NuAire OPUS 30 Instruction Manual

NuAire Limited
Western Industrial Estate Caerphilly,
CF83 1XH United Kingdom.
Telephone: [phone]
Facsimile: 029 2088 7033
Email: [email protected]
www.nuaire.co.uk
Leaflet 670626
SEPTEMBER 2001
OPUS 30 12 Volt
Surface Mounted ('B' range)
Domestic Extract Fans
Introduction
NuAire's OPUS 30 range of surface mounted domestic extract
fans are designed not only to meet the requirements of the
building regulations document F1 1990, but also that of the
16th edition IEE Wiring Regulations On Site Guide.
The units are designed to ventilate bathrooms / shower rooms
where the unit is to be mounted in the 'splash zone'.
(See Installation section).
They discharge air through 100mm dia. pipe and have
provision for adding a 50mm. dia. subsidiary inlet to extract air
from a second room.
Ty pical arrangements
surface mounting, wall or ceiling
One room extraction
Two room extraction
(with side subsidiary).
Two room extraction
(with rear subsidiary).
Semi recessed version
Units are available with one or two fans (run & standby) with
a duty of 32 l/s.
Inlet is through filters located on the front cover of the unit
which can easily be removed for cleaning.
Units can be fitted with a selection of controls which enable
them to be linked to light switches, either directly or through
run-on circuits.
Coding
BS12 Single fan unit incorporating a run-on circuit.
2BAS12 Twin unit incorporating both run-on and fan.
failure detection/change over circuits.
Installation
and Maintenance
Contents Page
Introduction 1
Arrangements and Codes 1
Installation 2
Adjusting the run on timer 2
Dimensions & Ancillaries 3
Maintenance 3
12V Transformer details 4
Spares & Service 5
Electrical Diagrams 6
1
Fig. 1. General view of unit.

Adjusting the run-on timer
Remove cover. Locate the Time Delay Adjustment at the
plastic box integral with the fan module directly between and
under the fan scroll mouldings (see fig. 5). Re-set against the
graduated scale. Re-fit the cover.
d) Fit the fan module to the case, mating it's plug fully
with the internal socket. Lock with the spring clips.
Fig. 5.
e) Fit the front cover using the four screws supplied.
Fit the two filters into the rebates in the front cover.
Test/run the unit.
c) Position the case in the mounting position, connect to
the ductwork and feed the supply cable through the
cable entry. Fig. 4.
Secure with three No. 8 woodscrews, drilling and
plugging the mounting surface if necessary. Connect
the wiring to the internal terminal block/socket.
Installation and Maintenance OPUS 12V (B range)
Fig. 5. Fan module in position
Fig.3. Fitting a subsidiary spigot.
Fig. 4. Cable entry
2
Installation
Note: 'SPLASH ZONE'
The splash zone can be considered to be an area within a bath-
room or shower room where a person using the bath or shower
could effectively reach. An arms reach is defined as 0.6 metres
from the edge of the bath or shower up to a height of 2.25
metres.
a) It is assumed that a solid non reverberant mounting
position has been selected, and the necessary passages
for ductwork, from outlet spigot and to subsidiary
inlet spigot (if a second room is to be ventilated) as
well as the electrical connection have been prepared.
It is also assumed that compatible ductwork is already
installed.
b) Remove the fan module from the case.
If a second room is to be served, remove the
appropriate knockout area from the case 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 3a and 3b. Remove the relevant
cable entry in the back of the casing.
Spring
clips
Humidistat
adjuster and / or Timer
adjuster

