define the
parameter ‘Charging set point’.
5.5.2 Forced charging of drinking water storage tank
Systems 2 and 3 are equipped with this
function, provided that at least one storage
tank sensor exists (CO2 F01-1). If the
time-of-use of the drinking water heating sys-
tem and the beginning of the heating sys-
tem’s time-of-use overlap, the forced char-
ging of the drinking water storage tank is in-
itiated one hour prior to the start of the hea-
ting system’s time-of-use (i.e. prior to the
start of the preheating phase in Optimize
mode), provided that the storage tank is not
fully charged.
EB 5431 EN
47
Functional descriptions