of the relays. The second type of ventilation manages an inverter
through an analogue output 0 - 10 V.
For ventilation to 3 fixed speeds, set the “minimum speed limit”, it
means keeping the fan speed 1 even when the set is satisfied. While
it has no action on the “Maximum Speed Limit.”
The proportional ventilation, instead, uses the “Minimum speed limit”
to protect the motor from burning (the motor is driven with low signals
but does not rotate) and the “Maximum speed limit” to reduce noise
at high speeds, due to turbulence in air ducts.
The switching on and off are managed by a hysteresis determined
by the same value of the Minimum Limit.
The setting of the Flag “Fan min at set point” keeps the fan speed to
the minimum limit set also when set is satisfied.
Involved parameters:
Ventilation minimum limit = 0
Ventilation maximum limit = 100
Fan at minimum speed @ satisfied set = NO
Heating loop set = 20°C
Fan proportional band = 3
Valve proportional band ON/OFF = 1
Plant = 2 pipes
Loop = heating
Control modes
NR9001 works with 8 different control modes selectable via dip switch
or by supervisory system:
1.
ON/OFF Valves and 3-speed fan (“FAST” operation mode - Oper-
ation Diagram 1).
2.
ON/OFF Valves and 3-speed fan (Operation Diagram 2).
3.
Proportional Valves (3 point or 0-10V) and 3-speed fan (Operation
Diagram 3).
4.
ON/OFF Valves and 1-speed fan (Operation Diagram 4).
5.
Proportional Valves (3 point or 0-10V) and 1-speed fan (Operation
Diagram 5).
6.
ON/OFF Valves and Modulating FAN (0–10V) (Operation Diagram
6).
7a.
2-pipe plant. Proportional Valve (0-10V) and Modulating Fan (0-
10V) (Operation Diagram 7a).
7b.
4-pipe plant: Sequence Valves 0-5/6-10V and Modulating Fan
(0-10V) (Operation Diagram 7b).
8.
3-point Valves and Modulating Fan (0-10V) (Operation Diagram
8).
When using ON / OFF valves and three points, the modulating valves
that share the same temperature set point and the same proportion-
al band can also be used in parallel.
In case of use of 3-speed fans (3 relays), the 0-10V outputs are always
available and they follow the ON-OFF or 3-point valves characteris
-
tics.
The diagrams of the valves and fans share the Set point, instead pro
-
portional bands and hysteresis can be set independently.
It is possible to enable the functions hot/cold launch, “disposal” and
minimum speed activation with a priority over normal operation de
-
fined by the diagrams.
Badge Function
This function can be activated in the tools setting “Function Bagde
= ON”.
In this case the “Forcing regime from local inputs” is disabled and the
digital input D12 is used. The presence of the badge (DI2 = closed)
switches the controller in Comfort mode, while the absence switches
into Economy mode. In addition, the presence of the badge ena-
bles the management of electrical loads through the OC1 output
and the absence disables them with a delay of 30 sec.
Through supervision, if present, it is possible to force the operating
mode independently if the badge function is active or not.
Through STA60M or STA70M sensor, if present, it is possible to force the
operating mode only if the badge function is active.
Only if the badge function is active the electrical loads can be en
-
abled.
Min. Limit and Max Range Set
Through the configurator you can define the minimum and maxi
-
mum value (in the 10-35 range) of the temperature set in STA60M or
STA70M sensors. By setting the minimum and maximum value for the
same value is obtained a fixed-point operation.
Max value of correction of the Set
Through the configurator it is possible to define the maximum value
of corr - of the Set (range 0 - 5).
Through the STA60M or STA70M sensors you can set the values within
the set values.
Manual ventilation shutdown at set satisfied
If the function is enabled, the fan is stopped at a satisfied set even if
there has been a manual forcing.
The default function is enabled and through the configurator (Fan
Manual OFF @ Set satisfied) it can be disabled, thus maintaining the
fan speed forced by the user.
1
st
Issue
06/2019
DBL585e
Page 10