Dimensions
Optional ancillaries
Maintenance
General
It is inevitable that some dust, fluff etc. will pass through the fil-
ters, and which, 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. To clean the filters,
remove them from the unit , wash in tepid water to which a lit-
tle mild detergent has been added. Shake out excess water and
allow to dry naturally. Replace when dry.
Isolation
Ensure that the unit is totally isolated from the electrical supply.
This is particularly important when dealing with a run-on cir-
cuit or a continuously running fan unit with boost when the
room light is switched on (letter X in the Model Code) AS 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
balance of the impellers. Remove the cover and then the fan
module after releasing the spring clips. Inspect all parts.
Using a brush or dry cloth clean the backplate. Lightly brush
away dust and dirt from the fan module. If stubborn, 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 the unit.
Adjusting the run-on timer
Remove cover. Locate the Time Delay Adjustment at the plastic
control box integral with the fan module. Re-set against the
graduated 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 invalidate the
guarantee. The unit is guaranteed for a period of 3 years.
Installation and Maintenance OPUS 12V (B range)
3
307
225
98 OD
2nd room
duct spigot
positions
'A'
55
5Filters
98 O.D.
230 ctrs
3 x Fixing holes
(Drill and plug mtg
position for
No.8 Woodscrews)
158 ctrs
Dimension 'A'
Opus 30 138
Opus 60 182
Knockouts
for cable entry
Knockouts for optional
Subsidiary spigot
View on back of case
Outlet Baffle Roof Cowl Wall Cowl Subsidiary Spigot 50mm Inlet grille
160
230
230
146
165 dia
98 o/d
Birdguard
148
134
98 O.D.
32
50 o.d.
30 7
125
125
13.5
15
110 fix ctrs
50 O.D.
4 x 3.7 dia fix holes

Installation and Maintenance OPUS 12V (B range)
4
12v Transformer details
Installation of Transformer enclosure
The enclosure containing the transformer is intended to be
mounted out of sight (e.g. in a loft, cupboard, under floorboards
etc.). However, if this is not possible the transformer enclosure
should be mounted as close to the ceiling, or as far from the
"splash zone" as possible (see page 2 for definition of the splash
zone). As can be seen from the table of wiring sizes on page 5,
it is advisable to place the enclosure as close to the fan as
possible to reduce the costs of wiring and assist in installation.
Procedure
1. Remove two screws securing the cover and remove the cover.
2. Position the enclosure on mounting surface and route cables
into rear. Mark the fixing points on the mounting surface and
secure using suitable fixings (by others).
3. Connect wiring as shown.
4. Replace cover.
KEEP VENTS CLEAR OF OBSTRUCTION.
NOTE:
NO EARTH IS TO BE CONNECTED BETWEEN
TRANSFORMER AND FAN
SIDE VIEW
PLAN VIEW
VIEW INSIDE COVER
END VIEW
Cover fixings
147 mm 85 mm
85 mm
60 mm
Mains supply
230v 1ph 50Hz
12v supply to fan
N L SL 240V
N L SL
12V

Spares
OPUS 30 single fans
ITEM PART No.
Front grille assembly 770874
Foam Filter set (all units). 630016
Transformer assembly 771921
Internal assembly:
BS12 units 771287
OPUS 30 Twin fans
ITEM PART No.
Front grille assembly 770874
Foam Filter set (all units). 630016
Transformer assembly 771922
Internal assembly:
2BAS12 units 771290
Service
As a manufacturer NuAire provides you with factory trained
Service Engineers.
Our Engineers are supported by a comprehensive range of spare
parts 'off the shelf'.
If you are an industrial or commercial user, you may be interest-
ed in details of NuAire's regular maintenance Service Contracts.
This is a worthwhile service that helps you get the most from
our products.
Our Service Department will be happy to give you more infor-
mation.
Please telephone: [phone]
Please fax: [phone]
3 Year Warranty
The three year warranty starts from the date of delivery and
includes parts and labour for the first year.
The labour element is subject to full, free and safe access to the
equipment as recommended by the CDM regulations.
The remaining two years covers replacement parts only.
NOTE:
Installation & Maintenance of the equipment must be as
directed in the instructions provided with the unit.
Installation and Maintenance OPUS 12V (B range)
5
Installation Notes:
TABLE OF WIRING SIZES
It is important to note that the size of wire used between the
transformer and the fan unit can have an adverse effect on the
units performance if the following table is not adherred to.
Mains supply (240v) ......................0.5mm sq.
TRANSFORMER TO FAN
Cable run (max. 10m) Cable size
Up to 2m ...................................0.75mm sq.
Up to 4m ...................................1.00mm sq.
Up to 6m ...................................1.50mm sq.
Up to 10m .................................2.50mm sq.
Power consumption
Unit input power (watts). ..............................42.0
Full load current (amps). ................................ 4.2
Starting Current (amps). ............................... 4.4
Transformer input power (watts)................ 67.0
Full load current (amps). ............................... .34
Starting Current (amps). .............................. .35

