Sauter flexotron®800
ventilation
Functional description
P100012082
35
Electric heating
Control
The heating is controlled using the analogue output
’’Y1 Heating’’. On activation of the
digital input
‘‘High temp limit switch’’ the unit will be shut down, either according to the
stop sequence described in section
Start/stop of unit
or as an emergency shutdown.
The unit will restart after the alarm has been acknowledged and
‘‘High temp limit
switch
’’ has reset. Note that activation of the input signal ‘‘Flow switch’’ will also stop the
unit.
Wiring suggestion high temp limit when using electric heating.
Contactors drawn
inactivated
.
It is important that the high temperature thermostat is hardwired to disconnect the
power to the heater to ensure that the heating is shut down when the thermostat is
activated even if the flexotron®800 should be faulty.
Water heating and electric heating
The water heating is controlled by "Y1 Heating", and the electric heating is controlled by
the sequence "Split". Split (see the section Split of optional temp sequence) must
always be set to "Heating". On increasing heat demand, the water heating is first
activated and then, if needed, the electric heating.
Frost protection and overheating protection are both active. If "step controller heating"
is used, the function is tied to the output signal "Split".
Fast stop on overheating
If the function "fast stop on overheating" is active, the fans will be immediately stopped
when there is an overheating alarm, regardless of the set cool-down time.
In- and outputs
Water
heating
Electric
heating
AI
Frost protection sensor (optional)
DI**
Frost protection thermostat water heater (optional)
DI
High temperature limit switch
DI
Flow switch (optional)
**Frost protection can also be created using the digital input
‘‘Frost protection
thermostat water heater
’’ and an external thermostat. Activation of the input will force
the running mode to Off and an alarm will be activated. The heating output is set to
completely open, the remaining control outputs are set to zero.