Pressure switch shutdown
(2500)
With this parameter the maximum fan output for the DHW mode can be restric-
ted. This function checks the static water pressure with the aid of the connected
water pressure switch. Depending on the set option (
start prevention
or
lockout
position
) with shutdown either a start prevention or lockout position occurs with
the corresponding diagnostics.
A closed water pressure switch releases the commissioning on the burner control
and the actuation of the pumps. With open pressure switch only after the adjus-
table holding time is a start prevention or lockout position triggered.
The pump actuation is also locked for protection against dry running. If the water
pressure increases again and the switch closes again , with a start prevention the-
se are automatically again cancelled and the pump actuation is again released.
Cascade
Lead strategy
(3510)
Considering the specified output range the heat generation is switched on and
off acc. to the set lead strategy. To switch off the effect of the die output range,
the limits must be set to 0% and 100% and the lead strategy to late on, late off.
-
Late on, early off
: additional boiler is switched on as late as possible (output
range max) and back off as early as possible (output range max). I.e. boiler in
operation as little as possible, or short running times for additional boiler.
-
Late on, late off
: additional boiler is switched on as late as possible (output ran-
ge max) and back off as late as possible (output range min). I.e. as few as pos-
sible on and off processes as possible for the boiler.
-
Early on, late off
: additional boiler is switched on as early as possible (output
range min) and back off as late as possible (output range min). I.e. boiler in ope-
ration as much as possible, or as long as possible running times for additional
boiler.
Release integral source seq
(3530)
A value generated from temperature and time. The following boiler will be swit-
ched on in case of exceeding the set limit. .
Reset integral source seq
(3531)
The following boiler will be switched off in case of exceeding the setpoint
Restart lock
(3532)
The restart lock prevents switching back on of a switched off boiler. Only after the
set time period has elapsed is it again released. This prevents too frequent swit-
ching on and off of the boiler and achieves a stable operating condition of the
system.
Switch-on delay
(3533)
Too frequent forward and back switching (cycles) of the boiler are avoided by the
switch-on delay and therefore a stable operating state is ensured.
Auto source seq ch'over
(3540)
The sequence of lead boiler and following boiler is defined by the source sequen-
ce changeover and in this way, the utilisation of the boilers in a cascade is influ-
enced. After the set time has elapsed, the boiler sequence will be changed. The
boiler with next higher device address operates as lead boiler.
Auto source seq exclusion
(3541)
-
None
: After the set time has elapsed, the boiler sequence will be changed.
-
First
: the first boiler in the addressing works as the lead boiler; for all other boi-
lers, the boiler sequence is changed after the time set in prog.no. 3540 has elap-
sed.
-
Last
: the last boiler in the addressing always remains as the last boiler; for all
other boilers, the boiler sequence is changed after the time set in prog.no. 3540
has elapsed.
Programming
358 488 09.10
Gas-fired fuel value boiler EuroCondense three 125-300 kW
51
Summary of Contents for Eurocondense three
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