Mark MDV Blue 225, Техническое руководство, Страница: 5 / 32

EN
3.0 Maintenance
The fan is fitted with maintenancefree ball bearings. The only maintenance required is cleaning
of the impeller. We recommend inspection of the impeller every six months. Before cleaning
disconnect the fan from the mains and block the mains switch. Remove the fan. Do not obstruct
fan‘s balance. Do not use strong detergents or cleaning agents for cleaning. Internal insulation may
be wiped with a damp cloth.
In the case of malfunction:
- Check the mains power is reaching the fan.
- Disconnect from the mains and ensure that the impeller is not blocked.
- If the thermo-contact has been activated, turn off the mains power. Wait until the motor
chills and reconnect the mains power.
- Check if the capacitor is connected (single-phase, refer to the wiring diagram).
- If the fault persists, change the capacitor. If that does not help, contact the supplier.
4.0 Wiring diagram [2] [3]
[2]
For controlling one MDV Blue roof fan.
[3]
For controlling multiple MDV Blue roof fans (maximum 8) with one Potentiometer or
0-10VDC signal.
5.0 Roof curbs [5]
(all measurements are in mm)
(1) Roof curb
(2) Roof curb with self-closing valve
(3) Roof curb with round fitting
(4) Roof curb with self-closing valve and round fitting
(5) Roof curb with silencer
(6) Roof curb with silencer and self-closing valve
(7) Roof curb with silencer and round fitting
(8) Roof curb with silencer, self-closing valve and round fitting
(9) 0-30º adjustable roof curb
6.0 Accessories
A sound demping plate
[10]
is available for all MDV Blue roof fan types. The plate gives an
aesthetic finish to the intake opening and provides a sound reduction of approx. 3 dB.
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