Samson trovis 5600, Mounting And Operating Instructions

Page: 69 / 128

Note: The storage tank charging temperatures are adjusted instead of the storage tank temper-
atures in the menu item for DHW set points when a storage tank thermostat is used.
Time-controlled switchover of storage tank sensors
By configuring a second storage tank sensor S8 over the function block DHW–CO4–19 = ON,
it is possible to determine that the storage tank sensor S7 is used for day mode in the DHW cir-
cuit and that the storage tank sensor S8 is used for night mode. As a result, different storage
tank volumes can be kept at a constant temperature according to a time schedule, and also at
different temperatures if the 'DHW day set point' and 'DHW night set point' differ from one an-
other.
Stop storage tank charging
The controller stops charging the storage tank when the water temperature measured at sen-
sor S7 has reached the temperature T = 'DHW day set point' + 'Hysteresis'. When there is no
heating operation or when the flow temperature demand in the system is lower, the correspond-
ing valve is closed. The storage tank charging pump P3 is switched off after 'Lag time for storage
tank charging pump' has elapsed.
The default settings cause the temperature in the storage tank is to increase by 5 °C to reach
60 °C when the storage tank temperature falls below 55 °C. The charging temperature is calcu-
lated from the 'DHW day set point' (55.0 °C) plus 'Charging temperature boost' (10.0 °C),
which equals 65 °C. When the storage tank has been charged, the heating valve is closed and
the charging pump continues to run for the time entered in 'Lag time for storage tank charging
pump'. Outside the times-of-use, the storage tank is only charged when the temperature falls
below 'DHW night set point' (40.0 °C). In this case, the tank is charged with a charging temper-
ature of 50 °C until 45 °C are reached in the tank.
Functions WE Configuration
Storage tank sensor S7 OFF DHW–CO4–01 = ON
Primary valve opened without operation of the storage tank charging pump:
SLP not ON unless return flow hot OFF DHW–CO4–16 = ON
Time-controlled switchover of storage tank sensors:
Storage tank sensor S8 (bottom) DHW–CO4–02 = ON
Scheduled switchover between S7 and S8 OFF DHW–CO4–19 = ON
Parameters WE Parameter settings
Min. adjustable DHW set point 40.0 °C DHW–PA4–01 / 5.0 to 90.0 °C
EB 5610 EN
69
Functions of the DHW circuit