
Technical
Manual
Room
Temperature
Controller
SCN
‐
RT1
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Tel.: +49-2263-880 • Fax: +49-2263-4588 • [email protected] • www.mdt.de
45
4.5.7.1
‐
2
Pipe
system
At
a
common
pipe
system
for
heating
and
cooling,
only
one
communication
object
for
the
control
value
is
available.
Before
changing
between
heating
and
cooling,
a
switchover
must
occur.
The
control
value
can
also
have
only
one
controller
(PI
‐
continuous,
PI
‐
switching,
2
‐
Step
control).
Also
the
direction
must
be
identical
for
heating
and
cooling.
But
the
parameter
for
the
heating
and
cooling
process
can
be
defined
individually
(as
described
from
4.5.2
to
4.5.4).
The
following
illustration
shows
the
setting
option
for
a
2
Pipe
system:
Illustration
30:
2
Pipe
system