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| Adjustment and maintenance operations
R.6 Other functions to maintain
R.6.1 The unit
It is very easy to remove inspection doors for extraordi-
nary good access to cleaning, service, repairs and re-
placement of components in the unit. Lift the stainless
steel shaft in the hinge to remove the door
The unit should be cleaned once a year when operating with normal air quality for comfort ventilation with no special
hygiene requirements.
To clean the unit, dry it off with a dry cloth, or use water mixed with a non-corrosive cleaning medium.
Any corrosion — for example the bottom of the section for outdoor air intake and the bottom of the section for exhaust
air outlet must be cleaned off immediately, and the surface treated.
In special operating conditions, where the air is aggressive or very humid, for example, or where there are special hy-
giene requirements, the unit shall be cleaned more frequently as required.
Cleaning medium and method should be adapted to the relevant conditions. Any corrosion should be cleaned off imme-
diately, and the surface treated.
Closing mechanisms are to be lubricated at least once a year. Synthetic door hinges are service free. Seals around in-
spection doors are to be cleaned at least once a year and are to be checked for leakage.
It is recommended to treat the seals with a moisture repellent agent.
All seals are to be inspected at least once a year and are to be repaired if necessary.
Grilles for air intake and exhaust air outlet are to be cleaned at least once a year to prevent blockage.
R.6.2 Dampers
Rubber seals between the damper blades and the frame
are to be checked once a year. These seals are not to be
lubricated or treated in any other way.
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