STIEBEL ELTRON SOM 10 - Manual (Page 57)

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57
In addition to the pre-defined optional functions, func-
tion blocks consisting of thermostat functions, timer
and differential functions are available. With the help
of these function blocks, further components, resp.
functions can be controlled.
To each function block, sensors and free relays can be
allocated. Sensors already in use can be allocated again
without impeding their control functions.
Within a function block the functions are intercon-
Function block
Function Function block 1
Relay 3
Thermostat
thermostat a- S3
thermostat b- S4
Differential function ∆T ∆T
Sen. 1
Sen. 2
Timer Timer
Tha-S3 Thb-S4 ∆T-S3>S4 Timer R3
nected (AND gate). This means that the conditions
of all the activated functions have to be fulfilled (e.
g. thermostat and timer) for switching the allocated
relay. As soon as one condition is not fulfilled, the relay
is switched off.
Thermostat function
The relay allocated to the function block is switched
on, when the adjusted switch-on temperature (Th(x)
on) is reached. It is switched off when the adjusted
switch-off temperature (Th(x)off) is reached. The
switching conditions of all other activated functions of
the function block have to be fulfilled as well.
Allocate the reference sensor in the expert menu.
Adjust the maximum temperature limitation with
Th(x)off > Th(x)on and the minimum temperature
limitation with Th(x)on > Th(x)off. The temperatu-
res cannot be set to an identical value.
∆T-function
The relay allocated to the function block is switched
on as soon as the adjusted switch-on temperature
difference (∆Th(x)on) is reached. It is switched off
as soon as the adjusted switch-off temperature dif-
ference (∆Th(x)off) is reached. The switching condi-
tions of all other activated functions of the function
block have to be fulfilled as well.