page no. 39 of 44
NVx Range Users, Installation & Servicing Instructions issue 6.4 Aug 2017.
6. Fit replacement exhaust fan, using new gaskets and
silicon sealant as necessary, and reassemble in reverse
order.
2.7.6.6. Air Pressure Switch
1. Remove the two screws securing the cover and remove
cover.
2. Disconnect electrical connections.
3. Pull off the sensing tube from the air pressure switch.
4. Note the setting of the old pressure switch.
5. Remove the screws fixing the air pressure switch and
remove switch.
6. Fit replacement in reverse order refitting the sensing
tube to the negative (- or L) tapping on the pressure switch.
Adjust setting to that of the old pressure switch.
2.7.6.7. Control Box
1. Unplug all the electrical connections.
2. Remove the two screws that secure the control box in
place.
3. Fit replacement in reverse order.
2.7.6.8. Centrifugal Fan/Motor
1. Disconnect the electrical connections to the centrifugal
fan section.
2. Remove the side panels of the section for access to the
fan and motor.
3. Fit replacements as appropriate and reassemble in
reverse order.
Note: If a 3ph motor is being replaced ensure
that the direction of rotation is correct. If it is
not interchange any two of the three phases
connected to the motor.
