b)
Separate the two halves of the unit by releasing the two
clips on either side of the unit. Release the two internal
clips and remove the fan unit. See Fig. 3.
Fig. 3. General view, cover and fan unit removed.
c)
If a second room is to be served, remove the appropriate
weakened area from either cover and working from the
inside fit the subsidiary inlet spigot by passing it through
the case and turning quarter of a turn to lock. Fig. 4a
and 4b. Remove the relevant cable entry in the back of the
casing.
Fig. 4a. Fitting a subsidiary spigot
Fig. 4b
d)
Fit the mounting brackets (supplied) to the portion of the
case containing the wiring socket, using four self-tapping
screws and washers supplied. Fig. 5.
Fig. 5 Fitting the mounting brackets
.
e)
Assemble the outlet spigot to the ducting and fix the casing
to a solid non-reverberant surface using four No. 8 wood
screws through the mounting brackets drilling and plug-
ging the fixing area if necessary.
Fig. 6a Vertical mounting
Fig 6b Horizontal mounting
Note:
When the unit is mounted in a vertical configuration it is
important that the air flow is upwards so that the gravity operat-
ed shutters will work properly (see Fig. 6a). For horizontally
mounted units ensure that case is installed as shown in Fig. 6b.
Fig. 7 Cable entry.
f)
Feed the supply cable through the cable entry Fig. 7.
Connect the wiring to the internal terminal block/socket.
Fig. 8 Fan module in position.
g)
Fit the fan module to the case, mating it’s plug fully with
the internal socket. Lock with the spring clips. Fig. 8.
h)
If a second room is to be ventilated, connect the subsidiary
ductwork to the 50mm spigot.
i)
Secure the adaptor to the 100mm dia. flexible ducting
supplied using duct tape (by others). Insert the adaptor
into the already prepared inlet side ductwork and seal. Fit
the other end of the flexible ducting to the spigot on the
remaining (cover) half the case. Fig. 9.
Fig. 9 Fitting the flexible ducting.
j)
j)
Replace the cover. Test/run the unit.
Installation and Maintenance
OPUS ( M range )
2
