EN - How does the roof washer program work

EN - How does the roof washer program work

  
Question

How does the roof washer program work?



 Answer 



control roof washer
You can choose between 'Yes' and 'No'. This activates the actuation of the roof washer for the relevant climate group.

roof washer: type of start time
roof washer: start time - h:m
roof washer: type of stop time
roof washer: stop time - h:m
These settings are used to specify between what times the roof washer may operate. This is usually the afternoon and overnight. 
For example, from 16.00 hours to 7.00 hours. 

condition release: minimum outside temperature - °C
condition release: maximum wind speed - m/s
condition release: maximum vent position - %
These settings allow you to specify the outside conditions and the vent position that apply for the roof washer to be released. The roof washer is released if:
  1. the outside temperature is higher than the setting 
  2. the wind speed is lower than the setting 
  3. the vent position computed on the lee side is lower than the setting 
condition start: maximum vent position - %
If the vent position has actually lowered to below this level, a start command is given to the roof washer to start operations.



roof washer: status
This setting indicates the roof washer status.
  1. allowed on
    The roof washer is allowed on. 
  2. breakdown
    The roof washer has developed a fault (finish time has passed). 
  3. stop
    The roof washer has started but is no longer showing any activity 
  4. start
    The roof washer can start operating 
  5. release
    The roof washer may start operating in light of the conditions inside and outside the house
  6. off wind
    The roof washer cannot operate because the wind is too strong. 
  7. off vent position
    The roof washer cannot operate because the vent positions are too high 
  8. off outside temperature
    The roof washer cannot operate because the outside temperature is too low 
  9. off
    The roof washer is off. 


roof washer: fault
roof washer: fault outside period
The roof washer operates automatically. However, a maximum washing time (see alarm: maximal washing time per section) is used to monitor whether the roof washer has completed its task within the specified time. If the maximum washing time is exceeded, a breakdown situation is triggered. 

There are two alarm settings to indicate a breakdown. This is in order to be able to offer you a silent alarm. The 'roof washer: breakdown' alarm is always activated in the event of a breakdown. The other alarm depends on the time when the breakdown occurs. The 'roof washer: fault outside period' alarm is activated outside the wash period Signalling by each alarm can be set in accordance with personal preference. 

If you wish to have an alarm whenever there is a breakdown, signalling by the 'roof washer: breakdown' alarm can be initiated. Signalling by the 'roof washer: fault outside period' alarm can then be switched off (no unnecessary second signal).
 If no signalling within the washing period is required (usually at night), the 'roof washer: fault' alarm can be made a silent alarm (no signals). The time of the overnight breakdown and the location are visible in the alarm report. If the alarm still continues after the washing period, the 'roof washer: fault outside period' alarm will also be activated (with signal). 

alarm: maximal washing time per section - h:m
This can be used to set the maximum washing time per section. If the roof washer is still not finished in the section once this maximum washing time has elapsed, the 'roof washer: fault' alarm is triggered. The washing time is recorded in 'counter washing time actual section'.



roof washer release: actuations
This is used to indicate that the roof washer has been released.
  1. on
    A message is transmitted to the roof washer that the climate group may be washed in light of the climate and weather conditions. 
roof washer start: actuations
This is used to indicate that the roof washer can start.
  1. on
    A start command is given to the roof washer to enable it to operate. 
roof washer: detection
The roof washer activates this detection if it wishes to operate in a bay where this is allowed ('release' actuation must be active). The program responds to this detection by closing the vents and activating the 'start' actuation. Then the roof washer has to start moving. The roof washer has to keep the detection active until the section is finished. 
  1. 1 = the roof washer is moving or is about to move.
  2. 0 = the roof washer is not moving. The vents may open if the detection is 0 for longer than one minute, a sign that the roof washer is not in the process of changing section.
'roof washer: detection' may not be active if 'actuation release' is not active. If this happens, it indicates there is a fault. The vents do not close and 'actuation start' is not activated in this situation for safety reasons. 


An example of an interface which shows the status of the roof washer





condition start: max deviation measurement vent position - %
It is possible that the vent position measurement does not move exactly to the computed position where the roof washer may start. The roof washer is not released if the measurement deviation is greater than the figure set here. Furthermore, the system waits until the vent is no longer being actuated unless the vent is continuously closed with a computed position of 0%.

measurement: biggest vent position - %
The maximum vent position in this group is entered here. 'roof washer start: actuations' can only be set to 'on' if 'measurement: biggest vent position' is lower than 'condition start: maximum vent position'. 
When evaluating 'condition release: maximum vent position' the program does not use a measurement but a computed vent position. This enables the vents to remain closed when changing section while it is still possible to check whether 'condition release: maximum vent position' is still being met. 






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