Samson TROVIS 5400 Series Mounting And Operating Instructions page 23

At 5K above the charging setpoint value (measured at flow sensor VF), at the latest after three minutes,
the changeover valve begins to conduct the heating medium in the direction of the storage tank.
The UP must continue to run for storage tank charging! The ZP runs according to the function
block setting.
If the changeover valve is is a motor valve, a limit switch at the drive can be used to conduct part
of the heating medium to the heating loop during storage tank charging.
If the requirement is terminated by exceeding the adjustable differential gap at sensor SF1 or the
preset differential gap at the storage tank thermostat, the controller initially continues to operate
using a fixed definable value at sensor VF. If this is attained, at the latest however after two run-
ning periods of the control valve, the control valve begins to conduct the heating medium in the
direction of the heating loop again. The ZP runs according to a time program.
B) The temperature at the flow sensor is less than the charging temperature setpoint value, but
higher than 40 °C
If the temperature in the storage tank falls below the value for drinking water requirement ON at
sensor SF1 or if the temperature falls below the value set at the storage tank thermostat, com-
mencement of storage tank charging initially only leads to a buildup of the charging temperatu-
re via the heating loop. At 5 K below the charging setpoint value the changeover valve begins to
conduct the heating medium in the direction of the storage tank. The ZP runs according to the
function block setting.
If the requirement is terminated by exceeding the adjustable differential gap at sensor SF1 or the
preset differential gap at the storage tank thermostat, the controller initially runs at a fixed defi-
nable value at sensor VF. When this is attained, at the latest after two running periods of the con-
trol valve, the changeover valve begins to conduct the heating medium in the direction of the
heating loop again. The ZP runs according to a time program.
C) The temperature at the flow sensor is less than 40 °C
A drinking water requirement leads to an immediate buildup of the charging temperature via
the storage tank, i.e. the changeover valve begins to conduct the heating medium in the direction
of the storage tank. The ZP runs according to the function block setting.
If the requirement is terminated by exceeding the adjustable differential gap at sensor SF1 or the
preset differential gap at the storage tank thermostat, the controller operates again according to
the heating characteristic; while the control valve is closing, the flow temperature is monitored at
sensor VF. If this is reduced down to a fixed definable value, at the latest however after two run-
ning periods of the control valve, the changeover valve begins to conduct the heating medium in
the direction of the heating loop again. The ZP runs according to a time program.
D) Summertime operation or switched off operation
A drinking water requirement leads to an immediate buildup of the charging temperature via
the storage tank, i.e. the UP is switched on and the changeover valve begins to conduct the hea-
ting medium in the direction of the storage tank. The ZP runs according to the function block set-
ting. When the requirement is terminated the control valve is closed. While the control valve is
closing, the flow temperature is monitored at sensor VF.
If this is reduced down to a fixed definable value, at the latest however after two running periods
of the control valve, the changeover valve switches again and the UP is switched off. The ZP runs
according to a time program.
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