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Pump/valve kick duration
Pump kick with
modulating
pumps:
Building Technologies Division
6.23.23 Control of flue gas damper
For function Control of flue gas damper, it is mandatory to parameterize an input Hx
Feedback flue gas damper and an output Qx Control flue gas damper.
The function can only be parameterized once in a system. If parameterized several
times, or if only partly parameterized, error message Parameterization flue gas damper
is delivered.
If correctly parameterized, the function is automatically activated.
When there is a request for heat from the controller, the LMS14... controls the output or
causes the actuator of the flue gas damper to open the damper and waits for the
feedback signal (Opening) via the parameterized input.
The feedback signal must be delivered within 50 seconds after control of the actuator.
Otherwise, error message Feedback flue gas damper is generated.
While waiting for the feedback signal, the burner maintains the Start prevention state.
When the flue gas damper reaches the Open position, the burner is released.
Feedback from the flue gas damper is also monitored during operation. If an end switch
becomes faulty, or if the flue gas damper closes unexpectedly, error message
Feedback flue gas damper is generated.
If the controller cancels the request for heat, the flue gas damper closes and feedback
signal Closed must be delivered. Here too, the damper must reach the new position
within 50 seconds.
If that time is not observed, error message Feedback flue gas damper is delivered.
6.23.24 Pump/valve kick
Line no.
Operating line
6127
Pump/valve kick duration
Pump and valve kick is a protective function aimed at preventing the pumps and valves
from seizing. When the pumps are switched on, the water in the system starts to
circulate. The mechanical parts of the pumps and the valve seats are purged, thus
preventing the pumps and valves from seizing.
Every Friday at 10:00, the pumps connected directly to the basic unit are activated for
the set kick time, one by one, at an interval of 1 minute.
The valve kick is activated only when there is no request for heat.
During pump kicks, the PWM value is always 100%.
An exception are pumps whose start kick can be parameterized.
When using these types of pumps, the parameterized start kick value is also used
as the PWM value for the weekly kick.
User Manual LMS14...
6 The settings in detail
441/617
CC1U7471en
28.01.2015
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