Adjustment and maintenance operations |
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R.6.3.2 Motor and belt drive
The bearings are factory lubricated and do not require any service lubrication. The belt drive is to be checked for correct
tightness and that it is undamaged. On smaller AHU, the rotor is fitted with an elastic belt drive and supplied with a re-
serve belt on the rotor. This belt drive does not require service and cannot be shortened. A new belt can be fitted using
specialist tools. On larger heat exchangers the rotor has a V-belt with a belt connector. If the belt is no longer tight, it
must be shortened to a length which enables the motor base frame tightening spring to hold the belt tight. If new
screws are used for the belt connector, they must not have a length which exceeds the thickness of the belt and con-
nector. Remove the excess, if any, with a file.
Check the drive belt annually. Replace if necessary. Reuse both brackets. If new screws are needed do not hesitate to
make the screws even with the surface of the inner bracket.
R.6.4
Counter flow exchanger
Note:
Once a year the edges of the heat exchanger plates are to be checked for cleanliness and damage.
If there is dust on the edges of the plates, remove it with a soft brush. The thin plates are not constructed for cleaning
with compressed air or water.
R.6.4.1 By-pass damper
The damper blades are fitted with synthetic bearings requiring no lubrication. Each damper blade is driven by a gear
drive of a temperature resistant glass fibre reinforced PA6 nylon composite. The steel rods and brass bushes do not
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