Exhausto VEX200 series, Mechanical Installation Instructions

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5.2.2 Servicing and cleaning
Cleaning motor/fan See section "Internal transport with reduced weight" for details on how to remove
the fan units.
Step Action
1 Switch off the power supply to the unit at the isolation switch before
opening the doors
2 Clean the fan impellers with a vacuum cleaner and wipe down with a
damp cloth if necessary
3 Clean the impeller blades carefully, so as not to disturb the balance
4 Once re-fitted, check the unit operates without vibrating
Inspection of measuring points hoses
5 Remove the hoses at the connection box
6 Blow air through the hoses to remove any impurities
Cleaning cold water
coil/heating coil
Step Action
1 Switch off the power supply to the unit at the isolation switch
2 Vacuum clean the cold water coil/heating coil
3 Cold water coil: clean the condensation tray
4 Check the fins on the exchanger are not deformed.
The fins are sharp.
Cleaning rotary ex-
changer
Step Action
1 Switch off the power supply to the unit at the isolation switch before
opening the doors
2 Vacuum clean the exchanger with caution, ideally using a soft brush vac-
uum nozzle.
Avoid touching the fins in the exchanger with sharp or
hard objects – the fins are very soft and can easily be de-
formed, which will diminish the performance of the VEX.
3 Check the fins on the exchanger are not deformed.
The fins are sharp.
5.3 Airflow measurement
5.3.1 Determining airflow and pressure
Use the formulae in the table to calculate airflow and pressure drop over the filters.
Airflow:
Airflow q
V
(l/s, m
3
/h) can be read from the dif-
ferential pressure Δp
M
[Pa]
Extract air Δp
M1.2
= P
1.2X
- P
1.2Y
[Pa]
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Maintenance
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