Installation and Maintenance
OPUS ( M range )
3
Maintenance
General
Dust, fluff etc. if allowed will build up internally on motors
and impellers, shortening the life of the unit and, in severe
cases, leading to overheating of the motors. Consequently, it is
strongly recommended that all units are inspected and cleaned
every six months.
Isolation
Ensure that the unit is totally isolated from the electrical sup-
ply. This is particularly important when dealing with a run-on
circuit or a continuously running fan unit with boost when
the room light is switched on (letter X in the Model Code)
NOTE THE INPUT SOCKET TERMINALS WITHIN
THESE UNITS REMAIN LIVE, EVEN WHEN THE
ROOM LIGHT OR OTHER ACTUATING SWITCH
IS OFF.
Take care therefore when working within the case with the
fan module removed.
Procedure
At all times, take care not to damage, distort or disturb the bal-
ance of the impellers. Remove the cover and then the fan
module after releasing the spring clips. Inspect all parts. With a
brush or dry cloth clean the backplate.
Lightly brush away dust and dirt from the fan module. If stub-
born, carefully remove with a suitable blade or scraper. Wash
the cover in warm soapy water.
Dry thoroughly. Refit the fan module, followed by the cover.
Test/run.
Adjusting the run-on timer
Remove cover. Locate the Time Delay Adjustment at the plas-
tic box integral, with the fan module. Re-set against the gradu-
ated scale. Re-fit the cover.
Warranty
The plastic control box integral with the fan assembly is a
sealed component. Breaking the plastic sealing tie will invali-
date the guarantee. The unit is guaranteed for a period of 3
years. First first year parts and labour, remaining two years
parts only.
2nd room duct
spigot positions
98 O.D.
158 ctrs
225
10
230 ctrs
307
A
92
168
Dimension 'A'
Opus 30 144
Opus 60 188
55
Dimensions
Optional
ancillaries
50 & 100 mm Inlet grilles
Roof Cowl
Wall Cowl Outlet Baffle
160
230
230
146
165 dia
98 o/d
Birdguard
148
134
98 O
.D.
32
125
125
13.5
15
110 fix ctrs
50 O
.D.
4 x 3.7 dia fix holes
125
125
13.5
15
110 fix ctrs
99 O
.D.
4 x 3.7mm dia fix holes
on 110 mm fixing ctrs
