5.22 Periodical maintenance function
Certain maintenance functions of the ventilation unit must be performed at regular
intervals, e.g. fire protection test or valve/pump kick function. For some functions,
the ventilation unit must always be stopped to complete the entire process. Others
can be made during operation, e.g. cooling valve/pump kick in winter.
In order to perform these functions efficiently and inconspicuously, all periodic
functions can be performed in one period and thus the ventilation (if necessary at
all) can only be switched off once in a certain time.
The functions are automatically linked to the periodic maintenance function during
commissioning.
The following functions are operated in the order shown:
Fire damper test (only if
existing)
After ventilation is shut down, dampers are driven open and close to check that
they are working correctly
Valve and pump kick
When ventilation shutdown is required due to fire damper test, valve and pump kick
function is carried out during shutdown. Otherwise the kick function is executed
while the plant is running.
Each valve and pump which is not otherwise operated within the last 7 days, is part
of the kick function.
●
Valves are opened fully for 30 seconds, then closed again.
●
After 20 seconds, valves are moved to 6% position and the pumps are
switched on for 30 seconds.
After all functions have been operated, ventilation start-up is made and normal
operation is resumed.
Available parameters
Current values
BACnet object
R/RW
Note
Maintenance function status
PrMntnSta
MVAL,165
R
1: None
2: Shutdown plant
3: Fire damper test
4: Kick function
5: Restart plant
Trigger maintenance functions
Prio 8, 13: manual triggering
Prio15: trigger via scheduler
MntnCmd
BVAL,213
RW
Trigger,
reset after 60 sec.
Basic settings
BACnet object
R/RW
Note
Interval for automatic maintenance function
MntnSched
SCHED,3
RW
BACnet scheduler
Application functionalities
Periodical maintenance function
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