Operation and Maintenance Manual, OnyX Sky Heat Recovery Units, 2022/01
Frapol Sp. z o.o. reserves the right to introduce changes without any prior notice.
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6.2
Start-up
The unit can only be started up if it is connected to a ready and fully equipped air duct network (mounted grilles, heaters,
and duct filters, etc.) in which all dampers, fire dampers, etc. are open. All inspection panels must be closed, when the
HRU operates.
After the start-up, the HRU should operate for about half an hour. During the test run, check that the unit
is running smoothly, paying particular attention to:
•
excessive vibration or noise caused by the fan,
•
rotational speed losses, or overheating of the motor.
Should any of the above symptoms appear, immediately switch off the device and eliminate the cause of malfunction.
At the end of the test run, the device shall be inspected in general, as prescribed in paragraph 6.1.
7.
Operation
As the mechanical ventilation system is in operation almost all year round, its individual components should be
periodically inspected and cleaned. From time to time, clean the following:
•
Heat Recovery Unit
•
Control panel
•
Supply air valves and exhaust air valves indoors
•
Fresh air intake and exhaust air discharge grilles
•
Ventilation ducts included in the heat recovery system
DANGER
Before performing any maintenance works, make sure that the supply voltage is disconnected and the circuit
breaker is in the disconnected position.
7.1
Filters
Periodic inspection/replacement of the air filters must be carried out at least every 3 months. It is recommended to
replace the filters at least every 3 months, regardless of their level of soiling, in order to maintain high quality of the
fresh air supplied to the rooms and reduce energy consumption of the fans (a soiled filter causes an additional flow
resistance).
Filtration class
Filter dimensions [mm]
OnyX Sky 250
ISO Coarse 65% (G4)
290 x 230
OnyX Sky 500
ISO Coarse 60% (G4)
400 x 180 x 25
OnyX Sky 750
2x 400 x 180 x 25
OnyX Sky 1000
OnyX Sky 1500
ISO Coarse 65% (G4)
592 x 287 x 200; 592 x 287 x 300,
OnyX Sky 3000
760 x 400 x 100
To check / replace filters, do the following:
•
Press the
button on the controller to shut the unit down.
•
Remove the plug from the outlet, causing the power circuit to be clearly interrupted.
•
Remove/open the inspection panel in the HRU.
•
Unscrew the filter mounting frame cover
•
Remove the filters and check their level of soiling (if necessary, replace them with new ones).
•
Remove the foil packaging from the new filters
•
Insert the filters into the mounting frame. The direction of the arrow on the filter should be consistent with
the direction of air flow through the unit
•
Close the inspection panel and start the unit.
•
The figure below presents the method of filter cartridges replacement
