page no. 37 of 48
LNVx Range Users, Installation & Servicing Instructions Doc Ref M104 issue 1.0 Sep 2018.
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.
1. Unplug all the electrical connections.
2. Remove the two screws that secure the control box in
place.
3. Fit replacement in reverse order.
1. Unplug all the electrical connections by squeezing each
side to release.
2. Using a small flat screwdriver push on the locking tab
of each PCB mount and gently ease the board upwards to
release.
3. Fit replacement in reverse order.
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.