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IGain
for
PI
‐
regulator
to
pwm
charge
pump
Integral
part
for
the
regulator.
This
part
will
increase
the
regulator
signal
every
15
seconds
as
long
as
the
set
value
isn’t
reached.
If
increased
to
much
overshooting
will
be
the
result.
Minimum
allowed
flow
for
pwm
charge
pump
The
charge
pump
has,
dependent
on
the
hydraulic
installation,
a
minimum
flow
that
can
be
achieved.
Long
pipe
installations
and
bows
will
increase
the
pressure
drop
and
thereby
the
minimum
flow
might
be
necessary
to
increase.
(Observe
that
the
setting
is
only
a
estimation
of
the
flow)
Accumulator
tanks
Following
settings
is
available
>
Restart
hysteresis
tank
1
Restart
hysteresis
tank
2
Tempdiff
between
heat
pumps
Step
time
between
heat
pump
Max
temp
diff
tank
1/heat
pump
Max
temp
diff
tank
2/heat
pump
Max
operation
time
tank
1
Max
operation
time
tank
2
Restart
hysteresis
tank
1
The
set
value
for
tank
1
will
differ
depending
on
the
set
heating
curve
(or
minimum
allowed
temperature).
The
restart
hysteresis
is
the
temperature
that
the
tank
temperature
has
to
drop
before
restart
of
the
heat
pump
will
be
true.
If
for
example
the
setting
is
4,5C
and
the
nominal
value
calculated
by
the
heating
curve
is
39,2C,
then
restart
of
first
heat
pump
will
be
true
at
tank
temperature
39,2
‐
4,5=34,7C
Restart
hysteresis
tank
2
Same
analogy
as
restart
hysteresis
for
tank
1
Tempdiff
between
heat
pumps
As
described
in
“Restart
hysteresis”
the
first
heat
pump
(with
least
operation
time)
will
start
when
the
tank
temperature
reaches
“tank
temp”
‐
“restart
hysteresis”.
Second
heat
pump
(if
installed)
will
start
if
the
temperature
decreases
from
this
point
‐
set
value,
i.e.
“tank
temp”
‐
“restart
hysteresis”
‐
“set
value”
The
same
is
true
for
remaining
heat
pumps.
(Also
see
figure
below)
Step
time
between
heat
pumps
As
written
in
“Tempdiff
between
heat
pumps”
heat
pumps
will
start
when
the
temperature
decreases
in
the
tank.
However
it’s
also
possible
to
start
heat
pumps
with
time
control
even
if
the
temperature
hysteresis
isn’t
fulfilled.
When
first
heat
pump
is
started
a
timer
start
and
after
the
set
time
delay
has
passed
next
heat
pump
will
start.
(Also
see
figure
below)