6
N
L
N
L
N
L
N
L
N
L
Switch
240v 12v
Room light
Room light
Transformer
Transformer
Transformer
3
1
N
L
2
●
●●
●
●
●
●
●
●
●
●
●
●
Switch
●●
BS12 Unit ventilating one room (using run on circuit).
BS12 Unit ventilating one room. BS12 Unit ventilating two rooms.
2BAS12 Unit ventilating one room, (no run on timer).
Fuse
2 Amp max
Fuse
2 Amp max
Switches (double pole)
Fuse
2 Amp max
C
C
Room light
CC
Installation and Maintenance OPUS 12V (B range)
Electrical Diagrams
N
L
N
L
240v 12v
Transformer 3
1
N
L
2
N
L
N
L
N
LSwitch
240v 12v
Transformer
240v 12v
Room light
3
1
N
L
2
●
●●
●
Fuse
2 Amp max
C
SL
N
L
SL
N
L
SL
N
L
SL
N
L
240v 12v
3
1
N
L
2
3
1
N
L
2
3
2
3
1
N
L
2
Transformer
SL
N
L
SL
N
L
240v 12v 3
1
N
L
2
SL
N
L
SL
N
L
2BAS12 Unit ventilating one room (using run on circuit).
N
L
Switch
Room light
Remote fail LED
Remote fail LED
Remote fail LED
Remote fail LED
3
1
N
L
2
●
●
●
●
●
Fuse
2 Amp max
C
N
L
●
●
●
●
●
●
Fuse
2 Amp max
Switches
(double pole)
Room light
CC
N
L
●
●
●
●
●
●
●
BS12 Unit ventilating two rooms (using run on circuit).
2BAS12 Unit ventilating two rooms (using run on circuit).
Fuse
2 Amp max
Switches
(double pole)
Room light
CC
N
L
●
●
●
●
●
●
●
2BAS12 Unit ventilating two rooms, (no run on timer).
Wiring details for remote indicator.
Fuse
2 Amp max
Switches
(double pole)
Room light
Fan terminal block
Remote
indicator panel
3
1
N
L
2
N
L
N
L
CC

7
We declare that the machine named below
conforms to the requirements of EC Council Directives
relating to Electromagnetic Compatibility and
Safety of Electrical Equipment.
Designation of machinery :- OPUS EXTRACT FANS
Machinery Types :- OPUS 30 (‘B’ RANGE) 12VOLT
Relevant EC Council Directives :- 89/336/EEC, 92/31/EEC (EMC)
73/23/EEC, 93/68/EEC (Low Voltage Directive)
Applied Harmonised Standards :- E50081-1, EN50082-1, EN60204-1
EN60335-2-80
Basis of Self Attestation :- Quality Assurance to BS EN ISO 9001
BSI Registered Firm Certificate No. FM 149
Signature of manufacture representatives :-
Name: Position: Date:
1) C. Biggs Technical Director 3. 3. 00
2) W. Glover Manufacturing Director 3. 3. 00
NuAire Limited,
Western Industrial Estate,Caerphilly, Mid
Glamorgan,CF83 1XH.
United Kingdom.
Telephone: [phone]
Fax: [phone]
Email: info @ nuaire.co.uk
www.nuaire.co.uk
MARCH 2000
DECLARATION
OF CONFORMITY

Western Industrial Estate, Caerphilly,
CF83 1XH United Kingdom.
Telephone: [phone] Facsimile: 029 2088 7033,
Email: [email protected] www.nuaire.co.uk
Leaflet No. 670626
Technical or commercial considerations may, from time to time,
make it necessary to alter the design, performance and dimensions
of equipment and the right is reserved to make such changes
without prior notice.
8
Installation and Maintenance OPUS 12V (B range)
NOTES
NB
If you have any comments or
queries on any of our products or
services please write to the
Marketing Services Manager at the
main address opposite
GP146