Honeywell KromSchroder IC 40, Technical Information, Page: 29 / 72

IC 40 · Edition 07.18 29
middle
t [s]
high
low
closed
DI 1
DI 2
t [s]
t
1
t
2
t
3
t
4
t
5
t
6
Function
3 .5 .11 3-stage operation with two digital inputs
Operating mode 11
In idle state (DI 1 and DI 2 with no signal), the actuator
is in “closed” position and the butterfly valve is closed.
If a signal is applied to DI 1 (DI 2 with no signal), the
butterfly valve moves to “low” position (ignition position
and low-fire rate position).
If a signal is applied to DI 2 (DI 1 with no signal), the
butterfly valve moves to “high” position for pre-purge.
If a signal is applied to DI 1 and DI 2, the butterfly valve
moves to “middle” position (high-fire rate).
DI 1/V1 DI 2/air valve IC 40 Position Valve position
Off Off closed Closed
On Off low Ignition position/low-fire rate
On On middle High-fire rate
Off On high Pre-purge
Example of application, see page 8 (Staged control
with pre-purge).
Operating mode 11